Preparation and properties of CrN coatings on H13 steel via laser shock pretreatment

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-09-22 DOI:10.1016/j.surfcoat.2025.132721

Junming Luo, Jiancheng Wen, Shiyu Cui

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Abstract

CrN coatings were prepared on H13 steel using a combined process of laser shock peening (LSP) pretreatment and double-glow plasma surface alloying (DGPSA). This study investigated the effect of LSP on the microstructure, mechanical properties, and interfacial bonding of the coatings. LSP pretreatment significantly enhanced the surface hardness and induced residual compressive stress in the substrate by forming a nanocrystalline structure and high-density dislocations, providing favorable conditions for CrN deposition. The CrN coating on the LSP-pretreated sample (particularly 4LSP + CrN) exhibited a uniform, dense microstructure and a tightly bonded interface with the substrate, free from defects. Compared to the coating on the untreated substrate (SUB + CrN), the 4LSP + CrN coating showed increases of approximately 45.56 % in thickness, 37 % in adhesion strength, and 36.03 % in microhardness. Its wear resistance was markedly improved, with reductions of 11.1 % in friction coefficient, 12.9 % in wear scar width, 13.0 % in wear volume, and 12.8 % in wear rate. The SUB + CrN sample experienced fatigue wear, abrasive wear, and oxidative wear, while the LSP + CrN sample primarily exhibited mild abrasive wear and adhesive wear.

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激光冲击预处理H13钢表面CrN涂层的制备及性能研究

采用激光冲击强化（LSP）预处理和双辉光等离子体表面合金化（DGPSA）相结合的工艺在H13钢表面制备了CrN涂层。研究了LSP对涂层微观结构、力学性能和界面结合的影响。LSP预处理通过形成纳米晶结构和高密度位错，显著提高了基体的表面硬度，并在基体中诱导残余压应力，为CrN的沉积提供了有利条件。经过lsp预处理的CrN涂层（特别是4LSP + CrN）表现出均匀致密的微观结构，与基体结合紧密，无缺陷。与未处理的基体（SUB + CrN）涂层相比，4LSP + CrN涂层的厚度增加了45.56%，附着强度增加了37%，显微硬度提高了36.03%。其耐磨性显著提高，摩擦系数减小11.1%，磨损痕宽度减小12.9%，磨损体积减小13.0%，磨损率减小12.8%。SUB + CrN试样主要表现为疲劳磨损、磨粒磨损和氧化磨损，而LSP + CrN试样主要表现为轻度磨粒磨损和粘着磨损。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.