Structure and Properties of Welded Joints of High-Strength Steels Made by Metal-Cored Wire with Nitrogen

被引：0
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作者：
A. S. Smolentsev
V. E. Veselova
A. V. Berezovsky
E. A. Usoltsev
A. V. Shak
机构：
[1] Ural Federal University named after first President of Russia B. N. Yeltsin,Institute of Engineering Science
[2] UB RAS,undefined
来源：
Metallurgist | 2024年 / 67卷
关键词：
arc welding; high-strength steels; hull structures; special equipment; metal-cored wire; nitrogen; austenite;
D O I：
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学科分类号：
摘要：
An austenitic metal-cored wire (diameter – 1.6 mm) with additional nitrogen alloying (0.25–0.40 wt.%) was developed for this study. Mechanical tests and metallographic studies of the deposited metal and welded joints made with austenitic metal-cored wire (composition – Cr20Mn5Ni4Mo2.5Cu3N0.3) were conducted. It was found that the values of σu and σ0.2 of the deposited metal obtained by using the developed wire were 20 to 30% higher compared to the utilized electrode materials, while the ductility characteristics were preserved (δ = 43%). It was shown that the use of metal-cored wire (Cr20Mn5Ni4Mo2.5Cu3N0.3) for welding of high-strength steel 20HGSNM (EN 1.6523) makes it possible to obtain defect-free welded joints with austenitic-ferritic structure, which have 20% higher strength characteristics compared to the analogues.
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页码：1334 / 1343
页数：9
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