The effect of WC-Co substrates on TiN/TiCN/Al2O3/TiCNO multilayer coatings

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Surface Engineering Pub Date : 2023-06-03 DOI:10.1080/02670844.2023.2252660

Yingpu Huang, Lihui Zhu, Zhenyu Liu, Yuanyuan Bian

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Abstract

ABSTRACT In order to determine optimum substrate, TiN/TiCN/Al2O3/TiCNO coatings were deposited on WC-7Co substrate and WC-6Co substrate (named as Coating-7Co and Coating-6Co, respectively), and then the effect of WC-Co substrates on TiN/TiCN/Al2O3/TiCNO multilayer coatings was investigated by comparing the microstructure, hardness, adhesion strength, oxidation resistance and wear resistance of Coating-7Co and Coating-6Co. Results show that WC grain size of WC-6Co substrate is smaller, correspondingly the grain size of each layer in Coating-6Co is smaller, and the surface roughness is lower. Compared with Coating-7Co, Coating-6Co exhibits higher hardness, better plastic deformation capability, better oxidation resistance, lower friction coefficient and better short-period wear resistance. However, because of higher residual tensile stress and lower adhesion strength, the long-period wear resistance of Coating-6Co is worse than Coating-7Co conversely. To make good use of Coating-6Co, some post-deposition treatment techniques that can reduce residual tensile stress and improve adhesion strength should be considered.

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WC-Co基体对TiN/TiCN/Al2O3/TiCNO多层涂层的影响

为了确定最佳基体，分别在WC-7Co和WC-6Co基体上沉积TiN/TiCN/Al2O3/TiCNO涂层(分别命名为Coating-7Co和Coating-6Co)，通过对比镀层的显微组织、硬度、附着强度、抗氧化性和耐磨性，研究了WC-Co基体对TiN/TiCN/Al2O3/TiCNO多层镀层的影响。结果表明:WC- 6co基体WC晶粒尺寸较小，相应的，涂层- 6co中各层WC晶粒尺寸较小，表面粗糙度较低;与涂层- 7co相比，涂层- 6co具有更高的硬度、更好的塑性变形能力、更好的抗氧化性、更低的摩擦系数和更好的短周期耐磨性。然而，由于残余拉伸应力较高，结合强度较低，涂层- 6co的长周期耐磨性反而比涂层- 7co差。为了更好地利用镀层，应考虑采用一些能降低残余拉伸应力、提高附着强度的沉积后处理技术。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.