Metal sheet to be heated by radiant heat transfer and method of manufacturing the same, and metal processed product having portion with different strength and method of manufacturing the same
US10060017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2010 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Apr 6, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12229
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
On part of a surface of a metal sheet that is to be heated by radiant heat transfer with a near-infrared ray, a region where reflectance for a radiant ray is made lower than that of the original surface of the metal sheet is formed. As reflectance reducing treatment, painting or thermal spraying in a blackish color, plating in a blackish color, treatment for increasing roughness of the surface of the metal sheet, blasting, etching, blackening, surface layer quality changing treatment of the metal sheet, or the like can be adopted. The metal sheet is turned into a heated metal sheet partially having a different temperature by being heated by radiant heat transfer, and thereafter, the heated metal sheet is subjected to thermal processing accompanied by cooling, for example, by hot stamping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.