What is the process of cemented carbide powder metallurgy?


  cemented carbide powder metallurgyIt is an industrial technology for manufacturing metal powder or metal powder (or a mixture of metal powder and non-metallic powder) as raw material, forming and manufacturing metal materials, composite materials and various types. Cemented carbide powder metallurgy technology is widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information, nuclear industry and other fields, and has become one of the dynamic fields in new material science. Cemented carbide powder metallurgy technology has considerable energy saving, saving, characteristics, precision, stability and other advantages, suitable for large-scale production. In addition, materials and complex parts that cannot be prepared by traditional casting and processing parties can also be manufactured by powder metallurgy techniques, and therefore have received attention from the industry.


Generalized cemented carbide powder metallurgy industry, including iron tools, cemented carbide, magnetic materials, powder metallurgy. The narrow cemented carbide powder metallurgy industry refers to powder metallurgy, powder metallurgy parts (most), oil bearings, metal injection molding, etc.


The basic process of cemented carbide powder metallurgy process is as follows:

       硬质合金粉末冶金

1. Manufacture of cemented carbide powder metallurgy raw material powder. The traditional crushing square can be roughly divided into two categories: mechanical and physical chemistry. Mechanical can be divided into mechanical crushing and atomization. Physical chemistry is divided into electrochemical corrosion, reduction, chemical, reduction-chemical, gas phase deposition, liquid phase deposition, electrolysis, etc. Among them, reduction, atomization and electrolysis are widely used.


2, hard alloy powder metallurgy with the required shape of the blank forming powder. The purpose of forming is to manufacture a certain shape and size of the blank, so that it has a certain density and strength. The forming method is basically divided into pressure forming and non-pressure forming. Forming is commonly used in press forming. Embryos can also be made using 3D printing technology.


3. Hard alloy powder metallurgy billets. It is the core process of powder metallurgy process. The forming pressure blank passes through to obtain the required physical and mechanical characteristics. Judgments are divided into unit system awards and pluralistic system awards. For solid phases in units and multicomponents, the temperature is below the melting point of the metals and alloys used. In the case of a multicomponent liquid phase, the temperature is generally lower than the melting point of the hardly soluble component and higher than the melting point of the easily soluble component. In addition to general, there are special processes such as invoices, melting and dipping, and hot pressing.


4. After treatment of cemented carbide powder metallurgy. Post-processing can be done in a variety of ways on request. Such as finishing, soaking, processing, heat treatment, electroplating. In addition, in recent years, new processes such as rolling and forging are also suitable for processing after powder metallurgy materials, and have achieved ideal results.


  cemented carbide powder metallurgyThe general term for all characteristics. These include the geometric properties of the powder (particle size, surface ratio, pore size, shape, etc.). Chemical characteristics of the powder (chemical composition, purity, oxygen content, acid insolubility, etc.); mechanical properties of the powder (loose density, fluidity, formability, compressibility, stacking angle, shear angle, etc.) physical and surface properties of the powder (true density, gloss, absorbability, surface activity, potential and magnetic properties, etc.).




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