应用数值模拟技术建立了 SS400钢中厚板焊接有限元模型，采用生死单元技术结合体生热率热源模型，在不同热输入下对其焊接热循环过程进行模拟计算，根据模拟得到的特征温度值进而得到不同热输入下热影响区宽度的变化规律，并将模拟结果与试验结果进行对比验证.结果表明：过热区宽度受热输入变化的影响较小，但不完全重结晶区宽度随热输入的增加几乎成线性增长；焊接热循环曲线模拟值与试验值的误差小于4．5％，热影响区宽度模拟值与试验值基本吻合，证明了建模及加载的准确性.
The finite element model for the welding process of SS400 medium steel plate was established by using the numerical simulation technique.The body heat source model combined with birth-death model was adopted for the simulation of weld thermal cycle process under different heat-input conditions.According to the simulated characteristic temperature,the change law of heat affected zone (HAZ)width was obtained.The simulated and experimental results were compared.The results show that the influence of heat-input on the width of overheated zone was little;the width of incomplete recrystallization zone increased linearly with the increase of heat-input.The error between the simulated values and test values of thermal circling curves was below 4.5%.The simulated width for the welding HAZ was accorded with test value,which proved the accuracy of modeling and loading.
参考文献
| [1] | Shi YW;Chen D;Lei YP;Li XY .HAZ microstructure simulation in welding of a ultra fine grain steel[J].Computational Materials Science,2004(3/4):379-388. |
| [2] | SHIGA C.Progress in welding and joining in STX-21project[A].Tsukuba,Japan,2000:159-173. |
| [3] | 侯振波,史耀武,田志凌.SS400超细晶粒钢及其焊接接头的疲劳裂纹扩展速率[J].钢铁研究学报,2004(02):47-49. |
| [4] | 陈伯蠡.焊接冶金原理[M].北京:清华大学出版社,199 1:40-41. |
| [5] | 孙盼,李文,姬庆玲.Q235钢焊接温度场的数值模拟[J].中国水运(下半月),2010(07):235-236. |
| [6] | 武传松.焊接热过程与熔池形态[M].北京:机械工业出版社,2007:53-121. |
| [7] | 徐春华,张茂森.800MPa超细晶粒钢焊接过程的有限元分析[J].机械工程材料,2012(12):94-97. |
| [8] | SS400钢焊接温度场数值模拟与试验验证[J].内蒙古科技大学学报,2014(02):103-108. |
| [9] | GAO J;THOMPSON R .Real time-temperature models for Monte Carlo simulation of normal grain growth[J].Acta Metallurgica,1996,44(11):4565-4570. |
| [10] | 张文钺.焊接冶金学(基本原理)[M].北京:机械工业出版社,1999:132-175. |
| [11] | 苏德达;李家俊.钢的高温金相学[M].天津:天津大学出版社,2009:80-100. |
| [12] | RODRIGUES D M;MENEZES L F;LOUREIRO A .The influence of the HAZ softening on the mechanical behaviour of welded joints containing cracks in the weld metal[J].Engineering Fracture Mechanics,2004,71(13):2053-2064. |
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