800MPa-grade high-strength high-tenacity gas shielded welding wire

A gas shielded welding wire, high-strength technology, used in welding media, welding equipment, welding equipment, etc., can solve problems such as hot brittleness, uneven chemical composition, precipitation, etc., and achieve the effect of improving toughness

Active Publication Date: 2010-06-16
山东索力得焊材股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these two kinds of welding wires can meet the strength requirements of the weld metal, because the welding wire invented by patent CN1709635A contains 0.1-0.55% Cu, the welding wire invented by patent CN1654160A contains 0.01-0.05% Nb, and Cu and Nb elements belong to precipitation Strengthening ele

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with embodiment.

[0015] According to the scope of the chemical composition of the present invention, two heats of welding wire steel are smelted in a vacuum induction furnace. When smelting, add pure iron, carbon, silicon, chromium, molybdenum and nickel at the same time, and smelt after vacuuming. After all the alloys are melted, add metal manganese, titanium and zirconium, and pass pure argon into the furnace to Prevent excessive evaporation of manganese and ensure the composition ratio of alloying elements. The smelted welding wire steel ingot is processed into a finished welding wire with a diameter of 1.2 mm through forging, rolling, wire drawing, copper plating and shaft winding. The chemical composition of the welding wire is shown in Table 1. Two welding wires use Ar+20% CO 2 Argon-rich gas shielded welding can ensure the high strength and high toughness of the weld metal.

[0016] The we...

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Abstract

The invention provides a 800MPa-grade high-strength high-tenacity gas shielded welding wire which is suitable for welding engineering machinery, coal mine machinery, railroad bridges, hydropower industry, delivery lines and high-pressure containers. The gas metal arc welding wire contains the chemical compositions in weight percent: 0.05-0.10 percent of C, 0.20-0.60 percent of Si, 1.60-2.10 percent of Mn, 1.8-2.4 percent of Ni, 0.2-0.6 percent of Mo, 0.10-0.50 percent of Cr, 0.04-0.10 percent of Ti, 0.02-0.08 percent of Zr, not more than 0.010 percent of S, not more than 0.015 percent of P and the balance of Fe and unavoidable impurities. Since the Ar+20% CO2 argon-rich gas shielded welding is adopted by the welding wire, low-alloy high-strength steel the tensile strength Rm of which is not lower than 800MPa can be welded; under the as welded and postwelding thermal refining condition, weld metal has high strength and good low-temperature impact toughness.

Description

technical field [0001] The invention belongs to the field of welding materials, specifically a Ti and Zr microalloyed high-strength and high-toughness gas-shielded welding wire, which uses Ar+20% CO 2 Argon-rich gas shielding can weld low-alloy high-strength structural steel with a strength level greater than 800MPa. Background technique [0002] With the advancement of smelting technology and the application of controlled rolling, controlled cooling and microalloying elements, the performance of steel is developing towards high strength and high toughness, so as to reduce material consumption, reduce structural weight, and improve structural performance and safety. . This will put forward higher requirements on the strength and toughness of the welded joint, and then on the welding material and welding process. In recent years, 800MPa high-strength structural steel has been used in hydraulic supports of coal mining machinery, coupler frames of locomotives, transportation ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K9/16
Inventor 关常勇国旭明张金生王继杰
Owner 山东索力得焊材股份有限公司
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