Invention Grant
- Patent Title: High-strength stabilizer steel for vehicles having excellent corrosion resistance and low-temperature toughness, method of producing the same, and stabilizer
- Patent Title (中): 具有优异的耐腐蚀性和低温韧性的车辆用高强度稳定剂钢及其制造方法以及稳定剂
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Application No.: US13207600Application Date: 2011-08-11
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Publication No.: US08206521B2Publication Date: 2012-06-26
- Inventor: Katsuhiko Kikuchi , Kunikazu Tomita , Yutaka Tamai , Kazuaki Hattori , Kanji Inoue , Akira Tange , Norihiko Mori , Yurika Goto , Kiyoshi Kurimoto
- Applicant: Katsuhiko Kikuchi , Kunikazu Tomita , Yutaka Tamai , Kazuaki Hattori , Kanji Inoue , Akira Tange , Norihiko Mori , Yurika Goto , Kiyoshi Kurimoto
- Applicant Address: JP Yokohama-shi JP Tokyo
- Assignee: NHK Spring Co., Ltd.,JFE Bars & Shapes Corporation
- Current Assignee: NHK Spring Co., Ltd.,JFE Bars & Shapes Corporation
- Current Assignee Address: JP Yokohama-shi JP Tokyo
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2009-030173 20090212
- Main IPC: C21D1/00
- IPC: C21D1/00 ; C22C38/42
Abstract:
According to one embodiment, a high-strength stabilizer steel for vehicles having excellent corrosion resistance and low-temperature toughness, containing 0.07 to 0.20% C, more than 0.6% and 1.5% or less Si, 1 to 3% Mn, 0.1 to 1.0% Cr, 0.005 to 0.080% sAl, 0.005 to 0.060% Ti, 0.005 to 0.060% Nb, 0.070% or less Ti+Nb, 150 ppm or less N, 0.035% or less P, 0.035% or less S, 0.01 to 1.00% Cu, 0.01 to 1.00% Ni, the remainder being Fe, and unavoidable impurities, wherein a structure before molding a stabilizer is any one of a bainite, a martensite, and a mixed structure of bainite/martensite and an original austenitic crystal grain size number after a heat treatment of the stabilizer is Gh 9 or more.
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