460 MPa-grade seamless flux-cored wire suitable for full-position welding and manufacturing method
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A technology of seamless flux-cored welding wire and manufacturing method, which is applied in welding medium, manufacturing tools, welding equipment, etc., can solve the problems of high welding material price, unguaranteed supply, and high technical requirements, and achieve excellent seawater corrosion resistance, Beautiful weld shape and stable welding arc
Active Publication Date: 2017-11-17
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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[0003] 460MPa grade steel plate has good mechanical properties and welding performance, and is widely used in offshore platform equipment, ship construction and bridges, but the matching welding consumables have relatively high technical requirements, especially the stability and crack resistance of low temperature impact toughness are difficult to guarantee , so this level of flux-cored welding wire mainly depends on imports, but the price of foreign welding consumables is relatively high, and the supply cannot be guaranteed, resulting in delays in the construction of offshore platforms, ships and bridges
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Embodiment 1
[0029] Example 1: Rutile in drug core powder: 34%, quartz: 2%, sodium fluoride: 1.5%, zircon sand: 2.5%, feldspar: 4%, manganese-silicon alloy: 14%, electrolytic manganese: 3% , Low-carbon ferromanganese: 4%, aluminum-magnesium alloy: 2%, ferroboron: 0.5%, nickel powder: 4%, the balance is iron powder, the powder filling rate is 15%, and the diameter of the welding wire is Ф1.2mm.
Embodiment 2
[0030] Example 2: Rutile in drug core powder: 36%, quartz: 2.5%, sodium fluoride: 2%, zircon sand: 2.5%, feldspar: 4%, manganese-silicon alloy: 14%, electrolytic manganese: 4% , Low-carbon ferromanganese: 4%, aluminum-magnesium alloy: 2.5%, ferro-boron: 0.5%, nickel powder: 5%, the balance is iron powder, powder filling rate 15%, wire diameter Ф1.4mm.
Embodiment 3
[0031] Example 3: Rutile in drug core powder: 40%, quartz: 2.5%, sodium fluoride: 2%, zircon sand: 3%, feldspar: 5%, manganese-silicon alloy: 16%, electrolytic manganese: 5% , Low-carbon ferromanganese: 3%, aluminum-magnesium alloy: 3%, ferroboron: 0.5%, nickel powder: 5%, the balance is iron powder, powder filling rate 16%, wire diameter Ф1.6mm.
[0032] The present invention is a 460MPa seamless flux-cored wire suitable for all-position welding: the sheath is made of SPHC steel strip, and its properties are shown in Table 1. The chemical composition and mechanical properties of welding wire deposited metal are shown in Table 2 and Table 3. The diffusible hydrogen content of deposited metal is shown in Table 4.
[0033] Table 1 Performance requirements for SPHC steel strip
[0034]
[0035] Table 2 Chemical composition of welding wire deposited metal
[0036]
[0037] Table 3 Mechanical properties of welding wire deposited metal
[0038]
[0039] Table 4 Diffusio...
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Abstract
The invention relates to a 460 MPa-grade seamless flux-cored wire suitable for full-position welding and a manufacturing method. The flux-cored wire comprises a SPHC steel-tape sheath and filling powder, wherein the filling powder comprises, by weight percentage, 32-42% of rutile, 2-3% of quartz, 1.5-2.5% of sodium fluoride, 2-3% of zircon sand, 3-5% of feldspar, 14-16% of manganese silicon alloy, 3-5% of electrolytic manganese, 3-5% of low-carbon ferromanganese, 2-3% of aluminium magnesium alloy, 0.3-0.5% of ferroboron, 4-6% of nickel powder and the balance iron powder; and the filling rate of the powder is 14-16%. The manufacturing method comprises the steps of carrying out on-line filling and welding, reducing the diameter of the wire to phi 1.2mm-phi 1.6mm by using rollers and a wire drawing die, and carrying out annealing on the wire under the condition that the temperature is 700 DEG C and the time of heat preservation is 3 hours in the diameter reducing process. The 460 MPa-grade seamless flux-cored wire suitable for full-position welding is stable in welding arc under the protection effect of carbon dioxide gas, has good full-position welding manufacturability, and can be used for downhand welding, vertical-up welding, horizontal-position welding and overhead welding; and the formed welding seam is attractive in appearance.
Description
technical field [0001] The invention relates to the technical field of welding materials, in particular to a 460MPa grade seamless flux-cored welding wire suitable for all-position welding and a manufacturing method thereof. Background technique [0002] With the development of economy and society, the strength level of steel plates used in marine engineering equipment, shipbuilding and bridges is gradually increasing, especially marine engineering equipment and ships have been immersed in the sea for many years, so the strength, corrosion resistance, Impact toughness and crack resistance requirements are getting higher and higher. [0003] 460MPa grade steel plate has good mechanical properties and welding performance, and is widely used in offshore platform equipment, ship construction and bridges, but the matching welding consumables have relatively high technical requirements, especially the stability and crack resistance of low temperature impact toughness are difficult...
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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/36B23K35/40
CPCB23K35/3053B23K35/3608B23K35/406
Inventor 李猛张文军郭纯
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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