Transactions of Materials and Heat Treatment

Title：Forging process of key parts in aluminum alloy cylinder for aero-engine

Authors： Qiu Lei Cai Jingkai Sun Min Zheng Li

Unit： Shenyang Liming Aero Engine Co. Ltd. Shenyang University of Technology

KeyWords： forging extrusion aero-engine cylinder aluminum alloy 2A70 numerical simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2018,43(4):16-21

Abstract：

Taking the key components of aluminum alloy 2A70 cylinder for an aero-engine as the research object, the forgings crack at the edge and corner usually in the actual production, and the cracks extend to the center of forgings, which leads to a low qualified rate of products. In order to solve the above problem, the preformed blank of flattening was replaced by extrusion and then followed by a final forging. In addition, three-dimensional finite element models of the current process of flattening+final forging and the promoted process of extrusion+final forging were built, and their forming processes were analyzed. The simulation results show that the process of extrusion+final forging reduces stress-strain concentration at the corner area and eliminates crack and hole defects, and the material flow is more reasonable. The experimental verification shows that the process of extrusion+final forging also reduces folding in the non-machined surface and crack at edge and corner occurred in the current process of flattening+final forging, and the grain sizes are uniformity in all area of final forgings. Thus, the material utilization of the forgings increases from 51% to more than 79.5%.

Funds：

国家自然科学基金资助项目（51605307）；辽宁省教育厅一般项目（LGD2016020）

邱磊(1980-)，男，学士，工程师；E-mail：24801558@qq.com；通讯作者：郑黎（1981-），男，博士，讲师；E-mail:zhengli_1115@163.com

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