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A high-strength, high-toughness, high-nitrogen austenitic stainless steel welding wire and preparation method thereof

A high-toughness, high-nitrogen austenite and high-nitrogen austenite technology, applied in the field of welding materials and processing technology, can solve the problems of reducing strength and toughness, and achieve excellent impact toughness, less pore defects, and less escape. Effect

Active Publication Date: 2020-12-08
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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Problems solved by technology

[0004] The first technical problem to be solved by the present invention is to provide a high-strength, high-toughness high-nitrogen austenitic stainless steel welding wire to solve the problem of reducing the strength and toughness of the existing high-nitrogen austenitic stainless steel weld metal due to nitrogen loss and nitrogen pore defects. question
[0005] The second technical problem to be solved by the present invention is to provide a method for preparing high-strength, high-toughness, high-nitrogen austenitic stainless steel welding wire. Hole defects reduce strength and toughness issues

Method used

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Embodiment Construction

[0017] Below in conjunction with embodiment the present invention is described in further detail.

[0018] A high-strength, high-toughness, high-nitrogen austenitic stainless steel welding wire. The alloy composition of the welding wire is: C<0.1%, S<0.02%, P<0.03%, Si: 0.1-0.9%, Mn: 5-21 %, Cr: 15-23%, Ni: 0-8%, Mo: 0-5%, N: 0.2-0.95%, Fe is the balance, other impurities <0.1%; the size of the welding wire is Φ1.1~1.3 mm.

[0019] A method for preparing a high-strength, high-toughness, high-nitrogen austenitic stainless steel welding wire. The welding wire preparation process is: induction furnace smelting plus electroslag remelting → hot forging → hot rolling → heat treatment → welding wire drawing;

[0020] Specifically: according to the alloy composition ratio of the welding wire, the ingredients are mixed, induction furnace smelting and electroslag remelting are carried out, and the ingot of high nitrogen austenitic stainless steel welding wire alloy is subjected to conv...

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Abstract

The invention relates to a high-strength high-toughness high-nitrogen austenitic stainless steel welding wire and a preparation method thereof. The welding wire is prepared from the alloy components in percentage by weight: less than 0.1 percent of C, less than 0.02 percent of S, less than 0.03 percent of P, 0.1 to 0.9 percent of Si, 5 to 21 percent of Mn, 15 to 23 percent of Cr, 0 to 8 percent ofNi, 0 to 5 percent of Mo, 0.2 to 0.95 percent of N, the balance Fe, and less than 0.1 percent of other impurities. The preparation process comprises the steps of smelting through an induction furnace, electro slags remelting, hot forging, hot rolling, heat treating, and drawing of the welding wire. According to the welding wire provided by the invention, the component proportion is scientific andreasonable, the content of nitrogen elements is increased, the content of manganese elements is adjusted, and the solid solubility of the nitrogen is increased, so that the prepared welding wire is stable in welding process, less in escape amount of hydrogen elements, less in blowhole defects, good in welding processability, high in deposited metal strength, excellent in impact toughness at the temperature of minus 40 DEG C, suitable for welding high-nitrogen austenitic stainless steel, particularly suitable for welding the austenitic stainless steel with the requirement on low-temperature impact toughness, and capable of being surfacing-welded so as to be used as anti-corrosion layers for other steel and iron materials.

Description

technical field [0001] The invention belongs to the technical field of welding materials and processing technology, and relates to a high-strength, high-toughness, high-nitrogen austenitic stainless steel welding wire and a preparation method thereof, in particular to a high-nitrogen austenitic stainless steel specially used for welding high-nitrogen austenitic stainless steel Welding wire and its preparation process. Background technique [0002] High-nitrogen austenitic stainless steel uses N element instead of expensive alloy element Ni as austenite stabilizing element to obtain austenite structure, which is a resource-saving and low-cost austenitic stainless steel. High nitrogen austenitic stainless steel has the characteristics of high strength and high toughness, and it still has high strength and toughness matching at low temperature (4K). In addition, high nitrogen austenitic stainless steel has good corrosion resistance due to the addition of nitrogen, especially p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/173
CPCB23K9/173B23K35/3086B23K35/40
Inventor 明珠王有祁柏关顺王伟冯胜强甄立玲
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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