基本信息:
- 专利标题： 气囊充气机用高强度焊接钢管和其制造方法
- 申请号：CN201580056771.5 申请日：2015-10-19
- 公开(公告)号：CN107075638B 公开(公告)日：2019-08-02
- 发明人： 荒谷昌利 , 河端良和 , 岩崎谦一 , 松井亮二
- 申请人： 杰富意钢铁株式会社
- 申请人地址： 日本东京都
- 专利权人： 杰富意钢铁株式会社
- 当前专利权人： 杰富意钢铁株式会社
- 当前专利权人地址： 日本东京都
- 代理机构： 北京集佳知识产权代理有限公司
- 代理人： 苗堃; 金世煜
- 优先权： 2014-216171 2014.10.23 JP
- 国际申请： PCT/JP2015/005249 2015.10.19
- 国际公布： WO2016/063513 JA 2016.04.28
- 进入国家日期： 2017-04-19
- 主分类号： C22C38/02
- IPC分类号： C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/28 ; C22C38/24 ; C22C38/42 ; C22C38/20 ; C22C38/26 ; B60R21/264 ; B60R21/268 ; C21D9/08 ; C22C38/38 ; C22C38/58 ; B23K13/00 ; B23K13/02 ; B23K26/262
Disclosed is a high-strength welded steel pipe for airbag inflators that has high toughness and workability. A base material portion of the steel pipe has a composition containing, in mass %, C: 0.02 to 0.08%, Si: 0.001 to 1.0%, Mn: 0.1 to 2.0%, P: 0.1% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Ti: 0.01 to 0.20%, and V: 0.01 to 0.50%, with the balance being Fe and incidental impurities. The base material portion has a structure that includes a ferrite phase having an average grain size of 10 μm or less at an area fraction of 90% or more and a Ti, V-based carbide having an average grain size of 10 nm or less and dispersed in the ferrite phase. The welded steel pipe has a high tensile strength TS of 780 MPa or more and a strength-elongation balance TS×El of 15,000 MPa % or more. The difference ΔHV in Vickers hardness between the base material portion and the welded portion is 60 points or less. In a softened portion having Vickers hardness different from the Vickers hardness of the base material portion by at least 30 points, a softened width Ws in a circumferential direction is 0.05 mm or less.
公开/授权文献:
- CN107075638A 气囊充气机用高强度焊接钢管和其制造方法 公开/授权日：2017-08-18
IPC结构图谱:
| C | 化学；冶金 |
| --C22 | 冶金（铁的冶金入C21）；黑色或有色金属合金；合金或有色金属的处理 |
| ----C22C | 合金 |
| ------C22C38/00 | 铁基合金，例如合金钢 |
| --------C22C38/02 | .含硅的 |