Mixed powder for powder metallurgy

Abstract

The present invention provides a mixed powder for powder metallurgy having excellent green compact strength and extractability. The mixed powder for powder metallurgy contains iron-based powder and copolyamide, the amount of the copolyamide is 0.3-2.0 parts by mass relative to 100 parts by mass of the iron-based powder, and the melting point is 80-120°C.

Description

technical field [0001] The present invention relates to a mixed powder for powder metallurgy, and in particular to a mixed powder for powder metallurgy which is excellent in extractability and strength of a green compact when press-molded to form a compact. powder. Background technique [0002] Powder metallurgy is a technique for producing sintered parts such as mechanical parts by sintering the green compact after press-molding mixed powder containing iron-based powder and the like to obtain a green compact. In recent years, due to the advancement of powder metallurgy technology, complex-shaped sintered parts can be manufactured into near-net shapes with high dimensional accuracy, and powder metallurgy technology is being used in the manufacture of products in various fields. [0003] However, for sintered parts, when extremely strict dimensional accuracy is required, or when a horizontal hole shape, an undercut shape, or other highly complicated shapes are required, post...

AI Technical Summary

Problems solved by technology

However, in general, green compacts before sintering are often brittle and have insufficient workability

That is, the green compact before sintering cannot withstand the stress applied to the jig during green processing or during cutting, and is easily damaged.

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