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700MPa low-alloy high-strength welding wire for heavy machinery and use method thereof

A low-alloy high-strength, heavy-duty machinery technology, used in welding media, welding equipment, welding equipment and other directions, can solve the problems of large splash, high price, scarcity of nickel and molybdenum elements, etc., to prevent performance degradation, high price, improve low temperature The effect of toughness

Active Publication Date: 2013-01-16
山东索力得焊材股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, 700MPa high-strength welding consumables, including welding wires and electrodes at home and abroad, are mostly nickel-molybdenum steel types, such as ER69-3 nickel-molybdenum steel welding wire in the original GB / T8110-1995, with a nickel content of about 0.9% and a molybdenum content of about 0.3 %, other welding materials such as E7018-M and E7518-M are also nickel-molybdenum steel welding materials, the nickel content is about 1.25-2.50%, and the molybdenum content is about 0.3-0.5%. Due to the scarcity of nickel and molybdenum elements, the price is very expensive and cost-effective Poor, ER69-3 welding wire uses carbon dioxide as shielding gas, large spatter during welding and poor forming

Method used

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  • 700MPa low-alloy high-strength welding wire for heavy machinery and use method thereof
  • 700MPa low-alloy high-strength welding wire for heavy machinery and use method thereof
  • 700MPa low-alloy high-strength welding wire for heavy machinery and use method thereof

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Embodiment Construction

[0030] The relevant technical contents not mentioned below can adopt or learn from the prior art.

[0031] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the application, rather than Full examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0032] According to the chemical composition range of the welding wire of the present invention and the mass percentages used in the following examples, a multi-furnace welding wire steel was smelted in a vacuum induction furnace, and processed into a diameter of 1.2 mm through forging, rolling, wire drawing, copper plating and shaft winding. The c...

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Abstract

The invention provides a low-alloy high-strength welding wire suitable for heavy machinery. The low-alloy high-strength welding wire is characterized in that the strength of a deposited metal is more than 700MPa, the elongation is greater than 16% and the impact energy is more than 47J at minus 20 DEG C.; the welding wire has the advantages of stable electric arc, relatively small spatter and beautiful welding seam forming during use. Chemical components (by mass percent, %) of the welding wire with gas metal arc welding are as follows: 0.06-0.09% of C, 0.40-0.60% of Si, 1.40-1.70% of Mn, 0.4-0.6% of Ni, 0.30-0.50% of Mo, 0.15-0.25% of Cr, 0.02-0.04% of V, 0.05-0.15% of Ti, 0.002-0.005% of B, less than or equal to 0.015% of S, less than or equal to 0.015% of P, less than or equal to 0.0025% of O, less than or equal to 0.0070% of N, and the balance of Fe and inevitable impurities. Ar +20% CO2 argon-rich gas protection is adopted by the welding wire for welding, so that the deposited metal has high low-temperature toughness under the conditions of as-welded and post-welding heat treatment.

Description

technical field [0001] The invention relates to a gas-shielded welding wire, in particular to a 700MPa low-alloy high-strength welding wire for heavy machinery. Background technique [0002] High-strength welding wire is produced with the rapid development of my country's industry in recent years. It is the development goal of 2011-2020 in the "Guidelines for the Development of Science and Technology of China's Iron and Steel Industry". The development of high-strength welding wire is more policy-feasible. As a substitute product for welding rods, welding wire is encouraged by the state to be researched and developed. The project "Technology Development and Application of High-performance, High-quality and Upgraded Products" is a project encouraged by the state. [0003] With the rapid development of heavy machinery such as tower cranes, static pile drivers, construction elevators, submersible drilling machines, high-pressure rotary pile sprayers, and concrete mixers, the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/16
Inventor 关常勇曲传送孙洪刚
Owner 山东索力得焊材股份有限公司
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