A self-shielding flux-cored welding wire for welding in wading environment
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A technology of flux-cored welding wire and self-protection, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of excessive smoke and gas generation, affecting joint performance, etc., and achieve no arc extinguishing phenomenon, The arc combustion is stable and the shape is beautiful.
Active Publication Date: 2020-06-30
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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When underwater wet welding with flux-cored wire is used for welding in a wading environment, more smoke and gas are generated, and a large number of pores are likely to be generated in the weld, which affects the performance of the joint
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Embodiment 1
[0023] Embodiment one: the composition and weight percent of medicinal powder are: rutile 37%, iron oxide 18%, aluminum oxide 6%, calcium carbonate 8%, fluoride 4%, titanium powder 2%, nickel powder 6%, molybdenum powder 1% , Iron powder 18%.
Embodiment 2
[0024] Embodiment two: the composition and weight percent of medicinal powder are: rutile 44%, iron oxide 12%, aluminum oxide 8%, calcium carbonate 6%, fluoride 6%, titanium powder 3%, nickel powder 4%, molybdenum powder 1.5% , Iron powder 15.5%.
Embodiment 3
[0025] Embodiment three: the composition and weight percent of medicinal powder are: rutile 48%, iron oxide 10%, aluminum oxide 5%, calcium carbonate 7%, fluoride 5%, titanium powder 4%, nickel powder 8%, molybdenum powder 2% , Iron powder 11%.
[0026] Adjust the composition and content of the core powder according to the above ratio, prepare the core powder, and prepare three kinds of flux cored wires with different component contents. The particle size of the core powder is 80 mesh, and put the prepared core powder into the powder mixer for mixing Take it out for 5-6 hours and set aside.
[0027] The metal sheath of the flux-cored welding wire is made of low-carbon steel strip with a specification of 0.3mm×9mm. It is produced according to the ordinary flux-cored welding wire preparation process. The above-mentioned uniformly mixed flux core powder is added to the metal sheath to prepare a cross-section It is an "O" type flux-cored wire with a wire diameter of The filling...
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Abstract
The invention discloses a self-protection flux-cored wire for welding under a water environment. The self-protection flux-cored wire for welding under the water environment comprises a metal skin anda flux core. The flux core comprises components including, by mass percent, 35%-55% of rutile, 10%-20% of ferric oxide, 5%-12% of aluminum oxide, 5%-10% of calcium carbonate, 3%-8% of fluoride, 2%-5%of titanium powder, 4%-8% of nickel powder, 1%-2% of molybdenum powder and 15%-25% of iron powder. The self-protection flux-cored wire can be used for carrying out welding under the water environment,arc starting is easy during welding, arc combustion is stable, excellent welding process performance is achieved, obtained welding lines are attractive in forming, the extension strength of depositedmetal after welding is larger than 540 MPa, no cracks appear when a butt joint is 4 times the thickness of a plate and the cold bending angle is 180 degrees, good impact toughness is achieved, and welding of low-carbon and medium-carbon steel and low-alloy high-strength steel under the water environment is met.
Description
technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a self-protecting flux-cored welding wire for welding in a wading environment. Background technique [0002] Due to the advantages of high production efficiency, good welding quality and low labor intensity, automatic welding has been widely used in construction machinery and petrochemical industries. With the improvement of the level of automated welding in my country, there are more and more demands for automated welding in some special environments, such as welding with wet or wet surfaces, or welding in rainy environments, which are collectively referred to as welding in wading environments . When welding in this environment, it is usually necessary to dry the workpiece, and then perform welding when there is no moisture on the surface of the workpiece, but its complicated pre-weld treatment greatly reduces the welding efficiency in the wading environmen...
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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3053B23K35/3608B23K35/368
Inventor 李海新杜永鹏杨振林张琳琳韩焱飞殷子强张婧袁新
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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