Invention Grant
- Patent Title: Method for laser heat treatment to improve formability of advanced high strength steels
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Application No.: US14145034Application Date: 2013-12-31
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Publication No.: US09670560B2Publication Date: 2017-06-06
- Inventor: Kyung-Bo Kim
- Applicant: Hyundai Motor Company
- Applicant Address: KR Seoul
- Assignee: Hyundai Motor Company
- Current Assignee: Hyundai Motor Company
- Current Assignee Address: KR Seoul
- Agency: Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.
- Agent Peter F. Corless
- Priority: KR10-2013-0111533 20130917
- Main IPC: C21D1/34
- IPC: C21D1/34 ; C21D8/00 ; B23K26/00 ; B23K101/00 ; B23K101/18 ; B23K103/04 ; B23K103/00

Abstract:
A method for laser heat treatment of high tensile steel is provided to improve for improving formability. The method includes performing a heat treatment by irradiating a surface of a high tensile steel blank that includes a martensite structure and a ferrite structure with a laser to decrease a fraction of the martensite structure and increase a fraction of the ferrite structure. In addition, the method includes slowly cooling the blank to temper or anneal the heat-treated blank and subjecting the cooled blank to cold press forming.
Public/Granted literature
- US20150075678A1 METHOD FOR LASER HEAT TREATMENT TO IMPROVE FORMABILITY OF ADVANCED HIGH STRENGTH STEELS Public/Granted day:2015-03-19
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