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Increasing rest ance to fatigue by annealing cold-hardened steel


  1. 1.

    The annealing of cold-hardened springs increases their limit strength 9–10%.

  2. 2.

    The annealing temperature for automotive valve springs which results in maximum resistance to fatigue is 175°C. If the springs are heated to higher temperatures the resistance to fatigue decreases, and at 425°C the effect of cold hardening is completely eliminated.

  3. 3.

    The annealing temperature resulting in the maximum increase of resistance to fatigue of cold-hardened steel depends on the type of steel, the type of deformation, and on the conditions under which the springs operate. Therefore the annealing temperature must be determined for each particular case.

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Literature cited

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    C. Lipson, "Steel", 1951. No. 6.

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    N. A. Karasev, Vestnik mashinostroeniya, 1951, No. 1.

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    F. Limmerli, "Metal Progress", 1952, No. 6.

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    H. Fichs and E. Hutchinson, "Mach. Design", 1958, No. 3.

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    N. P. Shchapov, In Coll: Increase in Resistance to Fatigue of Machine Parts by Surface Treatment [in Russian]. Mashgiz. 1952.

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    I. V. Kudryavtsev, in Coll: Investigation of the Strength of Steels [in Russian], TsNIIT MASh, Book 40. Mashgiz, 1951.

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    M. M. Khrushchov, D. S. Listgarten, and I. S. Bogatyrev, Zavodskaya laboratoriya, 1951, No. 1.

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    O. O. Kulikov, in Coll: New Investigations of Machine Construction Materials [in Russian], TsNIIT MASh. Book 49. Mashgiz, 1952.

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Additional information

TsNIITMASh, Gor'kovskii Avtomobil'nyi Zavod Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 5–7, January, 1963

L. D. Golubovskaya (GAZ) and L. N. Burmistrova (TsNIIT MASh) participated in this work.

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Kudryavtsev, I.V., Sveshnikov, D.A. Increasing rest ance to fatigue by annealing cold-hardened steel. Met Sci Heat Treat 5, 3–5 (1963).

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  • Fatigue
  • Maximum Increase
  • Limit Strength
  • Maximum Resistance
  • Cold Hardening