发明名称 |
QUENCHED STEEL PIPE MEMBER, VEHICLE AXLE BEAM USING QUENCHED STEEL PIPE MEMBER, AND METHOD FOR MANUFACTURING QUENCHED STEEL PIPE MEMBER |
摘要 |
A quenched steel pipe member is formed of a GI galvanized steel pipe, in a middle section in a longitudinal direction of the GI galvanized steel pipe, a cross-section perpendicular to the longitudinal direction has a substantially V shape including a contact section at which opposite parts of an inner circumferential surface of the GI galvanized steel pipe come into contact with each other, the contact section is bonded using a Fe—Zn alloy phase, and a micro Vickers hardness at a location 50 μm deep from a base material surface layer is 95% or more of a micro Vickers hardness at a location 200 μm deep from the base material surface layer. |
申请公布号 |
US2015144228(A1) |
申请公布日期 |
2015.05.28 |
申请号 |
US201314409061 |
申请日期 |
2013.09.12 |
申请人 |
Nippon Steel & Sumitomo Metal Corporation |
发明人 |
Fukushi Takaaki;Sato Koichi;Kato Satoshi;Hamatani Hideki;Hirota Yoshiaki |
分类号 |
C21D9/08;B60B35/02;C21D1/60;C22C38/00;C21D1/34 |
主分类号 |
C21D9/08 |
代理机构 |
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代理人 |
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主权项 |
1. A quenched steel pipe member,
wherein the quenched steel pipe member is formed of a GI galvanized steel pipe, in a middle section in a longitudinal direction of the GI galvanized steel pipe, a cross-section perpendicular to the longitudinal direction has a substantially V shape including a contact section at which opposite parts of an inner circumferential surface of the GI galvanized steel pipe come into contact with each other, the contact section is bonded using a Fe—Zn alloy phase, and a micro Vickers hardness at a location 50 μm deep from a base material surface layer is 95% or more of a micro Vickers hardness at a location 200 μm deep from the base material surface layer. |
地址 |
Tokyo JP |