Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2006-12-19
2006-12-19
King, Roy (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
Reexamination Certificate
active
07150800
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))2/3)} (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.
REFERENCES:
patent: 5640868 (1997-06-01), Lauener
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Hara Kenji
Nishio Katsuhide
Sakaki Masahito
Tomimura Kouki
Umakoshi Yoshiyuki
King Roy
McNelis Kathleen
Nisshin Steel Co.
The Webb Law Firm
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