等离子球化钨、镍二元金属合金数值模拟  

Modeling and Simulation of Plasma Spheroidizing Tungsten and Nickel Binary Alloy

作　　者：侯玉柏 于月光 郭志猛 HOU Yubai;YU Yueguang;GUO Zhimeng(Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;BGRIMM Technology Group,Beijing 100160,China;Beijing Key Laboratory of Special Coating Materials and Technology,Beijing 102206,China)

机构地区：[1]北京科技大学新材料技术研究院,北京100083 [2]矿冶科技集团有限公司,北京100160 [3]特种涂层材料与技术北京市重点实验室,北京102206

出　　处：《有色金属工程》2020年第12期1-8,共8页Nonferrous Metals Engineering

基　　金：国家重点研发计划项目(2017YFB0305800)。

摘　　要：首次使用SPH(Smoothed Particle Hydrodynamics)方法,对等离子球化过程中钨、镍颗粒间的碰撞融合进行模拟仿真。分析不同成分配比、不同粒度组成、不同温度情况下,钨、镍颗粒在表面张力作用下的运动情况及球化过程中颗粒内部致密度和球形度变化过程,选出了最优的参数。结果表明,当镍粉平均粒径4.3μm、钨粉平均粒径1.6μm作为等离子球化原料,按照钨粉与镍粉质量比80∶20进行喷雾干燥造粒,在温度8000℃条件下进行等离子球化,球化效果良好,验证了模拟仿真结果。The Smoothed Particle Hydrodynamics(SPH)is used for the first time to simulate the collision and fusion process of W and Ni powders during plasma spheroidization.This work summarizes the movement of W and Ni powders under the surface tension and the changes of density and sphericity in the internal part of the particles.The optimal spheroidization parameters for composition ratio,particle size and temperature are presented.The veracity of the simulation results is proved by the high spheroidization based on W-Ni alloy with W∶Ni mass ratio of 80∶20 and particle sizes of Ni 4.3μm and W 1.6μm at 8000°C.

关 键 词：SPH 模拟仿真 等离子球化 致密度 

分 类 号：TG146[一般工业技术—材料科学与工程]