摘要
以ＮｉＣｒ－ＣｒＣ２混合粉末为原料，对γＴｉＡｌ金属间化合物合金进行激光表面合金化，制得了以γ－ＮｉＣｒＡｌ镍基固溶体为基体、以ＴｉＣ及Ｃｒ７Ｃ３为增强相的复合材料表面改性层，分析了激光表面合金化改性层的组织，并测试了其在滑动磨损试验条件下的耐磨及高温抗氧化性能。试验结果表明，上述激光表面合金化层具有很高的硬度、较高的耐磨性及高温抗氧化性。
'In-situ' γ-NiCrAl/TiC/Cr7C3 composite coatings were fabricated on substrate of γ-TiAl intermetallic alloy with NiCr-Cr3C2 alloy powder pre-coatings using laser surface alloying. The effect of constitution of the pre-coating alloy powders on microstructure of the composite coatings was investigated using OM, SEM, XRD and EDS. Wear resistance of the laser treated samples was evaluated under dry sliding wear conditions, and the oxidation resistance was tested at 1 000°C in resistance furnace. The laser surface alloyed γ-NiCrAl/TiC/Cr7C3 composite coatings on γ-TiAl intermetallic alloy have high hardness, good wear and high-temperature oxidation resistances.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期224-227,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(59671050)
