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

WANG Qiqi; REN Naifei; REN Xudong

doi:10.7510/jgjs.issn.1001-3806.2018.06.007

LASER TECHNOLOGY > 2018 > 42(6): 764-768. > DOI: 10.7510/jgjs.issn.1001-3806.2018.06.007

WANG Qiqi, REN Naifei, REN Xudong. Numerical simulation of phase transition process of laser drilling on GH4037 nickel-based superalloy[J]. LASER TECHNOLOGY, 2018, 42(6): 764-768. DOI: 10.7510/jgjs.issn.1001-3806.2018.06.007

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

School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

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Received Date: January 07, 2018
Revised Date: February 05, 2018
Published Date: November 24, 2018

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Abstract

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.
- laser technique,
- laser drilling,
- numerical simulation,
- GH4037 nickel-based superalloy

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