Manufacturing method for porous powder sintered body and preloading molded body for manufacturing sintered body

Abstract

The invention discloses a manufacturing method for a porous powder sintered body and a preloading molded body for manufacturing the sintered body. According to the method, the aperture size of the porous powder sintered body can be controlled easily and effectively, and the breakage probability of the molded body during compression molding can be lowered. The method comprises the steps of material preparation, molding and sintering. During material preparation, according to basic raw material powder for manufacturing the porous body, first powder and second powder are used, wherein the first powder and the second powder are different in shape and size, compared with the second powder, the granularity of the first powder is smaller, the compactibility of the first powder during molding is better, and the first powder accounts for 10 percent-90 percent of the total mass of the basic raw material powder. The first powder has the characteristics of being better in compactibility and smaller in sintered aperture size, the second powder has the characteristic of being larger in sintered aperture size, in this way, after the first powder is fully mixed with the second powder, gaps formed in the second powder can be filled with the first powder, on one hand, the effect of controlling the aperture size of the sintered material is achieved, and on the other hand, the compactibility of the mixed powder is improved.

Description

technical field [0001] The invention relates to a method for preparing a powder sintered porous body and a pre-pressed molded body of the sintered body. Background technique [0002] The applicant's current research on powder sintered porous filter materials focuses on the expansion of material application fields, improvement of material performance, exploration of pore-forming mechanism and optimization of preparation process. In the expansion of the application field of sintered porous filter materials, it is boldly proposed to develop corresponding ones that can meet the requirements of chemical stability (such as corrosion resistance) in this application environment and have good filtration performance for some specific and relatively harsh application environments. new material. Its significance is that if this type of new material is successfully developed, it will be able to bring precision filtration technology into the corresponding field, thereby changing the trad...

AI Technical Summary

Problems solved by technology

However, in the development process of new materials, in addition to the research on material composition, many problems in the process of sintering porosity are often faced, such as: sintering densification, material tortuosity after sintering is too large to affect permeability, material pore size hard to control etc.

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