FORMATION OF COMPOSITE BORIDE COATING ON STEEL AT MICROARC THERMOCHEMICAL TREATMENT
https://doi.org/10.17073/0368-0797-2015-3-214-215
Abstract
Plasticity increase of steel products after diffusion boriding was achieved by the formation of the composite heterogeneous structures in the surface layer. Boriding was carried out by microarc heating. Coating was applied on the surface of the item of low carbon steel containing boric acid. Then it was plunged into coal powder and was heated by electric current. Composite coating with the depth of 0.2 mm was formed as a result of treatment. It consists of the areas of eutectoid mixture with microhardness of 4500 – 4700 MPa and boride eutectic with microhardness of 15.0 – 17.0 HPa. The carburized area with eutectoid structure was formed under the composite layer. It passed to the original ferritepearlite structure.
About the Authors
Yu. M. Dombrovskii
Don State Technical University 1, Gagarina sqr., Rostov-on-Don, 344010, Russia
Russian Federation
Dr. Sci. (Eng.), Professor
Russian Federation
Dr. Sci. (Eng.), Professor
M. S. Stepanov
Don State Technical University 1, Gagarina sqr., Rostov-on-Don, 344010, Russia
Russian Federation
Cand. Sci. (Eng.), Assist. Professor
Russian Federation
Cand. Sci. (Eng.), Assist. Professor
References
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2. Krukovich M.G., Prusakov B.A., Sizov I.G. Plastichnost’ borirovannykh sloev [Plasticity of borated layers]. Moscow: FIZMATLIT, 2010. 384 p. (In Russ.).
3. Dombrovskii Yu.M., Stepanov M.S. Microarc cementation of steel items in powder medium. Uprochnyayushchie tekhnologii i pokrytiya. 2013, no. 12, pp. 25–29. (In Russ.).
Review
For citations:
Dombrovskii Yu.M., Stepanov M.S. FORMATION OF COMPOSITE BORIDE COATING ON STEEL AT MICROARC THERMOCHEMICAL TREATMENT. Izvestiya. Ferrous Metallurgy. 2015;58(3):214-215. (In Russ.) https://doi.org/10.17073/0368-0797-2015-3-214-215
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