Welding material and welding method for high-manganese high-aluminum non-magnetic steel

By optimizing the composition of welding materials and welding methods, the microstructure compatibility and physical property matching of the austenitic weld seam of high-manganese and high-aluminum non-magnetic steel were ensured with the base metal. This solved the problems of poor welding quality and increased magnetic permeability of high-manganese and high-aluminum non-magnetic steel, and achieved high-quality welding.

CN122400892APending Publication Date: 2026-07-17HUNAN VALIN LIANYUAN IRON & STEEL CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN VALIN LIANYUAN IRON & STEEL CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the welding process of high-manganese and high-alumina non-magnetic steel, poor welding quality and increased magnetic permeability of the weld seam can lead to failure of the welded parts.

Method used

An optimized welding material composition and welding method are provided, including appropriate amounts of elements such as Mn, Ni, N, Al, and V, using non-consumable electrode inert gas shielded welding to ensure that the weld is a stable austenitic structure, reduce magnetic permeability, and reduce defects by optimizing groove design and welding parameters.

Benefits of technology

This achieves compatibility and physical property matching between the weld and the base material, reduces the magnetic permeability of the weld, avoids the burning loss of Mn and Al elements, improves welding quality and low-temperature toughness, and prevents equipment failure.

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Abstract

本申请公开了一种适用于高锰高铝无磁钢的焊接材料和焊接方法。该适用于高锰高铝无磁钢的焊接材料包括如下质量百分含量的组分：0.03%≤C≤0.05%，0.2%≤Si≤0.4%，25.5%≤Mn≤29.5%，4.5%≤Ni≤7.8%，0.28%≤N≤0.58%，P≤0.02%，S≤0.01%，0.03%≤Al≤0.10%，0.05%≤V≤0.12%，0.05≤Cr≤0.1%，0.1%≤Cu≤0.3%，余量为Fe和不可避免的杂质；焊接材料熔敷金属为奥氏体组织。采用本申请提供的焊接材料和焊接方法对高锰高铝无磁钢焊接时，焊缝质量好，且焊缝为奥氏体组织，焊缝的相对磁导率≤1.05。
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