Efficient low heat input and double-wire surfacing method
A low-heat, high-efficiency technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of large welding heat input, reduced performance of welded joints, large deformation of base metal, etc., and achieve small welding heat affected zone and electric energy utilization The effect of high rate and fast solidification of weld seam
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[0020] Example 1: Spread the flux on the base material to be welded, use a welding gun that contains two welding wires and the two welding wires have an angle of 30°, and the two welding wires are connected to the positive and negative electrodes of the power supply, and the welding wire is sent to the welding Position, arc starting, the end of the welding wire starts arc under the flux and burns steadily, and welding is performed. The welding power source adopts DC power supply, using H08A welding wire, welding current 200A, double wire diameter 1.2mm, and welding flux when HJ431 is selected. The seam surface is smooth and beautiful, the cladding efficiency is twice that of traditional submerged arc welding under the same welding current, and the deformation of the base material is small.
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[0021] Example 2: Spread the flux on the base material to be welded, use a welding gun containing two welding wires and the two welding wires are at an angle of 25°, and the two welding wires are connected to the positive and negative electrodes of the power supply, and the welding wire is sent to the welding Position, start the arc, the end of the welding wire starts arc under the flux and burns steadily for welding. The welding power source adopts DC power supply. Stainless steel is deposited on the ordinary Q345 steel plate. The H0Cr21Ni10 welding wire is used. The welding current is 140A, the double wire diameter is 1.2mm, and the flux is When HJ260 is selected, a smooth and beautiful weld surface can be obtained, the deformation of the base material is small, and the flat base material does not need to be corrected after surfacing. The intergranular corrosion test of the surfacing layer can fully meet the requirements of use.
Example Embodiment
[0022] Example 3: Spread the flux on the base material to be welded, use a welding gun containing two welding wires and the two welding wires are at an angle of 30°. The two welding wires are connected to the positive and negative electrodes of the power supply, and the welding wire is sent to the welding Position, arc ignition, arc starting at the end of the welding wire and stable combustion, surface surfacing welding, welding power supply adopts DC power supply, wear-resistant surfacing welding on ordinary Q345 steel plate, HS114 cobalt-based surfacing wear-resistant welding wire, welding current 260A , When the double wire diameter is 2.0mm and the flux is selected as HJ107, a surfacing layer with a hardness greater than HRC55 can be obtained, the deformation of the base material is small, and the flat base material does not need to be corrected after surfacing.
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