Tungsten-cobalt Alloy Eight-tooth Cutting Disc Metal Injection Molding MIM Parts

Due to the poor cutting performance of cobalt alloys, most parts made of these alloys are produced by precision casting. Powder metallurgy and sintering. Grinding and unconventional machining techniques (EDM, LBM, etc.) are used for machining [2. 3. 4. 5). This leads to low productivity and high manufacturing costs of cobalt alloy components, especially medical implants such as hip joints and dental implants.

Chemical composition and mechanical properties of steel column Tungsten-cobalt alloy is a cobalt-based high-temperature alloy. Cobalt is a tough silver-grey low-permeability metal with a light blue hue. Cobalt appears in the CPH structure below 4210℃ and in the FCC lattice structure above this temperature. Cobalt has a high radioactive Curie point/temperature (1121C) and due to its ductility, it has high damping properties. These properties make cobalt a useful component/inclusion in vibration and high-temperature alloys [2]. 3, 61. Cobalt exists in 26 isotopes from Co-50 to Co-75. Co-59 is the only stable isotope. The magnetic permeability of cobalt is about 2/3 of that of iron. This makes cobalt alloy a non-magnetic biomaterial second only to Ti alloy. The density of cobalt is 8.90 g/cm3 and the atomic mass is 58.9332 amu. The melting point of cobalt is 1495°C 16]. All these properties are conducive to improving the performance of tungsten-chromium-cobalt alloys (Co-allovs). Adding cobalt to metal tool materials helps to reduce the friction coefficient in the cutting zone (interaction between the tool and the workpiece material) and helps to maintain red hardness. Cobalt-based alloys are suitable for application chemical environments that require higher corrosion resistance, wear resistance, high strength at high temperatures and good erosion resistance. Tungsten-chromium-cobalt alloys are also suitable for fields that require high creep resistance, structural stability, heat creep resistance and heat corrosion resistance [2]. 4. 7. 8]. As mentioned above, there are currently two main combinations of tungsten-chromium-cobalt alloys. Co-Cr-W-C combination containing W: such as tungsten-chromium-cobalt alloy 6. Tungsten-chromium-cobalt alloy 12. Stellite 1 and Stellite 190, and Co-Cr-Mo-C combinations containing Mo: such as Stellite 706. Stellite 712. Stellite 701 and Stellite 790 16. 91.

Higher chromium (Cr) content provides Stellite alloys with high corrosion and wear resistance and good magnetic properties at high temperatures. Chromium, as a carbide former, is the most important strengthening element in the alloy matrix. Chromium also provides excellent corrosion and oxidation resistance to the alloy. Tungsten (W) and molybdenum (Mo) are the main elements of Stellite alloys, which can increase the strength of the alloy matrix. Molybdenum helps to increase hardness and form hard and stable carbides in the alloy. Molybdenum itself has the sixth highest melting point (2623°C) among known materials. Tungsten (W) as an alloying element has sufficient toughness and hardness. High density and high red hardness. Carbon provides the alloy with lower electrical conductivity but the highest thermal conductivity. The carbides in tungsten-chromium-cobalt alloy provide high hardness and red hardness for the alloy

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was established in 1997. It is a national high-tech enterprise and a member unit of the National Powder Metallurgy Standardization Committee, an executive director unit of the China Cultural, Educational and Sports Goods Association, a vice president unit of the China Shooting Equipment Professional Committee, a director unit of the Light Weapon Equipment Council, a member unit of the National Powder Metallurgy Standardization Committee, and a member unit of the Injection Molding Committee of the Powder Metallurgy Branch of the China Iron and Steel Association. As of 2020, the company has led and participated in the formulation of 47 national standards, national military standards and non-ferrous metal industry standards. The company has won honors such as the "Technical Standard Excellence Award" issued by the National Nonferrous Metals Standardization Technical Committee for many times.

The company specializes in the research, development, production and sales of injection molding products, powder metallurgy products and high-precision CNC machining products of new materials such as tungsten alloys, tungsten-zirconium alloys, tungsten-copper alloys, stainless steel, iron-based metals, cemented carbides, copper and copper alloys, titanium and titanium alloys, non-metallic energetic materials, special engineering plastics, etc. As of 2020, the company has obtained 42 invention patents and new utility patents.

The company has complete 1S09001-2015 quality system certification, 1S014001-2015 environmental management system certification and automotive 16949 system certification, etc., in the fields of medical equipment, communication equipment, household appliances, optoelectronic equipment, fishing gear and lamps and other civil equipment and instruments,