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Evaluation of cryogenic treatment to improve sealing performance in SUS316 tube fittings, suggesting an alternative to carburizing.
The stainless steel SUS316 tube fitting is widely used in the fluid industries, and the carburizing process is often used to improve the sealing and assembling performance. This study evaluates the feasibility of applying a cryogenic treatment to replace the carburizing process. After cryogenic treatment, the assembling torque value, the contact surface roughness, and the grain size number of the tube fitting are reduced. Further, leaking resistance pressure and hardness are improved, and pipe engaging is smoother and drag marks are reduced. These results demonstrate that cryogenic treatment can effectively enhance the tube fitting sealing and assembling performance and may replace the carburizing process.
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Hsiung et al. (2022) studied this question.
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