Study on Microstructure and Mechanical Properties of 410S Ferritic Stainless Steel Welded Joint

YU Xiaofang; YU Daoyi; DU Huayun; SHU Xingwang; LIAO Lin

doi:10.7512/j.issn.1001-2303.2025.05.09

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Study on Microstructure and Mechanical Properties of 410S Ferritic Stainless Steel Welded Joint
Vol. 55, Issue 5, Pages: 69-76(2025)
Received：09 October 2024，

Revised：2024-12-25，

Published：20 May 2025
DOI： 10.7512/j.issn.1001-2303.2025.05.09
稿件说明：

移动端阅览

于小芳，于道祎，杜华云，等.410S铁素体不锈钢焊接接头组织及力学性能研究［J］.电焊机，2025，55（5）：69-76. DOI： 10.7512/j.issn.1001-2303.2025.05.09.

YU Xiaofang, YU Daoyi, DU Huayun, et al.Study on Microstructure and Mechanical Properties of 410S Ferritic Stainless Steel Welded Joint[J].Electric Welding Machine, 2025, 55(5): 69-76. DOI： 10.7512/j.issn.1001-2303.2025.05.09.

摘要

为了研究高频感应焊接技术在铁素体不锈钢焊接中的应用潜力，采用高频感应焊接技术对两种不同成分的410S铁素体不锈钢进行焊接试验。通过光学显微镜（OM）和扫描电子显微镜（SEM）对焊接接头的微观组织进行表征，并利用拉伸试验与冲击韧性试验对接头的力学性能进行综合评估。研究发现，高频焊焊接的410S铁素体不锈钢接头具有较窄的热影响区，晶粒长大不明显，且晶粒和组织在基体间呈垂直取向分布。两种不锈钢因Ni含量差异，导致焊接接头的力学性能存在显著差异：Ni含量较高的钢焊接接头展现出更优的抗拉强度和冲击韧性。然而，Si含量的降低致使焊缝出现空隙和氧化物杂质等缺陷。尽管如此，高频焊焊接接头的强度仍显著高于使用标准。研究结果表明，高频感应焊接技术有望成为铁素体不锈钢焊接的一种高效、可靠的工艺方法，为该类不锈钢在工业领域的更广泛应用提供了试验依据和技术参考。

Abstract

In this study

to explore the potential of high - frequency induction welding technology in welding ferritic stainless steel

we welded two types of 410S ferritic stainless steels with different compositions using this technology. The microstructure of the welded joints was characterized by OM and SEM

and their mechanical properties were evaluated by tensile and impact toughness tests.

Results

show that the welded joints of 410S ferritic stainless steel by high-frequency welding have a narrow heat-affected zone

no significant grain growth

and grains and microstructures distributed vertically between the matrix and the matrix due to external forces and heat input. The two stainless steels showed significant differences in the mechanical properties of the welded joints due to different Ni content

with the steel containing more Ni exhibiting better tensile strength and impact toughness. However

the decrease in Si content led to defects such as voids and oxide impurities in the weld. Nevertheless

the strength of the high-frequency welded joints was still significantly higher than the standard requirements. The study indicates that high-frequency induction welding technology has the potential to become an efficient and reliable welding method for ferritic stainless steel

offering experimental evidence and technical reference for the broader application of this type of stainless steel in the industrial field.

关键词

Keywords

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