Conclusions
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1.
The mechanical properties of heat treated steels depend on the hydrogen concentration in the furnace atmosphere: the higher the hydrogen concentration, the more the mechanical properties are impaired. The change in mechanical properties depends on the chemical composition of the steel and the type of test.
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2.
To increase the reliability and durability of critical machine parts the controlled atmosphere used for heat treatment should have the lowest permissible hydrogen concentration.
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Literature cited
A. A. Shmykov, Metal. i Ter. Obrabotka Metal., No. 5 (1967).
G. V. Karpenko and R. I. Kripyakevich, Effect of Hydrogen on the Properties of Steel [in Russian], Metallurgizdat, Moscow (1962).
L. S. Moroz and B. B. Chechulin, Hydrogen Embrittlement of Metals [in Russian], Metallurgizdat, Moscow (1967).
A. D. Hotchkiss and H. M. Webber, Protective Atmospheres [Russian translation], Mashgiz, Moscow (1959).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 36–38, November, 1968.
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Sheindlin, B.E. Effect of hydrogen in furnace atmospheres on the mechanical properties of steels. Met Sci Heat Treat 10, 885–886 (1968). https://doi.org/10.1007/BF00649216
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DOI: https://doi.org/10.1007/BF00649216