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What is a carbide roll?

Carbide roller ring (also known as tungsten carbide roller ring), superior performance, stable quality, high precision machining products, have good wear resistance and high impact resistance.

Carbide roll is based on tungsten carbide and cobalt as the material made by powder metallurgy method of the roll. Carbide rolls are available in both integral and modular versions.

Tungsten Carbide Roller Ring It was born in 1909 with the advent of the metalworking industry after the advent of powder metallurgy technology. Since 1918 Germany introduced a carbide drawing die, inspired the countries of the carbide research, the use of various rollers have also appeared. But a large number of applications of cemented carbide roll is after 1960. In 1964 Morgen's first high-speed torsionless wire mill was born four times as fast as the wire finish. As the finishing mill is working at high speed and high stress, the wear resistance of cast iron roller and tool steel roll is poor, the life of rolling groove is short, the repair and handling of roll is very frequent, which affects the performance of rolling mill and is not suitable for finishing rolling Of the requirements, it was replaced by a combination of carbide roller. The world has more than two hundred sets of Morgan-type rolling mill, the annual consumption of hundreds of tons of carbide roll.

Carbide roll has a high hardness, and its hardness value varies little with temperature, 700 ℃ when the hardness value of high-speed steel 4 times; and elastic modulus, compressive strength, bending strength, thermal conductivity are also Higher than the tool steel more than 1 times. Since the thermal conductivity of the cemented carbide roll is high, the heat dissipation effect is good, so that the roll surface is at a high temperature for a short time, so that the high temperature reaction time of the harmful impurities in the cooling water with the cooling water is short. Therefore, the carbide roll is more resistant to corrosion than the tool steel roll, and is resistant to cold and heat.

Development of Cemented Carbide Compound Roll

The successful application of cemented carbide rolls in high-speed wire finishing and pre-finishing mills has greatly contributed to the development of cemented carbide applications in other hot-rolled areas . Carbide composite rolls have also been developed and applied . Since the beginning of the decade , cemented carbide has been used in general to wire mills , finishing mills and bar finishing mills . This roll was originally designed in the form of a set of composite rolls , which are to be mounted on the steel roll body by means of the friction of the inner bore of the roller ring or by the clamping force of the end face , The typical design is the Bellville spring method , which passes a sufficiently large locking force against an alloy spring to overcome the rolling torque force to make the spring elastic and to use a more complex tool when assembling it . If it is necessary to install the integral alloy roll of the cemented carbide on a common intermediate frame , the roll ring does not produce dangerous circumferential stress . The use of the Piegelin nut and the tightening of the bolts can cause the rolling torque to , It is beneficial to use an intermediate tapered sleeve in order to eliminate the radial clearance of the roll ring and the drive shaft.

The use of hydraulic installation of cone-shaped velvet and Piegelin nut combination of the method of assembling the set of composite roll . Carbide-mounted composite rolls have been used to achieve significant economic benefits of conventional wire rods and slabs , but with the development of rolling technology , the increase in rolling mill speed requires not only the roll Large rolling force and torque shear force 'and requires a higher operating rate and lower production costs for the mill . The composite roll with integral carbide roll set is not enough to meet these requirements . So in the early eighties of the twentieth century , the Swedish mountain to Weike company proposed a casting method of composite carbide rolls program . With the carbide roller ring and toughness of the ball cast iron cast together to form a metallurgical combination (Ie , 010 composite roll> 丨s after years of ductile iron , casting technology, carbide roller rings, material and size and heat treatment of years of research , the program first in the steel pipe tension reduction Roller and feed roller , and in the further development , the application has been gradually achieved in the higher rolling mill . In 1988 , the compound roller reached the level of marketization and regularization . The composite roll can be used to replace the chilled cast iron roll , the set of composite roll and the integral carbide roller . It can be used in the general rolling mill of bar , steel bar , flat steel and profile and pipe . 20 ~ 30 times , and achieved good results and significant economic benefits.

Professor Yan Dadian Yongjun: lead the world, the direction of development of superhard materials

May 25, 2017, Hebei Province Science and Technology Award Conference held in Hebei Hall. At the meeting, the "Hebei Provincial People's Government on the 2016 Hebei Province Science and Technology Award decision", Yanshan University Professor Tian Yongjun with nano-twin structure of diamond, cubic boron nitride block research and development, won the 2016 Hebei Province outstanding contribution to science and technology prize.

"The team led by Comrade Tian Yongjun answered the question" whether there was a harder material than natural diamond. "This 50-year question, sparked a new proposition that would produce harder nano-diamond-based artificial materials. 2016 Hebei Province Science and Technology Award Bulletin, the Tian Yongjun credit given such an evaluation. Tian Yongjun creatively established the predictive model of covalent crystal material hardness, which solves the problem of "hardness quantitative prediction", which makes the quantitative design of superhard material become reality.

His research results by the US Academy of Sciences and other domestic and foreign counterparts spoke highly of, and more than 100 international research institutions widely used.

Designed a series of super-hard crystals, some have been experimental synthesis. The United States, "the focus of physical criticism" to "layer upon layer to open the hardness of the veil" for the title of the special comments, stressed the difficulty and value of the work. He broke through a number of technical difficulties, have synthesized ultra-fine nano-twin structure of cubic boron nitride and diamond block hardness of 2 times the natural diamonds.

With its manufacturing cutting tool to achieve the hardened steel mirror processing, will bring the modern processing industry and high pressure science and technology change.

Carbide Tool Materials Basics

Carbide is the most widely used class of high speed machining (HSM) tool materials, which are produced by powder metallurgy processes, consisting of hard carbides (usually tungsten carbide WC) particles and softer metal binders composition. At present, there are hundreds of different components of WC-based carbide, most of them are using cobalt (Co) as a binder, nickel (Ni) and chromium (Cr) is also commonly used binder elements, in addition to other Some alloying elements. Why is there so much of the hard alloy grades? How does the tool manufacturer choose the right tool material for a particular cutting process? In order to answer these questions, let us first look at the carbide into a variety of ideal tool material characteristics.

Hardness and toughness

WC-Co cemented carbide has a unique advantage in both hardness and toughness. Tungsten carbide (WC) itself has a high hardness (more than corundum or alumina), and the working temperature increases its hardness is rarely reduced. However, it lacks sufficient toughness, which is essential for cutting tools. In order to take advantage of the high hardness of tungsten carbide and to improve its toughness, tungsten carbide is combined with metal binders so that this material has a hardness that is far more than that of high speed steels and is capable of withstanding in most machining The cutting force. In addition, it can withstand high-speed machining generated by the cutting high temperature.

Today, almost all WC-Co tools and blades are coated, so the role of the matrix material seems to be less important. In practice, however, it is the high elasticity coefficient of the WC-Co material (which measures the stiffness of WC-Co, which is about three times the room temperature elasticity of the WC-Co), which provides a non-deformed substrate for the coating. The WC-Co matrix also provides the required toughness. These properties are the basic properties of the WC-Co material, but can also be in the production of cemented carbide powder, by adjusting the material composition and microstructure and custom material properties. Therefore, the tool performance and the suitability of a particular process depend to a large extent on the initial milling process.

Milling process

The tungsten carbide powder is obtained by carburizing a tungsten (W) powder. The characteristics of the tungsten carbide powder (especially its particle size) are mainly determined by the particle size of the raw material tungsten powder and the temperature and time of carburization. Chemical control is also critical and the carbon content must be kept constant (close to a theoretical ratio of 6.13%). In order to control the particle size by subsequent processes, a small amount of vanadium and / or chromium may be added before the carburizing treatment. Different downstream process conditions and different final processing applications require a combination of specific tungsten carbide particle size, carbon content, vanadium content and chromium content, which can produce a variety of different tungsten carbide powders by varying these combinations. For example, ATI Alldyne, a manufacturer of tungsten carbide powder, produces 23 standard grades of tungsten carbide powder, and tailor-made tungsten carbide powder based on user requirements can reach more than five times the standard grade tungsten carbide powder.

When the tungsten carbide powder is mixed with a metal binder to produce a grade of cemented carbide powder, a variety of combinations can be used. The most commonly used cobalt content of 3% -25% (weight ratio), and the need to enhance the corrosion of the tool in the case of the need to add nickel and chromium. In addition, it is also possible to further improve the metal binder by adding other alloy components. For example, the addition of ruthenium to the WC-Co cemented carbide significantly improves its toughness without reducing its hardness. Increasing the amount of binder can also improve the toughness of the cemented carbide, but it reduces its hardness.

Reducing the size of the tungsten carbide particles can increase the hardness of the material, but in the sintering process, the particle size of tungsten carbide must remain constant. At the time of sintering, the tungsten carbide particles are combined and grown by dissolving the re-precipitation process. In the actual sintering process, in order to form a completely dense material, the metal binder to become liquid (known as liquid phase sintering). The growth rate of tungsten carbide particles can be controlled by adding other transition metal carbides, including vanadium carbide (VC), chromium carbide (Cr3C2), titanium carbide (TiC), tantalum carbide (TaC) and niobium carbide (NbC). These metal carbides are usually added when the tungsten carbide powder is mixed with the metal binder, although vanadium carbide and chromium carbide can also be formed when carburizing the tungsten carbide powder.

The use of recycled waste carbide materials can also produce grades of tungsten carbide powder. Recycling and reusing of used cemented carbide has a long history in the cemented carbide industry and is an important part of the industry's entire economy chain. It helps to reduce material costs, conserve natural resources and avoid unnecessary waste Harm disposal. Waste cemented carbide can generally be reused by APT (Ammonium Paratungstate) process, zinc recovery process or by pulverization. These "regenerated" tungsten carbide powders generally have better, predictable densities because their surface area is smaller than the tungsten carbide powder produced directly by the tungsten carburizing process.

The processing conditions for the mixing of the tungsten carbide powder and the metal binder are also critical process parameters. The two most common milling techniques are ball milling and ultrafine grinding. Both of these processes allow the milled powder to be mixed evenly and reduce the particle size. In order to allow the workpiece to be pressed in the future to have sufficient strength to maintain the shape of the workpiece and to enable the operator or the robot to pick up the workpiece to operate, it is usually necessary to add an organic binder during milling. The chemical composition of this binder can affect the density and strength of the workpiece. In order to facilitate the operation, it is preferable to add a high-strength binder, but this will result in a lower packing density and may cause lumps, resulting in defects in the final product.

After the milling is completed, the powder is usually spray dried to produce a free-flowing mass agglomerated together by an organic binder. By adjusting the composition of the organic binder, the flowability and charge density of these agglomerates can be tailored as desired. By screening coarse or finer particles, it is also possible to further customize the particle size distribution of the agglomerates to ensure that they have good fluidity when they are loaded into the mold cavity.

Workpiece manufacturing

Carbide workpieces can be molded using a variety of process methods. According to the size of the workpiece, the shape of the complex level and production volume, most of the cutting blade are using the top pressure and under pressure rigid mold molding. At each press, in order to maintain the consistency of the weight and size of the workpiece, it is necessary to ensure that the amount of powder (mass and volume) flowing into the mold cavity is exactly the same. The flowability of the powder is mainly controlled by the size distribution of the agglomerates and the properties of the organic binder. Molded parts (or "blanks") can be formed by applying a molding pressure of 10-80 ksi (1000 psig) on ​​the powder loaded into the mold cavity.

Even at very high molding pressures, hard tungsten carbide particles are not deformed or broken, and the organic binder is pressed into the gap between the tungsten carbide particles, thereby acting as a fixed particle position. The higher the pressure, the closer the tungsten carbide particles are, the greater the pressing density of the workpiece. The molding characteristics of grades of cemented carbide powders may vary, depending on the content of the metal binder, the size and shape of the tungsten carbide particles, the degree of agglomeration, and the composition and addition of the organic binder. In order to provide quantitative information on the characteristics of the grades of cemented carbide powder, the corresponding relationship between the molding density and the molding pressure is usually designed by the powder producer. This information ensures that the supplied powder is in agreement with the tool manufacturer's molding process.

Large-sized cemented carbide workpieces or hard alloy wafers with high aspect ratios (such as end mills and drill bits) are usually manufactured in a flexible bag with a flattened grade cemented carbide powder. Although the production cycle of the equalization method is longer than that of the molding method, the tool manufacturing cost is low, so the method is more suitable for small batch production.

This method is to put the powder into the bag and seal the bag, then place the bag filled with powder in a chamber and press it at 30-60ksi pressure by the hydraulic device. The pressed workpiece is usually machined to a specific geometry before sintering. The size of the bag is increased to accommodate the shrinkage of the workpiece during the pressing process and to provide sufficient margin for the grinding process. Since the workpieces are to be processed after the press molding, the requirements for the consistency of the load are not as stringent as the molding method, but it is still desirable to ensure that the amount of powder per bag is the same. If the powder material density is too small, it may lead to the lack of powder into the bag, resulting in the workpiece size is too small and have to scrapped. If the powder material density is too large, too much powder into the bag, the workpiece in the press after molding need to remove more powder. Although the removal of excess powder and scrap of the workpiece can be recycled, but this will, after all, reduce production efficiency.

Carbide workpieces can also be molded using extrusion or injection molds. The extrusion process is more suitable for mass production of axially symmetrical shaped workpieces, and injection molding processes are often used for mass production of complex shapes. In these two molding processes, the grade cemented carbide powder is suspended in the organic binder, and the binder imparts uniformity to the cemented carbide mixture as toothpaste. The mixture is then extruded through a hole or molded into a mold cavity. The grade of the cemented carbide powder determines the optimum ratio of the powder and binder in the mixture and has an important effect on the flow of the mixture through the extrusion or injection cavity.

When the workpiece is molded by molding, equilibration pressing, extrusion or injection molding, it is necessary to remove the organic binder from the workpiece before the final sintering stage. Sintering can remove the pores in the workpiece, making it completely (or substantially) dense. At the time of sintering, the metal binder in the press-formed workpiece becomes liquid, but the workpiece is still able to retain its shape under the combined action of the capillary force and the particle.

After sintering, the geometry of the workpiece remains the same, but the size is reduced. In order to obtain the required workpiece size after sintering, the shrinkage should be taken into account when designing the tool. When designing carbide grades for grades for each tool, it is necessary to ensure that it has the correct shrinkage when pressed under proper pressure.

In almost all cases, it is necessary to treat the sintered workpiece after sintering. The most basic way to treat carbide cutting tool is the cutting edge. Many knives need to grind their geometrical shapes and sizes after sintering. Some tools need to grind the top and bottom; other tools require peripheral grinding (with or without sharpening). Grinding all the carbide grinding debris can be recycled.

Workpiece coating

In many cases, the finished workpiece needs to be coated. The coating provides lubricity and increased hardness, as well as providing a barrier to the substrate to prevent oxidation when exposed to high temperatures. Carbide substrates are critical to the performance of the coating. In addition to customizing the main properties of the matrix powder, the surface properties of the substrate can be customized by chemical selection and by changing the sintering method. Through the migration of cobalt, in the blade surface of the outermost layer of 20-30μm thickness enrichment relative to the rest of the workpiece more cobalt, which gives the substrate surface better toughness, it has a strong resistance to deformation.

Tool manufacturers based on their own manufacturing processes (such as dewaxing method, heating speed, sintering time, temperature and carburizing voltage), may be used on the grade of cemented carbide powder made some special requirements. Some tool manufacturers may be sintering the workpiece in a vacuum furnace, while others may use a hot isostatic pressing (HIP) sintering furnace that pressurizes the workpiece at the end of the process cycle to eliminate any residue Porosity). The workpiece sintered in a vacuum furnace may also need to be subjected to hot isostatic pressing by means of additional processes to increase the workpiece density. Some tool manufacturers may use a higher vacuum sintering temperature to increase the sintered density with a lower cobalt content mixture, but this method may make its microstructure become **. In order to maintain a small grain size, you can use tungsten carbide particles smaller size of the powder. In order to match the specific production equipment, dewaxing conditions and carburizing voltage on the carbide content of carbon in the high and low also have different requirements.

All of these factors will have a crucial impact on the microstructure and material properties of the sintered cemented carbide tool, so there is a need for close communication between the tool manufacturer and the powder supplier to ensure that the tool The production of custom craft grade carbide powder. Therefore, there are hundreds of different grades of cemented carbide powder is not surprising. For example, ATI Alldyne produces more than 600 different grades of powder, each of which is specifically designed for the target user and for specific purposes.

Grade classification

Different types of tungsten carbide powder, the composition of the mixture and the amount of metal binder, grain growth inhibitor type and dosage of the combination of changes, constitute a variety of carbide grades. These parameters will determine the microstructure and properties of the cemented carbide. Some specific combinations of performance have become the first choice for some specific processing purposes, so that the classification of a variety of carbide grades have a meaning.

Two of the most commonly used, for the processing of carbide classification system were C grade system and ISO grade system. Although both systems do not fully reflect the material properties that affect the choice of carbide grades, they provide a starting point for discussion. For each classification, many manufacturers have their own special grades, which produced a variety of various, all kinds of carbide grades.

Carbide grades can also be sorted by composition. Tungsten carbide (WC) grades can be divided into three basic types: simple type, microcrystalline and alloy type. Simple grades are mainly composed of tungsten carbide and cobalt binder, but may also contain a small amount of grain growth inhibitor. The microcrystalline grades consist of tungsten carbide and cobalt binders with a few thousandths of vanadium carbide (VC) and / or chromium carbide (Cr3C2), with a grain size of less than 1 m. The alloy grades are made up of tungsten carbide and cobalt binder containing several percent titanium carbide (TiC), tantalum carbide (TaC) and niobium carbide (NbC), which are also known as cubic carbides because of their sintering After the microstructure showed a non-uniform three-phase structure.

(1) simple carbide grades

Simple grades in the C grade system can be divided into C1-C4, in the ISO grade system can be K, N, S and H grades series for classification. Simple grades with intermediate characteristics can be categorized as common grades (eg C2 or K20) for turning, milling, planing and boring; grades with smaller grain size or lower cobalt content and higher hardness grades (Such as C4 or K01); grades with larger grain size or higher cobalt content and good toughness grades can be classified as rough grades (eg C1 or K30).

Knitted with simple grades can be used for cutting cast iron, 200 and 300 series stainless steel, aluminum and other non-ferrous metals, superalloys and hardened steel. Such grades can also be used in non-metallic cutting areas (eg rock and geological drilling tools) with a grain size in the range of 1.5 to 10 μm (or greater) and a cobalt content of 6% to 16%. Another type of non-metallic cutting of pure carbide grades is the manufacture of molds and punches, which typically have a medium grain size and a cobalt content of 16% to 30%.

(2) microcrystalline cemented carbide grades

Such grades usually contain 6% to 15% of cobalt. In the liquid phase sintering, the added vanadium carbide and / or chromium carbide can control the grain growth, so as to obtain grain size less than 1μm fine grain structure. This fine grain grade has a very high hardness and a transverse break strength of more than 500 ksi. The combination of high strength and sufficient toughness allows the tool of this type to have a larger positive rake angle, which can reduce the cutting force and produce thin chips by cutting rather than pushing the metal material.

Through the production of grades of cemented carbide powder in a variety of raw materials for strict quality appraisal, and the sintering process conditions to implement strict control to prevent the formation of material in the microstructure of abnormal large grains, you can get the appropriate The material properties. In order to keep the grain size small and uniform, the recycled regenerated powder can only be used if full control of the raw materials and recovery process and extensive mass inspection can be carried out.

Microcrystalline grades can be classified according to the M grades in the ISO grade system. In addition, other classification methods in the C grade system and ISO grade system are the same as those of the simple grades. Microcrystalline grades can be used to make tools for cutting less soft workpieces because the surface of the tool can be machined very smooth and retains extremely sharp cutting edges.

Microcrystalline tool can also be used to process nickel-based super alloys, because this tool can withstand up to 1200 ℃ cutting temperature. For the processing of superalloys and other special materials, the use of microcrystalline grade tools and ruthenium-based pure grade tools, can simultaneously improve its wear resistance, resistance to deformation and toughness. Microcrystalline grades are also suitable for manufacturing rotary tools (such as drill bits) that produce shear stresses. There is a drill bit made of composite grades of hard alloy, in the same bit of a specific part of the material, cobalt content varies, so according to the processing needs to optimize the hardness and toughness of the drill.

(3) alloy type carbide grade

These grades are mainly used for cutting steel, the cobalt content is usually 5% -10%, grain size range of 0.8-2μm. By adding 4% to 25% of titanium carbide (TiC), the tendency of tungsten carbide (WC) to diffuse to the surface of the steel sheet can be reduced. By adding no more than 25% of tantalum carbide (TaC) and niobium carbide (NbC), can improve the strength of the tool, anti-crescent wear and thermal shock resistance. The addition of such cubic carbides can also improve the hardness of the tool, in the heavy cutting or cutting edge will produce high temperature of other processing, help to avoid hot deformation of the tool. In addition, titanium carbide in the sintering process can provide nucleation position, improve the cubic carbide in the workpiece distribution uniformity.

In general, the alloy grade carbide grades have a hardness range of HRA91-94 and a transverse rupture strength of 150-300 ksi. Compared with the simple grade, the alloy grade wear resistance is poor, and the strength is low, but its resistance to bond wear better performance. Alloy grades in the C grade system can be divided into C5-C8, in the ISO grade system can be P and M grades series for classification. Alloy grades with intermediate characteristics can be classified as common grades (eg C6 or P30) and can be used for turning, tapping, planing and milling. The highest hardness grades can be classified as finishing grades (eg C8 and P01) for finishing and boring. These grades typically have a smaller grain size and a lower cobalt content to achieve the desired hardness and abrasion resistance. However, similar material properties can be obtained by adding more cubic carbides. The best grades of toughness can be classified as rough grades (eg C5 or P50). These grades typically have a medium size particle size and a high cobalt content, and the amount of cubic carbide added is less to achieve the desired toughness by inhibiting crack propagation. In the intermittent turning process, the use of the tool surface with a higher cobalt content of cobalt-rich grades, but also can further improve the cutting performance.

Titanium carbide content is low alloy grades for cutting stainless steel and malleable cast iron, but can also be used for processing non-ferrous metals (such as nickel-based super alloy). These grades have a grain size of typically less than 1 μm and a cobalt content of 8% to 12%. Higher hardness grades (eg M10) can be used for turning malleable cast iron; grades with better toughness (eg M40) can be used for milling and planing steel parts, or for turning stainless steel or superalloys.

Alloy-based carbide grades can also be used for non-metallic cutting applications, mainly for the manufacture of wear-resistant parts. These grades typically have a particle size of 1.2 to 2 μm and a cobalt content of 7% to 10%. In the production of these grades, usually a large proportion of the recovery of raw materials, so wear parts in the application of high cost-effectiveness. Wear-resistant parts need to have good corrosion resistance and high hardness, in the production of such grades, you can add nickel and chromium carbide to obtain these properties.

Technite powder is a key element in order to meet the technical and economic requirements of tool manufacturers. The powder designed for the tool manufacturer's processing equipment and process parameters ensures the performance of the finished workpiece and results in hundreds of carbide grades. The recycling of cemented carbide materials and the ability to work directly with powder suppliers enable tool manufacturers to effectively control their product quality and material costs.

0.001 mm accuracy, the workers Zou Feng boarded the top of CNC machining

46 years old Zou Feng, is a special allowance to enjoy the State Council workers. His hands barely let him board the pinnacle of CNC machining, harvest Jing Chu artisans, missiles, "nursing messenger" honorary title. What is it that is done? The reporter came to his unit, China Aerospace Sanjiang Group Honglin exploration company to visit. Processing thin-walled deep-hole titanium alloy parts, the accuracy of 0.001 mm - he was known as the missile "care envoy" Zou Feng's first-hand skills, is the processing of thin-walled deep-hole titanium alloy parts, the accuracy of 0.001 mm, less than the hair one!

What is the use of high precision? The original, Zou Feng processing of such parts, is to ensure that the rocket and missile engine safe operation of the important components, the high precision requirements, rare in the field of mechanical CNC machining, is recognized at home and abroad processing problems. Especially in the deep hole of the parts of the inner wall processing, processing can not observe the process of cutting parts of the state, are blind processing, as close to the eyes in the thin, such as cicada wing metal carved carved. Previously, the parts processing pass rate of less than 70%, a waste of large. Zou Feng after nearly a year of research, innovative processing methods, to design their own tools, optimize the program, modify the NC program, homemade deep boring tool ... ... finally overcome the problem, so that pass rate increased to 99.5%, the cost of a substantial decline. Thus, he became the chief processor of the part.

Engine is the missile "heart", Zou Feng is the company's processing engine missile engine important safety components of the first person, which is known as the missile "care envoy." Familiar with the more than 27,000 kinds of CNC tool, to understand its performance parameters and processing range - he called carbide tool industry "the most powerful brain", CNC machining to improve efficiency and accuracy, must be selected using the most suitable tool. Zou Feng's second-hand skills, is familiar with more than 27,000 kinds of CNC tool. His brain stores almost all the tool's performance parameters and processing range, called the tool industry "the strongest brain."

The face of processing tasks, he can according to the material properties, quickly match the most appropriate tool. "This is a comb tooth cutter, twist drill, lengthened milling cutter, insert cutter ... ..." In the tool storage room, the usual little Zoufeng familiar, told reporters a variety of tool performance. In recent years, some foreign tool company experts, deserved to ask him to test the knife and to explore the use of related tools and advantages and disadvantages. US Kenner company sent a blade, called it very suitable for stainless steel finishing. Zou Feng carried out the relevant experiment. The results show that this blade for rough processing of titanium alloy, life than other companies to 25 times more than the blade. Prior to this, Kenner did not know that their blades were suitable for processing titanium alloys. Today, Kenner sells this blade as a tool for roughing titanium alloy, defeating a lot of competitors.

He is a "crazy crazy" master, in 1990, Zou Feng graduated from technical school, came to the red forest company. His father is our space engineer, at the beginning of his work told him: "do something to do fine, especially the aerospace products, not to the slightest bit as much as possible." 27 years, Zou Feng has been kept in mind his father told, obsessed In machining. The end of 1997, the company introduced CNC equipment. In the face of the import of machine tools in English manual, technical school graduation in his unyielding spirit, with professional English-Chinese dictionary, every night to learn late at night, and finally mastered the operation of five kinds of numerical control system, became one of the few domestic all-round CNC processing personnel. "He likes to pondering, a bit crazy on the mechanical processing. Asked other things, he was very stiff. Asked to work, he was about to." Zou Feng's lover Zhang Ying said, "1996, the family bought a car, until now he I do not let him open. "In solving the important safety parts of the missile engine processing problems, Zou Feng into the" crazy crazy "state, walking, eating, on the toilet, or even Even sleep, he was thinking, and ultimately the thin-walled deep hole processing problems won.

In 2004, Honglin company received a contingency project, there is a product processing bottlenecks encountered. Zou Feng pondering more than 10 days, has not been resolved. 12 o'clock every night, he suddenly wanted to clear the solution, excited to shout "finally understand!" And his wife awake. The next morning, he went to the company. Noon home to eat, his face finally had a smile. Bao Jianfeng from sharpening out. Now, Zou Feng won a series of honorary title - the National May 1 Labor Medal, the Chinese Skills Award, the national technical experts, Hubei Province, chief technician ... ... he is a workshop master recognized master, but he did not stop, ears Side often sounded his father's advice, the honor into power, to the higher precision of the NC processing to launch the impact!