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材料工程  2012 

激光熔覆原位生成Nb2(C,N)及V8C7陶瓷粒子增强铁基金属涂层

, PP. 29-33

Keywords: 激光熔敷,原位生成,耐磨性,抗氧化性

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Abstract:

采用5kWCO2激光设备,在42CrMo基体上制备出原位合成Nb2(C,N)及V8C7颗粒增强的铁基复合涂层,研究了熔覆层的组织及性能。结果表明激光熔覆层主要组成相为αFe相、γFe相、Nb2(C,N)及V8C7;增强相颗粒弥散分布在铁基复合涂层中,与母材相比,其磨损失重约为母材的1/8,显著提高了熔覆层的硬度和耐磨性。进一步的抗氧化性实验结果表明,氧化层结构连续致密,与42CrMo基体相比,在750℃/120h恒温氧化后的氧化层的厚度约为基体氧化层厚度的1/8。

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