不锈钢平板焊接过程的温度场模拟
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摘要
以厚大不锈钢平板件作为焊接材料,采用直接差分法求解热传导方程,运用C++语言编写模拟程序,再现焊接过程中的温度场分布,研究了热量集中系数对温度场分布及热影响区的影响。结果表明:焊接过程中,在移动热源前方等温线较密集,热源后方等温线较稀疏,以焊接点为中心,热扩散层呈辐射状。随着热量集中系数k的增加,材料的最高温度和最低温度均升高,热影响区域面积减小。
The effect of heat concentration coefficient on the temperature field distribution and heat-affected zone has been studied, with thick stainless steel plates being used as welding material of which the temperature fi eld distribution in the welding process reappeared with the operation of a simulation program written by C++ language for the heat conduction equation built with direct difference method. The results showed that in the process of welding, isotherm appeared intensive in front of moving heat source and sparse behind it, and with the welding point as the center, heat diffusion layer appeared radially. With the increase of heat concentration coefficient k, both the maximum and minimum temperature of the material increased while the heat affected zone reduced.
The effect of heat concentration coefficient on the temperature field distribution and heat-affected zone has been studied, with thick stainless steel plates being used as welding material of which the temperature fi eld distribution in the welding process reappeared with the operation of a simulation program written by C++ language for the heat conduction equation built with direct difference method. The results showed that in the process of welding, isotherm appeared intensive in front of moving heat source and sparse behind it, and with the welding point as the center, heat diffusion layer appeared radially. With the increase of heat concentration coefficient k, both the maximum and minimum temperature of the material increased while the heat affected zone reduced.
引文
[1]Goldak J,Chakravarti A,Bibby M.A new finite element model for welding heat sources[J].Metallurgical Transactions B,1984,15(2):299-305.
[2]薛忠明,杨广臣,张彦华.焊接温度场与力学场模拟的研究进展[J].中国机械工程,2002,13(11):83-87.
[3]曾祥呈,黄健文,张庆茂.激光焊接过程温度场的模拟[J].应用激光,2008,28(3):190-195.
[4]王希靖,韩晓辉,郭瑞杰,等.搅拌摩擦焊接过程温度场数值模拟[J].焊接学报,2005,26(12):17-20.
[5]胡瑢华,张华,徐健宁,等.接成形中堆积轨迹对温度场影响的数值模拟[J].焊接学报,2005,26(11):75-78.
[6]杨胜,刘国荣.道焊接过程的温度场数值模拟[J].热处理技术与装备,2007,28(6):33-35.
[7]魏艳红,占小红,董志波,等.基于CA模拟焊缝凝固过程枝晶生长的分析[J].焊接学报,2009,30(3):13-16.
[8]马瑞,董志波,魏艳红,等.镍基合金焊缝凝固组织演变过程模拟和仿真[J].焊接学报,2010,31(7):43-46.
[9]占小红,董志波,魏艳红,等.Ni-Cr二元合金焊接熔池中柱状枝晶生长模拟[J].中国有色金属学报,2009,19(8):1431-1436.
[10]王中辉,李冬雪.焊接数值模拟技术的发展现状[J].焊管,2010,33(6):28-31.
[11]宫大猛,雷毅.数值模拟在焊接中的应用分析[J].电焊机,2012,42(6):58-62.
[12]杜世宇,申根林,蔡继新.整体铸造构架焊接变形的控制[J].中国铸造装备与技术,2013(5):3-6.
[2]薛忠明,杨广臣,张彦华.焊接温度场与力学场模拟的研究进展[J].中国机械工程,2002,13(11):83-87.
[3]曾祥呈,黄健文,张庆茂.激光焊接过程温度场的模拟[J].应用激光,2008,28(3):190-195.
[4]王希靖,韩晓辉,郭瑞杰,等.搅拌摩擦焊接过程温度场数值模拟[J].焊接学报,2005,26(12):17-20.
[5]胡瑢华,张华,徐健宁,等.接成形中堆积轨迹对温度场影响的数值模拟[J].焊接学报,2005,26(11):75-78.
[6]杨胜,刘国荣.道焊接过程的温度场数值模拟[J].热处理技术与装备,2007,28(6):33-35.
[7]魏艳红,占小红,董志波,等.基于CA模拟焊缝凝固过程枝晶生长的分析[J].焊接学报,2009,30(3):13-16.
[8]马瑞,董志波,魏艳红,等.镍基合金焊缝凝固组织演变过程模拟和仿真[J].焊接学报,2010,31(7):43-46.
[9]占小红,董志波,魏艳红,等.Ni-Cr二元合金焊接熔池中柱状枝晶生长模拟[J].中国有色金属学报,2009,19(8):1431-1436.
[10]王中辉,李冬雪.焊接数值模拟技术的发展现状[J].焊管,2010,33(6):28-31.
[11]宫大猛,雷毅.数值模拟在焊接中的应用分析[J].电焊机,2012,42(6):58-62.
[12]杜世宇,申根林,蔡继新.整体铸造构架焊接变形的控制[J].中国铸造装备与技术,2013(5):3-6.