Layered 50Cr6Ni2/Stellite X-40 Multi-material Fabricated by Direct Laser Deposition: Characterization and Properties

Fretting damage under high temperature corrosion and wear condition is one of the main factors that cause the failure of the key parts of mechanical and electrical equipment, and laser cladding wear-resistant and corrosion-resistant coating is the main technology to repair these failure key parts. In this paper, the layered 50Cr(6)Ni(2)/Stellite X-40 multi-material was prepared by direct laser deposition (DLD) using wear-resistant Fe-based alloy and corrosion-resistant Co-based alloy, to meet the needs of repair and remanufacturing of key parts with fretting damage. The results show that the layered 50Cr(6)Ni(2)/Stellite X-40 composite material retains their respective microstructures and excellent properties. The microstructure of the 50Cr(6)Ni(2) layer mainly contains martensite and granular bainite, the microstructure of the Stellite X-40 layer consists of dendrite and eutectic structure. The layered 50Cr(6)Ni(2)/Stellite X-40 composite material has both good wear resistance (wear mass loss is 1.0 mg) and good corrosion resistance (- 0.37549 of E-corr and 0.00032 of i(corr)). The DLD layered 50Cr(6)Ni(2)/Stellite X-40 composite material could meet the demand of short stress path rolling mill remanufacturing.

Automated summary

The paper introduces a layered 50Cr(6)Ni(2)/Stellite X-40 composite material prepared using laser cladding technology for repairing fretting damage on key parts. The composite material exhibits good wear resistance and corrosion resistance, meeting the needs of remanufacturing short stress path rolling mills.