Analysis and distortion control optimization of carburization and quenching for spacecraft gears

doi:10.13251/j.issn.0254-6051.2024.07.004

Abstract

Abstract: According to the chemical composition of the steel for a spacecraft power gear, the thermal-physical property parameters of the material were calculated by means of JMatPro simulation software. Based on the gear model and heat treatment process parameters, carburizing and quenching simulation analysis was carried out in Deform finite element software to determine the change of carbon content on the tooth surface during carburizing process, and the change of microstructure of the gear teeth during quenching process. Finally, according to the characteristics of herringbone gears and the precision control requirements of spacecraft gears, the distortion of the gear teeth after quenching is optimized by changing the quenching process parameters. The results show that when the quenching process is pre-cooling in air for 30 s, quenching in hot oil at 80 ℃ for 1200 s and then deep cooling at -100 ℃ for 7200 s, the amount of distortion is controlled better and meets the product requirements.

Key words: CSS-42L steel, herringbone gear, heat treatment, carburization, quenching, distortion control

CLC Number:

TG142.3

Yang Kai, Wang Pengpo, Zhang Yumei, Zeng Hong, Zhang Bin, Wang Tianming, Ma Yuliang, Wang Yanzhong. Analysis and distortion control optimization of carburization and quenching for spacecraft gears[J]. Heat Treatment of Metals, 2024, 49(7): 22-28.

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