Process for producing stainless steels for spring having a high strength and an excellent fatigue resistance
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 5, 1981
Grant Date -
N/A
app pub date -
Aug 23, 1979
filing date -
Aug 23, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Stainless steels for springs having a high strength and an excellent fatigue resistance are produced by heat treating austenitic stainless steels having such a composition that austenite stability index, Md.sub.30. is 0.degree. C. to +80.degree. C. at a final annealing temperature of 750.degree.-1,150.degree. C., subjecting the thus treated steels to a primary working at a temperature from Md.sub.30 to 500.degree. C. at a reduction rate of not less than 20% and then subjecting said steels to a secondary working at a temperature lower than Md.sub.30 at a reduction rate of not less than 30%.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully