激光沉积修复BT20钛合金成形特性及其组织  

Forming Properties and Microstructures of BT20 Titanium Alloy by Laser Deposition Repair

作　　者：王维[1] 蔡淦[1] 钦兰云[1] 杨光[1] 卞宏友[1] 王伟[1] 

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

出　　处：《航空制造技术》2015年第5期85-88,共4页Aeronautical Manufacturing Technology

摘　　要：采用激光沉积修复方法对BT20钛合金锻件误加工和服役造成的损伤进行修复,观察成形件宏观形貌特点,分析宏观形貌影响因素。使用光学显微镜观察试件内部组织特点,指出内部组织形成原因;对沉积过程中缺陷特点以及产生的原因进行说明,并给出减少缺陷的方法。Laser deposition repair of the BT20 titanium alloy forgings＇ mis-machining defects and service damage is researched. The macroscopic appearance is observed and the factors are given. The internal microstructure characteristics by optical microscopy are showed and the reasons are investigated. The feature and causes of the defects in the deposition layers are studied and the methods to reduce defects are provided.

关 键 词：BT20钛合金 激光沉积修复 气孔 熔合不良 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]