采用数值模拟方法分析影响VAR熔炼钛合金铸锭表面质量的因素  

Computational Simulation of Factors Affecting Surface Quality of Titanium Alloy Ingot in VAR Process

作　　者：罗文忠[1] 赵小花[1] 刘鹏 吴伟 何永胜[1] 王凯旋[1] 郝芳[1] Luo Wenzhong;Zhao Xiaohua;Liu Peng;Wu Wei;He Yongsheng;Wang Kaixuan;Hao Fang(Western Superconducting Technologies Co.,Ltd,Xi'an 710018,China)

机构地区：[1]西部超导材料科技股份有限公司,陕西西安710018

出　　处：《稀有金属材料与工程》2020年第3期927-932,共6页Rare Metal Materials and Engineering

摘　　要：采用数值模拟方法分析影响铸锭表面质量的因素,借此达到提高铸锭成品率的目的。通过Melt Flow软件对VAR熔炼过程的温度场进行分析,将高温液相与坩埚接触长度与表面质量建立联系。分析得出,从工艺角度考虑,熔炼电流、稳弧电流以及稳弧周期这3个因素对铸锭表面质量有影响,结合实验验证表明,采用较大的熔炼电流、大稳弧电流以及短稳弧周期有利于铸锭表面质量提高,提高成品率。With the development of titanium alloy industry, the cost control of titanium alloy products has become an important competitive power. The yield rate of titanium alloy ingots is closely related to the ingot’s surface quality. In this paper, the factors affecting the surface quality of ingots were analyzed by numerical simulation method to improve the yield rate. We used Melt Flow VAR software to analyze the temperature field in VAR process;the relationship between the surface quality and the contact length, which represents the distance between the high temperature liquid phase and crucible wall was established. It is concluded that the three factors, melting current, stirring coils current and period have effects on the surface quality of ingots. The experiment results show that the higher melting current, the greater stirring coils current and the shorter coils current period are beneficial to improve the surface quality and yield rate of ingots.

关 键 词：VAR 数值模拟 钛合金 表面质量 

分 类 号：TG146.23[一般工业技术—材料科学与工程]