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3Ni-1.6Cr-0.5Mo submerged arc welding wire matched with steel for nuclear power equipment

A kind of equipment, nuclear power technology, applied in welding equipment, metal processing equipment, welding medium and other directions, can solve the problem that welding materials are not easy to obtain

Active Publication Date: 2020-05-15
CFHI DALIAN HYDROGENANT REACTOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the advanced nature and scientific frontier of SA508Gr.4N steel, it can meet the needs of nuclear container welding at home and abroad, and has high strength, high toughness, and good low temperature plasticity (RT NDT ≤-60℃) welding materials are not easy to obtain

Method used

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  • 3Ni-1.6Cr-0.5Mo submerged arc welding wire matched with steel for nuclear power equipment
  • 3Ni-1.6Cr-0.5Mo submerged arc welding wire matched with steel for nuclear power equipment

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Embodiment 1 and 2

[0020] Examples 1 and 2: According to the chemical composition of the welding wire in the present invention, two batches of welding wire steel were refined, the chemical composition of which is shown in Table 1, and drawn into φ4 submerged arc welding wire after annealing. Then apply the research and development welding wire and the nuclear-grade high-alkalinity low-hydrogen flux TYF-13HR for matching welding. The mechanical properties of the deposited metal are shown in Table 2 and Table 3.

[0021] Table 1 embodiment 1 and 2 welding wire chemical composition;

[0022] serial number C Si mn P S Cr Ni co Fe Example 1 0.10 0.12 1.60 ﹤0.005 0.002 1.65 3..69 ﹤0.01 margin Example 2 0.11 0.14 1.58 0.005 0.002 1.72 3.73 ﹤0.01 margin

[0023] Table 2 embodiment 1 and 2 weld metal properties;

[0024]

[0025] Table 3 Weld metal properties of Examples 1 and 2.

[0026]

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Abstract

The invention discloses a 3Ni-1.6Cr-0.5Mo submerged arc welding wire matched with steel for nuclear power equipment. The alloy comprises the following components of, in percentage by mass, 0.10%-0.15%of C, 0.30%-2.00% of Mn, less than or equal to 0.20% of Si, less than or equal to 0.005% of P, less than or equal to 0.005% of S, 0.45%-0.65% of Mo, 3.00%-3.90% of Ni, 1.50%-1.90% of Cr, less than orequal to 0.020% of Cu, less than or equal to 0.020% of Co, less than or equal to 0.0005% of B, less than or equal to 0.010% of Nb, less than or equal to 0.005% of As, less than or equal to 0.005% ofSn, and the balance Fe. The submerged arc welding wire is matched with an independently developed welding flux so as to meet the welding requirements of SA508Gr.4N steel and improved steel thereof, and meanwhile, the welding efficiency and the welding quality can be greatly improved.

Description

technical field [0001] The invention relates to the field of nuclear power welding materials, in particular to a high-strength, high-toughness 3Ni-1.6Cr-0.5Mo steel submerged arc automatic welding wire for nuclear primary equipment. Background technique [0002] With the further increase of electricity demand and the increasing pressure of energy conservation and emission reduction, nuclear power has become a relatively mature clean energy. A development trend of nuclear power technology and construction planning is to continuously increase the capacity of a single reactor. The increase in the capacity of a single reactor will inevitably lead to the enlargement of reactor pressure vessels and evaporator tube sheets. Nuclear reactor pressure vessels and evaporator tube sheets are used The weight and thickness of forgings are increasing. At present, the general steel for nuclear reactor pressure vessels in various countries is SA508-3 steel of 620MPa grade. With the continuou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/3066
Inventor 张秀海高蕊王富铭刘学利段莉蕾李兆峰
Owner CFHI DALIAN HYDROGENANT REACTOR
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