Production method of belt for stainless steel continuously variable transmission belt
US7150800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2002 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Jan 22, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B45/004
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.