钒对X80管线钢热变形后连续冷却转变行为的影响
Effect of Vanadium on the Continuous Cooling Transformation Behavior of X80 Pipeline Steels after Thermal Deformation
摘 要
采用Gleeble-3500型热模拟试验机测定了两种X80管线钢(不含钒和含钒)热变形后过冷奥氏体连续冷却转变曲线(CCT), 用光学显微镜观察了试验钢在不同速率冷却后的组织, 并分析了钒对该钢连续冷却相变动力学的影响。结果表明: 两种试验钢在试验冷速范围内均可以获得针状铁素体; 添加微量钒可以促进珠光体相变, 降低多边形铁素体的相变开始温度和针状铁素体的相变终止温度, 对高冷速(大于2 ℃·s-1)下针状铁素体的相变开始温度影响不明显, 但使低冷速下针状铁素体相变开始温度降低; 钒的加入还使相变组织得到了细化。
热变形
连续冷却转变曲线
pipeline steel
thermal deformatin
continuous cooling transformation curve
Abstract
In this paper, the overcooling austenite continuous cooling transformation curves (CCT) of two kinds of X80 pipeline steels (without vanadium steel and with vanadium) after thermal deformation were determined by Gleeble-3500 thermal simulator. The microstructure of the samples at different cooling rates was observed through the optical microscopy. Furthermore, the effect of vanadium on the continuous cooling transformation kinetics of the steel was discussed. The results show that acicular ferrite could be obtained in the two kinds of steels within experimental cooling rates. Element vanadium could accelerate the phase transformation of pearlite, decrease the transformation start temperature of polygonal ferrite and the transformation finish temperature of acicular ferrite. However, the addition of vanadium had little influence on the transformation start temperature of acicular ferrite at high cooling rate(＞2 ℃·s-1) and dropped the phase transformation start temperature at low cooling rate. In addition, element vanadium could refine the phase transformation structure.
中图分类号 TG151.2
所属栏目
基金项目 河北省科技支撑计划项目(09276705D); 河北省自然科学基金资助项目(E2009000443); 国家教育部博士点专项基金(20070216008)
收稿日期 2010/5/19
修改稿日期 2011/1/16
网络出版日期
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备注李诚诚(1987-), 女, 河北沧州人, 硕士研究生。
引用该论文: LI Cheng-cheng,QIAO Gui-ying,CAO Ya-bin,HE Cheng-wei. Effect of Vanadium on the Continuous Cooling Transformation Behavior of X80 Pipeline Steels after Thermal Deformation[J]. Materials for mechancial engineering, 2011, 35(6): 35～37
李诚诚,乔桂英,曹雅彬,何成伟. 钒对X80管线钢热变形后连续冷却转变行为的影响[J]. 机械工程材料, 2011, 35(6): 35～37
被引情况:
【1】梁宇,石芷伊,梁益龙, "钒含量对不同冷速冷却后高碳珠光体钢显微组织的影响",机械工程材料 37, 19-22(2013)
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参考文献
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【2】齐俊杰, 黄运华, 张跃.微合金化钢[M].北京: 冶金工业出版社, 2006:31-39.
【3】王有铭.钢材的控制轧制和控制冷却[M].北京:冶金工业出版社, 1995:198-224.
【4】杨继宏, 刘光亚.Nb、V、Ti在钢中的作用及其在天铁的应用前景[J].天津冶金, 2006(6):39-40.
【5】MEYER L. 钢的微合金化及控制轧制[M].李述创, 译.北京:冶金工业出版社, 1984:199.
【6】MEDINA S F, LOPEZ V. Static recrystallization in austenite and its influence on microstructure changes in C-Mn steel and vanadium microalloyed steel at the hot strip mill[J].ISIJ Int, 1993, 32:605-614.
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