Development direction of powder metallurgy special sintering technology

The special sintering technology of powder metallurgy is generally defined as the shrinkage of billet or powder with the extension of time in the process of high temperature. At a temperature lower than the melting point, the body or powder becomes a dense polycrystal with increased strength and hardness. This process is called sintering. Sintering, as the most important process in powder metallurgy production, has always been the focus of research on new materials of dahong.

In the process of high temperature, a series of physical and chemical reactions, such as evaporation, dehydration, thermal decomposition, REDOX reaction and phase transition, may occur in the compound composed of metal or non-metal materials. Eutectic, molten and dissolved; Solid opposition and sintering; Crystallization, crystal growth, remaining glass phase solidification and cooling. The main changes in the sintering stage are the size and shape of particles or grains and the size and shape of pores. In the final stage of sintering, the pores will be basically eliminated from the solid powder to form a certain microstructure, thus giving it a certain performance. Generally speaking, traditional sintering includes gas phase sintering, solid phase sintering, liquid phase sintering, reaction (instantaneous) liquid phase sintering and so on. Although some materials can be prepared by sol-gel, chemical vapor deposition (CVD) and physical gas deposition (PVD) at low temperatures, most materials still require high sintering to achieve high densification.

With the rapid development of materials science and technology and the continuous emergence of new special materials, general sintering methods and atmospheric pressure low-temperature sintering, liquid phase sintering and additive assisted sintering have been difficult to adapt to the needs, so special sintering technology emerged. Metal powder injection molding factory, the sintering method, according to the sintering mechanism and characteristic of special sintering technology from traditional pressureless sintering, hot-pressing sintering, liquid phase sintering and reaction sintering to hot isostatic pressing sintering, high temperature combustion tendril knot, super solid phase line liquid phase sintering (SLPS), selective laser sintering (SLS), the discharge plasma sintering (SPS) sintering, microwave sintering (WS), explosion (ES), casting sintering (CST), electric field activated sintering (FAST), atmospheric pressure consolidation method (CAP), etc., These sintering technologies play an important role in improving the properties of powder metallurgy materials, preparing special materials that are difficult to be produced by conventional sintering methods, increasing production efficiency and reducing costs.

To sum up, MIM technical experts have found that the powder metallurgy special sintering technology is developing towards high densification, high performance, high efficiency, energy saving and environmental protection, and new special sintering technology is being developed and applied continuously. More about metal powder injection molding technology other content, welcome to consult guangdong new material metal powder injection molding MIM technical professional team for your answer!