A high-efficiency heat-generating drug core cutting wire for underwater wet arc cutting and its preparation method
An arc cutting, high-efficiency technology, applied in the direction of welding/cutting media/materials, manufacturing tools, welding equipment, etc., to reduce safety hazards, reduce cutting costs, and save cutting power
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Embodiment 1
[0034] 1. Drug core composition ratio
[0035] Weigh 4% sodium bicarbonate, 10% dolomite, 20% aluminum powder, 1% cerium oxide, and 65% potassium perchlorate.
[0036] 2. Preparation method
[0037] 1. Weigh the medicinal powder according to the proportion, first mix potassium perchlorate, sodium bicarbonate and dolomite evenly, then add rare earth oxide and mix evenly, pass through a 100-mesh sieve, and then mix the aluminum powder passed through an 80-mesh sieve with it;
[0038] 2. Dry the uniformly mixed powder at 50°C;
[0039] 3. Select the H08A steel strip with a thickness of 0.5mm, roll it into a U-shaped groove, fill the uniformly mixed powder into the U-shaped groove, close the U-shaped groove, and control the powder filling rate at 20%;
[0040] 4. Use a wire drawing machine to pass the drug core cut wire through drawing dies with different diameters, draw and reduce the diameter one by one, and finally obtain the drug core cut wire with a diameter of 2.2mm.
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Embodiment 2
[0044] The composition of the drug core according to the mass percentage is: 4% sodium bicarbonate, 11% dolomite, 18% aluminum powder, 1.5% lanthanum oxide, and 65.5% potassium perchlorate.
[0045] A H08A steel strip with a thickness of 0.5 mm was selected and prepared according to the preparation method in Example 1 to obtain a 2.2 mm diameter cored wire.
[0046] Under the conditions of cutting voltage of 35-40V and cutting current of 300-400A, the flux-cored wire prepared in this example is used for underwater cutting of Q235A steel plate with a thickness of 20mm, and the cutting speed is 210mm / min. There was no bridging or slag hanging.
Embodiment 3
[0048] The composition of the drug core according to the mass percentage is: 5% sodium bicarbonate, 13% dolomite, 15% aluminum powder, 0.5% cerium oxide, and 66.5% potassium perchlorate.
[0049] A H08A steel strip with a thickness of 0.5 mm was selected and prepared according to the preparation method in Example 1 to obtain a 2.2 mm diameter cored wire.
[0050] The flux-cored wire prepared in this example was cut underwater on a Q235A steel plate with a thickness of 20mm under the conditions of a cutting voltage of 35-40V and a cutting current of 300-400A, and a cutting speed of 220mm / min. There was no bridging or slag hanging.
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Abstract
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