Flux-cored wire for electroslag welding
A technology of welding wire and medicine, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of lack of supporting electroslag welding wire, inability to perform electroslag welding, and reduce welding efficiency, etc., and achieve the goal of electroslag welding process Stability, avoiding wire feeding stuttering, and excellent comprehensive mechanical properties
Inactive Publication Date: 2018-06-05
HAINING RUIAO METAL TECH CO LTD
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Problems solved by technology
At present, in the construction of ships, marine engineering, buildings, bridges and other structures, there are many steel plates of F grade (requiring -60°C impact power ≥ 47J) steel plates, but due to the lack of supporting electroslag welding wire, electroslag welding cannot be carried out. Welding, greatly reducing welding efficiency
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[0026] Alloy and mineral powder are filled in the tube rolled into the steel sheath (steel sheath composition: 0.02%C, 0.05%Si, 0.50%Mn, 0.012%P, 0.006%S, the rest is Fe and unavoidable impurity elements) , which are drawn into flux-cored wires with a diameter of 1.6mm as shown in Table 1, wherein No.1-No.5 are examples in accordance with the present invention, and No.6-No.10 are not in the composition range of the present invention comparative example.
[0027] Table 1 embodiment welding wire chemical composition
[0028]
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Abstract
The invention provides a flux-cored wire capable of being used for electroslag welding. The wire is the flux-cored wire, wherein steel outer skin is filled with an alloy and mineral powder, wherein relative to the total mass of the wire, the alloy and mineral powder comprises the following components in percentage by weight: 0.03-0.10% of C, 0.15-0.40% of Si, 1.00-1.60% of Mn, 0.10-1.00% of Ni, 0.30-0.60% of Mo, 0.05-0.10% of Ti, 0.003-0.005% of B, 3.0-5.0% of TiO2, 0.3-0.5% of Al2O3, 0.50-1.50% of MgO and the balance of ferrum and inevitable impurities. The wire can be used for electroslag welding of steel plates. When the weld heat input is smaller than or equal to 1000kJ / cm, the tensile strength of the weld joint metal is greater than or equal to 600MP, and the impact energy at 60 DEG Cbelow zero is greater than or equal to 100J.
Description
technical field [0001] The invention relates to a flux-cored welding wire for electroslag welding, which is suitable for electroslag welding of steel plates with a thickness less than or equal to 120mm in the fields of ships, marine engineering, buildings, bridges, etc., and belongs to the field of welding materials. Background technique [0002] In recent years, with the development of high-efficiency welding technology, electroslag welding technology has been more and more widely used in ships, marine engineering, construction, bridges and other fields. However, due to the large heat input in the electroslag welding process, the weld cooling If the speed is too slow, the weld structure will be coarsened, which will lead to the deterioration of the low temperature toughness of the weld metal. [0003] At present, there are some related technologies for welding wire used in electroslag welding, for example: JP8164497A and JP59179289A adopt Cr-Ni-Mo technology to make electro...
Claims
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IPC IPC(8): B23K35/30
CPCB23K35/3053
Inventor 李小宝黄婷粉川博之
Owner HAINING RUIAO METAL TECH CO LTD