Transactions of Materials and Heat Treatment

Title：Optimization on forging process for spray formed 7055 aluminum alloy aircraft wheel hub based on response surface method

Authors： Yang Xingwang Tao Zhiwei Yuan Kai Huang Yao Wang Leigang

Unit： Jiangsu University Jiangsu Haoran Spray Forming Alloy Co. Ltd.

KeyWords： aircraft wheel hub spray forming 7055 aluminum alloy hot die forging preforming response surface method

ClassificationCode：TG319

year,vol(issue):pagenumber：2022,47(10):23-28

Abstract：

For the problems such as incomplete filling of wheel hub forgings and mold wear caused by the complex shape of aircraft wheel hub, in the wheel hub forging for a certain type of aircraft take-off and landing system, spray formed 7055 aluminum alloy extruded rod was used,and the hot die forging method was taken by adding a design of forgings preforming. Taking final forging filling rate and final forging force of forgings as the optimization goal and billet pre-forging reduction amount, billet heating temperature, mold preheating temperature and mold pressing speed as the design variables, the response surface model was established. Then, the process parameters of wheel hub forgings were optimized by the combination of the second-order response surface method and Design Expert software, and the optimal parameters were determined as the billet pre-forging reduction amount of 45.30 mm, the billet preheating temperature of 430 ℃, the mold preheating temperature of 447 ℃ and the mold pressing speed of 5.00 mm·s-1. The production verification shows that the improved preforming scheme and process parameters can solve the problem of incomplete filling and produce qualified products under the lower final forging force.

Funds：

国家自然科学基金资助项目（51775249）

杨兴旺(1995－)，男，硕士研究生，E-mail：1286953517@qq.com；通信作者：王雷刚(1963－)，男，博士，教授，博士生导师，E-mail：lgwang@mail.ujs.edu.cn

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