搭接率对TC4多道熔覆NiCrCoAlY热循环特性的影响  

Influence of Lap Ratio on Thermal Cycle Characteristics of TC4 Multi-Channel Cladding NiCrCoAlY

作　　者：王旭祥 祁文军[1] 左小刚 Wang Xuxiang;Qi Wenjun;Zuo Xiaogang(School of Mechanical Engineering,Xinjiang University,Urumqi,Xinjiang 830047,China;Xinjiang Joinworld Company Limited,Urumqi,Xinjiang 830047,China)

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047 [2]新疆众合股份有限公司,新疆乌鲁木齐830047

出　　处：《应用激光》2022年第12期45-52,共8页Applied Laser

摘　　要：为了提高材料的使用寿命,探究搭接率对多道激光熔覆层性能的影响机理,解决制约激光熔覆技术在工业领域广泛应用的关键性问题——熔覆面积,基于SYSWELD软件平台,采用3D高斯热源分布模型,在TC4钛合金表面通过激光熔覆模拟制备NiCrCoAlY合金的三道搭接涂层,讨论不同搭接率对三道熔覆温度场和热循环特性的影响。结合试验,获得TC4钛合金激光熔覆NiCrCoAlY涂层的最佳搭接率。结果表明,搭接率30%为最优参数;随着搭接率的提高,前两道熔覆层发生二次熔化及相变的区域增大,熔覆层表面不平整且容易出现裂纹。In order to improve the service life of materials, the influence mechanism of lap ratio on the performance of multi-channel laser cladding layer was investigated, and the key problem restricting the wide application of laser cladding technology in the industrial field-cladding area was solved. In this paper, based on SYSWELD software platform and 3 D Gaussian heat source distribution model, three lap coatings of NiCrCoAlY alloy were prepared by laser cladding on the surface of TC4 titanium alloy. The effects of different lap rates on the temperature field and thermal cycle characteristics of the three lap coatings were discussed. Combined with experiments, the optimum bonding ratio of laser cladding NiCrCoAlY coating on TC4 titanium alloy was obtained. Results show that the optimal parameter is the lap rate of 30%. With the increase of lap ratio, the area of secondary melting and phase transformation of the first two cladding layers increases, and the cladding layer surface is uneven and prone to crack.

关 键 词：钛合金 激光熔覆 温度场 SYSWELD 多道搭接 

分 类 号：TG456[金属学及工艺—焊接]