Method of production of steel product with nanocrystallized surface layer
US7857918B2 · kind B2 · utility
1Cited by
2References
17Claims
0Family size
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Key dates
| Filing date | Nov 17, 2003 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Oct 14, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4578
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of production of a metallic product with a nanocrystallized surface layer comprising subjecting a surface layer of a metallic product to ultrasonic impact treatment by one or more ultrasonic indenters vibrating in a plurality of directions, then subjecting the surface layer subjected to the ultrasonic impact treatment to heat treatment at a low temperature to cause precipitation of nanocrystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.