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Welding wire

A welding wire and alloy technology, applied in the field of welding wire composition design, can solve the problems of increasing the cost of welding wire, and achieve the effect of ensuring cold crack resistance, high strength, and improving low temperature impact toughness

Inactive Publication Date: 2016-11-23
KUNSHAN MCC BAOSTEEL WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-strength steel welding materials with a yield strength of 700 MPa, the alloy system used is mainly Mn-Ni-Mo alloy system, in which the Ni content is more than 2.5%, and the Mo content is more than 0.7%. Increase wire cost

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0034] The composition and percentage of welding wire alloy are: C: 0.1%, Mn: 1.4%, Si: 0.4%, Ni: 2.1%, Mo: 0.5%, Cr: 0.2%, microalloy: Ti: 0.020%, Zr: 0.020 %, the rest is iron, and the content of non-gold elements is: S: 0.010%, P: 0.015%, N: 70PPm, O: 50PPm.

specific Embodiment approach 2

[0035] C: 0.08%, Mn: 2.0%, Si: 0.9%, Ni: 1.8%, Mo: 0.3%, Cr: 0.6%, microalloying: Ti: 0.010%, the rest is iron, and the content of non-gold elements is: S : 0.008%, P: 0.01%, N: 50PPm, O: 40PPm.

specific Embodiment approach 3

[0036] C: 0.07%, Mn: 1.7%, Si: 0.6%, Ni: 1.9%, Mo: 0.4%, Cr: 0.4%, microalloying: Zr: 0.015%, the rest is iron, and the content of non-gold elements is: S : 0.010%, P: 0.015%, N: 70PPm, O: 50PPm.

[0037] The above three specific implementation methods are respectively made through the process sequence of welding wire smelting, off-line pickling, welding wire drawing, welding wire copper plating, welding wire layer winding, and adding welding wire annealing process in the welding wire drawing process.

[0038]The comprehensive performance of the welding wire produced according to the components designed in the present invention is better, and the tensile strength, relaxed diameter and warp distance of the welding wire are important factors for judging the welding wire, wherein the relaxed diameter and warp distance are important factors affecting the wire feeding performance of the welding wire during the welding process, The control standard is that the relaxed diameter is ≥8...

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Abstract

The invention discloses a welding wire with a favorable comprehensive mechanical property. A welding wire alloy system adopts a Mn2-Ni2-Cr-Mo system, and the alloy comprises the components in percentage by weight: less than or equal to 0.10 percent of C, 1.4 to 2.0 percent of Mn, 0.4 to 0.9 percent of Si, 1.8 to 2.1 percent of Ni, 0.3 to 0.5 percent of Mo, 0.2 to 0.6 percent of Cr, less than or equal to 0.020 percent of Ti, less than or equal to 0.020 percent of Zr, and the balance Fe. According to the welding wire designed by the invention, the yield strength of deposited metal exceeds 890MPa, and in order to enable the welding wire to ensure higher strength as well as favorable plasticity and low-temperature impact property of the deposited metal at the same time, the main alloy system of the welding wire adopts the Mn2-Ni2-Cr-Mo system, and a certain amount of microalloying elements Ti and Zr is added, so that the deposited metal is ensured to have not only higher strength, but also favorable plasticity and low-temperature impact property, and the cold crack resistance of weld metal is ensured under the conditions of lower or appropriate preheating temperature.

Description

technical field [0001] The invention belongs to the field of welding wire research and development, and in particular relates to a composition design of welding wire. Background technique [0002] In order to ensure the safety and reliability of high-strength steel welded structures, improve the service life of products, and avoid brittle failure accidents, improving the strength and toughness of weld metal by selecting high-quality welding materials has always been the focus of welding technicians' research work. Focusing on the strengthening and toughening of low-alloy high-strength steel weld metal, welding technicians at home and abroad have conducted a large number of experimental studies. For weld metal with a yield strength of no more than 550MPa, Ti-B microalloying can be used to make the weld metal obtain Uniform and fine acicular ferrite structure, so as to realize the strengthening and toughening of weld metal; and for weld metal with yield strength exceeding 550M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 张显辉
Owner KUNSHAN MCC BAOSTEEL WELDING CONSUMABLES