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为了研究不锈钢渗铜层的纳米力学性能,本文采用等离子表面合金化技术在304不锈钢表面制备了渗铜层。利用纳米压入硬度仪,采用连续刚度测试法,对渗铜层以及不锈钢基体的表面和横截面的纳米力学性能进行了测试,得到了纳米压入过程的载荷-压入深度曲线,发现渗铜层抵抗外载荷的能力低于不锈钢基体。并得到了渗铜层和不锈钢基体的表面、横截面方向的硬度以及杨氏模量,经对比得到渗铜层的杨氏模量和硬度都要比不锈钢基体的低,并且渗铜层的力学性能表现出各向异性。对纳米压入的数据进行分析,发现渗铜层在小尺度压入时硬度和杨氏模量表现出明显的“尺度效应”。
In order to study the mechanical properties of stainless steel infiltration of copper nano-mechanical properties, this paper uses plasma surface alloying technology in the 304 stainless steel surface prepared copper infiltration layer. The nano-mechanical properties of surface layer and cross-section of copper-infiltrated layer and stainless steel substrate were tested by nanoindentation hardness tester and continuous stiffness test method. The load-pressure depth curve of nano- Layer resistance to external load than the stainless steel substrate. The surface hardness and Young’s modulus of the copper-infiltrated layer and the stainless steel substrate were obtained, and the Young’s modulus and hardness of the copper-infiltrated layer were lower than that of the stainless steel substrate, and the mechanics of the copper-infiltrated layer Performance anisotropy. According to the data of nanoindentation, it is found that the hardness and Young’s modulus of copper infiltration layer show obvious “scale effect” when it is pressed in small scale.