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Laser auxiliary consumable electrode arc additive connecting method for high-temperature alloy

A high-temperature alloy, laser-assisted technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., to achieve the effect of improving the internal quality of the weld, fine grain size, and narrow heat-affected zone

Active Publication Date: 2017-06-20
济南英维新材料科技合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the added material is welding wire, using the coupling effect of laser photoplasma and melting electrode arc to achieve stable droplet transfer under low current, and combining with additive manufacturing technology for superalloy connection has not yet been seen. It is reported that due to the use of welding wire, the added ingredients are stable, the cost is low, and the working environment is improved

Method used

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  • Laser auxiliary consumable electrode arc additive connecting method for high-temperature alloy
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this implementation, the fiber laser assisted melting electrode arc additive connection method is used to weld Inconel625 alloy with a thickness of 8mm, and the diameter of the welding wire used is 0.6mm. The specific implementation method is as follows:

[0024] Step 1. Before welding, use an edge planer to process the high-temperature alloy to be connected into an X-shaped groove, the groove angle is 90°, and the blunt edge is 0.6mm, and then the distance from both ends of the groove is polished within 20cm. Metallic luster, and finally clean the processed and polished parts with acetone, and fix the cleaned workpiece with welding fixture;

[0025] Step 2. Place the welding torch and the laser head in the same plane, the laser head is vertically downward, the angle between the welding torch and the workpiece is 35°, and the laser head forms a paraxial compound, and the distance between the intersection of the welding wire and the workpiece and the laser action point 0.6...

Embodiment 2

[0030] In this implementation, the YAG solid-state laser assisted melting electrode arc additive connection method is used to weld Inconel718 alloy with a plate thickness of 12mm. The diameter of the welding wire used is 0.8mm. The specific implementation method is as follows:

[0031] Step 1. Before welding, use an edge planer to process the high-temperature alloy to be connected into an X-shaped groove, the groove angle is 120°, the blunt edge is 1.0mm, and then the distance from both ends of the groove is polished within 20cm. Metallic luster, and finally clean the processed and polished parts with acetone, and fix the cleaned workpiece with welding fixture;

[0032] Step 2: Place the welding torch and the laser head in the same plane, the laser head is vertically downward, the angle between the welding torch and the workpiece is 45°, and the laser head forms a paraxial composite, and the distance between the intersection of the welding wire and the workpiece and the laser action...

Embodiment 3

[0037] In this implementation, a fiber laser assisted melting electrode arc additive connection method is used to weld GH4738 alloy with a plate thickness of 16mm. The diameter of the welding wire used is 1.0mm. The specific implementation method is as follows:

[0038] Step 1. Before welding, use an edge planer to process the high-temperature alloy to be connected into an X-shaped groove, the groove angle is 150°, the blunt edge is 1.4mm, and then the distance from both ends of the groove is polished within 20cm. Metallic luster, and finally clean the processed and polished parts with acetone, and fix the cleaned workpiece with welding fixture;

[0039] Step 2. Place the welding torch and the laser head in the same plane, the laser head is vertically downward, the angle between the welding torch and the workpiece is 55°, and the laser head forms a paraxial composite, and the distance between the intersection of the welding wire and the workpiece and the laser action point 1.2mm;

...

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Abstract

The invention discloses a laser auxiliary consumable electrode arc additive connecting method for a high-temperature alloy, and belongs to the technical field of welding. According to the method, the laser arc composite welding technology and the additive manufacturing technology are combined, through the coupling function of laser photoinduced plasmas and consumable electrode arcs, stable globular transfer under small current is achieved, layer-by-layer accumulation of micro weld passes is achieved through accurate control over the width and depth of each welding line, a welding connector is formed, the heat input of each welding line is smaller, the welding heat affected zone is narrower, the high-temperature staying time of a melting pool is short, and the solidification speed is increased; the obtained melting pool is narrowed and becomes shallow, chemical components and structures are more uniform, and air holes, cracks and other defects are easier to control; and grain is finer, welding stress and residual deformation are small, the comprehensive performance of a high-temperature alloy welding connector is obviously improved, the component service life is prolonged, and high cost performance is achieved.

Description

Technical field [0001] The invention relates to a laser-assisted melting electrode arc additive connection method for high-temperature alloys, and belongs to the technical field of welding. Background technique [0002] High-temperature alloys are currently irreplaceable key structural materials for high-temperature components such as aero engines and gas turbines. Welding is an indispensable connection method for the manufacture of high-temperature alloy structural parts. High-temperature alloys have long-term operation under high temperature, high pressure, high speed rotation and various oxidative corrosion environments. The service conditions are harsh, the performance requirements of the welded joints are high, and the welding is difficult. At present, the commonly used welding methods are argon tungsten arc welding, electron beam welding, brazing, friction welding, etc. The main problems are the crack sensitivity of superalloys, the growth of grains in the superheated zone,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/60B23K26/70
CPCB23K26/348B23K26/60B23K26/70
Inventor 胡连海赵阳许昌玲丁敏刘晓林侯德斌刘春涛胡庆福孙继友
Owner 济南英维新材料科技合伙企业(有限合伙)
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