弛豫时间对X100管线钢组织和力学性能的影响
Effects of Relaxation Time on Microstructure and Mechanical Properties of X100 Pipeline Steels
摘 要
采用拉伸试验、冲击试验以及显微组织观察等方法研究了轧后弛豫时间对X100管线钢显微组织与力学性能的影响.结果表明:随着弛豫时间延长,贝氏体铁素体板条变宽,板条内部位错密度降低,碳氮化物析出量增多,屈服强度呈现先减小后增大的趋势,抗拉强度缓慢增加,屈强比与断后伸长率先降低后升高然后再降低,-20℃下的冲击功先升高后降低;弛豫时间为52 s时能够获得较高的强度、韧性和均匀伸长率,可满足X100管线钢抗大变形的要求.
管线钢
析出物
贝氏体
relaxation
pipeline steel
precipitate
bainite
Abstract
The effects of relaxation time after rolling on microstructure and mechanical properties of X100 pipeline steel by tensile testing,impacting testing and microstructure observing.The results show that with the prolongation of relaxation time,the bainite ferrite laths became wide and dislocation density inside laths reduced,the volume of carbonitride precipitation increased,the yield strength firstly decreased and then increased,the tensile strength increased slowly,the yield ratio and elongation after fracture decreased firstly,then increased and then decreased,and the impact energy at -20℃ increased firstly and then decreased.When the relaxation time was 52 s,higher strength,higher toughness and uniform elongation were achieved,those could meet the demands of large deformation of X100 pipeline steel.
中图分类号 TG142.1
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50974063);江西省教育厅基金资助项目(GJJ14409);江西科技厅基金资助项目(20142BAB216010);江西理工大学科研基金资助项目(NSFJ2014-K03)
收稿日期 2013/11/27
修改稿日期 2014/9/30
网络出版日期
作者单位点击查看
备注张丽娜(1977-),女,安徽宿州人,讲师,硕士.
引用该论文: ZHANG Li-na,QI Liang,XIAO Hong-yan. Effects of Relaxation Time on Microstructure and Mechanical Properties of X100 Pipeline Steels[J]. Materials for mechancial engineering, 2015, 39(3): 16～21
张丽娜,齐亮,肖鸿雁. 弛豫时间对X100管线钢组织和力学性能的影响[J]. 机械工程材料, 2015, 39(3): 16～21
被引情况:
【1】姚婷珍,肖美霞,许天旱,王党会, "不同钢种真实应力屈强比与工程应力屈强比的测试与对比",机械工程材料 40, 30-33(2016)
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【3】尚成嘉,杨善武,王学敏,等.高强度低碳贝氏体钢的工艺与组织细化[J].金属学报,2003,39(10):1019-1024.
【4】郑东升,朱伏先,李艳梅,等.空冷弛豫对铌微合金化热轧TRIP钢组织性能的影响[J].材料热处理学报,2011,32(3):73-78.
【5】焦多田,蔡庆伍,武会宾.轧后冷却制度对X80级抗大变形管线钢组织和屈强比的影响[J].金属学报,2009,45(9):1111-1116.
【6】DI W,ZHUANG L.Effect of thermomechanical controlled processing on the microstructure and mechanical properties of Fe-C-Mn-Si multiphase steels[J].ISIJ International,2006,46(7):1059-1066.
【7】TANGUY B,LUU T T,PERRIN G,et al.Plastic and damage behaviour of a high strength X100 pipeline steel:experiments and modeling[J].International Journal of Pressure Vessels and Piping,2007,85(5):322-335.
【8】CABALLERO F G,MILLER M K,BABU S S,et al.Atomic scale observations of bainite transformation in a high carbon high silicon steel[J].Acta Materialia,2007,55(1):381-390.
【9】高绪涛,赵爱民,赵征志.热轧TRIP钢残余奥氏体及其稳定性研究[J].材料工程,2011(11):39-44.
【10】周民,马秋花,杜林秀,等.X100管线钢的组织性能[J].东北大学学报:自然科学版,2009,30(7):985-988.
【11】ZHENG D S,ZHU F X,LI Y M,et al.Effect of cooling patterns on microstructure and mechanical properties of hot rolled Nb microalloyed multiphase steel plates[J].Journal of Iron and Steel Research International ,2011,18(8):46-52.
【12】雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006:400-425.
【13】YOSHINAGA N,USHIODA K,AKAMATSU S,et al.Precipitation behavior of sulfides in Ti-added ultra low-carbon steels in austenite[J].ISIJ International,1994,34(1):24-32.
【14】齐亮,申邦坡,胡义锋,等.含Nb-Ti-Al的X100管线钢碳氮化物析出研究[J].武汉科技大学学报,2012,35(3):361-362.
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