TC21钛合金镦锻变形过程有限元模拟仿真  

Finite Element Simulation of Upsetting Deformation Process for TC21 Titanium Alloys

作　　者：厉文墨 康强 滕艾均 秦海旭 郭杰 马知未 LI Wenmo;KANG Qiang;TENG Aijun;QIN Haixu;GUO Jie;MA Zhiwei(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China;Chengdu Advanced Metallic Materials Industry Technology Research Institute Co.,Ltd.,Chengdu 610300,Sichuan,China)

机构地区：[1]鞍钢集团北京研究院有限公司,北京102200 [2]成都先进金属材料产业技术研究院股份有限公司,四川成都610300

出　　处：《鞍钢技术》2024年第6期110-115,共6页Angang Technology

摘　　要：采用有限元模拟仿真技术,对TC21钛合金镦锻变形过程进行三维实体的热力耦合建模,分析了不同变形量下工件温度场、等效应力场、损伤值的变化规律。结果表明,在变形过程中,工件心部应力分布不均并存在温度升高现象,且随着变形量的增大,工件大变形区域面积逐渐增大,心部温度升高现象加剧,变形温度可升高20℃;镦锻变形后TC21钛合金损伤区域主要集中于工件两端的鼓肚处,当变形量由30%增加至70%时,鼓肚变形程度逐步加重,工件最大损伤值逐渐由0.127增大至0.443。为避免缺陷产生,工业生产时应严格控制工件镦锻变形量。By using finite element simulation technology,the modeling based on thermo-mechanical coupling with three dimensional entity for the upsetting deformation process of TC21 titanium alloys was carried out,and then the variation laws of temperature fields,equivalent stress fields and damage values in terms of the workpieces under different deformations were analyzed.The analytical results showed that during the deformation process,the distribution of stresses in the cores of the workpieces was uneven and where there was a phenomenon of temperature rising,while the areas of the large deformation regions of the workpieces gradually increased with increasing of the deformation amount and the phenomenon of temperature rising in the core was so intensified that the deformation temperature could be increased by 20℃.After upsetting or forging deformation,the damaged areas of TC21 titanium alloys mainly concentrated on the bulges at both ends of the workpieces.When the deformation amount increased from 30%to 70%,the bulging deformation degree gradually intensified,and the maximum damaged values of the workpieces gradually increased to 0.443 from 0.127.And therefore in order to avoid the generation of defects,the amount of upsetting deformation should be strictly controlled in industrial production.

关 键 词：TC21钛合金 模拟仿真 镦锻变形 损伤值 

分 类 号：TG3[金属学及工艺—金属压力加工] TP3[自动化与计算机技术—计算机科学与技术]