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Gas shield welding wire for nuclear power

A technology of gas shielded welding and nuclear power, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of weld metal toughness decline, insufficient strength and toughness, etc., and achieve small welding spatter and stable mechanical properties , good workmanship

Inactive Publication Date: 2012-07-04
ANGANG STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of decreased toughness of weld metal at low temperature and insufficient strength and toughness after long-term annealing, the present invention proposes a gas-shielded welding wire with good low-temperature impact toughness and good welding process performance, suitable for nuclear power structures

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  • Gas shield welding wire for nuclear power
  • Gas shield welding wire for nuclear power
  • Gas shield welding wire for nuclear power

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Embodiment Construction

[0017] The specific embodiment of the present invention is introduced in detail below:

[0018] A 0.5-ton converter is used to smelt welding wire steel with low S and P raw materials. During the smelting process, the content of O, N and other gases in the steel is controlled. There is no special requirement for the smelting process. The specific components are shown in Table 1. After smelting, the welding wire steel is processed into a specification of Φ1.2mm through the processes of disc rolling, wire drawing, and surface copper plating. The welding wire is protected by a mixed gas (80%Ar+20%C02) for welding deposited metal tests. Welding process parameters The welding current is 220-260A, the welding voltage is 26-30V, the gas flow rate is 20L / min, and the welding input energy is 15-20KJ / cm. The mechanical properties are shown in Table 2. Table 3 shows the properties of the deposited metal of the welding wire after the annealing treatment at 593°C-620°C for not less than 10...

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Abstract

The invention discloses a gas shield welding wire for nuclear power. By weight percentage, chemical components of the welding wire include 0.06-0.12% of C (carbon), 1.60-2.10% of Mn (manganese), 0.50-0.80% of Si (silicon), 1.40-1.80% of Ni (nickel), 0.1-0.3% of Ti (titanium), less than or equal to 0.025% of S (sulfur), less than or equal to 0.025% of P (phosphorus), 0.15-0.5% of Mo (molybdenum), 0.001-0.006% of B (boron) and the balance Fe (ferrum) and other inevitable impurities. The gas shield welding wire is less in welding spatter, fine in process and stable in mechanical performance, the tensile strength of weld metal ranges from 620MPa to 735MPa, the yield strength of the gas shield welding wire is higher than or equal to 415MPa, Akv8 at the temperature of -29 DEG C is larger than or equal to 47, and the requirements of the gas shield welding wire on strength and ductility can be ensured to be the same as those of the gas shield welding wire on as-welded conditions after no less than 10 hours of annealing treatment at the temperature ranging from 593 DEG C to 620 DEG C.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a gas-shielded welding wire for nuclear power. Background technique [0002] In recent years, with the rapid development of the domestic economy, the demand for energy has become increasingly tense. Nuclear energy, as the cleanest and safest energy source, has made great progress in China. As an efficient welding method, gas shielded welding is widely used in the construction of various steel structures. Different application environments and different steel types require that the corresponding welding materials have different characteristics to adapt to it. The containment shell for nuclear power The steel structure requires that the strength and impact performance of the steel after heat treatment and rolling will not decrease, and the construction standards require that the corresponding welding materials have the same performance as the steel type. And there is no correspond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 傅博刘孟程钢
Owner ANGANG STEEL CO LTD
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