Conclusions
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1.
The N36KhTYuM8 alloy has a rather high resistance to relaxation for several hundred hours at 350°C without any preliminary stressing.
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2.
Coil springs made of this alloy can be operated 500 h at 500°C or higher provided that the conditions of heat treatment and preliminary stress are correctly chosen; the stress decreases 20%.
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3.
The magnitude of the preliminary stress should be no higher than 0.8 of the yield strength.
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4.
The duration of preliminary stress should correspond to the time of the intial section of the relaxation curve. The duration of preliminary stress should be increased with increasing temperature.
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Literature cited
V. A. Sol'ts and M. A. Nosan'. TsNIIChM Collection: Precision Alloys [in Russian], No. 22, Metallurgizdat (1959).
I. A. Oding and V. Z. Tseitlin, DAN SSSR,71, No. 5 (1950).
V. Z. Tseitlin, Kotloturbostroenie, No. 1 (1952).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 35–40, January, 1964
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Tseitlin, V.Z., Morozov, N.D. Resistance of the N36KhTYuM8 alloy to relaxation. Met Sci Heat Treat 6, 31–34 (1964). https://doi.org/10.1007/BF00661969
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DOI: https://doi.org/10.1007/BF00661969