Title:
METHOD FOR MANUFACTURING TAILOR WELDED BLANK USING STEEL SHEET FOR HOT PRESSING HAVING AL-FE-BASED INTERMETALLIC ALLOY LAYER
Document Type and Number:
WIPO Patent Application WO/2022/131862
Kind Code:
A1
Abstract:
An embodiment of the present invention provides a method for manufacturing a tailor welded blank using a steel sheet for hot pressing having an Al-Fe-based intermetallic alloy layer, the method comprising the steps of: preparing a plated steel sheet having a base steel sheet and an aluminum-based plated layer formed on one surface or both surfaces of the base steel sheet; heat-treating the plated steel sheet so that the aluminum-based plated layer becomes an Al-Fe-based intermetallic alloy layer; and subjecting the heat-treated plated steel sheet to butt welding, wherein, before the welding, a part or the entirety of the Al-Fe-based intermetallic alloy layer located in an area to be welded is removed.
Inventors:
UHM SANG-HO (KR)
OH JIN-KEUN (KR)
OH JIN-KEUN (KR)
Application Number:
PCT/KR2021/019308
Publication Date:
June 23, 2022
Filing Date:
December 17, 2021
Export Citation:
Assignee:
POSCO (KR)
International Classes:
B23K26/21; C23C2/12; C23C2/28; C23C2/40; B23K101/18
Foreign References:
| KR20200102534A | 2020-08-31 | |||
| KR20140143477A | 2014-12-17 | |||
| KR20180089129A | 2018-08-08 | |||
| KR101325871B1 | 2013-11-05 | |||
| KR20190069471A | 2019-06-19 | |||
| EP0971044A1 | 2000-01-12 |
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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