Laser-cladding remanufacturing of Rockit® 401 coating on the surface of 1Cr17Ni2 stainless steel

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-06-09 DOI:10.1016/j.optlastec.2025.113306

Zansong Li , Fei Ding , Kai Zhou , Yang Liu , Dongsheng Wang , Shuang Liu , Deqiao Xie , Xuesong Gao , Youwen Yang , Lida Shen

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Abstract

In this study, a Rockit® 401 coating was deposited on the surface of 1Cr17Ni2 stainless steel using the laser-cladding method to enhance its comprehensive performance, and its microstructure and mechanical properties were comprehensively investigated. The results showed that the coating mainly comprised martensite, retained austenite, and eutectic phases (ferrite, Cr₂B, and (Cr,Fe)₂₃C₆). Additionally, substructures, such as high-density dislocations, stacking faults, and twins, were observed in the coating. The combined effects of solid solution, second-phase, substructure, and fine-grain strengthening significantly improved the mechanical properties of the coating. Notably, the average microhardness of the coating was approximately 1.26 times that of the substrate. The wear rate and wear volume (1.32 × 10^-7 mm³N^-1mm⁻¹ and 0.816 mm³, respectively) were significantly lower than those of the substrate (4.51 × 10^-7 mm³N^-1mm⁻¹ and 2.79 mm³). Characterization of the worn surface revealed that the coating involved three wear mechanisms: adhesive wear, abrasive wear, and oxidative wear. Furthermore, the laser-clad remanufactured specimens exhibited satisfactory tensile properties. The average tensile strength of specimens prepared using two laser-cladding strategies (

x

and

y

directions) were 100.4 % and 99.4 % of the substrate, respectively. Fracture analysis revealed that the coating mainly underwent intergranular brittle fracture, while the substrate mainly exhibited micro-void coalescence fracture.

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激光熔覆1Cr17Ni2不锈钢表面Rockit®401涂层的再制造

为了提高1Cr17Ni2不锈钢的综合性能，采用激光熔覆的方法在其表面沉积了一层Rockit®401涂层，并对其微观组织和力学性能进行了全面的研究。结果表明：涂层主要由马氏体、残余奥氏体和共晶相（铁素体、Cr2B和（Cr,Fe）23C6）组成；此外，在涂层中还观察到高密度位错、层错和孪晶等亚结构。固溶、第二相、亚组织和细晶强化的共同作用显著提高了涂层的力学性能。值得注意的是，涂层的平均显微硬度约为基体的1.26倍。磨损率和磨损体积（分别为1.32 × 10-7 mm3N-1mm−1和0.816 mm3）显著低于衬底（4.51 × 10-7 mm3N-1mm−1和2.79 mm3）。对磨损表面的表征表明，涂层的磨损机制有三种：粘附磨损、磨粒磨损和氧化磨损。此外，激光熔覆再制造试样具有良好的拉伸性能。采用两种激光熔覆策略（x和y方向）制备的试样的平均抗拉强度分别为基体的100.4%和99.4%。断口分析表明，涂层主要发生晶间脆性断裂，基体主要发生微孔洞贯通断裂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems