Cause Analysis and Regulation Feasibility of the Yellow Spots on the Surface of QBe2 Spring Tubes
ZHU Liang1, GE Shenghong2,3, SHEN Qifeng3, WU Heng3, TAO Haijun1,*
1 College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China 2 College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 3 AVIC Nanjing Servo Control System Co., Ltd., Nanjing 211100, China
Abstract: The domestic QBe2 bar was used to produce servo spring tube by a company. In the final inspection, it was found that there was macula in the thin wall, which seriously affected the appearance quality and performance of the spring tube. To explore the above problems, scanning electron microscope (SEM), electron probe microanalyzer (EPMA) and transmission electron microscope (TEM) were used to characterize and analyze the causes of macular formation, and explore the feasibility of homogenization annealing process on its regulation. It is found that the macula on the surface of the part is β phase, and its existing form is not affected by the machining and heat treatment process in the manufactu-ring process. The test results show that it already exists in the hard (solid solution+drawing) raw material bar. In the later stage, pre-annealing at 605 ℃ for 6 h+homogenization annealing at 860 ℃ for 100 h can promote the diffusion of be element in β phase in raw materials, so as to achieve the purpose of eliminating β phase.
朱亮, 葛声宏, 沈琪峰, 吴恒, 陶海军. QBe2弹簧管表面黄斑成因分析及调控可行性研究[J]. 材料导报, 2026, 40(4): 25020087-6.
ZHU Liang, GE Shenghong, SHEN Qifeng, WU Heng, TAO Haijun. Cause Analysis and Regulation Feasibility of the Yellow Spots on the Surface of QBe2 Spring Tubes. Materials Reports, 2026, 40(4): 25020087-6.
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2026, Vol. 40 
