Transactions of Materials and Heat Treatment

Title：Manufacture of aluminum alloy 2219 integral ring with 9 m ultra-large diameter

Authors： Xu Kunhe Zhang Wenxue Yang Daijun Zhang Guofang Li Yaojun Liu Dong

Unit： Capital Aerospace Machinery Company Jiangsu Guoguang Heavy Machinery Co. Ltd. Wuxi Paike Heavy Casting and Forging Co. Ltd. Northwestern Polytechnical University

KeyWords： round ingot integral ring aluminum alloy 2219 multiple forging ring rolling

ClassificationCode：TG316.2

year,vol(issue):pagenumber：2016,41(10):92-97

Abstract：

In order to meet the need of ultra-large diameter aluminum alloy 2219 integral ring for the new-generation launch vehicles, the forging and integral ring rolling process for the large size aluminum alloy 2219 integral round ingot was studied, and the aluminum alloy 2219 integral ring with 9 m ultra-large diameter was successfully manufactured. For the technical problems of fragile eutectic compound, refining the microstructure and controlling the roundness of ultra-large diameter ring, the deformation degree of ingot is enhanced, the size of grains is refined, and the coarse eutectic compound is broken down by optimizing the multiple forging process, so the mechanical properties of ring are greatly improved. By optimizing ring rolling forming process, problems of the poor rigidity of thin-wall aluminum ally ring, plastic instability and lose of the overall roundness are overcome, the roundness and size of ultra-large diameter aluminum alloy ring can be controlled accurately, and the cooperative control of shape-property for aluminum alloy 2219 integral ring with 9 m ultra-large diameter is realized.

Funds：

作者简介：徐坤和（1969-），男，学士，研究员 E-mail：xukunhe@sina.com

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