Microstructure and properties of particle-reinforced Inconel 625 coatings by wire-powder synergistic high-speed laser cladding
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稿件编号:85 访问权限:仅限参会人
更新:2024-10-14 10:59:22
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摘要
Two different particle-reinforced Inconel 625 coatings were prepared via wire-powder synergistic high-speed laser cladding. In this process, Inconel 625 was employed as the feeding wire, while B4C and Cr3C2 particles served as the feeding powders. The phase composition and microstructure of the two coatings were analyzed, and the microhardness, wear resistance and corrosion resistance of the two coatings were evaluated. The results indicate that the main phase in both coatings is γ-Ni. The microstructure of both coatings is fine and dense, with segregation of Nb, Cr, Mo and C elements at the grain boundaries, which indicated precipitation of the Laves phase. Moreover, unmelted Cr3C2 particles were observed in the middle of the Inconel 625+Cr3C2 coating. And the microhardness distribution of both coatings is uniform, with the Inconel 625+B4C coating exhibiting a higher microhardness than the Inconel 625+Cr3C2 coating. The coefficient of friction of the Inconel 625+Cr3C2 coating is slightly lower than the Inconel 625+B4C coating. However, the wear loss and wear volume of the Inconel 625+ Cr3C2 coating are higher than the Inconel 625+B4C coating. Both coatings showed passivation during the electrochemical test, the Inconel 625+Cr3C2 coating showed a lower self-corrosion current density, indicating superior corrosion resistance. In conclusion, the Inconel 625+B4C coating showed better wear resistance than the Inconel 625+Cr3C2 coating, which showed better corrosion resistance.
关键字
high-speed laser cladding,wire-powder synergistic,Inconel 625,carbide particles,wear resistance,corrosion resistance
稿件作者
晨昕 贾
中国石油大学(华东)
李 美艳
中国石油大学(华东)
成明 苏
陕西天元智能再制造股份有限公司
彬 韩
中国石油大学(华东)
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