Transactions of Materials and Heat Treatment

Title：Cold spinning law on superalloy GH4169 conical casing

Authors： Ding Ling1 2 Gao Xianshen1 2 Lu Xinxue1 2 Sun Baoshou1 2 Shu Xuedao1 2

Unit： 1. Ningbo University 2. Zhejiang Provincial Key Laboratory of Parts Roll Forming Technology Research

KeyWords： nickel-based superalloy conical casing cold spinning equivalent stress equivalent plastic strain wall thickness

ClassificationCode：TG306

year,vol(issue):pagenumber：2023,48(2):135-141

Abstract：

Aiming at the defects such as cracks and surface ripples during the spinning process due to serious work hardening phenomenon at room temperature of superalloys, for the conical casing component, the law of cold spinning was studied. Then, based on the Simufact platform, a finite element model was established, and the change laws of equivalent stress and equivalent plastic strain, the distribution characteristics of wall thickness and the influences of process parameters (pass spacing p, rotary wheel feeding ratio f, mandrel rotate speed n) on the wall thickness of spinning parts for casting component during the multi-pass spinning process were simulated and analyzed by combining simulation and experiment. Furthermore, the forming laws were revealed. The results show that the equivalent stress and equivalent plastic strain in zone I of the top plate zone of workpiece suddenly change along the radial direction, and a certain stress concentration and deformation appear in the middle and late stages of edge. The equivalent stress and equivalent plastic strain in the zone V of inclined wall area are distributed in layers along the axial direction and evenly distributed along the circumferential direction, and gradually increase with the increasing of rotary wheel feeding and number of passes, and the maximum value is located in the zone IV at the end of workpiece. The wall thickness in the zone V of inclined wall area generally shows a trend of decreasing first and then increasing, and the middle part is excessively thinned, and the wall thickness in the zone IV at the end of workpiece reaches the maximum value. The uniformity of wall thickness shows an upward trend with the increasing of rotary wheel feeding ratio and pass spacing, and the mandrel rotate speed has no significant effect on the wall thickness. The experimental results are consistent with the simulation analysis, which verifies the reliability of the simulation research.

Funds：

国家自然科学基金资助项目（51975301）；浙江省自然科学基金重点项目（LZ22E050002）；宁波市重大科技专项（2022Z002）

作者简介：丁玲（1997-），女，硕士研究生，E-mail：513562849@qq.com；通信作者：孙宝寿（1960-），男，硕士，副教授，E-mail：sunbaoshou@nbu.edu.cn

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