Effects of Structure of Nozzle on Gas Atomization for Laser Cladding Alloy Powders
GUO Shi-rui1,2, YAO Jian-hua1,2, CHEN Zhi-jun1,2, LOU Cheng-hua1,2, WU Han-feng1,2
1. Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology(Ministry of Education), Zhejiang University of Technology, Hangzhou 310014, China;
2. Research Center of Laser Processing Technology and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Abstract：Focus on the question of producing specific powers for laser cladding by gas atomization, adjusted the ratio of powder material, compared to the original nozzle, the atomization experiments were carried on to produce nickel-based powder of laser cladding by improved supersonic nozzle. The results show that the gas-atomizing nozzle is an important factor in the process of gas atomization. With the improvement of structure of nozzle, the particle mean diameters, volume mean diameters and Sauter mean diameters decrease. In other words, the particle size decreases. Meanwhile, the powders have better fluidity, larger apparent density and efficient atomization efficiency, which meet the requirements of laser cladding.
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