Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of anti-thermal cracking 2xxx series aluminum alloy welding wire and preparation method thereof

A technology of aluminum alloy welding wire and thermal crack resistance, which is applied in the field of aluminum alloy welding wire, can solve the problems of weakening specific strength, increasing quality, and uneven deformation, so as to improve plasticity and crack resistance, reduce grain growth, and improve comprehensive performance effect

Active Publication Date: 2021-06-22
SHANGHAI JIAOTONG UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 2xxx series aluminum alloys are mostly applied by riveting or one-time forming, which increases the quality and weakens the specific strength. Therefore, it is very important to improve the welding strength of 2xxx series aluminum alloys
[0003] The welding performance of 2xxx series aluminum alloys is poor. The main reason is that during the welding process, the microstructure of the welded joint metal is characterized by the distribution of α(Al)-θ(CuAl) at the grain boundary with α(Al) as the matrix. 2 ) eutectic structure, and there are coarse, highly directional columnar crystals formed, compared with equiaxed crystals and columnar crystals, the grain size is different, the deformation is uneven, and thermal cracks are prone to occur, which seriously reduces the mechanical properties of the metal at the weld
[0004] The welding wires currently used in 2xxx aluminum alloys mainly include ER2319 commercial welding wires produced abroad and SAlCu welding wires prepared in accordance with GB / T10858-1989 in China. However, these two welding wires are suitable for welding 2219 and 2519 high-strength aluminum alloys. It can reach 55-60% of the base metal, and the hot cracking phenomenon at the weld is not improved well

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 thermal cracking resistant 2xxx series aluminum alloy welding wire, the aluminum alloy welding wire contains TiB 2 Granular 2xxx series aluminum alloy, its weight percentage contains the following elements: 4.5%Cu, 0.4%Mn, 1.2%Mg, 0.2%Zr, Si<0.1%, Fe<0.1%, 1.4%Ti, 0.6%B, the balance for Al.

[0028] The preparation method of the novel thermal-cracking-resistant 2xxx series aluminum alloy welding wire of embodiment 1 comprises the following steps:

[0029] S1: Add high-purity Al into the crucible, heat up to 750°C to melt, add JZF-03 high-temperature covering agent, cover evenly and then smelt, KBF 4 and K 2 TiF 6 Add evenly mixed salt into the melt at a mass ratio of 1:2, mechanically stir for 30 minutes, and carry out the in-situ synthesis reaction. After the reaction is completed, remove the reaction by-products, then add Cu, Mg, Al-Mn alloys in sequence, and add JZJ type non-alloy Harmful aluminum alloy refining agent is used for degassing and refining, and the...

Embodiment 2

[0034] A thermal cracking resistant 2xxx series aluminum alloy welding wire, the aluminum alloy welding wire contains TiB 2 Granular 2xxx series aluminum alloy, its weight percentage contains the following elements: 6.0%Cu, 0.4%Mn, 1.2%Mg, 0.2%Zr, Si<0.1%, Fe<0.1%, 2.8%Ti, 1.2%B, the balance for Al.

[0035] The preparation method of the novel heat-cracking-resistant 2xxx series aluminum alloy welding wire of embodiment 2 comprises the following steps:

[0036] S1: Add high-purity Al into the crucible, heat up to 750°C to melt, add JZF-03 high-temperature covering agent, cover evenly and then smelt, KBF 4 and K 2 TiF 6 Add evenly mixed salt into the melt at a mass ratio of 1:2, mechanically stir for 30 minutes, and carry out the in-situ synthesis reaction. After the reaction is completed, remove the reaction by-products, then add Cu, Mg, Al-Mn alloys in sequence, and add JZJ type non-alloy Harmful aluminum alloy refining agent is used for degassing and refining, and the te...

Embodiment 3

[0041] A thermal cracking resistant 2xxx series aluminum alloy welding wire, the aluminum alloy welding wire contains TiB 2 Granular 2xxx series aluminum alloy, its weight percentage contains the following elements: 6.5%Cu, 0.4%Mn, 1.2%Mg, 0.2%Zr, Si<0.1%, Fe<0.1%, 5.6%Ti, 2.4%B, the balance for Al.

[0042] The preparation method of the novel heat-cracking-resistant 2xxx series aluminum alloy welding wire of embodiment 3 comprises the following steps:

[0043] S1: Add high-purity Al into the crucible, heat up to 750°C to melt, add JZF-03 high-temperature covering agent, cover evenly and then smelt, KBF 4 and K 2 TiF 6 Add evenly mixed salt into the melt at a mass ratio of 1:2, mechanically stir for 30 minutes, and carry out the in-situ synthesis reaction. After the reaction is completed, remove the reaction by-products, then add Cu, Mg, Al-Mn alloys in sequence, and add JZJ type non-alloy Harmful aluminum alloy refining agent is used for degassing and refining, and the te...

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 heat-cracking-resistant 2xxx series aluminum alloy welding wire and a preparation method thereof. The aluminum alloy welding wire contains TiB 2 Granular 2xxx series aluminum alloys containing the following elements in weight percent: 4.0‑6.0% Cu, 0.2‑0.6% Mn, 0.8‑1.2% Mg, 0.10‑0.30% Zr, Si<0.1%, Fe<0.1%, 0.14‑ 6.89%Ti, 0.06‑3.11%B, the balance is Al.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy welding wire, in particular to a thermal cracking-resistant 2xxx series aluminum alloy welding wire and a preparation method thereof. Background technique [0002] Due to its excellent specific strength and plasticity, the 2xxx series aluminum alloy has a wider application temperature range at high and low temperatures, making it widely used in the aerospace industry. However, 2xxx series aluminum alloys are mostly applied by riveting or one-time forming, which increases the quality and weakens the specific strength. Therefore, it is very important to improve the welding strength of 2xxx series aluminum alloys. [0003] The welding performance of 2xxx series aluminum alloys is poor. The main reason is that during the welding process, the microstructure of the welded joint metal is characterized by the distribution of α(Al)-θ(CuAl) at the grain boundary with α(Al) as the matrix. 2 ) eutecti...

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): B23K35/28B23K35/40C22C1/02C22C1/03C22C1/06C22C21/14C22C21/16
CPCB23K35/286B23K35/40C22C1/026C22C1/03C22C1/06C22C21/14C22C21/16
Inventor 王浩伟陈哲朱浩飞陈东李险峰吴一汪明亮王磊李宇罡
Owner SHANGHAI JIAOTONG UNIV