| 残留奥氏体对微纳贝氏体钢塑韧性的影响 |
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| 引用本文： | 万响亮,胡锋,成林,黄刚,张国宏,吴开明.残留奥氏体对微纳贝氏体钢塑韧性的影响[J].钢铁研究学报,2019,31(3):305-311. |
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| 作者姓名： | 万响亮 胡锋 成林 黄刚 张国宏 吴开明 |
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| 作者单位： | 武汉科技大学钢铁冶金及资源利用省部共建教育部重点试验室,湖北 武汉,430081;武汉科技大学钢铁冶金及资源利用省部共建教育部重点试验室,湖北 武汉 430081;武汉科技大学高性能钢铁材料及其应用湖北省协同创新中心,湖北 武汉 430081;武汉科技大学高性能钢铁材料及其应用湖北省协同创新中心,湖北 武汉,430081 |
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| 摘 要： | 采用高碳和中碳低温贝氏体转变工艺（095C钢为200℃等温10d，030C钢为320℃等温1d）研究了残留奥氏体对微纳结构钢塑韧性的影响，对不同试样的显微组织、各相体积分数、伸长率和冲击韧性进行观察、检测和分析。试验结果表明，中碳钢贝氏体转变的塑韧性明显高于高碳钢贝氏体转变，主要原因是中碳钢贝氏体转变中存在一定的亚微米级薄膜状残留奥氏体，在拉伸或冲击过程中引起的残留奥氏体的塑性变形，使断裂的能量增加，可以显著提高样品的塑韧性。
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| 关 键 词： | 低温贝氏体 热处理工艺 残留奥氏体 伸长率 冲击韧性 |
Effect of retained austenite on plasticity and toughness of micro/nano bainitic steel |
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| WAN Xiang-liang,HU Feng,CHENG Lin,HUANG Gang,ZHANG Guo-hong,WU Kai-ming.Effect of retained austenite on plasticity and toughness of micro/nano bainitic steel[J].Journal of Iron and Steel Research,2019,31(3):305-311. |
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| Authors: | WAN Xiang-liang HU Feng CHENG Lin HUANG Gang ZHANG Guo-hong WU Kai-ming |
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| Affiliation: | 1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan;
University of Science and Technology, Wuhan 430081, Hubei, China; 2.Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China |
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| Abstract: | The effect of retained austenite on the plasticity and toughness in micro/nano structured steels was analyzed by high and medium carbon bainitic transformation processes (200℃ for 10 days in 095C and 320℃ for 1 day in 030C steel). The microstructure, phase fraction, elongation and impact toughness of different steels were observed, detected and analyzed. The results show that the plasticity and impact properties of medium carbon bainitic transformation were significantly higher than those of high carbon bainitic transformation. The main reason is that some retained austenite in shape of sub micron film is formed in medium carbon bainitic transformation. The plastic deformation of the retained austenite in the stretching or impact process can significantly improve the plasticity and toughness of the steel since the fracture energy was increased. |
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| Keywords: | float: none background-color: rgb(255 255 255) color: rgb(0 0 0) font-family: Arial Verdana Sans-Serif font-size: 12px font-style: normal font-variant: normal font-weight: 400 letter-spacing: normal orphans: 2 text-align: left text-decoration: none text-indent: 0px text-transform: none -webkit-text-stroke-width: 0px white-space: normal word-spacing: 0px low temperature bainite" target="_blank">">low temperature bainite heat treatment process retained austenite elongation impact toughness |
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