GH4037镍基高温合金激光打孔相变过程数值模拟  

Numerical simulation of phase transition process of laser drilling on GH4037 nickel-based superalloy

作　　者：王琪琪[1] 任乃飞[1] 任旭东[1] WANG Qiqi;REN Naifei;REN Xudong(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学机械工程学院,镇江212013

出　　处：《激光技术》2018年第6期764-768,共5页Laser Technology

基　　金：国家重点研发计划资助项目(2011CB013004);江苏省高校自然科学研究资助项目(11KJA460003;15KJD460002);江苏省科技支撑计划资助项目(BE2015037);江苏省高校"青蓝工程"资助项目(苏教师[2016]15号);江苏省"六大人才高峰"资助项目(2013-ZBZZ-025)

摘　　要：为了更准确地研究激光打孔相变过程,基于流体传热和流体力学理论,建立了GH4037镍基高温合金激光打孔相变模型。模型中考虑了重力、粘滞力、反冲压力的作用,以及材料的固-液相变和液-气相变过程,通过数值计算得到了激光打孔相变过程的温度场和速度场。结果表明,气化材料的反冲压力可以加快熔池的流动,在激光功率为2000W、脉宽为1. 70ms时,材料最大气化蒸发速率可以达到250m/s。该模型为进一步开展激光打孔研究提供了理论基础。In order to study the phase transformation process of laser drilling more accurately,based on the theories of fluid heat transfer and fluid mechanics,a phase transition model of laser drilling on GH4037 nickel-based superalloy was established.In the model,the effect of gravity,viscous force,recoil pressure,solid-liquid phase transition and liquid-gas phase transition process were considered,and the temperature field and velocity field of laser drilling phase transition process were obtained by numerical calculation.The results show that,the reaction pressure of the gasification material can accelerate the flow of the molten pool.When the laser power is 2000W and the pulse width is 1.70ms,the maximum evaporation rate of the material can reach 250m/s.This model provides a theoretical basis for further research on laser drilling.

关 键 词：激光技术 激光打孔 数值模拟 GH4037镍基高温合金 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]