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研究了ＭＩＭ重合金产品在注射、脱脂和烧结３个阶段的变形原因及其解决方法，结果表明：注射时由于成形坯的冷却收缩和合模线的存在使成形坯的形状和大小与模具形腔有差异；粘结剂中聚丙烯质量分数高于３０％时可保证溶剂萃取脱脂时样品不变形；先在１３５０℃进行低温固相烧结，然后在１５３０℃进行高温液相烧结，可较好地消除烧结过程中填料对产品内孔孔径收缩的阻碍作用
The causes and solutions of the deformation of MIM heavy alloy during injection, degreasing and sintering were studied. The results show that the shape and size of the blank are similar to that of the mold cavity There is a difference; when the mass fraction of polypropylene in the binder is higher than 30%, the sample can be guaranteed to be non-deformable when degreased by solvent extraction; solid phase sintering at a low temperature of 1350 ° C and liquid phase sintering at a temperature of 1530 ° C are preferable Elimination of the sintering process of the product of the hole pore size shrinkage impede the role