C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/14 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01) C22C 38/12 (2006.01)
Patent
CA 2301722
Cold rolled steel sheets having improved bake hardenability is provided. Specifically, the present invention relates to a cold rolled steel sheet, with improved bake hardenability, comprising an ultra low carbon steel containing titanium and/or niobium, wherein the relationship between the contents of carbon and molybdenum in solid solution being regulated in a specified range, and a cold rolled steel sheet, with improved bake hardenability, which further contains a specified amount of boron in addition to the above constituents.
L'invention concerne une tôle d'acier laminée à froid présentant une excellente aptitude à la trempe par cuisson et comprenant de l'acier à très faible teneur en carbone contenant Ti et/ou Nb, caractérisée en ce que la relation entre les contenus de Mo et de carbone ayant participé à une solution solide est limitée à une plage spécifique, et la tôle d'acier laminée à froid précitée présente une excellente aptitude à la trempe par cuisson contenant également B en une quantité spécifique.
Goto Koichi
Taniguchi Hirokazu
Yamazaki Kazumasa
Fetherstonhaugh & Co.
Nippon Steel Corporation
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