Effect of Heat Treatment at Different Temperatures on The Structural and Tribological Properties of Electroless Ni-B Coated 32CrMoV12-10 Alloy

Authors : Erdoğan Koray Özyurt, Muharrem Pul
Pages : 135-149
Doi:10.52795/mateca.1638437
View : 57 | Download : 72
Publication Date : 2025-04-30
Article Type : Research Paper
Abstract :In this article, Ni-B (nickel-boron) plating process was performed on 32CrMoV12-10 barrel material, which is widely used in the defense industry and produced by forging method, by electroless plating method in aqueous solution prepared in a bath. The coated samples were then heating process at 250, 300, 350 and 400C temperatures. The effects of these heat treatments on tribological and microstructural properties were investigated. Cauliflower-like surface structure was formed on all coated samples. In XRD analysis, it was observed that an amorphous structure was formed in the sample heating processat 250°C in argon environment. The highest hardness was measured on the surface of the sample heating processat 350°C in argon environment, while the lowest hardness was measured on the surface of the sample with amorphous structure and heating process at 250°C in argon environment. It was observed that there was a notable increase in the wear endurance of the samples heating process at 300°C, 350°C and 400°C in argon environment. It was concluded that heat treatment in an open atmosphere causes oxidation at the steel interface, which prevents the diffusion of nickel into the steel in the plating process. The surface roughness of the sample heating process at 250°C in an amorphous argon atmosphere was higher than all other samples. The best surface roughness value was obtained at the argon atmosphere 350°C treatment conditions. When all the data supporting each other are brought together, it is determined that the most suitable heat treatment temperature is at 350°C in argon atmosphere instead of high temperature heat treatment after Ni-B plating process on an industrial scale.
Keywords : 32CrMoV12-10 alaşımı, Akımsız kaplama, Nikel-Bor kaplama, Isıl işlem, Mekanik özellikler, Triboloji

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