Acidic high-strength and high-toughness flux-cored wire
A flux-cored welding wire, high-strength and high-toughness technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of low low-temperature impact toughness, hydrogen-cooled cracks are easy to occur, and the toughness of welded joints decreases.
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Embodiment 1
[0043] An acidic high-strength and high-toughness flux-cored welding wire, in which the steel strip is SPCC low-carbon steel strip, and the filling rate is 14%. The composition of the drug core is: 407 parts of rutile; 35 parts of feldspar; 20 parts of quartz; 15 parts of zircon sand; 10 parts of magnesia; 7 parts of sodium fluoride; 10 parts; magnesium powder 11 parts; silicon calcium alloy 7 parts; aluminum magnesium alloy 10 parts; 75# ferrosilicon 35 parts; rare earth ferrosilicon 20 parts; metal manganese 164 parts; nickel powder 145 parts; parts, iron powder 19 parts. Flux core powder and low-carbon SPCC steel strip are made into φ1.2 flux cored wire through baking, rolling, drawing, layer winding and other processes.
[0044] In this embodiment, the protective gas is carbon dioxide gas, the welding current is 220-260A, the welding voltage is 28-30V, the welding line energy is 10-15KJ / cm, the welding test plate is 20mm thick, and the isolation layer is welded according ...
Embodiment 2
[0048] An acidic high-strength and high-toughness flux-cored welding wire. Except as follows, all the other are the same as embodiment 1.
[0049] Among them, the steel strip adopts SPCC low-carbon steel strip, and the filling rate is 15%. The composition of the drug core is: 380 parts of rutile; 32 parts of feldspar; 20 parts of quartz; 14 parts of zircon sand; 9 parts of magnesia; 7 parts of sodium fluoride; 9 parts; magnesium powder 10 parts; silicon calcium alloy 7 parts; aluminum magnesium alloy 8 parts; 75# ferrosilicon 33 parts; rare earth ferrosilicon 19 parts; metal manganese 153 parts; nickel powder 135 parts; parts, iron powder 83 parts.
[0050] In the welding process of this embodiment, there is less spatter, the weld seam is beautifully formed, slag is easy to remove, and all-position welding is better. Analyze the chemical composition and mechanical properties of the weld metal after welding. The chemical composition of the deposited metal is: C: 0.063wt%, M...
Embodiment 3
[0053] An acidic high-strength and high-toughness flux-cored welding wire. Except as follows, all the other are the same as embodiment 1.
[0054] Among them, the steel strip adopts SPCC low-carbon steel strip, and the filling rate is 16%. The composition of the drug core is: 360 parts of rutile; 30 parts of feldspar; 20 parts of quartz; 14 parts of zircon sand; 9 parts of magnesia; 7 parts of sodium fluoride; 9 parts; magnesium powder 10 parts; silicon calcium alloy 6 parts; aluminum magnesium alloy 7 parts; 75# ferrosilicon 30 parts; rare earth ferrosilicon 18 parts; metal manganese 144 parts; nickel powder 127 parts; parts, 132 parts of iron powder.
[0055] In the welding process of this embodiment, there is less spatter, the weld seam is beautifully formed, slag is easy to remove, and all-position welding is better. Analyze the chemical composition and mechanical properties of the weld metal after welding.
[0056] The chemical composition of the deposited metal is: C...
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