公开(公告)号：US20160017452A1

公开(公告)日：2016-01-21

申请号：US14426523

申请日：2013-09-06

Applicant: ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO SL

Inventor： Juan David Puerta Velasquez ,  Jonas Staudte ,  Pascal Drillet

IPC: C21D8/02 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C23F17/00 ,  C22C38/00 ,  C21D6/00 ,  C23C2/12 ,  C23C2/06 ,  C23C2/28 ,  C22C38/32 ,  C22C38/02

CPC classification number: C21D8/0278 ,  B32B15/012 ,  B32B15/013 ,  C21D1/34 ,  C21D1/52 ,  C21D1/673 ,  C21D1/74 ,  C21D1/76 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0457 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: This invention relates to a cold-rolled sheet that is annealed and pre-coated for the fabrication of press hardened parts, composed of a steel substrate for heat treatment with a carbon content C0 between 0.07% and 0.5%, whereby this content is expressed by weight, and a metal pre-coating on at least the two principal faces of the steel substrate, characterized in that the substrate comprises a decarburized area on the surface of each of the two principal faces, whereby the depth p50% of the decarburized area is between 6 and 30 micrometers, whereby p50% is the depth at which the carbon content is equal to 50% of the content C0, and in that the sheet does not contain a layer of iron oxide between the substrate and the metal pre-coating.

Abstract translation: 本发明涉及一种用于制造加压硬化部件的退火和预涂层的冷轧板，其由碳含量C0为0.07％至0.5％的热处理用钢基材组成，由此该含量由 并且在所述钢基材的至少两个主面上进行金属预涂布，其特征在于，所述基板包括在所述两个主面中的每一个的表面上的脱碳区域，由此所述脱碳区域的深度p50％ 在6至30微米之间，其中p 50％是碳含量等于含量C 0的50％的深度，并且该片材在基材和金属预涂层之间不含有氧化铁层。