- 专利标题: METHOD AND DEVICE FOR PREPARING ALUMINUM-COATED STEEL SHEETS INTENDED FOR BEING WELDED AND THEN HARDENED UNDER A PRESS; CORRESPONDING WELDED BLANK
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申请号: US15306735申请日: 2015-04-17
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公开(公告)号: US20170120391A1公开(公告)日: 2017-05-04
- 发明人: Francis Schmit , René Vierstraete , Qingdong Yin , Wolfram Ehling
- 申请人: ArcelorMittal
- 优先权: IBPCT/IB2014/000612 20140425
- 国际申请: PCT/IB2015/000508 WO 20150417
- 主分类号: B23K26/60
- IPC分类号: B23K26/60 ; B23K26/322 ; B23K26/26
摘要:
The present invention provides a method for the preparation of steel sheets to be fabricated into a welded steel blank. The method includes procuring at least one pre-coated first steel sheet and one pre-coated second steel sheet, made up of a steel substrate and a pre-coating made up of an intermetallic alloy layer in contact with the steel substrate, topped by a layer of aluminum metal or aluminum alloy or aluminum-based alloy, the first sheet having a principal face, an opposite principal face, and at least one secondary face, the second sheet having a principal face, an opposite principal face and at least one secondary face, positioning the first and second sheets, leaving a gap of between 0.02 and 2 mm between the secondary faces and facing each other, the mating of the first and second sheets defining a median plane perpendicular to the principal faces of the first sheet and the second sheet, then removing the layers of metal alloy by melting and vaporization simultaneously on the principal faces, in a peripheral zone of the sheets, the peripheral zones being the zones of the principal faces closest in relation to the median plane located one on either side of it.