锻压技术

TC17合金整体叶盘等温锻造过程数值模拟及工艺参数影响

英文标题：Influence of process parameters and numerical simulation on

作者：王波伟唐军曾卫东张帅秦卫东

分类号：TG146.2

出版年,卷(期):页码：2017,42(6):7-11

摘要：

采用二维有限元模拟软件Deform-2D对TC17钛合金整体叶盘锻件的等温β模锻过程进行数值模拟，分析了整体叶盘不同部位的应变场。根据有限元模拟结果对TC17钛合金整体叶盘锻件的荒坯尺寸及工艺参数进行优化，并进行了TC17钛合金等温锻造成形工艺试验。试验结果表明，等温β模锻工艺可使TC17钛合金组织中粗大原始β相晶粒得到充分的形变，晶界析出弯曲、断续的细小α相，晶内析出交错、细小的次生α相，呈现理想的网篮组织；当应变达到0.75时，可使得整体叶盘锻件的强度、塑性及断裂韧性实现理想匹配。

The isothermal forging process of integral blisk for titanium alloy TC17 in β zone was numerically simulated by twodimensional (2D) finite element (FEM) software Deform2D, and the distributions of equivalent strain fields in different parts of integral blisk were studied. Then, the process parameters and the size of wasted billet were optimized based on the results of FEM simulation, and the experiments of isothermal forging process of titanium alloy TC17 were carried out. The experiment results show that the initial coarse β phase grains of titanium alloy TC17 are fully deformed, and the bending and intermittent small α phases are precipitated in grain boundary. However, the interlaced and slender ideal secondary α phases are precipitated in intracrystalline to exhibit the basketweave microstructure after the isothermal forging process. The strength, plasticity and fracture toughness of the integral blisk forging can be matched ideally when the strain reaches 0.75.

基金项目：

陕西省科技创新项目（20146102120054）

王波伟（1983-），男，硕士，工程师

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