Tungsten carbide Punches for Wafios N90 wire nail making
Our dies are available with both brazed and interchangeable tungsten carbide insert . We supply exchangeable inserts both round or square. Round inserts can be supplied with up to three profiles.Punches are manufactured in full tungsten carbide with plain and chequered surface. Other profiled surface can be supplied on requests. Punches are manufactured in full tungsten carbide with plain and chequered surface. Other profiled surface can be supplied on requests.
| Grade | ISO | Density | TRS | Hardness | Performance & Application RecoTungsten Carbide Insert Die for 2.5mm Nail Makingmmend |
| G/Cm3 | N/mm2 | HRA | |||
| YG11C | K40 | 14.35 | 2200 | 87.6 | Forming or stamping dies for metal powders and nonmetal powders |
| YG15C | K40 | 14 | 2500 | 85 | Punching & stamping tools under large stress |
| YG18C | K40 | 13.7 | 2700 | 84.5 | Impact resistance forging dies,hot-press forging dies and rollers |
| YG20 | K40 | 13.5 | 2400 | 83.5 | For various dies made by cold forging,cold stamping and hot forging |
| YG20C | K40 | 13.4 | 2600 | 81-82 | Dies for wear resistance or impact resistant application |
| Carbide production The productionprocess of powder-metallurgical products basically includes the four steps of powder preparation, forming, sintering andfinishing. Tungsten carbide production The 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 under inert atmosphere at high temperatures. The production parameters are decisive for the WC grain size in the sintered carbide. Powder preparation The tungsten carbide is intensely mixed with the binder metal cobalt, nickel or iron, various grain growth inhibitors and materials, which promote compaction, by wet grinding so that a homogeneous suspension is created. Afterwards, the suspension is dried in a spray tower to produce a granulate with good flow characteristics. This granulate represents the basis for all forming processes. Metal forming The objective of the forming process is to obtain a near net shape sample. Pressing is normally carried out at room temperature with pressures reaching up to several tons per square centimetre. There are several ways of pressing blanks: During isostatic cold pressing the powder is filled into an elastic flexible hose and pressed into a compacted form through high liquid pressure. The powder blocks which are produced in this way can then be processed mechanically. All common machining methods like milling, cutting, drilling or turning may be applied. In uniaxial pressing the pressing tool consists of a die and an upper and a lower punch. The carbide powder is filled into the die 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 bar or cylindrical rod, with or without axial hole(s). A plasticiser is added to the powder. The resulting paste is pressed through an extrusion nozzle. Before sintering, the plasticiser must be evaporated in special drying furnaces. Metal Injection Moulding (MIM) is a process used to produce more complex forms which cannot be produced by direct pressing. The paste preparation is similar to the extrusion process. Sintering process The sintering process converts the blank into a homogeneous and dense carbide with a high level of hardness. The material is 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 % during this process. Finishing In order to achieve the final requirements of surface finish, tolerances, etc. carbide parts can be subjected to a series of finishing processes such as grinding, spark erosion and coating. |
Zhuzhou Huijin Cemented carbide Co., Ltd is located in Zhuzhou City, Hunan Province, China, where is the largest tungsten carbide producing area in China. Our main pr-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!
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.