Little slag self-protection hard-surface flux-cored wire for build-up welding
A self-protection and hard surface technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of reducing work efficiency and increasing the workload of construction personnel, so as to improve production efficiency, reduce workload, cost reduction effect
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Embodiment 1
[0029] Choose a 12x0.3 (width 12mm, thickness 0.3mm) low carbon steel strip, and roll it into a U shape after cleaning. Take 1300g of high-carbon ferrochromium, 70g of high-carbon ferromanganese, 30g of 75# ferrosilicon, 50g of graphite, 50g of iron powder, TiO 2 6g, calcium fluoride 3g, sodium fluorosilicate 5g, calcium carbonate 3g, aluminum-magnesium alloy powder 9g, put them together in a drying oven at 120 degrees Celsius and bake for 4 hours, then put them into a mixer and mix well. The mixed medicine powder is added into the U-shaped steel belt groove through a powder feeder to form, and the filling rate of the medicine powder is 47%. The wire is drawn and reduced to a diameter of 2.8 mm by a wire drawing machine for 5 times. Under the voltage of 29.6-30.3V and the current of 280-360A, open arc surfacing welding is carried out, and the macroscopic hardness of the surfacing layer is 56HRC.
Embodiment 2
[0031] Choose a 16x0.4 (width 16mm, thickness 0.4mm) low-carbon steel strip, and roll it into a U shape after cleaning. Take 1400g of high-carbon ferrochrome, 65g of high-carbon ferromanganese, 50g of 45# ferrosilicon, 55g of graphite, 25g of iron powder, TiO 2 10g, calcium fluoride 5g, fluoride 5g, lithium fluoride 3g, sodium fluorosilicate 3g, calcium carbonate 3g, aluminum-magnesium alloy powder 15g, put them together in a drying oven at 120 degrees Celsius and bake for 4 hours, then put them in the mixing Mix well in the feeder. The mixed powder is added to the U-shaped steel belt groove through a powder feeder to form, and the filling rate of the powder is 49%. The wire is drawn and reduced to a diameter of 3.2 mm by a wire drawing machine for 6 times. Under the voltage of 29.6-30.3V and the current of 300-420A, open arc surfacing welding is carried out, and the macroscopic hardness of the surfacing layer is 58HRC.
Embodiment 3
[0033] Choose a 12x0.3 (width 12mm, thickness 0.3mm) low carbon steel strip, and roll it into a U shape after cleaning. Take 1200g of high-carbon ferrochrome, 65g of high-carbon ferromanganese, 30g of 75# ferrosilicon, 45g of graphite, 50g of iron powder, TiO 2 8g, lithium fluoride 4g, sodium fluorosilicate 8g, sodium carbonate 5g, aluminum-magnesium alloy powder 13g, put them together in a drying oven at 120 degrees Celsius and bake for 4 hours, then put them into a mixer and mix well. The mixed powder is fed into the U-shaped steel belt groove through the powder feeder to form, and the filling rate of the powder is 50%. The wire is drawn and reduced to a diameter of 2.8mm by a wire drawing machine for 4 times. Under the voltage of 29.6-30.3V and the current of 280-360A, open arc surfacing welding is carried out, and the macroscopic hardness of the surfacing layer is 55HRC.
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