45钢交流闪光对焊焊接热影响区晶粒长大的数值模拟
Numerical Simulation of Grain Growth in Alternating Flash Butt Welding HAZ for 45 Steel
摘 要
基于45钢轴对称件交流闪光对焊过程的实测温度场和焊接热循环曲线的拟合处理,结合Monte Carlo(MC)算法确定的模拟模型常数,建立了焊接热影响区晶粒长大的模拟时间tMCS与实际时间t、温度T之间的关系,用MC方法模拟了焊接热影响区的晶粒长大.结果表明:在相同的tMCS值下,MC模拟热循环过程后晶粒平均尺寸约为等温加热转变过程后晶粒尺寸的70%左右;焊接热循环加热阶段后的晶粒尺寸仅为最终晶粒尺寸的25%～30%;模拟值与试验结果基本吻合.
焊接热循环
热影响区
数值模拟
晶粒长大
flash butt welding
welding thermal cycle
HAZ
numerical simulation
grain growth
Abstract
The weld thermal cycle curve of 45 steel in alternating flash butt welding HAZ was simulated according to the actually measured temperature field of axisymmetric weldments.The relationship of tMCS to the actual time t and temperature T was determined with the parameters in HAZ by MC method.The MC simulation makes the average grain size in the welding HAZ after thermal cycle process as 70% of that after isothermal heating at same tMCS.The welding heating process makes the grain grow only 25%-30% of the final grain size.The simulated results are in agreement with the measured results.
中图分类号 TG457.11
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2007/5/3
修改稿日期 2007/9/3
网络出版日期
作者单位点击查看
备注张根元(1963-),男,江苏昆山人,副教授/高级工程师,硕士.
引用该论文: ZHANG Gen-yuan,CHEN Hong-lian,XU Mai-li,WU Jian-jian. Numerical Simulation of Grain Growth in Alternating Flash Butt Welding HAZ for 45 Steel[J]. Materials for mechancial engineering, 2008, 32(7): 75～78
张根元,陈洪莲,徐迈里,吴建建. 45钢交流闪光对焊焊接热影响区晶粒长大的数值模拟[J]. 机械工程材料, 2008, 32(7): 75～78
被引情况:
【1】惠亚军,李文远,潘 辉,刘 锟,陈 斌,崔 阳,吴科敏, "闪光对焊焊接380CL钢轮辋焊缝开裂原因分析",机械工程材料 40, 100-103(2016)
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参考文献
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【3】张根元,陈洪莲,徐迈里.轴对称件闪光对焊的温度场分布、组织和性能研究[J].热加工工艺,2006,35(19):5-7.
【4】桂赤斌,崔昆,李志远.焊接热影响区晶粒长大动力学及其晶粒长大图的建立[J].焊接学报,1990,11(3):136-141.
【5】牛济泰.材料和热加工领域的物理模拟技术[M].北京:国防工业出版社,1999.
【6】Gao Jinhua,Thompson R G.Real time-temperature-ature models for Monte Carlo simulations of normal grain growth[J].Acta Metall,1996,44(11):4565-4570.
【7】毛卫民,赵新兵.金属的再结晶与晶粒长大[M].北京:冶金工业出版社,1994.
【8】莫春立,钱百年,李殿中,等.铁素体不锈钢焊接HAZ的晶粒长大模型[J].材料研究学报,2001,15(3):343-347.
【9】Mishra S,DebRoy T.Measurements and Monte Carlo simulation of grain growth in the heat-affected zone of Ti-6Al-4V welds[J].Acta Materialia,2004,52:1183-1192.
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