Title:
コーティングされたスタンピング部品の製造方法、及び同方法から作製される部品
Document Type and Number:
Japanese Patent JP2012516939
Kind Code:
A
Abstract:
A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Ti comprised between Te−10° C. and Te, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Ti up to a temperature Tm comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature Ti and the temperature Tm, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tm for a time tm comprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.
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Inventors:
Tillion, Isabelle
Vietris, thomas
Grigorieva, riser
Dollet, pascal
Schaller, Ludovic
Vader, curl, michael
Pearl, Uve
Arsman, Michael
Vietris, thomas
Grigorieva, riser
Dollet, pascal
Schaller, Ludovic
Vader, curl, michael
Pearl, Uve
Arsman, Michael
Application Number:
JP2011546717A
Publication Date:
July 26, 2012
Filing Date:
February 01, 2010
Export Citation:
Assignee:
Arcelor Mittal Investigation I desarojo Ese. Ele.
International Classes:
C23C28/00; C22C21/00; C22C38/00; C22C38/58; C23C2/12
Domestic Patent References:
| JP2004002931A | 2004-01-08 | |||
| JP2009263692A | 2009-11-12 |
Attorney, Agent or Firm:
Asamura patent office
Hideto Asamura
Hajime Asamura
Kameoka Mikio
Katsunori Ando
Hideto Asamura
Hajime Asamura
Kameoka Mikio
Katsunori Ando