Generally, the Cr-Ni austenite stainless steels have high corrosion resistance and good weldability, but are not used as wear-resistant material due to their low hardness. The studies were carried out to enhance the wear resistance of deposited hardfacing metals of the stainless steel by shielded metal arc welding, maintaining its superior properties at high levels. The hardfacing metals of the medium carbon Cr-Ni austenite stainless steel were deposited, using electrodes coated with flux including C and strong carbide-forming elements (Cr, Mo, V) on 18Cr-8Ni stainless steel wire. In an as-welding state, the matrix phases and precipitation of carbides in hardfacing metals were investigated, using X-ray diffraction, scanning electron microscopy, and energy-dispersive spectrometry. The surface hardness (HB) and microhardness (HV) of the metals were measured. It was found that carbides formed by Cr, Mo, and V were precipitated a lot in the austenite matrix and at the grain boundaries; thus, the surface hardness of deposited hardfacing metals was about HB 300–500, enough for high wear resistance while maintaining austenite (γ) phase as the matrix, and the effectiveness investigated by simple corrosion wear experiments.
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The authors would like to express their gratitude to the editors, the authors of the references and the reviewers for their helpful suggestions for improvement and publication of this paper.
The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by Kim Chaek University of Technology, Pyongyang, Democratic People’s Republic of Korea.
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Paek, D.S., Jong, C.B. Investigation of carbide precipitations on microstructure and hardness of medium carbon Cr-Ni austenite stainless hardfacing deposit with high wear resistance properties. Weld World 66, 1111–1119 (2022). https://doi.org/10.1007/s40194-021-01231-y