News & Events

Cemented carbide plate

Hard alloy plate, with good durability and impact resistance, can be used in hardware and standard stamping dies.

Hard alloy since it has high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance, even under the temperature of 500 ℃ is basic remains the same, there are still very high hardness at 1000 ℃. Therefore, it is widely used in machinery. The physical properties of hard alloys are at least three times greater than steel. All kinds of hard alloy plate, hard alloy rod, hard alloy nozzle, hard alloy seal, wear etc. Hard alloy plate is widely used in electronic industry, the motor rotor, stator, LED lead frame, EI silicon steel sheet, etc all carbide pieces must be checked strictly and only those who do not have any damage, such as pore and bubble, crack, etc. Can be shipped.

Hard alloy plate with high hardness, good wear resistance, strength and toughness, heat resistance, corrosion resistance, and a series of excellent performance, especially its high hardness and wear resistance, even temperature from 500 degrees basic remain unchanged. Features of hard alloy plate:

Hard alloy sheet

  • 1: Excellent thermal stability and high temperature resistance.
  • 2: high mechanical temperature at high temperature.
  • 3: good thermal shock resistance.
  • 4: high heat conduction.
  • 5. Excellent oxidation control ability.
  • 6: corrosion resistance at high temperature.
  • 7: excellent anti-corrosive chemicals.
  • 8: high wear resistance.
  • 9: long service life.

Hard alloy plate has high density, high hardness and wear-resisting properties. It is a good material for all kinds of tools. Hard alloy plate is used for the manufacture of various kinds of metal. There is no metal cutting machine, shearing machine, wear-resisting tool, such as knife, etc., it can use electric internal furnace, heating insulation screening. High quality special treatment, hot rolled and cold rolled products can provide tungsten plate, tungsten electrode plate, shield and tungsten boat for electronics, vacuum electronics and lighting, etc.

Hard alloy plate number

  (g/cm3)   (HRA)   (Mpa)



PCBV - CUT blade

1. Overview of pcbv-cut blade:Pcbv-cut blade is a PCB printed circuit board manufacturer specially designed for cutting and processing various materials of PCB board. Pcbv-cut blade has a variety of material, which is divided into welding alloy pcbv-cut blade, integral tungsten steel pcbv-cut blade, PCD diamond pcbv-cut blade, three kinds.

2, A production process, the overall tungsten steel PCBV - CUT blade blank materials production technology ingredients (according to the requirements of applicable selection of tungsten carbide powder + cobalt powder) to the mix - crushing - drying, sieving after forming agent and dry again to sieving mixture system, the mixed system, pressing - molding - Germany import vacuum low pressure sintering furnace and low-pressure sintering sintering after blank to inspection, nondestructive ultrasonic flaw detection, blank dimensions accuracy test. B, the overall tungsten steel PCBV - CUT blade finishing molding process fine grinding slice plane - fine grinding on chip round - knife slices of cylindrical to pour oblique, hobbing and grinding chip groove to chamfer, essence - appearance and dimension accuracy test - the blade edge of commissioning - marking - 100% microscope inspection parts to product packaging. C. PCD diamond pcbv-cut blade production process

Stamping steel blade to detect blade size, acceptance of the blade to qualified blade warehousing, recipients blade and PCD compact (purchased parts storage according to the incoming inspection procedures for implementation) before the blade clamping - grinding blade - processing welding tool to the clamping, high frequency induction brazing PCD compact on the blade to insulation cooling to detect welding, heat treatment, acceptance and fine grinding pieces on both sides of the plane to detect face runout, fine whet knife slices to pour the bevel edge, the cylindrical chamfering - fine (polishing) edge - plating to acceptance, appearance and dimension precision inspection - marking - 100% microscope edge to package the strip - packing - placed certificate, product packaging, packaging inspection to finished product storage.

Iii. Pcbv-cut blade material performance characteristics A, overall tungsten steel pcbv-cut blade performance characteristics 1, cobalt content: 10.0%. 2. Hardness: 92.2 HRA. 2. Density: 14.4 g/cm3. 3. Bending strength: 3300MPa. 4. Grain size: 0.6 um. B. PCD diamond pcbv-cut blade performance characteristics 1, hardness: 8000HV.

2. Thermal conductivity: 700W/mK. 3. Friction coefficient: 0.1 ~ 0.3 (the friction coefficient of hard alloy is 0.4 ~ 1), so the quality PCD cutter can significantly reduce the cutting force. 4. Thermal expansion coefficient: 0.9 x 10-6 ~ 1.18 x 10-6. 5. Flexural strength Mpa: 1500. Four, PCBV - CUT blade features 1, with high precision grinder blade, fine grinding machining accuracy high, smooth finish high mirror effect (Ra 0.012 or higher) sharp edge, not to drop, not to take off the tooth edge, no collapse edge, no phenomenon of advantages. V groove narrow, surface smooth, smooth, without burr, easy to divide. 2. High hardness, sharp edge, good wear resistance and a long working cycle of the machine V-CUT blade life of more than 1.2 times. 3. Optimize the tooth shape design, and the effect of cuttings is more desirable.

5. PCBV-CUT blade product specification serial number outer diameter of the inner diameter x thickness, 1, phi 51.3 x phi 25 x 2.4, 48 teeth, Angle 300,20,200. 2. Phi 51.3 times phi 25x 2.0, 48 teeth, Angle 300,250,200. 3. Phi 51.3 x phi 25 x 2.0, 40 teeth, Angle 300,250,200. 4. Phi 51.3 x phi 25 x 2.4, 40 teeth, Angle 300,250,200. 5. Phi 32 x phi 17.5 x 2.4, 48 teeth, Angle 300,250,200. 6, 28 (phi phi 15 x 2.0, 48 teeth, Angle 300,250,200.

6, 1, PCBV PCBV - CUT blade instructions - CUT overall adopt high quality tungsten steel blade or PCD diamond material is made, due to the tungsten steel with high hardness and brittleness of PCD, the external shocks easy to fracture, especially high quality aluminum board V - CUT the thickness of the blade is thin, is impacted by the external force is more easily broken, so, forbidden knock during installation. 2. Pcbv-cut blade is extremely sharp, please pay special attention to safety when installing, so as not to cause unnecessary personal injury.

3. When the blade is installed, press V groove depth to ask the blade spacing. 4, practical application proved that used in conventional low medium speed of PCB V - CUT (under low speed 6000 r/min, 6000 ~ 6000 r/min) at low speed V - CUT machine is not suitable for aluminum plate, because of the aluminum plate base material is aluminium alloy, aluminium alloy for the fusible metal (aluminum not only low density (20 ℃) (g/cm3) 2.72 ~ 2.82; The melting point is also low, and the melting temperature is 475 ~ 6600C. The cutting tool -- the high temperature of the cutting tool -- the high-speed operation of the pcbv-cut blade is caused by the melting and curling of the cutting surface. Therefore, the v-cut machine of aluminium base plate v-cut is intended to be used for V-CUT machine with more than 8000 ~ 10000 RPM. 5. To better achieve better chip removal efficiency, prolong the service life of pcbv-cut blades, and use alcohol to cool and clean during V groove. 6. The pcbv-cut blade can be repeatedly repaired and repeated, and the number of specific grinding is determined by the use of the blade.

We have been focusing on the r&d and production of high quality tungsten steel, tungsten steel products, we set 60 years military tungsten alloy technology continuously optimize the production process of every detail to provide you with a series of high quality tungsten steel blade of competitive advantage: tungsten steel cutting blade, high quality tungsten steel cutting blade, three hole tungsten steel blade, cutting blades and customized tungsten steel non-standard blades, V - CUT blade, high grade V - CUT blades, tungsten steel V - CUT blade, shenzhen V - CUT, V - CUT knife, high grade V - CUT knife, aluminum board V - CUT blade, high-quality aluminum plate V - CUT blades, tungsten carbide saw blade milling cutter, optical fiber cutting knife, tungsten steel corrugated blades, tungsten steel blade, High quality tungsten steel blade, ultra-thin tungsten steel blade, square tungsten steel blade, grooving machine tungsten steel blade, solid carbide tungsten steel V - CUT knife, wear-resistant tungsten steel blade, PCBV - CUT blades and tungsten steel cutting machine blade, sanxin SZ60 tungsten steel blade, cutting SZ80.5 tungsten steel cutting machine blade, sanxin SZ70 tungsten steel blade, CUT foot machine SZ100 carbide CUT foot machine blade, CUT foot machine blade, high quality blade CUT foot machine, PCB CUT foot machine blade, twin alloy CUT foot machine blade, power board CUT foot machine blade, blade, mitsubishi CUT CUT the feet machine blade, blade and CUT foot machine imported tungsten steel mold, geological mining mining carbide tungsten steel, tungsten steel wear-resisting material, high quality tungsten steel, retail all camp, large amount of the price, some industry special knives in stock for a long time, customer orders can be delivery, welcome new and old customers purchase series tungsten steel products, at the same time, also provide customized all kinds of high quality tungsten steel non-standard parts and tungsten steel non-standard pieces of customized service and customized tungsten steel non-standard blades

What is a Planetary Thread Rolling Dies

broadly divided into two main categories: 1, the head die (main die, line die, scissors, upper thrust, lower thrust, punching sleeve, set, etc.); 2. Rolling board (mechanical teeth rubbing board, self-tapping and rubbing board, etc.).

Divide class

  • 1. Punch die
  • 2. rub silk board Job characteristics Hit the head mould to type the screw directory Work features of screw mould Selection of screw mould
  • 3. process flow Work characteristics of screw mould Screw mould is used to punch the head type of the screw, and then the thread is rubbed from the thread.

Selection of screw mould Heading die material selection is very important, mainly depends on the tungsten steel inside the life, the spring of authentic tungsten steel can effectively ensure longevity, thread rolling plate to have high hardness, wear resistance, enough strength, a certain impact and fatigue resistance stronger work part of 59 ~ 2 HRC hardness, if > 62 HRC is easy to collapse, "59 HRC easy wear and tear; Quenching martensitic body < 3; Work surfaces should not be decarbonized and low hardness; The surface of the friction plate shall not have any defects such as cracks, marks, rust and grinding burns.

Process flow: warm-up - heating - cooling - cleaning - tempering - checking hardness - blackening - appearance inspection.

Cold roll

The use of cold roll

The service life of a cold roll depends not only on the quality of the manufacturing, but also on the maintenance of the process. If used improperly, the effect will be greatly changed. Fatigue spalling is the most common form of failure in rollers. It originates from the fatigue crack in the surface of the roller. If the crack can not be removed thoroughly before the machine is removed, the fatigue extension will be in the hardened layer and the typical fatigue belt will be formed, resulting in fatigue and peeling. Prevention of such accidents should be carried out throughout the roll operation. Users should be aware of the origin and preventive measures of these cracks.

  • 1. Preservation and preheating of rollers The microstructure of roller is very sensitive to sudden change of temperature, so it is advisable to keep the roll in a warm temperature environment, so as to keep the roller clean. A roll can not be suddenly started under a strong load, or a sudden interruption of operation. The reasonable operation is: the roll is running under light load for a period of time, gradually loading up. Roll after no more than 8 0 ° C minor preheating is beneficial, but the process is slow, absolutely forbidden and roll contact with flames of fire.
  • 2. grinding Experienced grinders know that when grinding high hardness rollers, careless operation such as sudden feeding, large quantity of supply, and improper selection of grinding wheel can produce grinding cracks, leading to the peeling of roll.
  • 3. Process hardening In rolling, the contact fatigue stress on the surface of the roller is produced and hardened, and it accumulates and cracks. So you need to grind it regularly to remove the fatigue layer.
  • 4. Rolling accidents Roll surface crack is originated from the surface of the rolling accident damage, such as: skid, overload, sticking steel, broken belt, etc., therefore, in order to the normal operation of rolling mill, and we recommend that users set up strict operating procedures and equipment of rolling procedures.
  • 5. Roller management Users shall establish roll use archives, records in the process of using roll data such as accident, grinding, use the rack, rolling capacity, turns, roll maintenance, etc., so that the evaluation and feedback to the factory joint research, the life of roll.

Cold roll is pulled in cold-rolled industry development and roll manufacturing technology driven forward. From the perspective of the demand of cold rolling industry, increase the wear resistance, roughness keep performance, accident resistance, uniformity and other indicators of the demand is higher and higher, the purpose is to realize the free rolling, rolling high grade plate, reduce roll consumption, etc., in these requirements, under the drive of roll manufacturing companies have been efforts to roll manufacturing technology improvement and innovation. The specific performance as follows:

  • (1) the forged steel roll alloy composition increasing. 5% Cr, 8% Cr, semi high speed steel, high speed steel high alloy steel in the application of cold roll is a trend. Roll material will maintain a diversity at the same time, to adapt to the needs of different rolling conditions.
  • (2) the new roll blank composite application of manufacturing technology. In order to adapt to the roll surface high wear resistance and high comprehensive mechanical performance requirements, have the manufacturer in electroslag smelting, CPC, new type of surface recombination technology such as OSPRAY trial on roll blank preparation.
  • (3) the application of the new roller heat treatment and processing technology. The application of large nc machine, computer automatic control of heating furnace and quenching equipment trial, can increase the manufacturing precision of roll and surface uniformity, adapt to the needs of high-grade rolling mill.

The cold roll manufacturing process can be divided into three stages: the first stage is from 1940 to 1960, when the rolled steel roller is used as cold rolling roller, smelting by arc furnace, without vacuum degassing. The goal of the time was to have uniform hardness of the roll body, which was not catastrophic in the process of roll manufacturing and use. Roll Cr content in the steel is only 1.5% ~ 2.0%, the second stage is from 1960 to 1970, during this time begin to electric slag remelting process manufacturing high quality cold roll, inclusion level improved, roll quality improved obviously. During this period appeared at the same time by using the vacuum degassing method smelting with the process of the steel roll, nondestructive flaw detection method is used to check the roll, the roll breakage and peeling greatly reduce the accident of cold rolled work roll containing 2.5% ~ 3.0% Cr effective hardening layer depth is 15.8 ~ 19 mm. The third stage is from 1980 to 1991, rolling mill, demanding higher quality of cold rolled sheet, thus demanding higher quality of roll, the roll use management level also have improved, greatly reducing the roll spalling.

In the 1970s, induction heating and cold processing technology appeared in roll manufacturing technology, which improved the depth of the roller quenching layer from less than 10mm to about 15mm. After the induction hardening of the cold roll, the surface hardening layer produces residual stress, and the core produces residual tensile stress. Due to the induction heating confined to the surface of a certain depth, roll the internal temperature is still low, so after quenching residual stress produced by a whole quenching residual stress is small, roll don't have to drill the center hole. Because of the various advantages of induction quenching, it rapidly becomes the mainstream technology of cold roll manufacturing. Cold roll in the process of working to bear a lot of rolling stress, coupled with a rolled piece weld, inclusions, the problem such as edge crack, easy to cause instantaneous high temperature, strong thermal shock to work roll, crack, sticky roller, flake or scrapped. Cold roll, therefore, must have the resistance caused by the bending stress, torsion stress, shear stress cracking and spalling of ability, but also has high wear resistance and contact fatigue strength and high fracture toughness and thermal impact strength, etc. So how to improve the service life of roll has been a big problem for roll manufacturing industry.

Domestic and foreign cold-rolled work rolls are generally used in materials such as GCr15, 9Cr2, 9Cr, 9CrV, 9Cr2W, 9Cr2Mo, 60CrMoV, 80CrNi3W, 8CrMoV, 86CrMoV7, Mo3A and Cr5 series. In order to improve the depth of hardening layer and contact fatigue life, reduce the brittleness of the hardening layer and overheating sensitivity, as well as meet the rolling piece on cold rolled work roll mechanics performance and use of performance requirements, further, since the 80 s, foreign roll factory of 5% Cr cold roll steel, the chemical composition of the optimization work, mainly in 5% Cr steel to increase the content of Mo, V or join Ti, Ni and other elements. Add 0.1% 5% Cr steel roll of Ti, Ti in CN compounds (TiCN) fine form precipitate in the matrix, falls off after friction loss TiCN, formed in the roll surface scratches, moderate roughness regeneration. In the actual operation of tinplate rolling mill, it is effective to use roughness to reduce the advantage of small, the high-speed rolling can be realized from the beginning of rolling.

At present, the cold roll material is still in continuous development, some experts scholars believe that cold roll should develop towards high chromium, even high - speed steel and semi-high - speed steel. Because of the increase of chromium content, the depth of the hardened layer increases, and the carbide types in the materials can all be converted into M23C7. The representative countries are mainly British, American, Japan and so on. Part of experts and scholars insist on low chromium roller, adhere to the secondary hardening, the reason is that when the roll surface micro cracks appear, if not in time to remove, as rolling, micro cracks will slowly along the radial and axial extension at the same time, and peeling off occur, serious when the depth of the radial extension to the depth of hardening layer location. If the hardened layer is very deep, the possibility of cracks in the interior is increased when the quenching occurs, so that the spalling will result in the loss and loss.

1.The purpose of the technology of cold roll - rolling The initial rolling process: increase the rolling friction and increase the Angle of bite Intermediate rolling process: improve the friction condition and prevent slip (slide between the plate rolls) to prevent annealing Leveling process: production of stamping surface steel plate

2. The methods and characteristics of the various cold roll rollers The main features of the mahua method are the problems Grinding wheel sanding hard grain furrow effect is easy to process, low cost and less effect, and reduce roll life The roughness of the abrasive particles is random, the surface mechanical deformation strengthens roughness control precision, the associated wave degree, noise dust pollution The cutting effect of edm is better than that of shot blasting The laser mauling pulsed laser rapid melting is good and has the effect of modification. The high energy conversion efficiency of the roughness precision is inferior to that of the electric spark and electron beam Electron-beam pulsed electron beam pulsed fast flocculation has good effect, high machining efficiency, modification and strengthening effect, and high accuracy of roughness requires vacuum conditions

3. Principle of laser roughening of cold roll The surface of the material is used for the discrete degree of the laser pulse point The surface of the material is melted/gasified by photothermal transformation The molten material can be used to build up the concave convex hull microstructure The rapid condensation of melt has the effect of modification Through the tensile stress generated by the molten structure, the stress field of the roller surface can be alleviated, and the fatigue property of roller surface is improved

Four. Effect of laser hair - making: It is better than the shot blasting method in increasing the friction and biting Angle effect. Reduce the vibration of rolling mill, improve the rolling speed, improve the plate shape and the surface quality of the product, and prevent the rolling annealing (cold rolling process). The metal sheet with fine surface quality and good stamping performance, such as different roughness of the wool panel and the forming of good mirror board, etc. (leveling process); Prolong roll use cycle or cycle oversteel; The surface geometry defects of the billet were dispersed to improve the yield.

tungsten carbide roll