| 超高强度悬架弹簧用钢55SiCrNb的工业试制 |
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| 引用本文： | 陈焕德,麻晗,孙国才,张宇. 超高强度悬架弹簧用钢55SiCrNb的工业试制[J]. 金属热处理, 2022, 47(9): 208-213. DOI: 10.13251/j.issn.0254-6051.2022.09.036 |
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| 作者姓名： | 陈焕德 麻晗 孙国才 张宇 |
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| 作者单位： | 江苏省(沙钢)钢铁研究院, 江苏 张家港 215625 |
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| 摘 要： | 研究了过冷奥氏体连续冷却相变行为,探索了冷却速率对组织的影响,在工业生产线试制出直径ϕ16 mm热轧盘条。通过拉拔和感应热处理试制出直径ϕ14.8 mm钢丝,钢丝组织为回火屈氏体+少量回火马氏体+少量残留奥氏体,抗拉强度大于2160 MPa,断面收缩率大于44%,可用于制造强度等级为2100 MPa的弹簧。
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| 关 键 词： | 悬架弹簧钢 回火屈氏体 抗拉强度 断面收缩率 |
| 收稿时间： | 2022-05-30 |
Industrial trial manufacture of 55SiCrNb steel for ultra high strength suspension spring |
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| Chen Huande,Ma Han,Sun Guocai,Zhang Yu. Industrial trial manufacture of 55SiCrNb steel for ultra high strength suspension spring[J]. Heat Treatment of Metals, 2022, 47(9): 208-213. DOI: 10.13251/j.issn.0254-6051.2022.09.036 |
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| Authors: | Chen Huande Ma Han Sun Guocai Zhang Yu |
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| Affiliation: | Institute of Research of Iron and Steel, Shasteel, Zhangjiagang Jiangsu 215625, China |
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| Abstract: | Continuous cooling transformation behavior of the supercooled austenite test 55SiCrNb steel was studied, and the effect of cooling rate on microstructure was clarified, and wire with a diameter of 16 mm was hot rolled via industrial production line. A strong steel wire with a diameter of 14.8 mm was fabricated through drawing and on-line induction heat treatment. The microstructure of steel wire consists of tempered troostite, a few tempered martensite and retained austenite, and exhibits tensile strength higher than 2160 MPa, and reduction of area larger than 44%, which is qualified for making springs with a strength level of 2100 MPa. |
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| Keywords: | suspension spring steel tempered troostite tensile strength percentage reduction of area |
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