锻压技术

Ni-Cr-W-Mo合金曲母线异型件多道次热旋成形数值模拟

英文标题：FEM numerical simulation on multi-pass heat spinning for curvilinear-shape irregular workpiece of superalloy Ni-Cr-W-Mo

作者：孙琳琳孟培媛胡锐刘守法

单位：西京学院西北工业大学

关键词：高温合金热旋成形曲母线异型件 ABAQUS 旋轮圆角半径旋轮进给比

分类号：TG302

出版年,卷(期):页码：2017,42(10):96-100

摘要：

针对热旋成形过程中起旋断裂以及边缘开裂等零件质量问题，基于ABAQUS/Explicit平台建立了Ni-Cr-W-Mo高温合金曲母线异型件多道次热旋弹塑性有限元模型，研究了多道次热变形过程中的应力、应变规律以及缺陷形成机制，探讨了工艺参数对第2道次热旋成形过程的影响规律，最后通过实验验证了模型的可靠性。结果表明：在第1道次热旋过程中，由于应力差的存在，很容易使板材内外表面产生不均匀变形，甚至拉裂；在第2道次成形过程起始阶段（2～5 s 内），等效应变增大过快，易出现材料堆积及起皱现象；此外，当旋轮圆角半径(R=10 mm)及旋轮进给比（f=1.0 mm·r-1）过大时，均会导致旋压件产生褶皱现象。

For some quality problems of rupture at the beginning of spinning and fracture on the edge of workpiece during the heat spinning process, an elastic-plastic FEM model of multi-pass heat spinning for curvilinearshape irregular workpiece of superalloy Ni-Cr-W-Mo was established by ABAQUS /Explicit, and the distribution features of stress and strain fields and the mechanism of defect formation in the multi-pass heat deformation process were analyzed. Then, the influences of process parameters on the second pass of heat spinning were further discussed, and the reliability of model was validated by experiment at last. The results show that due to the large differences of stress, uneven deformation easily appears inside or outside surface of plate, even fracture in the first pass of heat spinning. However, at the beginning stage of the second pass of heat spinning (2-5 s), the equivalent strain increases quickly, and the stack and wrinkle of material can be formed easily. In addition, when the rotary wheel fillet radius (R=10 mm) and rotary wheel feed ratio (f=1.0 mm·r-1 ) are large enough, the workpiece trends to wrinkling easily.

基金项目：

陕西省教育厅专项科研计划项目（15JK2172）；西京学院科研基金项目（XJ160223）

作者简介：孙琳琳（1985-），女，博士，讲师，E-mail：linlin030201@163.com

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