摘要
采用激光选区熔化(SLM)技术制备钴基合金和Cr_(3)C_(2)/钴基合金,对比研究两种合金的高温抗氧化性能,总结添加Cr_(3)C_(2)颗粒对钴基合金高温抗氧化的影响机制。结果表明:在950℃氧化40 h,Cr_(3)C_(2)/钴基合金单位面积氧化增量仅为0.986 mg/cm^(2),相比于钴基合金提升了85%。Cr_(3)C_(2)/钴基合金表面存在片状的Cr_(2)O_(3)氧化膜,CoCr_(2)O_(4)含量显著减少。添加Cr_(3)C_(2)使合金中Cr含量增加,合金表面形成连续的氧化膜,阻碍氧气向内扩散,提升合金的抗氧化性能。
Cobalt-based alloy and Cr_(3)C_(2)/cobalt-based alloy were prepared by selective laser melting(SLM)for a comparative study of their high-temperature oxidation resistance,aiming to investigate the effect of Cr_(3)C_(2)particles on the oxidation resistance of the cobalt-based alloy.The results show that the oxidation mass gain per unit area of the Cr_(3)C_(2)/Cobalt-based alloy was only 0.986 mg/cm^(2)after oxidation at 950℃for 40 h,representing an 85%reduction compared to the Cobalt-based alloy.A platelet-like Cr_(2)O_(3)oxide film was formed on the surface of the Cr_(3)C_(2)/cobalt-based alloy,and the CoCr_(2)O_(4)content on the surface was significantly reduced.The addition of Cr_(3)C_(2)increased the Cr content in the alloy,promoting the formation of a continuous oxide film on the surface.This film effectively hindered the inward diffusion of oxygen,thereby enhancing the oxidation resistance of the alloy.
作者
雷进
王思维
杨帆
黄志华
朱华敏
张弛
李林
Lei Jin;Wang Siwei;Yang Fan;Huang Zhihua;Zhu Huamin;Zhang Chi;Li Lin(Zhuzhou National Innovation Railway Technology Co.,Ltd.,Zhuzhou 412000,Hunan,China)
出处
《应用激光》
北大核心
2025年第7期60-65,共6页
Applied Laser
