Steel material for automobile chassis parts superior in fatigue characteristics and method of production of automobile chassis parts using the same
US8778261B2 · kind B2 · utility
10Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Nov 21, 2011 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Nov 21, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2206/72
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a steel material for automobile chassis parts, having high fatigue characteristics, without a heat treatment, and superior shapeability, and a method of production of such automobile chassis parts. The surface of the steel has a high hardness and the center has a low hardness, providing the superior characteristics. With an annealing step of the invention, it is possible to relieve internal stress and further improve fatigue characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.