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Metal Science and Heat Treatment

, Volume 12, Issue 10, pp 867–871 | Cite as

The increase in the strength of teeth of carburized and carbonitrided gears

  • I. Ya. Arkhipov
  • M. S. Polotskii
  • A. Ya. Novikova
  • S. A. Yurasov
  • V. F. Nikonov
Chemicothermal Treatment
  • 41 Downloads

Conclusions

  1. 1.

    In carburizing and carbonitriding of alloy steels (Cr, Cr−Ni−W, Cr−Mn−Ti, Cr−Mo, Cr−Ni−Mo, Cr−Mn−Mo) a surface layer is formed consisting of decomposition products of austenite in the pearlitic or intermediate region (the result of internal oxidation of alloying elements and inclusions of submicroscopic carbonitride inclusions).

     
  2. 2.

    The depth of the layer with a structure of nonmartensitic decomposition products and its hardness depend on the composition of the steel and the cooling rate during quenching. In steels containing molybdenum the decomposition products have a higher hardness.

     
  3. 3.

    The fatigue strength in bending of carburized and carbonitrided gears depends on the microhardness of the surface in the valleys of the teeth and increases with the microhardness.

     
  4. 4.

    In alloying of steel intended for carburizing and carbonitriding one must keep in mind the susceptibility of alloying elements to internal oxidation and formation of carbonitrides.

     

Keywords

Oxidation Fatigue Austenite Surface Layer Molybdenum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. 1.
    A. Hultgren and E. Hagglund, Trans. Am. Soc. Met.,39 (1947).Google Scholar
  2. 2.
    A. T. Kalinin and A. Ya. Novikov, in: Modern Techniques of Heat Treating Machine Parts, Vol. 1 [in Russian], Mashinostroenie, Moscow (1965).Google Scholar
  3. 3.
    J. Marty and G. Meyhet, Harterei Technische Mitteilungen, No. 1 (1963).Google Scholar
  4. 4.
    B. Przhenosil, Carbonitriding [in Russian], Mashgiz, Moscow (1969).Google Scholar
  5. 5.
    S. Gunnarson, Harterei Technische Mitteilungen, No. 1 (1963).Google Scholar
  6. 6.
    H. Wiegand and G. Tolasch, Werkstatt und Betrieb, No. 5 (1966).Google Scholar
  7. 7.
    I. S. Kozlovskii et al., Metal. i Term. Obrabotka Metal., No. 3 (1967).Google Scholar
  8. 8.
    G. Robinson, Fatigue Durability of Carburized Steel, ASM (1957).Google Scholar
  9. 9.
    A. V. Verkhovskii et al., Determining Stresses in Critical Sections of Machine Parts of Complex Form [in Russian], Mashgiz, Moscow (1958).Google Scholar

Copyright information

© Consultants Bureau, a division of Plenum Publishing Corporation 1971

Authors and Affiliations

  • I. Ya. Arkhipov
  • M. S. Polotskii
  • A. Ya. Novikova
  • S. A. Yurasov
  • V. F. Nikonov

There are no affiliations available

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