Study on Induction Plasma Spheroidization Process of Niobium Alloy Powder for Additive Manufacturing AITranslate

Basic Information:

DOI：

Chinese Library Classification Number:TB31[一般工业技术—材料科学与工程]

Citation Information:

Niobium alloy is widely used in aerospace and nuclear industry because of its high melting point,excellent high-temperature performance and low density.For the production of complex-shaped or thinwalled components in these applications,additive manufacturing technology has obvious advantages.In this paper,the spheroidization process and mechanism of spherical niobium alloy powder for additive manufacturing were analyzed through theoretical calculations.And the influences of particle size and atmosphere temperature on the spheroidization process were obtained.The results show that the heating and melting process of the particles during spheroidization takes much longer than the droplet spheroidization process,making it the limiting step in the spheroidization process.Increasing the atmosphere temperature and reducing the particle size are both beneficial for spheroidization of particles.Subsequently,using Nb521 alloy powder as the raw material,the effects of spheroidization power and carrier gas flow rate on the powder spheroidization rate were further investigated through high-frequency induction plasma spheroidization experiments.The results indicate that both increasing the spheroidization power and decreasing the carrier gas flow rate improve the powder spheroidization rate,and the spheroidization rate exceeds 95% when the spheroidization power is 80 kW and the carrier gas flow rate is 5 L/min.