Analysis of microstructural, corrosion, and wear properties of austenite SS304 joints welded by underwater wet automated metal arc welding

IF 2.2 3区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Pub Date : 2025-01-09 DOI:10.1177/13506501241305670

Mohd Ashraf Hajam, Dinesh Kumar Rajendran

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引用次数: 3

Abstract

This study explores the feasibility of using underwater wet automated metal arc welding. A specially designed welding setup was used, providing precise control over the x, y, and z axes to weld the high strength Austenite AISI304 stainless steel in present study. The welding process operated at 145 Amps of current, a voltage of 23 V, a feed rate of 2.5 mm/sec, and utilized a 3.15 mm × 350 mm flux-coated SS304 electrode, ensuring sufficient arc generation for effective welding. Microstructural analysis was conducted using optical microscopy and FESEM, while corrosion performance was evaluated through potentiodynamic tests, and wear characterization was performed using an engine tribometer. The weld zone exhibited a refined, columnar grain structure, which improved corrosion resistance, with a corrosion rate (CR) of 0.01052 mmpy, as determined by Tafel testing. Additionally, wear resistance tests revealed that the weld specimen outperformed the base metal, with a wear rate of 2.352 g/Nm × 10 −10 compared to the base metal's 3.201 g/Nm × 10 −10 . The results emphasize the potential of underwater wet automated metal arc welding in enhancing the structural integrity of marine constructions through improved corrosion and wear performance.

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水下湿式自动金属电弧焊焊接奥氏体SS304接头的组织、腐蚀和磨损性能分析

本研究探讨水下湿式自动金属电弧焊的可行性。采用特殊设计的焊接装置，对高强度奥氏体AISI304不锈钢的x、y、z轴进行精确控制。焊接过程在145安培的电流、23 V的电压、2.5 mm/秒的进给速率下进行，并使用3.15 mm × 350 mm的涂药SS304电极，确保产生足够的电弧以实现有效的焊接。使用光学显微镜和FESEM进行了显微组织分析，通过动电位测试评估了腐蚀性能，并使用发动机摩擦计进行了磨损表征。通过Tafel试验，焊缝区呈现出细化的柱状晶粒组织，提高了耐蚀性，腐蚀速率（CR）为0.01052 mmpy。此外，耐磨性测试表明，焊缝试样的磨损率为2.352 g/Nm × 10−10，而母材的磨损率为3.201 g/Nm × 10−10。研究结果强调了水下湿式自动金属电弧焊通过改善腐蚀和磨损性能来增强海洋结构完整性的潜力。

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

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 工程技术-工程：机械

CiteScore

4.20

自引率

5.00%

发文量

110

审稿时长

6.1 months

期刊介绍： The Journal of Engineering Tribology publishes high-quality, peer-reviewed papers from academia and industry worldwide on the engineering science associated with tribology and its applications. "I am proud to say that I have been part of the tribology research community for almost 20 years. That community has always seemed to me to be highly active, progressive, and closely knit. The conferences are well attended and are characterised by a warmth and friendliness that transcends national boundaries. I see Part J as being an important part of that community, giving us an outlet to publish and promote our scholarly activities. I very much look forward to my term of office as editor of your Journal. I hope you will continue to submit papers, help out with reviewing, and most importantly to read and talk about the work you will find there." Professor Rob Dwyer-Joyce, Sheffield University, UK This journal is a member of the Committee on Publication Ethics (COPE).