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Patent Searching and Data


Title:
SURFACE HARDENING METHOD FOR IRON BASE SINTERED BODY
Document Type and Number:
Japanese Patent JPS5576063
Kind Code:
A
Abstract:

PURPOSE: To keep the toughness of sintered body base material of iron base, by subjecting the iron base sintered body contg. previously P to carburizing or carburizing hardening so as to restrict the hardening depth at the surface portion.

CONSTITUTION: Iron base material powder mixed with 0.2W1% by wt. P is formed into a desired shape, it is then sintered in a carburizing gas at a temp., e.g., about 900°C. The sintered body is oil quenched and tempered at a temp., e.g., about 1,000° so as to harden the surface of the iron base sintered body. This method exhibits satisfactory curburization controlling effect even when the sintered body is of comparatively low density, and the increase of P within the above described limit is excellently effective.


Inventors:
HAYASAKA TADAO
Application Number:
JP1978000147814
Publication Date:
June 07, 1980
Filing Date:
December 01, 1978
Export Citation:
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Assignee:
HITACHI FUNMATSU YAKIN KK
International Classes:
B22F3/24; C22C38/00; C23C8/20; C23C8/22; (IPC1-7): B22F3/24; C23C11/12