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

A kind of welding wire for high-strength 7xxx aluminum alloy and preparation method thereof

An aluminum alloy and welding wire technology, applied in the field of aluminum alloy welding wire, can solve the problems of easy volatilization, high melting point oxide film, poor welding quality, etc., and achieve the effects of being beneficial to large-scale industrial production, simple preparation process and low processing cost

Active Publication Date: 2021-04-20
SHANGHAI JIAO TONG UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The poor welding quality and poor welding performance between 7xxx series aluminum alloys have always been a problem for welding personnel
Generally speaking, the welding of aluminum alloys generally has the following difficulties: 1) Aluminum alloys have high thermal conductivity and require higher heat dissipation during welding; 2) Aluminum has a high affinity for oxygen and is easy to form an oxide film with a higher melting point; 3) The linear expansion coefficient of aluminum alloys is large, and welding deformation is prone to occur; 4) The melting points of Zn and Mg elements in 7xxx series aluminum alloys are low, and they are prone to volatilization; Aging and grain coarsening, performance degradation
Under the joint action of many influencing factors, it is quite difficult to weld between 7xxx series aluminum alloys
[0003] With the continuous development of welding technology, various new welding technologies (TIG welding, MIG welding, friction stir welding, etc.) There are still many limitations

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A welding wire for high-strength 7xxx aluminum alloys containing TiB 2 Granular 7xxx series aluminum alloys, the weight percentage of which contains the following elements: 6.9% Zn, 2.75% Mg, 2.0% Cu, 0.1wt.% Si, Fe<0.05wt.%, 2.77wt.% Ti, 1.23wt.% B , the balance being Al.

[0028] The preparation method for the welding wire of high-strength 7xxx aluminum alloy of embodiment 1 comprises the steps:

[0029] S1: Add pure aluminum into the crucible, heat up and melt, add JZF-03 type covering agent, heat up to 750°C for melting after covering evenly, then mix evenly and dry KBF with a mass ratio of 2:1 4 and K 2 TiF 6 Add salt to the melt, and mechanically stir to fully react for 20 minutes, then add Cu particles, Al-Si alloy (10wt.% Si), Mg particles and Zn particles in sequence, and add JZJ type refining agent, degassing and refining at 750 ° C for 20 minutes, Then remove the reaction by-products, let it stand and cool to form an ingot;

[0030] S2: Remove the skin o...

Embodiment 2

[0033] A welding wire for high-strength 7xxx aluminum alloys containing TiB 2The 7xxx series aluminum alloy of the particles contains the following elements in weight percentage: 10% Zn, 2.75% Mg, 2.0wt.% Cu, 0.1wt.% Si, Fe<0.05wt.%, 2.77wt.% Ti, 1.23wt. %B, the balance is Al.

[0034] The preparation method for the welding wire of high-strength 7xxx aluminum alloy of embodiment 2 comprises the steps:

[0035] S1: Add pure aluminum into the crucible, heat up and melt, add JZF-03 type covering agent, heat up to 750°C for melting after covering evenly, then mix evenly and dry KBF with a mass ratio of 2:1 4 and K 2 TiF 6 Add salt to the melt, and mechanically stir to fully react for 20 minutes, then add Cu particles, Al-Si alloy (10wt.% Si), Mg particles and Zn particles in sequence, and add JZJ type refining agent, degassing and refining at 750 ° C for 20 minutes, Then remove the reaction by-products, let it stand and cool to form an ingot;

[0036] S2: Remove the skin of t...

Embodiment 3

[0039] A welding wire for high-strength 7xxx aluminum alloys containing TiB 2 Granular 7xxx series aluminum alloys, the weight percent of which contains the following elements: 10wt.% Zn, 2.75wt.% Mg, 2.0wt.% Cu, 0.1wt.% Si, Fe<0.05wt.%, 5.54wt.% Ti, 2.46wt.% B, the balance is Al.

[0040] The preparation method for the welding wire of high-strength 7xxx aluminum alloy of embodiment 3 comprises the steps:

[0041] S1: Add pure aluminum into the crucible, heat up and melt, add JZF-03 type covering agent, heat up to 750°C for melting after covering evenly, then mix evenly and dry KBF with a mass ratio of 2:1 4 and K 2 TiF 6 Add salt to the melt, and mechanically stir to fully react for 20 minutes, then add Cu particles, Al-Si alloy (10wt.% Si), Mg particles and Zn particles in sequence, and add JZJ type refining agent, degassing and refining at 750 ° C for 20 minutes, Then remove the reaction by-products, let it stand and cool to form an ingot;

[0042] S2: Remove the skin ...

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

No PUM Login to View More

Abstract

The invention discloses a welding wire for high-strength 7xxx aluminum alloy and a preparation method thereof. The welding wire contains TiB 2 Granular 7xxx series aluminum alloys, the weight percentage of which contains the following elements: 6.7-12wt.% Zn, 2.0-2.75wt.% Mg, 2.0-2.5wt.% Cu, 0.05wt.%-0.1wt.% Si, Fe< 0.05wt.%, 0.14‑6.89wt.%Ti, 0.06‑3.11wt.%B, the balance being Al.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy welding wire, in particular to a welding wire for high-strength 7xxx aluminum alloy and a preparation method thereof. Background technique [0002] Due to its high specific strength, 7xxx series aluminum alloys are widely used in the fields of aerospace, military and national defense, rail transportation and ships. The development of modern industry puts forward the requirement of lightweight for material selection and structural design, which requires the transformation of riveted structural parts to welded structural parts. The poor welding quality and poor welding performance between 7xxx aluminum alloys have always been a problem for welding personnel. Generally speaking, the welding of aluminum alloys generally has the following difficulties: 1) Aluminum alloys have high thermal conductivity and require higher heat dissipation during welding; 2) Aluminum has a high affinity for oxygen...

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 Patents(China)
IPC IPC(8): B23K35/28B23K35/40C22C21/10C22C1/03C22C1/06C22F1/053
CPCB23K35/288B23K35/40C22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 王浩伟陈哲朱浩飞陈东李险峰吴一汪明亮刘钧李宇罡
Owner SHANGHAI JIAO TONG UNIV
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