Molybdenum News Center

In recent years, powder sintering technique after another. Field activated sintering (FAST) is generated by applying a low voltage (~ 30V) and high current (> 600A) of the electric field during the sintering process, and the DC pulse discharge to achieve the same time, to achieve the electric field activated sintering, to obtain a significant refinement of microstructure , significantly lower the sintering temperature, sintering time is shortened purposes. Selective Laser Sintering (SLS) applications layered manufacturing method, first performed on three-dimensional computer model to meet the needs of CAD and then layered software model stratification, get each cross-section, and then automatic control technology, the laser selectively sintering the computer corresponding to the inner cross section of the part of the powder fraction, tiered sintering. 

 

In theory, these sintering technology has high academic value, but most still in the laboratory stage, can only be used for small quantities of small size sintering molybdenum products, there is a great distance from the applied research industry. Molybdenum sintering technology has some prospect of major industrial application of microwave sintering technology, hot isostatic pressing, spark plasma sintering technology, aluminum thermal technology, following a general introduction of aluminum thermal technology. 

 

Aluminothermic aluminum powder as a reducing agent, at 200 ~ 300 ℃, of calcium molybdate, molybdenum trioxide, molybdenum sulfide, or a low temperature reduction, can be significantly less than the cost of a conventional hydrogen reduction process and to obtain a high productivity of low density of the crude product of molybdenum or molybdenum alloy coating. Meanwhile, the gas at a certain pressure, as the reduction process, the initial sintering of molybdenum powder can be produced, to obtain a lower quality molybdenum blanks. This stock can be used as an alloy additive molybdenum steel and high temperature alloys can also be prepared as electrolytic refining high-purity molybdenum products raw materials. 

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