Transactions of Materials and Heat Treatment

Title：Process improvement on eliminating spinning cracks for a certain engine housing

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ClassificationCode：TG376.3

year,vol(issue):pagenumber：2022,47(1):115-118

Abstract：

The thin-walled and long-shaped engine housing is a key component of projectiles and arrows, and the material used is D6AE high-strength alloy steel. Before spinning, the blank is subjected to spheroidizing annealing treatment, and during the power spinning process, mass circumferential cracks appear on the cylinder body, which are fish-scale-like and extending from the inner cavity to the outer surface along the wall thickness direction, and the crack positions are concentrated. In order to solve the above problem, based on the theories of power spinning mechanism, forming process and heat treatment process, etc., the morphology, generating location and spinning stress state of cracks were analyzed to obtain the root cause of the cracks, and the best solution scheme obtained by improving the spinning process without increasing the cost was chosen, which improved the stress state in the crack generation stage to reduce the stress. Thus, the crack source was completely eliminated to avoid major economic losses in this solution scheme, which provided a good technical foundation for mass production of engine housing.

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作者简介：廉国安（1966-），男，学士，研究员级高级工程师 E-mail：1192330036@qq.com

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