Fitriyana Deni Fajar, Puspitasari Windy Desti, Palanisamy Sivasubramanian, Muhadzdzib Mufti, Anis Samsudin, Siregar Januar Parlaungan, Cionita Tezara, Alagarsamy Aravindhan, S Sarath K, Al-Farraj Saleh A, Almansour Mansour I, Ma Quanjin
Department of Mechanical Engineering, Universitas Negeri Semarang, Semarang, 50229, Indonesia.
Department of Mechanical Engineering, P T R College of Engineering & Technology, Thanapandiyan Nagar, Austinpatti, Madurai-Tirumangalam Road, Madurai, 625008, Tamilnadu, India.
Sci Rep. 2025 Jul 9;15(1):24610. doi: 10.1038/s41598-025-10713-8.
The purpose of this study is to evaluate the effects of substrate surface roughness (35 μm and 40 μm) and preheat temperature (50 °C, 100 °C, 150 °C) on the properties of the FeCrBMnSi coating layer applied to 304 stainless steels using the TWAS (Twin Wire Arc Spray) method. Surface preparation involved sandblasting and preheat treatment, followed by coating application with TWAS, and subsequent characterization using pull-off bonding, hardness, corrosion rate, Light Optical Microscope (LOM), and scanning electron microscopy (SEM) test. The current study's findings indicate that increasing preheat temperature and surface roughness consistently reduces the percentage of porosity, unmelted material, and coating layer thickness. This enhances the hardness and adhesive strength of the coating layers. The hardness of the coating layer obtained in the present study was improved by 360-439% compared to the uncoated material. The best specimen in this study was found on a substrate with a surface roughness of 40 μm and performed a preheating treatment at a temperature of 150 °C. The thickness of the coating layer for this specimen was 150.58 × 10⁻³ mm, with a porosity and unmelted materials of 7.233%, a hardness of 1114.6 HV, an adhesive strength of 20.29 MPa, and a corrosion rate of 1.0640 × 10⁻² mmpy. However, the corrosion resistance of the coated specimens remains lower than that of the uncoated 304 stainless steel.
本研究的目的是评估基体表面粗糙度（35μm和40μm）以及预热温度（50°C、100°C、150°C）对采用双丝电弧喷涂（TWAS）法涂覆在304不锈钢上的FeCrBMnSi涂层性能的影响。表面处理包括喷砂和预热处理，随后用TWAS进行涂层涂覆，并通过拉拔粘结、硬度、腐蚀速率、光学显微镜（LOM）和扫描电子显微镜（SEM）测试进行后续表征。当前研究结果表明，提高预热温度和表面粗糙度会持续降低孔隙率、未熔材料的百分比以及涂层厚度。这提高了涂层的硬度和粘结强度。与未涂层材料相比，本研究中获得的涂层硬度提高了360 - 439%。本研究中最佳试样是在表面粗糙度为40μm的基体上，并在150°C的温度下进行预热处理。该试样的涂层厚度为150.58×10⁻³mm，孔隙率和未熔材料为7.233%，硬度为1114.6 HV，粘结强度为20.29 MPa，腐蚀速率为1.0640×10⁻² mmpy。然而，涂层试样的耐腐蚀性仍低于未涂层的304不锈钢。
