Cobalt-Chromium Alloy by Mechanical Alloying

  • Cobalt-Chromium Alloy available resistance crucible boiler. In addition induction furnace (power frequency, IF) is also used. The structure of the alloy is much more complicated than the pure metal. Because the alloy consists of two or more elements, the interaction between the elements will form a variety of different phases. We in metals and alloys, where the same chemical composition, the same structure and with other parts of the interface by the uniform component, called the phase.
    Powder Metallurgy Superalloy Prepared by Mechanical Alloying. The function of mechanical alloying (MA) is to fully homogenize the constituent elemental powder and the ultrafine oxide particles by a high-energy ball mill, and to process the metal powder into an alloy powder. MA principle is the deformation of metal powder under mechanical force, broken and repeated cold welding. In the process of MA, oxides and metal powders with higher hardness are continuously kneaded into the soft matrix metal, which is different from the ordinary mixing and is basically not limited by the particle size of the powder.
    Has a high strength, good thermal fatigue resistance, hot corrosion and abrasion resistance, and has good weldability. Suitable for making aviation jet engines, industrial gas turbines, guide vanes and nozzle guide vanes for marine gas turbines, and diesel engine nozzles. First tungsten powder or molybdenum powder pressed into shape, and sintered to a certain porosity of tungsten, molybdenum skeleton, and then infiltration of copper. This method is suitable for low copper content of tungsten copper, molybdenum copper products. Compared with tungsten copper, molybdenum and copper has the advantages of small mass, easy processing, linear expansion coefficient, thermal conductivity and some main mechanical properties and tungsten copper equivalent.
    Therefore, tungsten-copper alloy with low expansion of tungsten, wear resistance, corrosion resistance and have a high copper conductivity and thermal conductivity, and for a variety of machining. Tungsten copper alloy according to user requirements for the ratio of tungsten and copper production and size of the processing. Tungsten copper alloy powder metallurgy process is generally the first powder - mixing ingredients - pressing molding - sintering infiltration. Tungsten Copper is the use of high-purity tungsten powder having excellent characteristics and high-purity copper metal powder plasticity, high conductivity, etc., by isostatic pressing, sintering temperature, melting refined copper infiltration process made of composite material. Arc-breaking performance, conductive thermal conductivity, thermal expansion, high temperature does not soften, high strength, high density, high hardness. Tungsten copper alloy is composed of tungsten and copper alloy is a metal matrix composite material.
    Stellite having a planar fracture stress - temperature relationship, but above 1000 ℃ were shown to have excellent high temperature other than hot corrosion resistance, it may be because the high chrome content alloy, such an alloy which is A feature of WC-Co-based cermet as the earliest study of cermets, due to the high hardness (HRC 80 ~ 92).

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