Flux-cored welding wire for shovel tooth surfacing welding and preparation method thereof
A technology of flux-cored welding wire and shovel teeth, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of low cost, high cost, long procurement cycle, etc., achieve low cost, reduce production cost, and improve anti-cracking ability. Effect
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[0028] A method for preparing a flux-cored welding wire for shovel tooth surfacing, comprising the following steps:
[0029] 1) Mix rutile powder, feldspar powder and fluorspar powder and heat up to 230-250°C, then add micro-carbon ferrochrome powder, high-carbon ferromanganese powder, ferrosilicon powder, ferromolybdenum powder, nickel powder, magnesium aluminum powder, Mix reduced iron powder, magnesia powder and sodium fluorosilicate, heat up to 120-150°C, keep warm for 55-60 minutes, then mix the two parts of alloy powder, heat up to 630-650°C, keep warm for 45-50 minutes, and then air-cool to room temperature;
[0030] 2) After cleaning the low-carbon cold-rolled steel strip, dry it at 100-120° C., roll it into a U-shaped groove, and then add the alloy powder obtained in the above step 1) to the U-shaped groove; close the U-shaped groove, It is closed into an O shape on a forming machine, and then through continuous drawing and diameter reduction, a flux-cored welding wi...
Embodiment 1
[0035] A flux-cored welding wire for shovel-tooth surfacing welding, which is composed of a flux core and a low-carbon cold-rolled steel strip sheath wrapped outside the flux core. The raw materials of the flux core include: 10.6 parts by weight of micro-carbon ferrochrome powder, high-carbon ferromanganese powder 9.5 parts, 5.2 parts of ferrosilicon powder, 8.6 parts of ferromolybdenum powder, 2.6 parts of nickel powder, 9.5 parts of magnesium aluminum powder, 30.0 parts of reduced iron powder, 1.3 parts of magnesium stone powder, 12.5 parts of rutile powder, 8 parts of feldspar powder, fluorite powder 2.8 parts, 0.1 parts of sodium fluorosilicate.
[0036] The filling factor of the flux cored wire is 29%.
[0037] A method for preparing a flux-cored welding wire for shovel tooth surfacing, comprising the following steps:
[0038] 1) Mix rutile powder, feldspar powder and fluorspar powder and heat up to 250°C, then add micro-carbon ferrochrome powder, high-carbon ferromangan...
Embodiment 2
[0043] A flux-cored welding wire for shovel-tooth surfacing welding, which is composed of a flux core and a low-carbon cold-rolled steel strip sheath wrapped outside the flux core. The raw materials of the flux core include: 13.5 parts by weight of micro-carbon ferrochrome powder, high-carbon ferromanganese powder 9.2 parts, 4.7 parts of ferrosilicon powder, 7.5 parts of ferromolybdenum powder, 2.8 parts of nickel powder, 9 parts of magnesium aluminum powder, 30.2 parts of reduced iron powder, 1.4 parts of magnesium stone powder, 13.0 parts of rutile powder, 9.6 parts of feldspar powder, fluorite powder 2.5 parts, 0.12 parts of sodium fluorosilicate.
[0044] The filling rate of the flux cored wire is 30.5%.
[0045] The preparation method and welding process parameters of the flux-cored wire are the same as those in Example 1, and the hardness of the surfacing layer is 63HRC, meeting the requirements for use.
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