Steel having excellent vibration attenuation performance and met

Details Steel having excellent vibration attenuation performance and met Steel having excellent vibration attenuation performance and met

1980-12-03

1983-10-18

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 165, 148 39, C21D 118

Patent

active

044103743

ABSTRACT:
Steel having a structure of ferrite and tempered martensite and exhibiting excellent vibration attenuation characteristic is manufactured by the steps of forming a solid solution of steel consisting essentially of 0.02.about.0.016% by weight of carbon; less than 0.6% by weight of silicon; 0.5.about.1.5% by weight of manganese; either one or more of 5.about.15% by weight of chromium and 2.about.9% by weight of tungsten; either one or both of 0.03.about.2% by weight of aluminum and 0.1.about.5% by weight of cobalt; less than 1.5% by weight of copper, if necessary, and the balance of iron; heating and keeping for a desired time period the alloyed steel in a temperature range in which austenite and ferrite coexist; cooling the steel so as to transform austenite to martensite; and tempering the steel at a temprature of from 400.degree. C. to a temperature below a transformation point thus forming a structure of ferrite and martensite. Steel incorporated with copper is suitable for precipitation hardening. Advantageously, the amount of the tempered martensite should be less than 60% by volume.

REFERENCES:
patent: 3619302 (1971-11-01), Aoki et al.
patent: 3655465 (1972-04-01), Snape et al.
patent: 4152177 (1979-05-01), Mantel et al.
patent: 4204888 (1980-05-01), Masumoto et al.

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