电磁搅拌辅助钛合金激光沉积修复的电磁场模拟与验证  

Numerical simulation and verification of electromagnetic field in titanium alloy laser deposition repair with electromagnetic stirring

作　　者：王维[1] 刘奇[1] 杨光[1] 钦兰云[1] 岳耀猛 

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

出　　处：《红外与激光工程》2015年第9期2666-2671,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(51305280);辽宁省高校创新团队(LT2011004)

摘　　要：利用自行研制的电磁搅拌装置辅助钛合金激光沉积修复,通过有限元软件ANSYS进行数值模拟,并与试验相结合,研究了钛合金激光熔池内"磁-电-力"的相互作用关系。结果表明,在旋转磁场的作用下,激光熔池内的液体表面磁感应强度与激励电流成正比,与频率成反比;激光熔池受到径向力和切向力的作用,但是前者较小,可以忽略不计,液体横截面上电磁力密度最大值与激励电流成正比。在旋转磁场的作用下激光沉积修复件表面两侧凸起且修复层内部组织α/β片层长径比减小。Using the self-developed electromagnetic stirring device to assist titanium alloy laser deposition repair, numerical simulation was carried on by finite element software ANSYS, the interaction relations of titanium alloy in laser molten pool was studied combined with experiment. The results show that the magnetic flux intensity on liquid surface is proportional to the excitation current and inversely proportional to the current frequency in laser molten pool with the influence of rotary magnetic field; the laser molten pool is impacted by the radial force and tangential force, but the former is lesser and it can be neglected, the maximum of electromagnetic force density on liquid cross-section is proportional to the excitation current. Surface on both sides of laser deposition repair parts bulge under the effect of rotating magnetic field and length to diameter ratio of lamellar α/β in laser repaired zones reduced.

关 键 词：电磁搅拌 BT20钛合金 电磁场 数值模拟 显微组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]