Conclusions
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1.
To obtain even strength in pump-compressor and casing pipe of steel 45 it is possible to conduct a single heat treatment of the threaded ends.
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2.
The optimal conditions were determined for single treatment of the ends of steel 45 pipe—quenching from 830–900° in compressed air under a pressure of 3.0–2.5 atm. In this case rapid cooling is interrupted at 350–400°.
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Literature cited
I. A. Useinov, B. A. Akhmedov, and É. M. Éfendiev, "Thermal hardening of the ends of casing and pump-compressor pipe," Stal', 3, 254 (1971).
A. A. Popov and A. E. Popova, "T-T-T and C-C-T diagrams," in: Heat Treatment Handbook [in Russian]. Mashgiz, Moscow (1961).
G. F. Golovin and M. M. Zamyatin, High-Frequency Heat Treatment [in Russian], Mashinostroenie, Leningrad (1968).
F. N. Tavadze et al., "Investigation of cooling devices for quenching the ends of pipe with air," Tekhnicheskaya Informatsiya, Gruz. NIINTI, 7 (1969).
A. P. Gulyaev, Heat Treatment of Steel [in Russian], Mashgiz, Moscow (1953).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 57–59, June, 1973.
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Isaev, Y.G., Éfendiev, É.M. Thermal hardening of the ends of casing and pump-compressor pipe of steel 45. Met Sci Heat Treat 15, 508–510 (1973). https://doi.org/10.1007/BF01153278
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DOI: https://doi.org/10.1007/BF01153278