(1. 中国科学院 金属研究所,沈阳110016;2. 宝钛集团有限公司,宝鸡 721014)
摘 要: 运用弹塑性有限元方法对钛合金开坯锻造过程进行三维热力耦合模拟,分析不同条件下各过程中温度、应力和应变的空间分布变化规律。模拟研究发现,道次变形量对开坯效果有着重要影响,变形量太小则会产生搓皮现象;连续锻造过程中两锤之间的重叠对应变分布及坯料质量有着重要影响,接缝处表面附近应变较大,而芯部应变较小,非接缝区域应变分布与之相反,应调整锻锤重叠区域以提高产品质量;方坯锻造应力应变有叠加效应,控制不当将影响产品质量甚至导致缺陷。在综合讨论分析的基础上,对钛合金开坯锻造工艺设计提出调整建议。
关键字: 钛合金;锻造;有限元模拟
(1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. Baoti Group Co., Ltd., Baoji 721014, China)
Abstract:The forging process of TA15 ingot was investigated using three dimensional thermal-mechanical coupled simulations based on finite element method. The forging process was optimized on the bases of deformation and strain analysis after the simulation under different deformation condition, hammer overlapping, and forging process.
Key words: Ti alloy; forging; TEM simulation