激光快速成形修复薄壁盘环零件的有限元分析  

Finite Element Analysis on Thin Wall Ring Part During Laser Rapid Repair

作　　者：王凯[1] 杨海欧[1] 林鑫[1] 黄卫东[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《热加工工艺》2012年第11期210-212,215,共4页Hot Working Technology

基　　金：中国博士后科学基金项目(20090461312);西北工业大学基础研究基金项目(NPU-FFR-JC200808);凝固技术国家重点实验室(西北工业大学)自主研究课题(16-TZ-2007,39-QZ-2009和05-BZ-2010)

摘　　要：针对航空中应用的钛合金薄壁盘环零件激光快速成形修复(LRR),建立了3D参数化有限元模型,分析了修复过程中薄壁盘环件的应力和变形演化规律。计算结果表明,应用LRR技术可以成功地实现对薄壁盘环零件的修复。彻底冷却后,修复件的残余应力属于低残余应力水平,零件水平薄壁与竖直薄壁交界处的残余拉应力较大,修复件的整体变形也比较小,两薄壁均在靠近其外端部位置的变形量比其内部要大。冷却阶段的应力分布与熔覆刚完成时的应力分布规律基本相同。随成形修复过程的进行,薄壁修复件的最大变形量增大,冷却时,修复件最大变形量随时间的增加而逐渐减小。A corresponding 3D parametric finite element models was developed to analyze the stress and deformation of titanium alloy thin-walled ring part for aviation applications during laser rapid repair （LRR）.The simulation results show that LRR technology can successfully achieve the repair of thin-wall ring part.The residual stress of the part is lower after LRR.The position that horizontal thin-wall and vertical thin-wall contact has maximum residual stress after completely cooling.Integral deformation of the part is also small finally;the edges of both thin walls have larger deformation than their internal.The stress distribution of cooling stage is similar to that completed cladding.The maximum deformation of the part gradually increases during laser repairing process,while the maximum deformation decreases during cooling after LRR.

关 键 词：激光快速成形修复 有限元分析 应力 变形 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG146.23[一般工业技术—材料科学与工程]