THE EFFECTS of DIFFERENT HEAT TREATMENT and COATING TECHNIQUES on X120CrMo29-2 MARTENSITIC STAINLESS STEEL

Year 2022, Issue: 049, 62 - 73, 30.06.2022

Esad Kaya , Mustafa Ulutan , Ahmet Akbulut

Abstract

This research article investigated the effects of various heat treatment and coating processes on the tribological performance of X120CrMo29-2 martensitic stainless steel materials. The effects of deep cryogenic treatment, plasma nitriding, and high-velocity oxy-fuel (HVOF) thermal spraying methods on microstructural, mechanical, and tribological properties were investigated. The as-quenched condition was taken as the reference group. In the experimental studies, it was observed that the wear resistance of the deep cryogenic heat treated and coated samples were improved 1,2-6,7 times in comparison to the reference group. In terms of microstructure and mechanical properties, more homogeneous general structural hardness was obtained in the deep cryogenically treated samples, while high surface hardness values (980 HV100gf,10 sec) were found in coated samples. In terms of tribological properties, it was observed that the wear resistance of the coated samples was higher than the deep cryogenically treated samples. It is seen that nitride coatings have superior tribological properties to the HVOF sprayed sample. The lowest coefficient of friction (COF) and highest wear resistance was observed in plasma nitrided samples.

Keywords

Wear, Friction, Tribology, Coatings, Nitriding

Supporting Institution

ATAP A.Ş. ve İGSAŞ

Project Number

69592

Thanks

This study was carried out with the project permission of ATAP A.Ş. and the R&D division of the İGSAŞ company with code 69592. The authors are thankful for the great support of Er&Mir Makine Ltd., which provided the plasma nitriding process.

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