Transactions of Materials and Heat Treatment

Title：Influence of process parameters on residual stress for TC4 alloy aero-engine blade in precision forging

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ClassificationCode：X263.5;V263.1

year,vol(issue):pagenumber：2020,45(1):9-14

Abstract：

In order to obtain the distribution of residual stress in the precision forging of blade, the precision forging process of TC4 alloy aero-engine blade was simulated numerically by software Simufact.Forming, and the residual stress on the surface of blade entity was measured by X-ray diffraction technique. Then, the numerical simulation results were compared to verify the rationality of the finite element model, and the precision forging process of blade was optimized by designing orthogonal experiment. Finally, the optimal combination of process parameters and the influence trend of different process parameters on the residual stress of blade in precision forging were obtained. The results show that the residual stress of aero-engine blade in precision forging is mainly concentrated on the surface layer. When the process is poor, the areas of high residual stress near the leading edge and the trailing edge of blade are larger, and the risk factor of cracking is higher. Furthermore, the mold temperature has the greatest influence on the residual stress of blade in precision forging, and the influences of upper mold speed, billet temperature and friction factor on the residual stress decrease successively. Thus, the smaller residual stress of blade in precision forging is obtained with the upper mold speed of 40 mm·s-1, the billet temperature of 960 ℃, the mold temperature of 300 ℃ and the friction factor of 0.1.

Key words: aero-engine blade; TC4 alloy; precision forging; residual stress; X-ray diffraction; orthogonal experiment

Funds：

国家自然科学基金资助项目（51475146，51475366）

吴捍疆（1992-），男，硕士研究生 E-mail：764649866@qq.com 通讯作者：张丰收（1972-），男，博士，教授 E-mail：fengshouzhang@163.com

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