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Commonly used carbide components
Commonly used carbide to WC as the main component, according to whether the addition of other carbides and divided into the following categories: (1) tungsten cobalt (WC + Co) Carbide (YG) The main component is tungsten carbide (WC) and binder cobalt (Co). Its grades are made up of "YG" ("hard, cobalt") and the average percentage of cobalt. For example, YG8, tungsten-cobalt-based cemented carbide with an average WCo = 8% and the rest tungsten carbide. It is composed of WC and Co, has a high bending strength toughness, good thermal conductivity, but the heat resistance and wear resistance is poor, mainly used for processing cast iron and nonferrous metals. Fine grain of YG type cemented carbide (such as YG3X, YG6X), in the same amount of cobalt, the hardness of wear resistance than YG3, YG6 high, slightly less strength and toughness, suitable for processing hard cast iron, austenitic stainless steel , Heat-resistant alloy, hard bronze and so on.
(2) tungsten titanium cobalt (WC + TiC + Co) Carbide (YT) The main components are tungsten carbide, titanium carbide (TiC) and cobalt. Its grades are composed of "YT" ("hard and titanium") and the average content of titanium carbide. For example, YT15, said the average WTi = 15%, the rest is tungsten carbide and cobalt content of tungsten titanium cobalt carbide. Because TiC hardness and melting point are higher than WC, so compared with YG, its hardness, wear resistance, red hardness increases, high bonding temperature, strong antioxidant capacity, and at high temperatures will produce TiO 2, can reduce Bonding. But the thermal conductivity is poor, low bending strength, so it is suitable for processing steel and other tough materials.
(3) tungsten tantalum cobalt (WC + TaC + Co) Cemented Carbide (YA) Add TaC (NbC) on the basis of YG Carbide to improve the room temperature, high temperature hardness and strength, thermal shock resistance and resistance Grinding, can be used to process cast iron and stainless steel.
(4) Tungsten tantalum and cobalt (WC + TiC + TaC + Co) Carbide (YW) The main components are tungsten carbide, titanium carbide, tantalum carbide (or niobium carbide) and cobalt. This type of cemented carbide, also known as universal hard alloy or universal cemented carbide. Its grades by the "YW" ("hard", "million" word Chinese phonetic characters) plus sequence number, such as YW1. TaC (NbC) is added on the basis of YT-based cemented carbide to improve bending strength, impact toughness, high temperature hardness, antioxidant capacity and abrasion resistance. Can be processed steel, but also processing cast iron and non-ferrous metals. So often referred to as universal cemented carbide (also known as universal cemented carbide). At present mainly used for processing heat-resistant steel, high manganese steel, stainless steel and other difficult processing materials. Category Grade Chemical composition W /% Performance Scope WC TiC TaC Co Tungsten and cobalt alloy YG3X 96.5-0.5 3 Suitable for fine boring and finishing of cast iron, nonferrous metal and its alloys, etc. It can also be used for alloy steel, hardened steel and Tungsten and molybdenum materials, the higher the content of tungsten carbide, the higher the binder content, the hardness is higher, the bending strength is lower; therefore, YG3 is suitable for finishing; otherwise YG15 can withstand greater impact Load, suitable for roughing. YG6 94.0 - - 6 Suitable for roughing of cast iron, nonferrous metals and their alloys, semi-metallic materials for continuous cutting, semi-finished grinding at intermittent cutting, fine yarn YG8C 92.0 - - 8 Suitable for impact rotary rock drill chiseled hard rock Stamping die, planer and cutter etc. YG15 85 - - 15 suitable for impact rotary rock drill chisel hard, extremely hard rock, at greater stress Under the work of the perforation and stamping tools tungsten titanium alloy YT5 85 5 - 10 for carbon steel, alloy steel, forgings, stamping parts, casting the skin processing, uneven sections, intermittent cutting rough car, rough planing, semi-fine plane. Rough milling, drilling and other titanium carbide, to improve the hardness and heat resistance.
The more titanium carbide, cobalt less, then the hardness of the alloy, wear resistance and heat resistance is better, and the better the bending strength. So YT30 for finishing, and YT15 for roughing. YT15 79 15 - 6 Suitable for carbon steel. Alloy steel continuous cutting semi-fine car, fine car, intermittent cutting small cross-section finishing, continuous surface semi-fine milling, fine milling, hole fine expansion, coarse expansion YT30 66 30 - 4 for carbon steel, alloy steel finishing Such as small cross-section fine car, fine boring, precision expansion and other general alloy YW1 84 ~ 85 6 3 ~ 4 6 suitable for heat-resistant steel, high manganese steel, stainless steel and other difficult to process steel finishing, and general steel, The finishing of non-ferrous metals is added to tantalum carbide, which significantly improves the hardness, abrasion resistance, heat resistance and oxidation resistance of the alloy. Can be cast iron, heat-resistant steel, high manganese steel, advanced alloy steel and other difficult to process materials and non-ferrous metals. YW2 82 ~ 83 6 3 ~ 4 8 Suitable for semi-finishing of refractory steel such as heat-resistant steel, high manganese steel, stainless steel, advanced alloy steel, and semi-finishing of general steel, ordinary cast iron and non-ferrous metal (5) steel The properties of the cemented carbide are between high speed steel and cemented carbide. It is based on one or several carbides (such as TiC and WC) for the hardened phase, carbon steel or alloy steel (such as high speed steel, chromium molybdenum steel, etc.) as a binder binder, by ingredients, mixing, Sintered powder metallurgy material. After annealing, can be cut; after quenching and tempering, the equivalent of hard alloy high hardness and high wear resistance; also forging and welding, and heat, corrosion resistance, oxidation and other characteristics. Suitable for the manufacture of various shapes of complex tools, such as twist drill, milling cutter, etc., can also be manufactured at higher temperatures working with mold and wear parts.
Monel Alloy Overview
Monel alloy, also known as nickel alloy, is a metal nickel as the matrix to add copper, iron, manganese and other elements from the alloy. Monel alloy corrosion resistance is good, silver-white, suitable for edge silk material. The use of Monel alloy Monel 400 alloy organization for the high-strength single-phase solid solution, it is a maximum amount, the most versatile, excellent performance excellent corrosion resistance alloy. This alloy in hydrofluoric acid and fluorine gas medium has excellent corrosion resistance, the hot concentrated lye also has excellent corrosion resistance. At the same time also resistant to neutral solution, water, sea water, the atmosphere, organic compounds Of corrosion. An important feature of the alloy is that it does not generally produce stress corrosion cracking, and the cutting performance is good. The alloy is mainly used for stem, pump shaft and impeller, conveyor scraper, oil well drilling ring, elastic parts, valve pads and so on. Corrosion resistance The alloy has excellent corrosion resistance in fluorine, hydrochloric acid, sulfuric acid, hydrofluoric acid and their derivatives. Acid medium: M400 in the concentration of less than 85% of the sulfuric acid are corrosion resistant. M400 is one of the few important materials in hydrofluoric acid. Water corrosion: M400 alloy in most water corrosion conditions, not only excellent corrosion resistance, and pitting corrosion, stress corrosion, etc. rarely found corrosion rate of less than 0.025mm / a high temperature corrosion: M400 continuous working in the air the maximum temperature Generally around 600 ℃, in high temperature steam, the corrosion rate is less than 0.026mm / a. Ammonia: As the Monel 400 alloy nickel content is high, it can be resistant to 585 ℃ below the ammonia and ammonia under the conditions of corrosion. The same time as the above- Generally, the corrosion resistance of Monel K500 is basically the same as that of Monel 400, so the corrosion resistance data of Monel 400 can be applied to Monel K500 alloy. Due to the low corrosion rate of the alloy in flowing seawater and the high strength of the alloy, the alloy is particularly suitable for the manufacture of centrifugal pump shafts resistant to seawater corrosion.
Large Tungsten Carbide Plant Upgrades
Fujian, Sichuan and other famous tungsten carbide factory began to suspend the offer. Guangdong, a large tungsten carbide enterprises offer 185 yuan / kg, Jiangxi, a large tungsten carbide enterprises offer 183 yuan / kg. Individual medium-sized powder enterprises have to stop the phenomenon of the offer.
In addition, affected by multiple factors, tungsten prices recently jumped rhythm, especially the price of tungsten raw materials, in the overall market sentiment, tungsten raw materials supply tension. Since the end of the Spring Festival holiday, the tungsten mine in the trade market has a slow pace of production, which directly affects the production of smelters, and even individual smelters in the case of tungsten sand shortage, in order to maintain production, take the market by tungsten sand way to maintain production.
Analysis of the current price increases, comprehensive analysis, mainly in the following factors:
First, tungsten raw materials supply, and short-term can not return to normal, inversely proportional to the purchase amount.
Second, Tungsten City, a large number of trade funds in the positive access to stimulate market demand.
Third, the end product, carbide prices by the excretion of cobalt metal has begun to adjust prices, tungsten prices by cobalt prices rose trend.
Fourth, the majority of tungsten enterprises is expected to take a positive attitude towards the market.
SMM forecast, tungsten prices rose trend has been formed, multiple factors were good tungsten city, although the overall supply and demand did not occur in the order of magnitude changes, but in the metal market to pick up, raw material rose sharply, tungsten prices rise justified, the current Tungsten prices exist less trade risk.
Diamond Quantum Probes: New Tool for Molecular Spin Detection of Molecular Materials
Recently, the University of Melbourne research team proposed a non-invasive molecular nuclear spin detection method for new materials and biotechnology field provides a new scientific tool.
Many studies in the field of medicine and biology usually require nuclear magnetic resonance (NMR) spectroscopy, but the problem of spatial resolution has always been a technical bottleneck, and NMR spectroscopy usually requires a strong microwave electric field. In response to these questions, the research team led by Professor Lloyd Hollenberg of the University of Melbourne has proposed a new method of performing nanoscale microwave-free NMR operation with quantum probes. The study was published in the journal Nature Communications.
Hollenberg, director of the Center for Quantum Computing and Communication Technology at the University of Melbourne (CQC2T), introduced that the new quantum probe can be used for NMR testing of micro-specimens, which can not be achieved by conventional machines; and that the new quantum probe technology Without the application of microwave electric field, thus avoiding the microwave electric field on the decomposition of biological samples caused by damage.
The purpose of NMR is to detect the magnetic signals of the nuclei of the constituent molecules; however, the signals from the nuclear spin are very weak, and the traditional NMR machines require millions of nuclear spins to detect the signal.
But the use of diamond defects developed by the quantum probe only need thousands of spin, you can easily detect the signal from the nuclear spin.
Alastair Stacey, a postdoctoral researcher at CQC2T, says the problem with the large NMR machines currently used is that the detection signal is very weak and that the distance between the detection target and the measurement equipment is too large. This will lead to two problems: First, the machine can only detect a larger molecule, greatly reduce the measurement accuracy. Second, the need to use a strong microwave and magnetic field to contact the sample, these invasive means will.
Carbide Drawing Die
Tungsten carbide wire drawing dies carbide mold parts of the high quality inspection technology: With the carbide mold parts manufacturing industry development, mold measurement technology development is also followed. Different measurement techniques and different measuring equipment according to the different characteristics of mold manufacturing came into being. From the early design of the mold involved in the digital mapping, to the mold processing process measurement, repair mold measurement, Shaoxing carbide test die to the mold acceptance measurement and the latter part of the mold repair measurement; from small electronic mold to the automotive large mold And the aerospace industry, large-scale mold measurement, high-precision measurement equipment everywhere in the mold parts quality testing equipment used not only includes the classic fixed high-precision coordinate measuring machine, and because of the characteristics of mold manufacturing, a variety of suitable for the scene On-line measurement equipment such as portable joint arm measuring machine, high efficiency white light measuring machine, large-size laser tracker and other measuring equipment are also debut, and through contact and non-contact measurement, image and laser scanning and photogrammetry and other exploration technology to meet Mold product testing needs. A typical mold business, in addition to the production and manufacture of molds, will also involve some gage, fixture and general machine parts manufacturing. In this case, the high precision, strong function, good versatility of the fixed measuring machine has become the majority of mold quality inspection of the preferred part of the classic measurement equipment.
Carbide mold parts of the measurement requirements usually include the control surface of the specified point measurement, Shaoxing carbide cutting die assembly and positioning of the hole diameter and position measurement, often also require measurement type, profile line profile. At this point, the fixed measuring machine of high precision, automation and point-to-point contact measurement capability is very applicable. If you want to mold the workpiece directly with the CAD model on the surface of the point cloud match or metal mold parts of the mapping, fixed measuring machine can also use the contact continuous scanning probe or non-contact laser scanning probe, to achieve high Efficiency, high density point cloud scanning measurements. It is important to note that the accuracy of the contact measurement is usually better than that of the non-contact measurement because of the difference between the measurement structure and the measurement principle.
Carbide Drawing Die for Carbide Mold Production Equipment Carbon Tube Furnace Performance: Carbide Mold Production Equipment Carbon Tube Furnace is what? What performance and high precision molds together to understand the next bar! Carbon tube for the horizontal boat type furnace, is the traditional carbon furnace furnace, round furnace tube, direct heating type, a temperature zone, the furnace temperature up to 2400 ° C, the furnace has a boat and push the boat body And the furnace at the end of a cooling tube, the conductive system is set in a graphite tube on a graphite cone, and then installed on top of it a Shaoxing Carbide drawing die copper sets of joints, the current from the conductive plate to the copper fittings, joints must be with the whole Furnace shell insulation, graphite tube electric furnace has the advantages of simple structure, heating speed, high working temperature, the disadvantage is the furnace tube is thick and short, the resistance is very small, the need for high current, low voltage transformer, furnace easy oxidation, Often to repair furnace.