Study on Process Parameters of Coaxial Laser Melt Injection with Spherical WC Reinforcement Particles

doi:10.3901/JME.2021.07.253

Abstract

Abstract: A movement model and a thermal model of the reinforcement particles are built to study the temperature of particles with different laser power, WC particle diameters and particle initial velocity in the processes of the coaxial laser melt injection. The critical conditions of WC particle diameters, laser power and particle initial velocity are studied to achieve coaxial laser melt injection preparation of the WC particle reinforced metal matrix composite coating, and the WC particle with different diameters have been chosen to inject into 316 stainless steel. The calculation and experimental results show that when scanning speed is 6 mm/s, powder feeding rate is 10 g/min, the laser power density is 119 W/mm², in order to ensure remaining the particles solid state, the particles diameter is proper to be larger than 75 μm under the current coaxial powder feeding nozzle and laser process parameters. To ensure injecting WC particles without melting, the particles diameter is proper to be less than 75 μm and the laser power density has to be reduced below 95 W/mm².

Key words: coaxial laser melt injection, reinforcement particles, numerical calculation, spherical WC

CLC Number:

TG111
TN249

WANG Liang, LUO Jian, HU Yong, XIA Hongchao, YAO Jianhua. Study on Process Parameters of Coaxial Laser Melt Injection with Spherical WC Reinforcement Particles[J]. Journal of Mechanical Engineering, 2021, 57(7): 253-261.

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