Conclusion
On the basis of the results of the investigation, the following regimes of softening heat treatment can be recommended for the forming of bellows of alloy 36NKhTYu in two operations: preliminary quenching from 920°C (10 min)+intermediate quenching from 940°C (10 min); this was confirmed by practice in the production of bellows.
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Literature cited
I. G. Dobrovol'skii and V. S. Shlyakhovoi, "Forming bellows in two operations," Metallurgiya (Minsk), No. 20, 84–87 (1986).
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I. G. Dobrovol'skii and V. S. Shlyakhovoi, "Demands on the technological ductility of the material for tubular blanks for bellows," Metallurgiya (Minsk), No. 19, 9–11 (1985).
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Authors' certificate 825658 USSR, MKI S 21 D 8/00. Method of Producing Elastic Elements.
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Belorussian Polytechnic Institute, Research Institute Teplopribor, Smolensk. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 6–7, January, 1991.
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Dobrovol'skii, I.G., Khonyak, T.M. & Shlyakhovoi, V.S. Heat treatment of blanks in forming bellows in two operations. Met Sci Heat Treat 33, 10–11 (1991). https://doi.org/10.1007/BF00775024
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DOI: https://doi.org/10.1007/BF00775024