Cold metal transfer welding of 316L/430 dissimilar stainless-steel welds

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2023-12-19 DOI:10.1108/acmm-03-2023-2774

Chetan Tembhurkar, Sachin Ambade, Ravinder Kataria, Jagesvar Verma, Abhijeet Moon

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Abstract

Purpose

This paper aims to examine dissimilar joints for various applications in chemical, petrochemical, oil, gas, shipbuilding, defense, rail and nuclear industry.

Design/methodology/approach

This study examined the effects of cold metal transfer welding on stainless steel welds for 316L austenitic and 430 ferritic dissimilar welds with ER316L, ER309L and without (autogenous) fillers. The microstructural observation was done with an optical microscope. The mechanical test was done to reveal the strength, hardness and toughness of the joint. The electrochemical polarization tests were done to reveal intergranular and pitting corrosion in the dissimilar joints.

Findings

This microstructural study shows the presence of austenitic and ferritic phases with vermicular ferrite for ER309L filler weld, and for ER316L filler weld specimen shows predominately martensitic phase in the weld region, whereas the autogenous weld shows lathy ferrite mixed with martensitic phase. Mechanical test results indicated that filler welded specimen (ER316L and ER309L) has relatively higher strength and hardness than the autogenous weld, whereas ER316L filler weld exhibited the highest impact toughness than ER309L filler weld and lowest in autogenous weld. The electrochemical corrosion results displayed the highest degree of sensitization (DOS) in without filler welded specimen (45.62%) and lower in case of filler welded specimen ER309L (4.95%) and least in case of ER316L filler welded specimen (3.51%). The high DOS in non-filler welded specimen is correlated with the chromium carbide formation. The non-filler welded specimen shows the highest pitting corrosion attack as compared to the ER316L filler weld specimen and relatively better in ER309L filler welded specimen. The highest pitting corrosion resistance is related with the high chromium content in ER309L composition.

Originality/value

This experimental study is original and conducted with 316L and 430 stainless steel with ER316L, ER309 and without fillers, which will help the oil, shipbuilding and chemical industries.

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316L/430 异种不锈钢焊缝的冷金属转移焊接

本文旨在研究异种接头在化工、石化、石油、天然气、造船、国防、铁路和核工业中的各种应用。本研究考察了冷金属转移焊接对不锈钢焊缝的影响，包括带有 ER316L、ER309L 和不带（自生）填料的 316L 奥氏体和 430 铁素体异种焊缝。用光学显微镜观察了微观结构。机械测试用于检测接头的强度、硬度和韧性。研究结果这项微观结构研究表明，ER309L 填充焊缝存在奥氏体和铁素体相，并伴有蛭石状铁素体；ER316L 填充焊缝试样在焊接区域主要显示出马氏体相，而自生焊缝则显示出与马氏体相混合的蛭石状铁素体。机械测试结果表明，填充焊缝试样（ER316L 和 ER309L）的强度和硬度相对高于自生焊缝，而 ER316L 填充焊缝的冲击韧性比 ER309L 填充焊缝最高，自生焊缝最低。电化学腐蚀结果显示，无填充焊缝试样的敏化程度（DOS）最高（45.62%），填充焊缝试样 ER309L 的敏化程度较低（4.95%），填充焊缝试样 ER316L 的敏化程度最低（3.51%）。无填充物焊接试样的高 DOS 与碳化铬的形成有关。与 ER316L 填充焊试样相比，非填充焊试样的点蚀侵蚀最高，而 ER309L 填充焊试样的点蚀侵蚀相对较好。最高的抗点蚀性能与 ER309L 成分中的高铬含量有关。原创性/价值这项实验研究是原创性的，使用 ER316L、ER309 和无填料的 316L 和 430 不锈钢进行，这将有助于石油、造船和化工行业。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.