摘要
以20CrMnSi低合金钢汽车变速箱双联齿轮的CO2激光焊焊接过程为研究对象,利用SYSWELD有限元分析软件,模拟不同热输入下焊缝及邻缝区域的温度场分布,得出最优工艺参数。分析了最优工艺参数下的热循环曲线并进行了焊接试验,得到了和模拟结果相近的焊缝横截面轮廓,并分析了热影响区的金相组织,验证了所建模型的可靠性。
The CO2 laser welding process for low-alloy steel 20CrMnSi double gear used in automobile transmission was investigated. The distribution of temperature field in the weld seam and its adjacent zone under different heat input was analyzed by finite element software SYSWELD, and the optimum process parameters was obtained. Furthermore, the thermal cycling curve under the optimal parameters was analyzed, as well as the welding experimental was carried out. By the optimum process parameters, the cross-sectional profile of the welds for simulation and experiment were achieved, which are similar. In addition, the microstructure in heat affected zone （HZA） of the weld beam was analyzed, and the reliability of the model was verified.
出处
《热加工工艺》
CSCD
北大核心
2012年第15期148-150,154,共4页
Hot Working Technology
关键词
激光焊
双联齿轮
温度场
有限元分析
laser welding
double gear
temperature field
finite element analysis
