激光加工微织构对H13模具钢表面多层涂层性能的影响  

Effect of laser fabricated micro texture on properties of multilayer coating on H13 die steel surface

作　　者：姚南 胡树兵[1,2] 成永健 王爱华[1,2] YAO Nan;HU Shu-bing;CHENG Yong-jian;WANG Ai-hua(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China;School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《材料热处理学报》2022年第5期158-169,176,共13页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划课题(2020YFB2010304);国家自然科学基金重点项目(92066202)。

摘　　要：首先采用纳秒紫外激光器(355 nm)在H13钢(4Cr5MoSiV1)表面制备了不同密度及规则排布的微织构阵列,再采用高功率脉冲磁控溅射和电弧离子镀复合设备在织构化基体表面沉积了CrAlN/TiAlN/VN多层涂层。通过扫描电镜、超景深三维显微镜、维氏硬度计、纳米划痕仪、摩擦磨损试验机等分析了CrAlN/TiAlN/VN涂层的微观形貌和综合性能。结果表明:基体表面织构化可提高涂层的硬度,最大值达到1787 HV0.1,约为无织构基体涂层的1.06倍;微织构密度会影响H13钢基体与涂层的结合强度,与无织构相比,当织构面积占有率为20%时,基体与涂层的结合力提升了约17.3%,但织构密度过大则会降低结合力;基体表面织构化的CrAlN/TiAlN/VN涂层耐磨性能优异,其中10%织构密度的涂层试样的磨损量最低,仅为0.45 mg,耐磨性能最好。Firstly, the micro texture arrays with different density and regular arrangement were prepared on the surface of H13 steel(4 Cr5 MoSiV1) by nanosecond ultra-violet(UV) laser(355 nm), and then CrAlN/TiAlN/VN multilayer coatings were deposited on the surface of textured substrate by high-power impulse magnetron sputtering and arc ion plating. Micro morphology and comprehensive properties of the CrAlN/TiAlN/VN coatings were analyzed by means of scanning electron microscopy, super depth of field three-dimensional microscopy, Vickers hardness tester, nano scratch instrument and friction and wear test. The results show that the surface texture of the substrate can improve the hardness of the coatings, and the maximum value is 1787 HV0.1, which is about 1.06 times that of the non textured substrate coating. The micro texture density will affect the bonding strength between H13 steel substrate and coating. Compared with non texture, when the percentage of texture area is 20%, the bonding force between substrate and coating increases by about 17.3%, but too large texture density will reduce the bonding force. The CrAlN/TiAlN/VN coating with texture on the substrate surface has excellent wear resistance, and the coating sample with 10% texture density has the lowest wear amount, only 0.45 mg, the wear resistance is the best.

关 键 词：激光微织构 高功率脉冲磁控溅射 多层涂层 磨损性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]