| 高强度热轧双相钢的低周疲劳性能 |
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| 引用本文： | 刘斌,吴润,王孟,梁文,刘冬,周和荣.高强度热轧双相钢的低周疲劳性能[J].钢铁研究学报,2017,29(8):667-670. |
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| 作者姓名： | 刘斌 吴润 王孟 梁文 刘冬 周和荣 |
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| 作者单位： | 1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉 430081;武汉钢铁有限公司研究院,湖北 武汉 430080;2. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉,430081;3. 武汉钢铁有限公司研究院,湖北 武汉,430080 |
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| 基金项目： | 科技部科技基础条件平台专项，湖北省自然科学基金资助项目 |
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| 摘 要： | 从热轧双相钢的实际应用需求出发,研究了高强度热轧双相钢DP600的低周疲劳性能。采用轴向应变控制方法对DP600钢进行了低周疲劳试验,并对试验数据进行拟合计算,得到DP600钢的循环应力-应变曲线、应变-寿命曲线和过渡疲劳寿命。通过扫描电镜观察疲劳断口,结果显示低周疲劳条件下,DP600钢断裂裂纹起源于试样表面,裂纹扩展前期呈现部分脆性断裂特征,后期则以明显的韧性断裂为主。
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| 关 键 词： | 热轧双相钢 低周疲劳 应变-寿命曲线 裂纹扩展 |
Low cycle fatigue properties of hot-rolled high strength dual phase steel |
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| LIU Bin,WU Run,WANG Meng,LIANG Wen,LIU Dong,ZHOU He-rong.Low cycle fatigue properties of hot-rolled high strength dual phase steel[J].Journal of Iron and Steel Research,2017,29(8):667-670. |
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| Authors: | LIU Bin WU Run WANG Meng LIANG Wen LIU Dong ZHOU He-rong |
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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?? Research and Development Center of WISCO, Wuhan 430080, Hubei, China |
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| Abstract: | In order to meet the demand of the practical application of hot-rolled dual-phase steel,the low cycle fa-tigue properties of high strength hot-rolled dual-phase steel DP600 were investigated.The method of the axial strain was used to investigate the low cycle fatigue properties of hot-rolled high strength steel DP600. The date was calculated and fitted to obtain the cyclic stress-strain curve,strain-life curve and transitional fatigue life of DP600. The fatigue fracture was characterized by SEM and the results show that the cracks originate from the surface of the sample under the low cycle fatigue test.In early stage of the crack propagation it reveals brittle frac-ture but obvious ductile fracture in later stage. |
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| Keywords: | hot-rolled dual phase steel low cycle fatigue strain-life curve crack propagation |
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