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Effect of cooling rate during quenching on the properties of carbon steel

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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    With increasing cooling rates up to 6 deg/sec during quenching of medium-carbon structural steels there is a sharp increase in the strength characteristics, the reduction in section, the fatigue limit, and the resistance to impact elongation.

  2. 2.

    At cooling rates of about 6 deg/sec the properties of the steels with different carbon concentrations differ greatly.

  3. 3.

    The ratio of the yield strength to ultimate strength changes little with increasing cooling rates above 6 deg/sec.

  4. 4.

    With low cooling rates the fracture toughness at 20°C differs for medium-carbon structural steels with different carbon concentrations; the fracture toughness is almost identical after cooling at the rate of 45 deg/sec.

  5. 5.

    The fatigue limit and the resistance to impact elongation increase substantially with the cooling rate. The steels with an elevated carbon content have better properties at all cooling rates.

  6. 6.

    The data obtained can be used to select the optimal cooling conditions for thermal hardening of massive parts of medium-carbon steels.

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Literature cited

  1. F. Weber et al., Atlas zur Warmebechandlung der Stahle, Dusseldorf (1958).

  2. “Hardening heat treatment of rolled steel,” Reports at the Conference of Young Scientists, November, 1964, in Dnepropetrovsk [in Russian], No. 24, Metallurgiya, Moscow (1966).

  3. I. V. Radchenko, Zavod. Lab., No. 9 (1945).

  4. E. Davenport, J. of Metals,9, No. 5 (1957).

  5. A. V. Velikanov et al., in: Metal Science and Heat Treatment, No. 4 [in Russian], Mashinostroenie, Moscow (1966).

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Authors
  1. I. G. Uzlov
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  2. N. I. Danchenko
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Additional information

Institute of Ferrous Metallurgy, Dnepropetrovsk. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 54–56, May, 1971.

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Uzlov, I.G., Danchenko, N.I. Effect of cooling rate during quenching on the properties of carbon steel. Met Sci Heat Treat 13, 407–409 (1971). https://doi.org/10.1007/BF00652450

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  • DOI: https://doi.org/10.1007/BF00652450

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