The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2006
Filed:
Mar. 22, 2002
Katsuhide Nishio, Amagasaki, JP;
Masahito Sakaki, Amagasaki, JP;
Yoshiyuki Umakoshi, Amagasaki, JP;
Kenji Hara, Amagasaki, JP;
Kouki Tomimura, Shunan, JP;
Katsuhide Nishio, Amagasaki, JP;
Masahito Sakaki, Amagasaki, JP;
Yoshiyuki Umakoshi, Amagasaki, JP;
Kenji Hara, Amagasaki, JP;
Kouki Tomimura, Shunan, JP;
Nisshin Steel Co., Tokyo, JP;
Abstract
When a metastable austenitic stainless steel strip with a value Md(N), which is calculated from a composition, of 20–100 is ring-rolled to a steel belt, the relationship of −0.3913T+0.5650Md(N)+60.46ε≧65.87 is established among a material temperature T, an equivalent strain ε and the value Md(N). Due to the controlled rolling, a stainless steel belt for a continuously variable transmission is bestowed with fatigue properties similar or superior to those of a 18%-Ni maraging steel belt. The value Md(N) is defined by the equation of Md(N)=580−520C−2Si−16Mn−16Cr−23Ni−300N−10Mo, and the equivalent strain ε is defined by the equation of ε=√{square root over (4(1n(1−R))/3)} (R: reduction). Furthermore, the steel belt is stabilized in its quality and profile by confining a variation ΔT of the material temperature T within a range of ±6.4° C.