Welding method of low alloy steel plate and ship steel plate
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A technology of marine steel plate and welding method, applied in welding equipment, metal processing, arc welding equipment, etc., can solve the problems of large deformation of welding structure, poor overall quality of welding seam, low welding productivity, etc. Overall welding quality assurance, the effect of improving production efficiency
Active Publication Date: 2016-09-21
中船桂江造船有限公司
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[0003] The purpose of the present invention is to provide a process for welding low-alloy steel plates and marine steel plates, which can solve the problems of low welding productivity, poor overall quality of welds, and large deformation of welded structures in shipyards. The problem
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[0042] Click here to weld the horizontal structure.
Embodiment 3
[0043] Example 3: Overhead butt welding of 903 low alloy steel plate + CCSB marine steel plate
[0044] Elevation position requirements: the weld inclination angle is 0°~15°, and the weld rotation angle is 165°~180°,
[0045] Welding equipment: YD-350GM welding machine is equipped with YW-35KB wire feeder, air-cooled automatic welding gun,
[0046] Welding wire: Supercored71 (flux-cored wire produced by Hyundai Corporation) Ф1.2
[0047] Gas: 99.9% CO 2 gas.
[0048] Process parameters: Table 3
[0049]
[0050] Click here to weld the structure upside down.
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Abstract
The invention discloses a welding method of a low alloy steel plate and a ship plate and relates to the technical field of welding. According to the welding method, through analysis and experiment, stipulates that grooves and surfaces of welding materials are subjected to dust cleaning before the two dissimilar steel boards are welded, wherein a weld width between the steel boards is less than 1mm; the back face of a slab joint is subjected to positioned welding with gas shielded welding, so that the positions of striking arc are full and arc suppression positions are filled with arc craters; welding is carried out with small specifications, multi-layer and multi-pass welding can be realized, and weld joints on each face are subjected to backing welding and cosmetic welding; for the slab joint, carbon arc gouging is adopted to machine the grooves, and the angle of the grooves is 60-70 degrees; the grooves are ground; a welding part and the both sides of the welding part are baked for dehumidification through a cutting torch before welding; the temperature of a weld joint layer and the inter-pass temperature are controlled to be below 100 DEG C. With the adoption of the welding method, the problems that by the conventional welding method for low alloy steel plates and ship steel plates, the welding production rate is low, the whole weld is poor in quality, and a welding structure is large in transformation can be solved.
Description
Technical field [0001] The invention relates to the technical field of welding, in particular to a process method for welding a low-alloy steel plate and a marine steel plate. Background technique [0002] In shipbuilding companies, we often encounter the situation of welding dissimilar steels with different linear expansion coefficients, such as welding low-alloy steel plates and marine steel plates. For the welding of low-alloy steel and marine steel plates, E5015 electrodes have been used in the past. Electrode arc welding, due to the characteristics of the material itself, must be welded by manual arc welding, which has low work efficiency, difficult welding operations, and high labor intensity of the welder; because the E5015 electrode arc welding has a large heat input, and the low alloy steel plate has strength Due to the characteristics of high linear expansion coefficient, it is easy to produce welding deformation during welding, especially when welding thin plates, ther...
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