Transactions of Materials and Heat Treatment

Title：Additive-forging composite manufacturing technology for process boss of aircraft slide

Authors： Sun Chaoyuan1 2 Xiong Yibo3 Liu Dejian2 Liu Yang2 Li Pengchuan2 Cheng Liwei2 Zhou Jie1

Unit： 1.Chongqing University 2. China National Erzhong Wanhang Die Forging Co. Ltd. 3. Huazhong University of Science and Technology

KeyWords： 30CrMnSiNi2A steel aircraft slide process boss arc fuse additive-forging

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(2):1-9

Abstract：

In order to solve the problems of underfilling and folding of process boss in the forging process of 30CrMnSiNi2A steel slide forgings for an aircraft, an additive-forging composite manufacturing technology was proposed. First, 30CrMnSiNi2A steel was used as flux cored wire, and the process boss was produced on the slide rail forgings by the arc fuse technology. Then, the component was forged integrally to achieve the forging of the whole component. Finally, the low and high magnification microstructure observation and mechanical property inspection were carried out on the heat treated additive area and the connection area between adding material and forgings. The results show that after the additive-forging composite manufacturing, the process boss in the additive area of component is completely filled, and the grain size reaches grade seven or higher, which is equivalent to the grain size of the integrated forgings. However, there are obvious defects such as porosity and inclusion in some areas, which lead to the serious decline of mechanical properties in this area. The tensile strength, yield strength, elongation and impact toughness of the sample without obvious defects at low magnification are equivalent to those of the forgings while the specimen with obvious defects fails early during the test, and its performance is significantly lower than that of the forgings.

Funds：

国家重点研发计划（2018YFB1106501）

作者简介：孙朝远（1986-），男，博士研究生，高级工程师，E-mail：cysun316@163.com；通信作者：周杰( 1965-)，男，博士，教授，E-mail：zhoujie@cqu.edu.cn

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