基于钛丝高频感应熔化气雾化制粉工艺的熔化数值模拟及实验研究  

Numerical Simulation and Experimental Research on the Melting of Titanium Wire Based on Induction Heating Gas Atomization

作　　者：郑明月 张少明[1] 胡强[1] 徐骏[1] 毛卫民[2] 贺会军 刘英杰 盛艳伟 赵文东 Zheng Mingyue;Zhang Shaoming;Hu Qiang;Xu Jun;Mao Weimin;He Huijun;Liu Yingjie;Sheng Yanwei;Zhao Wendong(Beijing General Research Institute for Nonferrous Metals, Beijing 100088,China;University of Science and Technology Beijing, Beijing 100083,China;Beijing COMPO Advanced Technology Co., Ltd, Beijing 101407,China)

机构地区：[1]北京有色金属研究总院,北京100088 [2]北京科技大学,北京100083 [3]北京康普锡威科技有限公司,北京101407

出　　处：《稀有金属材料与工程》2019年第6期1819-1828,共10页Rare Metal Materials and Engineering

基　　金：国家高技术研究发展计划(“863”计划)(2015AA042501)

摘　　要：采用数值模拟和实验验证相结合的方法研究了增材制造用钛粉的新型制备工艺--钛丝高频感应熔化气雾化技术(wire induction heating gas atomization, WIGA)的钛丝感应熔化部分。数值模拟得到了钛丝感应熔化模型的最优参数:感应线圈的夹角为90°;电源输出频率为450 k Hz;线圈最优单匝直径为8 mm。钛丝直径选定为4 mm,形成长度为15 mm金属液流的临界送丝速度为45 mm/s。在此条件下,金属液产生350±50℃过热度时电源的临界输出功率为34 kW。建立氩气保护氛围的钛丝感应熔化实验装置,通过实验研究得到TC4钛丝形成长度为15 mm液流的临界送丝速度为50 mm/s,实验值与模拟值误差为10.0%。在此条件下,熔体产生350±50℃过热度时,电源的临界输出功率为38 kW,实验值与模拟值误差为10.5%。实验结果与模拟结果相互验证,得到了钛丝熔化的工程应用数据。A new preparation process for titanium powder for additive manufacturing, wire induction heating gas atomization(WIGA) was developed. The combination of numerical simulations and experimental investigations was used to investigate the high frequency induction melting of titanium wire. The numerical simulations obtained the optimal parameters of the titanium wire induction melting model, i.e. the angle of the induction coil 90°, the power output frequency f 450 kHz, the diameter of the titanium wire 4 mm, and the minimum wire feed speed 45 mm/s when forming a 15 mm length of metal flow. Under this condition, the critical output power is 34 kW when the molten metal generates 350±50 ℃ of superheat. An argon atmosphere protective titanium melting experimental device was established. Through experimental investigations, the minimum TC4 wire feed speed is found to be 50 mm/s when forming a 15 mm length of metal flow, and the error between the experimental and the numerical simulation is 10.0%. Under this condition, the minimum output power of the power supply is 38 kW when generating a molten metal with a superheat of 350±50℃, and the experimental and numerical simulation error is 10.5%. The experimental and numerical simulation results prove each other, and the engineering application basis of high frequency induction melting of titanium wire is obtained.

关 键 词：增材制造 钛丝高频感应熔化气雾化 熔化模型 数值模拟与实验研究 

分 类 号：TG146.23[一般工业技术—材料科学与工程]