TA15钛合金厚板热轧变形有限元模拟研究  

Finite Element Simulation Research of Hot Rolling Deformation of TA15 Titanium Alloy Thick Plate

作　　者：安震 孙泽辉 刘兵 齐铭 丁旭 AN Zhen;SUN Ze-hui;LIU Bing;QI Ming;DING Xu(School of Materials Engineering,Xi′an Aeronautical Institute,Xi′an 710077,China)

机构地区：[1]西安航空学院材料工程学院,西安710077

出　　处：《西安航空学院学报》2022年第1期65-70,共6页Journal of Xi’an Aeronautical Institute

基　　金：西安市科技计划-高校人才服务企业项目(2019217314GXRC009CG010-GXYD9.3);教育部第二批产学合作协同育人项目(201902004015);国家级大学生创新创业训练项目(S202011736024)。

摘　　要：根据不同应变速率下TA15钛合金的真应力应变曲线、通过Arrehenius公式和设定关于Z参数的应变补偿,建立有效的TA15钛合金的高温变形本构方程,实验验证本构方程的计算值和实验值之间的差异很小,最大误差在10%以内。在得到的本构方程的基础上,借助塑性变形模拟软件对TA15钛合金厚板热轧变形过程进行有限元模拟,通过三因素三水平正交实验得到了设定变形条件下的最佳工艺参数:预热温度为950℃、轧辊转速设为3.6 rad/s、摩擦系数设为0.3,三个因素中对轧制模拟影响最大是摩擦系数。通过变形系数验证了变形模拟结果的有效性,在轧制过程中没有出现宽展过大,咬入困难等问题。According to the true stress-strain curves of TA15 titanium alloy at different strain rates,the effective high temperature deformation constitutive equation of TA15 titanium alloy was established through Arrhenius formula and setting the strain compensation about Z parameters.The experimental results show that the difference between the calculated and experimental values of the constitutive equation is very small,and the maximum error is less than 10%.Base on the constitutive equation,the hot rolling deformation process of TA15 titanium alloy thick plate was simulated by finite element method with the help of plastic deformation simulation software.The optimal process parameters under the set deformation conditions were obtained through three factor and three-level orthogonal experiment:the preheating temperature is 950 ℃,the roll speed is set to 3.6 rad/s and the friction coefficient is set to 0.3.Among the three factors,the friction coefficient has the greatest influence on the rolling simulation.The validity of the deformation simulation results is verified by the deformation coefficient.There are no problems such as excessive width spread and difficult biting in the rolling process.

关 键 词：TA15钛合金 流变应力 本构方程 轧制 有限元模拟 

分 类 号：V274[航空宇航科学与技术—飞行器设计] V211