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Laser welding method of rhenium alloy thin sheet

A technology of laser welding and rhenium alloy, which is applied in the direction of laser welding equipment, welding equipment, welding/welding/cutting items, etc., to achieve the effect of preventing oxidation, easy operation and optimizing welding parameters

Active Publication Date: 2010-09-01
SICHUAN FUTURE AEROSPACE IND LLC
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a laser welding method for rhenium alloy sheet to solve the technical problem of rhenium alloy welding. The rhenium alloy described in the present invention Thin plate refers to rhenium-molybdenum or rhenium-tungsten alloy thin plate with a thickness of 0.5-4mm. The specific technical scheme is as follows

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  • Laser welding method of rhenium alloy thin sheet
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  • Laser welding method of rhenium alloy thin sheet

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[0025] figure 1 Shown is the flowchart of the rhenium alloy sheet laser welding method provided by the present invention, which includes the following steps:

[0026] (1) Pre-welding treatment Remove the oil stains and surface oxides on the welding parts.

[0027] (1-1) grinding the welded edge of the rhenium alloy thin plate to be welded with sandpaper;

[0028] (1-2) Chemical cleaning to remove surface grease and oxides at room temperature, in KOH, K 4 [Fe(CN) 6 ] solution for 5 to 10 minutes, then washed with distilled water and dried;

[0029] (2) Laser welding Inert gas shielded laser welding is used, and the front and back of the weld are protected by inert gas to prevent oxidation.

[0030] (2-1) Assembly The workpiece 3 to be welded is clamped and fixed by the fixture 2 (such as figure 2 As shown), the gap between the two workpieces to be welded is less than 0.25mm;

[0031] (2-2) Cross-flow CO for welding 2 Laser welding, power 2.5 ~ 3.0KW, welding speed 0.5 ~...

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Abstract

The invention relates to a special metal welding method, in particular to a laser welding method of a rhenium alloy thin sheet, which comprises the following steps: (1) treatment before welding: cleaning oil stains and surface oxides at the welding part; (2) laser welding: adopting inert gas for protecting laser welding, using the inert gas for protecting the front surfaces and the back surfaces of weld seams and further preventing oxidation; and (3) cooling: closing the inert gas after cooling the weld seams, detaching a welding clamp and taking out a welded workpiece. Compared with the vacuum electron beam welding, the volume of the welded workpiece is not limited, and the operation is simple, thereby being applicable to the rhenium alloy thin sheet with the sheet thickness of 0.5-4mm, optimizing the welding parameters, realizing the one-sided welding with back formation of the rhenium alloy thin sheet, eliminating the welding defects of air holes and the like and leading the weld seam quality to achieve the I-level weld seam standard.

Description

technical field [0001] The invention relates to a special metal welding method, in particular to a rhenium alloy sheet laser welding method. Background technique [0002] Rhenium is a rare refractory metal with high melting point (its melting point is as high as 3180°C, second only to tungsten’s melting point of 3410°C), high strength, good plasticity and excellent mechanical stability. Rhenium has no brittle critical transition temperature at high temperature It has good creep resistance under rapid cooling and rapid heating conditions. A series of alloys with high temperature resistance, corrosion resistance and wear resistance can be prepared from rhenium and other metals. For example, Re25-W was once the nuclear reactor material of the space station, and later developed into Re30-W-Mo30 alloy with better performance; Re-Pt is used As a structural material for atomic energy reactors, it can resist the corrosion of heating elements under high temperature at 1000°C, and ca...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K26/12B23K26/42B23K101/18B23K26/21B23K26/60
Inventor 胡鑫王振强黄克忠李峰李鹏
Owner SICHUAN FUTURE AEROSPACE IND LLC
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