The Paton Welding Journal, 2000, №02

2000 №02 (08)

2000 №02 (10)

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The Paton Welding Journal, 2000, #2, 35-38 pages

Structure, properties of hypereutectoid graphitized roll steel after plasma hardening

S.S. Samotugin

Priazov State Technical University, Mariupol, Ukraine

Abstract
Structure, hardness, impact toughness and character of fracture of hypereutectoid steel 150KhNM under dynamic loading after plasma hardening, as compared with volumetric quenching, are investigated. Hardness and impact toughness of steel after plasma hardening are higher than after volumetric quenching, which is caused by a highly dispersed martensite-carbide structure formed by plasma treatment. Fracture of metal of the hardened zone occurs by the mechanism of dispersed quasi-cleavage, while that of metal after surface micro- and macro-melting occurs by the mechanism of intercrystalline cleavage.
Keywords: surface plasma hardening, graphitized roll steel, акте. service properties, character of fracture

References

1. Leshchinsky, L.K., Samotugin, S.S., Pirch, LI. et al. (1990) Plasma surface hardening. Kyiv: Tekhnika.
2. Samotugin, S.S. (1996) Plasma treatment of tool materials. Avtomaticheskaya Svarka, 8, 48 - 51.
3. Leshchinsky, L.K., Samotugin, S.S., Goritsky, B.M. et. al. (1996) Structure and crack resistance of deposited metal 18Kh6GMFS after plasma hardening. Ibid., 8, 31 - 35.
4. Samotugin, S.S., Kovalchuk, A.V., Solyanik, N.Kh. et al. (1996) Structure of tough fracture of high-strength pearlite-cementite cast iron after plasma treatment. Metallovedenie i Term. Obrabotka Metallov, 4, 2 - 6.
5. Samotugin, S.S. (1997) Fracture toughness of hard alloys hardened by plasma treatment. Fizika i Khimiya Obrabotki Materialov, 4,45 - 51.
6. Rudnyuk, S.I., Mikhailova, I.V., Tomenko, Yu.S. (1990) Effect of alloying and heat treatment on properties of hypereutectoid roll steels. Metallovedenie i Term. Obrabotka Metallov, 4, 21 - 24.
7. Samotugin, S.S., Solyanik, N.Kh., Puiko, A.V. (1994) Properties of tools steels in plasma hardening with surface melting. Svarochnoye Proizvodstvo, 11, 20 – 24.

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Suggested Citation

S.S. Samotugin (2000) Structure, properties of hypereutectoid graphitized roll steel after plasma hardening. The Paton Welding J., 02, 35-38.

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