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Laser Welding Method of Refractory Metal Alloy Thin Plate

A refractory metal and laser welding technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of easy oxidation of molten metal, achieve the effect of solving deformation and warping, easy operation, and meeting product design requirements

Pending Publication Date: 2016-11-02
XIAN WENLI ELECTRONICS TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, joining refractory metals by laser welding is prone to oxidation, so this needs to be studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] (1) Two niobium alloy thin plates to be welded with a thickness of 1mm, the size of which is 600cm in length and width, are polished with 500# sandpaper to ensure that the roughness of the welded surface is Ra≤1.0μm, and treated with acetone or gasoline The surface of the workpiece to be welded is treated with oil and impurities, and the oxide film on the surface of the workpiece to be welded is removed with a wire brush;

[0014] (2) The workpiece to be welded is clamped and fixed with a fixture, and the gap between the two workpieces to be welded is 0.3mm;

[0015] (3) Use fast axial flow CO 2 The laser is used for welding, the two welded parts are clamped and fixed by the fixture, the two welding surfaces are aligned, and the laser focus is in the middle during laser welding. The welding gap between the two welded parts is 0.2mm, the power is 3.0KW, the welding speed is 0.6m / min, the focal length is 120mm, and the defocus amount is +0.2mm. Protected by an inert gas...

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Abstract

The laser welding method for a refractory metal alloy thin plate comprises the following steps: (1) removing oil stains, impurities and oxide films on the surface of workpieces to be welded by mechanical and chemical methods; (2) grinding the edges of workpieces to be welded with sandpaper, and using The fixture is clamped and fixed; (3) welding is performed with a fast axial flow CO2 laser, and the front and back of the weld are protected by an effective inert gas through the fixture and the laser welding head with a gas shield; (4) the weld is closed after cooling Inert gas, remove the welding fixture, and take out the workpiece to be welded. The laser welding method of the refractory metal alloy thin plate provided by the invention is easy to operate, is suitable for the refractory alloy thin plate with a plate thickness of 0.3-5 mm, and realizes the welding and forming of the refractory alloy thin plate.

Description

technical field [0001] The invention relates to laser welding technology, in particular to a laser welding method for refractory metal alloy thin plates. Background technique [0002] So-called refractory metals (melting point higher than 1650° C.), have high melting point, high strength, and good plasticity and have excellent mechanical stability. A series of alloys with high temperature resistance, corrosion resistance and wear resistance can be prepared from refractory metals and other metals. However, due to the high melting point of refractory metals, high energy density welding methods must be used to ensure sufficient penetration and metallurgical bonding. However, due to the poor high-temperature oxidation resistance of refractory metals, welding must be performed in a strict oxygen-free atmosphere to prevent the oxidation of rhenium welds and heat-affected zones, thereby avoiding the increase in hardness and embrittlement of welds. [0003] At present, the general...

Claims

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Application Information

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IPC IPC(8): B23K26/12B23K26/32B23K26/60
Inventor 刘嘉峰
Owner XIAN WENLI ELECTRONICS TECH CO LTD
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