What is the process of copper-based powder metallurgy?


  copper-based powder metallurgyIt is an industrial development technology for manufacturing and metal powder or other metal powder (or a mixture of metal powder and non-metal powder) as raw materials, after a molding and sintering, manufacturing process of metal structural materials, composite building materials and many different types of products. Copper-based powder metallurgy technology is widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industry, and has become one of the dynamic fields in new materials science. Copper-based powder metallurgy technology has considerable energy saving, saving, performance, product accuracy, stability and other advantages, suitable for large-scale production. In addition, materials and complex parts that cannot be prepared by traditional Chinese casting methods and processing methods can also be manufactured by powder metallurgy enterprise technology development, so they have attracted the attention of the industry.


The extensive copper-based powder metallurgy industry includes iron ore tools, hard metals, magnetic materials, powder metallurgy products, etc. The narrow powder metallurgy product industry refers to powder metallurgy products, powder metallurgy parts (most), oil bearings, metal injection molding products, etc.


The basic process of copper-based powder metallurgy process is as follows:


1. Manufacture of copper-based powder metallurgy raw material powder. The traditional crushing method can be roughly divided into two categories: mechanical method and physical chemical method. Mechanical methods can be divided into mechanical crushing and atomization methods. Physical and chemical methods can be divided into different electrochemical analysis corrosion methods, reduction methods, chemical methods, reduction-chemical methods, vapor deposition methods, liquid phase deposition methods, electrolysis methods, etc. Among them, the reduction method, the atomization method and the electrolysis method can be widely used.

       铜基粉末冶金

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


3. Sintering of copper-based powder metallurgy billets. Sintering is the core process of powder metallurgy process. The formed pressure blank is sintered to obtain the required physical and mechanical properties. Judgments are divided into unit system awards and pluralistic system awards. The sintering temperature is below the melting point of the metals and alloys used for cell and multi-component solid phase sintering. For the liquid phase sintering of a multi-component system, the temperature during the sintering process is generally lower than the melting point of the insoluble component and higher than the melting point of the easily soluble component. In addition to general sintering, there are special sintering processes such as invoice sintering, soaking, and hot pressing.


4. Post-treatment of copper-based powder metallurgy products. Sintering post-processing can be based on enterprise product design requirements we take a variety of teaching methods. 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 sintering of powder metallurgy materials, and have achieved ideal results.


  copper-based powder metallurgy: The general term for all properties of the powder. These include the geometric properties of the powder (particle size, surface ratio, pore size, shape, etc.). The chemical and technical properties of the powder (chemical composition, purity, oxygen content, acid insolubility, etc.); The mechanical product characteristics of the powder (density of loose materials, fluidity, formability, compressibility, packing angle, shear angle, etc.) The physical and surface quality characteristics of the powder (true density, gloss, absorbability, surface activity, potential and magnetism, etc.). The properties of powder often determine the performance of powder metallurgy products to a large extent.


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