SURFACE HARDENING OF THE TOOLS BY NITROOXIDATION
DOI:
https://doi.org/10.61841/k8dyth56Keywords:
diffusion nitride layer, nitrooxidation, surface oxide layer, zone of internal nitriding.Abstract
In order to increase the corrosion resistance and wear resistance as well as the resistance of cutting tools made of high-speed steels, the article presents the results of the study of the possibility of using a combined method of surface hardening, consisting in nitriding in ammonia at the first stage and oxidation of the nitride layer in water vapor at the second stage. The formation of a thin dense oxide film consisting of one magnetite and a dense nitride layer under it as well as the following zone of internal nitriding were studied on the surface to be strengthened. It is studied that the combined process at the first stage at pre-eutectoid temperature for the system "Fe-N" taking into account the temperature intervals of martensitic transformation of residual austenite and at the second stage at pre-eutectoid temperature for the system Fe-O at tempering temperature intervals allows to obtain a diffusion nitride-oxide layer with the necessary structures and properties on the surface of high-speed steels.
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References
[1] Novikov I.I. Theory of heat treatment of metals. -M .: Metallurgizdat, 1978. -390 p.
[2] Lakhtin Yu.M., Kogan Ya.D. Nitriding steel. - M.: Mashinostroenie, 1976 .- 256 p.
[3] Lakhtin Yu.M., Kogan Ya.D. The structure and strength of nitrided alloys. - M., Metallurgy, 1982, -
176 p.
[4] Chatterjee-Fisher et al. Nitriding and carbonitriding. Per. with him. - M.: Mechanical Engineering,
1990. - 278 p.
[5] Zysk Ya., Tatsikovskiy Ya., Sulkovskiy I. Formation of diffusion layers during gas nitriding // Metal science and heat treatment of metals. 1980, No. 6. -p. 12-15.
[6] Gladkova E.N. Theoretical foundations and technology of steam thermal oxidation. - Saratov, Saratov Polytechnic Institute - 1973. -123 p.
[7] Kogan Y.D., Eshkabilov Kh.K. Oksiazotirovanie metall products. //Hardening technologies and coatings. 2006, No. 6. - p.10-15.
[8] Lakhtin Yu.M., Kogan Ya.D., Bulgach A.A. The influence of alloying elements on the thermodynamic activity and solubility of nitrogen in the phases of the nitrided layer. //Metallurgy and heat treatment of metals. 1982, No. 4. –p. 15-18.
[9] Alexandrov V.A., Bogdanov K.V. Nitriding tools made of high-chromium and high-speed steels.
//Hardening technologies and coatings. 2005. No. 5. -p. 14-20.
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