纳米CeO2粉体增强Ni基激光熔覆合金涂层高温抗氧化性能的研究  

Study on High Temperature Oxidation Resistance of CeO2 Nano-meter Powder Reinforced Ni-Based Alloy Coating by Laser Cladding

作　　者：杨启正 汪新衡[2] 匡建新[2] 朱航生 

机构地区：[1]湖南科技经贸职业学院,湖南衡阳421001 [2]湖南工学院先进制造技术研究所,湖南衡阳421002 [3]衡阳丰顺车桥有限公司产品部,湖南衡阳421001

出　　处：《热加工工艺》2014年第14期127-130,共4页Hot Working Technology

基　　金：湖南省自然科学基金委员会与衡阳市人民政府自然科学联合基金资助项目（13JJ9025）

摘　　要：研究了通过添加适量纳米CeO2粉体,采用NiCoCrAlY合金粉末在GH4037合金表面激光熔覆制备了纳米CeO2粉体增强Ni基合金涂层,对熔覆层进行了显微组织分析,进行了1070℃下的高温抗氧化性试验。结果表明,添加适量纳米CeO2粉体对Ni基合金激光熔覆层组织具有明显细化作用,对界面区裂纹的产生有一定的抑制作用,熔覆层的高温抗氧化性能显著提高。CeO2nano-meter powder reinforced Ni-Based alloy coating was prepared by laser cladding on the surface of GH4037 alloy by adding amount of CeO2nano-meter powder and NiCoCrAlY alloy powder. Microstructure of layer cladding was analyzed, and high temperature oxidation resistance under 1070 ℃ was tested. The results show that microstructure of Ni-Based alloy laser cladding obviously is refined by adding appropriate amount of CeO2nano-meter powder. It can also inhibit crack formation of the interface region. High temperature oxidation resistance of the laser cladding is improved significantly.

关 键 词：激光熔覆 纳米CeO2粉体 NiCoCrAlY合金粉末 显微组织 高温抗氧化性 

分 类 号：TG156.99[金属学及工艺—热处理]