Conclusions
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1.
The work of crack propagation increases when the tempering temperature for quenched carbon structural steels is raised from 400 to 600°.
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2.
With tempering of quenched carbon steels to the same hardness the impact toughness and work of crack propagation at room temperature vary little with a change of the carbon content from 0.3 to 0.5%.
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Literature cited
A. P. Gulyaev et al., "Mechanics of failure in impact bending tests," in: Metal Science and Heat Treatment, Yu. M. Lakhtin and G. N. Dubinin, eds. [in Russian], NTO MAShPROM, No. 5, Mashinostroenie, Moscow (1968), p. 64.
Ya. R. Rauzin and A. V. Velikanov, "Modern methods of determining impact toughness," Metal. i Term. Obrabotka Metal., 6, 28 (1970).
S. E. Kovchik et al., "Effect of heat treatment on resistance of some steels to crack nucleation and propagation," Fiz.-Khim. Mekhan. Mat.,8, 5, 33 (1972).
Additional information
Grozny Petroleum Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 66–67, January, 1975.
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Makhukov, N.G. Impact toughness of carbon steels. Met Sci Heat Treat 17, 72–73 (1975). https://doi.org/10.1007/BF00663096
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DOI: https://doi.org/10.1007/BF00663096