DEPOSITION OF DUPLEX Cr3 C2-NiCr COATINGS ON STEEL USING A COMBINED TECHNIQUE OF GAS DETONATION SPRAYING AND PULSE-PLASMA TREATMENT
Rakhadilov B. Tyurin Y. Kakimzhanov D. Baizhan D. Kolisnichenko O. Zhurerova L.
2021Begell House Inc.
High Temperature Material Processes
2021#25Issue 425 - 37 pp.
Sintered chromium carbide–nickel-chromium alloys are widely used to protect machine parts operated in extreme conditions. In this research, a duplex technology was studied, which includes the deposition of Cr3 C2-NiCr coatings using a multichambered detonation device and subsequent pulse-plasma treatment (PPT). It was determined that PPT promotes a decrease in the surface roughness and friction coefficient of the coating (approximately two times), an increase in the microhardness of the Cr3 C2-NiCr coating material from 12 GPa (initial) to ~ 16.2 GPa, and an increase in wear resistance by two times compared to an untreated coating. It was also revealed that after the pulse-plasma treatment, the resistance of Cr3 C2-NiCr coatings to abrasive wear and erosion increases. The proposed duplex technology ensures the formation of high-quality coatings from a cermet material of the Cr3 C2-NiCr system with a complex heterogeneous structural-phase state, where a layered structure of regions of carbide particles and matrix metal was found in the immediate vicinity of the carbide-matrix interface with precipitates in the matrix of dispersed secondary carbides.
cermet coatings , coating modification , detonation spraying , hardness , pulse-plasma treatment , wear resistance
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Sarsen Amanzholov East Kazakhstan University, Ust-Kamenogorsk, Kazakhstan
E.O. Paton Electric Welding Institute, National Academy of Sciences of Ukraine, Kiev, Ukraine
PlasmaScience LLP, Ust-Kamenogorsk, Kazakhstan
Institute of Composite Materials, Ust-Kamenogorsk, Kazakhstan
Sarsen Amanzholov East Kazakhstan University
E.O. Paton Electric Welding Institute
PlasmaScience LLP
Institute of Composite Materials
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