QBe2弹簧管表面黄斑成因分析及调控可行性研究

doi:10.11896/cldb.25020087

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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.

Key words： spring tube QBe2 β phase in-situ characterization homogenization annealing

Published: 25 February 2026 Online: 2026-02-13

CLC number:	TG164.1
	TG166.2

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	Articles by authors
	ZHU Liang
	GE Shenghong
	SHEN Qifeng
	WU Heng
	TAO Haijun

Cite this article:

ZHU Liang,GE Shenghong,SHEN Qifeng, et al. Cause Analysis and Regulation Feasibility of the Yellow Spots on the Surface of QBe2 Spring Tubes[J]. Materials Reports, 2026, 40(4): 25020087-6.

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https://www.mater-rep.com/EN/10.11896/cldb.25020087 OR https://www.mater-rep.com/EN/Y2026/V40/I4/25020087

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