Zhuzhou Huijin Cemented Carbide Co., Ltd.  

Product Name: High Precision Tungsten Carbide Cold Heading Dies Model NO.: D-005 Condition: New Customized: Customized One-time Molding: One-time Molding Forging Work Steps: Automotive Half Shaft Forming Forging Craftwork: The Long Axis Type Material: Tungsten Carbide Application: Household Appliances, Commodity, Hardware, Car Applciation: Fastener Industry Applciation2: to Be Used as Mold to Make Nails Applciation3: Auto Industry Trademark: zzhuijin Transport Package: Cartons or Wooden Cases Specification: tungsten carbide Origin: China HS Code: 8207300090 Product Description Key Specifications/Special Features:Tungsten Carbide Cold Forging DiesOutside diameter, inner diameter, height are all accurate grinding, tolerance can be +0.01mm.The product has very good concentricity, parallelism, perpendicularity.Our advantages: 1. Made by virgin raw material. Our production line is imported, the service life time of product is higher by 120%.-2. Don't crack.3. HIP (Hot Isostatic Press) sintering ensures the stable microstructure, the service life time is longer, die change is less, can improve the working & production efficiency.4. We also supply carbide dies with coarse grain size, which has high impact resistance ability and can be used to make big size carbide dies.The cost is reduced by increasing tool life and productivity is improved.The defect rate is reduced and quality is improved.High fracture toughness----------- lower crack occurrenceHigh strength and hardness-------improved tolerance of coltLow friction coefficient--------------improved surface roughnessTungsten carbide grade selectionIn the standard tungsten carbide cold heading process, tungsten carbide cold heading die need to withstand greater shock, in order to meet the requirements, you must use the tungsten carbide with a higher amount of cobalt-containing, high strength and good toughness. Such as YG15, YG20, YG20C, YG22C,HJ80.1 (GT55).GradesWc%Co%DensityT.R.SHardnessPerformance & application recommended g/cm3MPaHRAYG1189%11%14.4260088.5Forming or stamping dies for metal powders and nonmetal powders.YG1585%15%14280087.5For fabricating drawing dies of steel tubes and rods under high compressibility ratio; punching, stamping, forging tools under large stress.YG2080%20%13.5320085.5For fabricating of stamping dies for watch parts, spring plates of musical instruments, battery jays, small sized steel balls, screws, screw caps.YG16C84%16%13.9290085.5Impact resistance forging dies.YG18C82%18%13.7310084.5Impact resistance forging dies, hot-press forging dies and rollers.YG20C80%20%13.5330083Dies for wear resistant or impact resistant application.YG22C78%22%13.3350082.5Nut forming dies and high impact resistance forging dies.YG25C75%25%13.1360082Stainless bolt header dies and rollers.HJ80.175%25%13.05380083.2It is suitable for screw cap forming dies with high strength (highest impact-resistant forging dies).Also we can produce the carbide die as your required.Carbide productionThe productionprocess of powder-metallurgical products basically includes the four steps of powder preparation, forming, sintering andfinishing.Tungsten carbide productionThe APT (ammonium para-tungstate) is calcined into tungsten oxide under high te-mperature. Subsequently the oxide is reduced to tungsten metal in a hydrogen atmosphere. The metal powder is then mixed with carbon and carburised underinert atmosphere at high temperatures. The production parameters are decisive for the WC grain size in the sintered carbide.Powder preparationThe tungsten carbide is intensely mixed with the binder metalcobalt, nickel or iron, various grain growth inhibitors and materials,which promote compaction, by wet grinding so that ahomogeneous suspension is created. Afterwards, the suspensionis dried in a spray tower to produce a granulate with goodflow characteristics. This granulate represents the basis for allforming processes.metal formingThe objective of the forming process is to obtain a near netshape sample. Pressing is normally carried out at room temperaturewith pressures reaching up to several tons per squarecentimetre.There are several ways of pressing blanks:During isostatic cold pressing the powder is filled into an elasticflexible hose and pressed into a compacted form throughhigh liquid pressure. The powder blocks which are producedin this way can then be processed mechanically. All commonmachining methods like milling, cutting, drilling or turning maybe applied.In uniaxial pressing the pressing tool consists of a die and anupper and a lower punch. The carbide powder is filled into thedie and then compacted to create the so called green carbide,which is ejected from the pressing die.Extrusion pressing is mainly used to produce rectangular baror cylindrical rod, with or without axial hole(s). A plasticiser isadded to the powder. The resulting paste is pressed throughan extrusion nozzle. Before sintering, the plasticiser must beevaporated in special drying furnaces.metal Injection Moulding (MIM) is a process used to producemore complex forms which cannot be produced by directpressing. The paste preparation is similar to the extrusionprocess.Sintering processThe sintering process converts the blank into a homogeneousand dense carbide with a high level of hardness. The materialis sintered at temperatures between 1,300 and 1,500 °C(liquid phase sintering) and sometimes also at high pressure(up to 100 bar). The volume is reduced by up to 50 % duringthis process.FinishingIn order to achieve the final requirements of surface finish, tolerances,etc. carbide parts can be subjected to a series of finishingprocesses such as grinding, spark erosion and coating.Zhuzhou HuijinCemented carbideCo., Ltd is located in Zhuzhou City, Hunan Province, China, where is the largest tungsten carbide producing area in China.Our mainpr-oducts inclue: Tungsten carbide rods, carbide strips, carbide dies and bushes, tungsten carbide roll rings, carbide disc cutters, carbide end mill cutters, carbidestud and pins, tungsten water jet cutters, precision tools, tungsten carbide grits and powder, welding rods, ceramet inserts, PCD and CBN tools, non-standard and deep-processing products and so on. We also provide very good quality of boron carbide, silicon carbide nozzles.Technology and Quality creates a bright future.Looking forward to your cooperation!Our company gathered the professional staff members for designing, producing and saling. Our workers are well trained and experienced. Our team is honest, positive, keeping promise, working hard and carefully. We sincerely hope we can provide our clients with good quality, moderate price together with professional service. We have advanced equipment, test facilities and professional employees. We strictly carry on ISO9001: 2008 requirements to guarantee the quality.