Rolled steel bar or rolled wire rod for cold-forged component
US10829842B2 · kind B2 · utility
0Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2015 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Mar 27, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a rolled steel bar or rolled wire rod for a cold-forged component having a predetermined chemical composition, Y1 represented by Y1=[Mn]×[Cr] and Y2 represented by Y2=0.134×(D/25.4−(0.50×√[C])/(0.50×√[C]) satisfy Y1>Y2, the tensile strength is 750 MPa or less, an internal structure is a ferrite-pearlite structure, and the ferrite fraction in the internal structure is 40% or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.