Sintered bodies and production process thereof

Details Sintered bodies and production process thereof Sintered bodies and production process thereof

1990-07-06

1991-11-26

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75230, 75246, 252 6255, 419 23, 419 36, 419 37, 419 54, 419 57, C22C 2900

Patent

active

050679791

ABSTRACT:
A process is provided for the production of a sintered body. The process includes the following consecutive steps: i) mixing and kneading one or more metal powders and/or one or more alloy powder with a binder into a compound, said metal and alloy powders having an average particle size not greater than 30 .mu.m, ii) injection-molding the compound into a green body; iii) debinding the green body to form a debound body; and iv) subjecting the debound body to a first-stage sintering at 1,050.degree.-1,250.degree. C. in a reduced-pressure atmosphere and then to second-stage sintering at a temperature in a range of 1,100.degree.-400.degree. C. which is higher than that of the first-stage sintering. This process can provide sintered Ti bodies and sintered magnetic bodies of the Fe-Si type, which have a density ratio of at least 95%.

REFERENCES:
patent: 4564407 (1990-10-01), Kiyoto et al.
patent: 4601875 (1986-07-01), Yamamoto et al.
patent: 4797251 (1989-01-01), Sakuramoto et al.

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