Manganese and its compounds are commonly raw material for production of metallurgical materials. In 1950, the importance of manganese powder in metallurgical materials was recognized. Since then, manganese powders application in metallurgical industry is gradually expanding. Through the development of master alloy and pre-alloy technology, the metal powder supplier develops a series of high-strength sintered steels. And manganese powder plays an important role in other metallurgical materials as the primary component.
Manganese and silica fume are added in low alloy sintered steel at the same time. They show a good strengthening effect and sintering dimensional stability, cheap, has a strong competitive advantage. Results of iron and sintered steel is mainly used for the manufacture of mechanical parts must be noted that the choice of alloying elements, its dimensional stability. Under normal circumstances, adding silica fume caused the compacts during sintering shrinkage, and by adding manganese will cause compacts expansion. By adding manganese and silica fume, can better control the appearance of the shape and size of the sintered body. Adding manganese and silicon alloying elements in sintered steel, the performance is greatly changed.
Manganese powder is broken by melting completed in accordance with the powder metallurgy process for aluminum alloy. In the when smelting cooling, high cooling rate. Try the injection of manganese added to the aluminum alloy matrix, the results show that the previous methods rely on the heat release by the group element of the reaction between manganese solid solution process does not require additional equipment can be maintained, the whole process of the desired temperature lower; Moreover, the material properties of manganese has little dependence on particle size.
Al-Mn alloy is a common aluminum alloy, two-phase formed by the -solid solution and Al6Mn intermetallic compounds. Influence on the mechanical properties of intermetallic compounds large alloy yield stress and fatigue strength significantly increased with the increase of the compounds, while the elongation decreased (especially in the low-temperature environment). After adding a small amount of chromium alloys, Al-Mn alloy is improved significantly.
Manganese as the main component of metallurgical materials or additives play an important role to improve the material properties and the development of new materials; and manganese resources are rich, low cost. Research and development of manganese, both in the scientific theory or in the production practice, are of great significance. With the expansion of market demand and the development of materials science and technology, the application prospects of manganese will be broader.
However, the expanding application of manganese powder encounters the obstacles. Manganese is easily oxidized and the oxides are difficult to restore. In powder metallurgy production process, the oxidation of manganese powder has been a very difficult problem. With the development of milling and sintering technology, the problem of preventing the oxidation of manganese powder has been eased. But it is not completely resolved. People should not only advocate expanding application of manganese powder, but also strengthen the research in this area. They need to look for reasonable measures.Source:http://www.mhcmp.com
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