Simulation of jet-flow solid fraction during spray forming  

作　　者：Zi-qiang Pi Xin Lu Yuan Wu Lu-ning Wang Cheng-chang Jia Xuan-hui Qu Wei Zheng Li-zhi Wu Qing-li Shao 

机构地区：[1]Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China [2]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China [3]Heye Special Steel Co., Ltd., Shijiazhuang 052165, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2017年第6期657-669,共13页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National High-Tech Research and Development Program of China (No. 2012AA03A509);the National Natural Science Foundation of China (No. 51204015)

摘　　要：A numerical model was developed to simulate the jet-flow solid fraction of W18Cr4 V high-speed steel during spray forming. The whole model comprises two submodels: one is an individual droplet model, which describes the motion and thermal behaviors of individual droplets on the basis of Newton's laws of motion and the convection heat transfer mechanism; the other is a droplet distribution model, which is used to calculate the droplet size distribution. After being verified, the model was used to analyze the effects of parameters, including the initial gas velocity, deposition distance, superheat degree, and the ratio of gas-to-metal mass flow rates, on the jet-flow solid fraction. Finally, an equation to predict the jet-flow solid fraction directly and conveniently according to the parameters was presented. The values predicted by the equation show good agreement with those calculated by the numerical model.A numerical model was developed to simulate the jet-flow solid fraction of W18Cr4 V high-speed steel during spray forming. The whole model comprises two submodels: one is an individual droplet model, which describes the motion and thermal behaviors of individual droplets on the basis of Newton's laws of motion and the convection heat transfer mechanism; the other is a droplet distribution model, which is used to calculate the droplet size distribution. After being verified, the model was used to analyze the effects of parameters, including the initial gas velocity, deposition distance, superheat degree, and the ratio of gas-to-metal mass flow rates, on the jet-flow solid fraction. Finally, an equation to predict the jet-flow solid fraction directly and conveniently according to the parameters was presented. The values predicted by the equation show good agreement with those calculated by the numerical model.

关 键 词：modeling STEEL SPRAY FORMING SOLID FRACTION 

分 类 号：TF124.39[冶金工程—粉末冶金]