基体预热下激光沉积修复GH4169合金温度场和应力场演变  

The Evolution of Temperature Field and Stress Field in Laser Deposition Repair GH4169 with Substrate Preheating

作　　者：卞宏友[1] 翟泉星 曲伸 杨光[1] 王伟[1] 王维[1] Bian Hongyou Zhai Quanxing Qu Shen Yang Guang Wang Wei(Key Laboratory of Fundamental Science for National De fence of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, Liaoning 110136, China Welding Institute, Shenyang Liming Aero-Engine （Group） Corporation Ltd. , Shenyang, Liaoning 110043, China)

机构地区：[1]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,辽宁沈阳110136 [2]沈阳黎明航空发动机(集团)有限责任公司焊接研究所,辽宁沈阳110043

出　　处：《应用激光》2017年第3期327-332,共6页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:51375316);航空科学基金资助项目(项目编号:2014ZE54028);辽宁省高等校科学研究一般资助项目(项目编号:L2014054)

摘　　要：采用有限元方法模拟研究了基体预热下多道多层激光沉积修复GH4169合金温度场和残余应力的分布及变化规律。结果表明,基体经300℃预热后,修复区温度梯度明显减小;Von Mises热应力最大降幅为13.2%,x方向热应力最大降幅为12.9%,y方向热应力最大降幅为20.1%。进行了在相同条件下激光沉积修复试验和应力测试,残余应力模拟结果与测试结果最大误差为8.6%,表明模拟与测试结果是基本吻合的。Finite element method are applicated to simulate and study the distribution and variation of temperature field and residual stress of GH4169 alloy of multi-track and multi-layer under LDr.Results show that：after 300℃ preheating temperature gradient of the deposition zone is significantly reduced.The biggest decline of Von Mises thermal stress is 13.2percent,and the x-direction is 12.9percent and the y-directiona is 20.1percent.Under the same conditions,the laser deposition repair test and stress test were carried out.The maximum error of residual stress simulation results and test results is 8.6percent,and the results show that the simulation results are in agreement with the test results.

关 键 词：激光沉积修复 GH4169 局部预热 温度梯度 热应力 

分 类 号：TG249[金属学及工艺—铸造]