摘要
扩散磨损是42CrMo钢加工过程中刀具的主要磨损机理,因此抗扩散能力是评价硬质合金刀具涂层性能的主要技术指标之一。本文针对不同温度下的42CrMo钢与五种不同涂层之间的扩散性能进行了试验研究。采用扫描电子显微镜(SEM)和X射线能谱仪(EDS)观察并分析了主要元素的扩散情况,借助纳米压痕仪测试了扩散前与扩散后涂层表面的硬度值并进行了对比分析。研究结果表明,元素的扩散距离与温度呈正相关关系,Ti元素的扩散程度比Fe元素剧烈,TiN-TiCN-TiN-Al_2O_3-TiN涂层的扩散距离最小,硬度降低程度也较低,在所有涂层中表现出了最好的抗扩散能力。
The diffusion wear of cutting tools is the main wear mechanics in processing 42 CrMo steel. As a result,The diffusion resistance is one of the most important criteria to choose coating materials. In this paper,the element diffusion experiments were carried out between coating materials and 42 CrMo steel at different temperatures. X-ray energy dispersive microanalysis and a scanning electron microscope were used to analysis the diffusion distance of main elements. NanoTester Vantage was used to detect the decline of microhardness of coatings. The results showed that diffusion distance increases as the increase in temperature,the titanium（Ti） element diffused for a longer distance than iron（ Fe） element,and the TiNTiCN-TiN-Al_2 O_3-TiN coating material manifested the shortest diffusion distance and less decline of microhardness.
出处
《工具技术》
北大核心
2017年第10期18-23,共6页
Tool Engineering
基金
"高档数控机床与基础制造装备"科技重大专项(2015ZX040003-005)
