南京航空航天大学学报（英文版）2025，Vol.42Issue(6)：830-840,11.DOI:10.16356/j.1005-1120.2025.06.009
氮碳共渗300M钢表面TiAlN涂层界面结合增强机制研究
Investigation on Interfacial Adhesion Enhancement Mechanisms of TiAlN Coatings on Nitrocarburized 300M Steel
摘要
Abstract
This study investigates the interfacial adhesion enhancement mechanisms of TiAlN coatings deposited on nitrocarburized 300M ultra-high-strength steel substrates.Through radio frequency(RF)magnetron sputtering technology,TiAlN coatings(approximately 4 μm thick)are fabricated on both pristine and plasma-nitrocarburized(PNC)substrates.Comparative analyses of phase composition,microstructure,and mechanical properties are conducted using field emission scanning electron microscope(FESEM),X-ray diffraction(XRD),nanoindentation,and scratch testing.Molecular dynamics(MD)simulations with Materials Studio(MS)software elucidate atomic-scale interactions between TiAlN coatings and substrates.Results demonstrate that the PNC pretreatment generates a dual-phase structure(about 65 μm thick)comprising the γ-Fe4N compound layer and a high-hardness diffusion layer,establishing a continuous hardness gradient at the coating-substrate interface.The PNC/TiAlN composite coating exhibits enhanced interfacial adhesion strength,attributed to mechanical interlocking from plasma-etched microvoids and optimized lattice matching.Scratch tests reveal a significant increase in critical load to 60 N for coating delamination in PNC/TiAlN systems compared with monolayer coatings.These improvements mitigate brittle spallation risks while maintaining superior hardness(29.26 GPa)and wear resistance.This paper provides atomic-level insights into adhesion enhancement mechanisms and proposes a viable duplex surface engineering strategy for high-strength steel components.关键词
300M钢/TiAlN涂层/氮碳共渗/界面结合强度Key words
300M steel/TiAlN coatings/nitrocarburized/interfacial adhesion strength分类
信息技术与安全科学引用本文复制引用
左士伟,梁文萍,缪强,吴红艳,范哲航,郭焕银..氮碳共渗300M钢表面TiAlN涂层界面结合增强机制研究[J].南京航空航天大学学报（英文版）,2025,42(6):830-840,11.基金项目
This work was supported by the Na-tional Major Science and Technology Projects of China(No.Y2022-Ⅲ-0004-0013),the National Natural Science Foun-dation of China(No.52272065),the Sicence and Technol-ogy Plan Project of Suzhou City(N0.SZKXM202301),the Technical Service Project of Suzhou University(No.2024xhx 140),the Suzhou University Doctoral Research Foundation(No.2023BSK013),and the Natural Science Research Project in the Universities of Anhui Province(No.2023AH053390). （No.Y2022-Ⅲ-0004-0013）
