| 新型无Ni高N奥氏体不锈钢的低温变形行为 |
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| 引用本文： | 徐明舟,王建军,刘春明.新型无Ni高N奥氏体不锈钢的低温变形行为[J].金属学报,2011(10). |
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| 作者姓名： | 徐明舟 王建军 刘春明 |
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| 作者单位： | 东北大学材料各向异性与织构教育部重点实验室; |
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| 基金项目： | 国家科技重大专项2009ZX04008-021; 辽宁省科技攻关计划项目2007221007资助~~ |
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| 摘 要： | 利用冲击实验、拉伸实验、XRD和TEM对2种不同N含量的无Ni高N奥氏体不锈钢低温变形行为进行了研究.结果表明,高N奥氏体不锈钢在低温下发生明显的韧脆转变和加工硬化现象.在实验材料的Mn含量水平内,提高Mn含量能够改善高N奥氏体不锈钢的低温塑性和韧性,降低其韧脆转变温度.18Cr-12Mn-0.55N钢在低温拉伸变形时会发生形变诱导马氏体相变,但马氏体转变量很少,降低温度对马氏体转变量无明显影响.形变诱导马氏体能提高高N奥氏体不锈钢的加工硬化能力,但降低了钢的低温塑性和韧性.加工硬化能力和层错能随温度的降低而降低是Re-Cr-Mn高N奥氏体不锈钢在低温下发生脆断的主要原因.
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| 关 键 词： | 高N奥氏体不锈钢 冲击韧性 力学性能 马氏体转变 |
LOW TEMPERATURE DEFORMATION BEHAVIOR OF HIGH-NITROGEN NICKEL-FREE AUSTENITIC STAINLESS STEELS |
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| XU Mingzhou,WANG Jianjun,LIU Chunming Key Laboratory for Anisotropy , Texture of Materials,Ministry of Education,Northeastern University,Shenyang.LOW TEMPERATURE DEFORMATION BEHAVIOR OF HIGH-NITROGEN NICKEL-FREE AUSTENITIC STAINLESS STEELS[J].Acta Metallurgica Sinica,2011(10). |
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| Authors: | XU Mingzhou WANG Jianjun LIU Chunming Key Laboratory for Anisotropy Texture of Materials Ministry of Education Northeastern University Shenyang |
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| Affiliation: | XU Mingzhou,WANG Jianjun,LIU Chunming Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819 |
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| Abstract: | The low-temperature deformation behaviors of two high-nitrogen nickel-free austenitic stainless steels(HNSs) with different N content were investigated by impact test,tensile test,XRD and TEM.The results indicate that HNS shows apparent ductile-to-brittle transformation (DBT) and work-hardening at low temperature.In the range of the experimental steels' Mn content, the increase of Mn content improved the plasticity and the toughness at low temperature,and decreased the DBT temperature of HNS.Deformation-ind... |
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| Keywords: | high-nitrogen austenitic stainless steel impact toughness mechanical property martensite transformation |
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