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Gas shielded welding solder wire with 900-MPa yield strength

A technology of gas shielding and yield strength, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of low toughness of high-strength steel weld metal, and achieve the effect of fine structure

Active Publication Date: 2013-04-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a gas shielded welding wire with a yield strength of 900 MPa to solve the problem of low toughness of high-strength steel weld metal

Method used

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  • Gas shielded welding solder wire with 900-MPa yield strength
  • Gas shielded welding solder wire with 900-MPa yield strength

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Embodiment Construction

[0011] Below in conjunction with embodiment further specifically illustrate this patent. But the scope of protection of this patent is not limited to specific implementation manners.

[0012] Within the composition range of the high-strength and high-toughness gas-shielded welding wire of the present invention, a total of 8 furnaces of welding wire were smelted, and the composition of the welding wire is shown in Table 1. After the welding wire is welded by MIG, the mechanical properties of the deposited metal are shown in Table 2. The deposited metal structure of its welding wire is a mixed structure of bainite and martensite.

[0013] Table 1 Chemical composition of welding wire

[0014]

[0015] Table 2 Mechanical properties of deposited metal

[0016]

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Abstract

The invention discloses a gas shielded welding solder wire with 900-MPa yield strength. The gas shielded welding solder wire consists of, by mass, C 0.05-0.09%, Si 0.35-0.50%, Mn 1.40-1.70%, Cr 0.50-0.90%, Ni 2.8-3.5%, Mo 0.50-0.90%, Ti 0.01-0.03%, La 0.005%-0.02% and the balance ferrum. When the gas shielded welding solder wire is welded through metal-inert gas welding (MIG), the welded solder wire is intensive and stable, a weld joint microstructure is a bainite and martensite mixed microstructure and is thin and small, high-strength high-toughness weld joint metal can be obtained, the deposited metal yield strength is larger than 950 MPa, and absorbed energy in impact at the temperature of 50 DEG C is larger than 50 J.

Description

technical field [0001] The invention relates to a welding material, in particular to a gas shielded welding wire with a yield strength of 900MPa. Background technique [0002] MIG (melting inert gas shielded welding) welding method has become the preferred welding method for high-strength steel with a yield strength greater than 900MPa due to its high welding efficiency and high weld toughness. It has been widely used in engineering and is usually used with a nickel content of 2wt. %~3wt% manganese nickel chromium molybdenum welding wire for 900MPa high strength steel. Its typical representative is the MIL140S welding wire in the US military standard MIL-E-24355B, and its main alloy composition is: carbon (C) <0.12 wt%, silicon (Si): 0.30wt%-0.50wt%, manganese (Mn): 1.50wt%-2.00wt%, nickel (Ni) 1.95wt%-3.10wt%, Cr (chromium): 0.65wt%-1.05wt%, molybdenum (Mo): 0.40wt%-1.00wt%, vanadium (V) : <0.04wt%. The advantages of this type of welding wire are: its alloy system ...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 张京海邓晚平杨澍
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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