An Integrated Model to Simulate Laser Cladding Manufacturing Process for Engine Repair Applications
An Integrated Model to Simulate Laser Cladding Manufacturing Process for Engine Repair Applications
复制标题
模拟发动机维修应用激光熔覆制造工艺的集成模型
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Babu
中科院分区：
文献类型：
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作者：
Yu;S. Babu
建立了发动机叶片激光熔覆修复过程中温度、热机械应变、应力和变形的综合模型。该模型被用来分析一个简化的几何形状，以评估工艺条件对凝固裂纹倾向的影响。研究了两种情况下，有和没有冷却到室温之间的焊接层。模拟结果表明，与焊层间冷却相比，焊层间不冷却的激光熔覆在凝固后冷却过程中产生更高的温度和更大的热机械拉伸应变。这表明，与焊接层之间冷却相比，焊接层之间不冷却时的凝固裂纹倾向更高。由于连续激光熔覆过程中没有焊层间冷却的预热效应，与焊层间冷却相比，残余应力较低，但变形较大。
An integrated thermal, microstructure, and thermomechanical model was developed to predict temperature, thermomechanical strain, stress and distortion evolution during laser cladding of engine blade repair. The model was used to analyze a simplified geometry to evaluate the effect of process conditions on solidification cracking tendency. Two cases with and without cooling to room temperature between welded layers were studied. Simulation results suggested that laser cladding without cooling down between welded layers produces higher temperature, higher thermomechanical tensile strain during cooling after solidification than with cooling down between welded layers. This indicates that the solidification cracking tendency is higher without cooling down between welded layers than with cooling down between welded layers. Because of the preheating effect resulted from the continual laser cladding without cooling down between welded layers, the residual stress is lower, but the distortion is higher than the case with cooling down between welded layers.