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Microstructure and Properties of 2Cr13-xMo Stainless Steels Fabricated by Direct Laser Deposition
Jing Liang,Ziyang Lin,Xiuyuan Yin,Suiyuan Chen,Changsheng Liu,Ruihong Chai,Hongwei Zhang,Guangquan Tang,Kun Tian 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1
In this paper, 2Cr13 stainless steels with diferent Mo contents (x=0 wt%, 0.5 wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%) were fabricated by Direct Laser Deposition (DLD) technology. The efects of Mo element on the microstructure evolution and comprehensive properties such as corrosion resistance and wear resistance of 2Cr13 stainless steel were investigated in detail. The results showed that the microstructure for the DLD 2Cr13 stainless steel was mainly composed of martensite, ferrite,and a small amount of Mo2C and Cr23C6 carbides. With the content of Mo increased from 0.5 to 1.5 wt%, the martensiticmicrostructure was refned and more dispersed Mo2C and Cr23C6 carbides were formed. The average microhardness andcorrosion resistance of the DLD 2Cr13-xMo were increased with the Mo content increased from 0 to 1.0 wt%, and thendecreased when the Mo content exceeded 1.0 wt%. For the DLD 2Cr13-1.0 wt% Mo, the average microhardness reachedup to 620 HV0.2, and the highest corrosion resistance (self-corrosion potential − 0.34 V) was obtained, in which the selfcorrosion potential was 0.05 higher than that of DLD 2Cr13 stainless steel. The wear resistance of the DLD 2Cr13-xMogradually increased with the increase of the Mo, the wear mass loss of DLD 2Cr13-xMo (x=1.0 wt%) was only 37% thatof DLD 2Cr13 stainless steel.