Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Homogenized Al-Mg series aluminum alloy weld microstructure laser welding method

A laser welding and aluminum alloy technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of inability to achieve heat treatment process for large structural parts, long post-heat treatment time, large energy loss, etc., to improve the welding seam. Mechanical properties, low cost, energy saving effect

Inactive Publication Date: 2019-08-23
HUST WUXI RES INST
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Post-weld heat treatment usually takes a long time, generally more than 10~15 hours, and the efficiency is low
Moreover, the heat treatment temperature of Al-Mg aluminum alloy is generally about 460°C, maintaining high temperature requires a lot of energy loss and increases the cost
At the same time, due to the limitation of the size of the heat treatment device, the heat treatment process cannot be realized for large structural parts

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Homogenized Al-Mg series aluminum alloy weld microstructure laser welding method
  • Homogenized Al-Mg series aluminum alloy weld microstructure laser welding method
  • Homogenized Al-Mg series aluminum alloy weld microstructure laser welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0047] The 5083 aluminum alloy is welded to the butt joint structure.

[0048] Before welding, mechanically grind the central area of ​​the weld to remove scale, and wipe off oil and other impurities with acetone; during welding, the track of the light spot is a square wave path, such as figure 2 As shown, the swing amplitude H is 2 mm, the swing frequency is 300 Hz, and other welding process parameters are the same as conventional laser welding process parameters.

[0049] The results show that the distribution of magnesium in the weld seam of 5083 aluminum alloy under the conventional laser welding process is extremely uneven, mainly including the β phase of magnesium ( Mg 2 Al 3 ) aggregates and precipitates in the weld, which is more inhomogeneous than the skeletal β phase of the base metal. In the weld seam welded by laser swing welding, the distribution of magnesium element is relatively uniform, close to the base metal, and mainly contains the β phase of magnesium el...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a homogenized Al-Mg series aluminum alloy weld microstructure laser welding method. The homogenized Al-Mg series aluminum alloy weld microstructure laser welding method comprises the following steps that (1), pre-welding polishing is carried out, wherein a weld center area is firstly mechanically ground, oxide skin on the weld surface is taken out, and acetone is used for wiping oil stains or other impurities; (2), pre-welding parameter adjustment is carried out, wherein a laser head of a laser device is aligned to the place, needing to be welded, of a workpiece, and theheight is adjusted; and (3), waveform welding is carried out, wherein the position needing to be welded is welded, protective gas is used for protection, laser beams advance in the weld direction inparallel, in the advancing process, a galvanometer is used for making the oscillating laser beams symmetrically move back and forth on the two sides in the welding direction, and the light spot motiontrajectory is a square wave path. In the welding process, oscillating of the laser beams can agitate a molten pool and delay solidification in the molten pool, Mg elements in the weld are uniformly distributed, the beta phase (Mg2Al3) is uniformly precipitated, the weld microstructure homogenization is achieved, and the weld mechanical properties are improved.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a laser welding method for homogenizing the welding seam structure of an Al-Mg series aluminum alloy. Background technique [0002] Al-Mg series aluminum alloy has the characteristics of high specific strength, good plasticity, corrosion resistance and excellent processing performance, and is widely used in molds, ship plates, ship shells, fuel storage tanks and other structures. This type of aluminum alloy is mainly solid solution strengthened by Mg atoms and work hardened. [0003] Laser welding has the advantages of high energy density, small heat input, large penetration with the same heat input, small heat-affected zone, small welding deformation, fast welding speed, and convenient automatic welding. It is increasingly used in the welding field. However, during the welding process of aluminum alloy, due to the characteristics of high heat transfer coefficient of aluminum all...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/24
CPCB23K26/21B23K26/24
Inventor 王春明李尚仁安升辉
Owner HUST WUXI RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com