不同法向载荷下TiN涂层磨损寿命与失效机理研究

采用阴极弧等离子沉积技术在高速钢(HSS)和硬质合金钢(WC-Co)基体上制备TiN涂层，利用往复摩擦磨损试验机、轮廓仪、扫描电子显微镜和能谱仪等分析了不同法向载荷下TiN涂层的摩擦磨损特性和失效过程，建立了涂层磨损寿命图. 研究结果表明：TiN涂层/HSS试样摩擦系数随循环次数增加呈上升趋势；TiN涂层/WC-Co试样在30 N法向载荷下的摩擦系数随循环次数呈上升趋势，在60~120 N法向载荷下摩擦系数波动较大. 涂层试样的磨损深度随法向载荷与循环次数的增加而增加. TiN涂层/HSS试样在30 N法向载荷的主要失效形式是磨粒磨损、轻微黏着磨损和氧化磨损，在60~120 N法向载荷的主要失效形式是涂层断裂、磨粒磨损和剥层磨损. TiN涂层/WC-Co试样在30~50 N法向载荷下的主要失效形式是磨粒磨损，在60~120 N法向载荷下的主要失效形式是严重剥层. TiN涂层的磨损寿命图可以分为两部分：涂层工作区和涂层失效区. 接触应力越大，涂层磨损寿命越短. 基体材料抵抗变形的能力越强，涂层磨损寿命越长. TiN涂层/HSS基体具有良好的抵抗法向载荷的能力和较长的磨损寿命.TiN coatings were deposited on high-speed steel (HSS) and cemented carbide (WC-Co) substrates via cathodic arc plasma deposition technique. The friction and wear behaviors and failure processes of TiN coatings under different normal loads were analyzed using reciprocating friction and wear testing machines, profilometers, scanning electron microscopes, energy dispersive spectrometers and other characterization tools, and the coating wear life maps were established. The research results show that: The friction coefficient of TiN coating/HSS specimens shows an upward trend with increasing cycle times; The friction coefficient of TiN coating/WC-Co specimens increases with cycle times under a normal load of 30 N, while it fluctuates greatly under normal loads of 60–120 N. The wear depth of coated specimens increases with the increase of normal load and cycle times. The main failure modes of TiN coating/HSS specimens under 30 N normal load are abrasive wear, mild adhesive wear and oxidative wear; under 60–120 N normal load, the main failure modes are coating fracture, abrasive wear and delamination wear. The main failure modes of TiN coating/WC-Co specimens under 30–50 N normal load are abrasive wear, while under 60–120 N normal load, the main failure mode is severe delamination. The wear life map of TiN coatings can be divided into two parts: coating working zone and coating failure zone. The higher the contact stress, the shorter the wear life of the coating. The stronger the deformation resistance of the substrate material, the longer the wear life of the coating. The TiN coating/HSS substrate exhibits excellent resistance to normal loads and a long wear life.

搜集汇总

背景与挑战

背景概述

该数据集研究了TiN涂层在不同法向载荷下的磨损寿命与失效机理，通过实验分析了涂层在高速钢和硬质合金钢基体上的摩擦磨损特性、失效形式（如磨粒磨损、剥层磨损等），并建立了磨损寿命图，揭示了接触应力和基体材料对涂层寿命的影响。