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Novel aluminum alloy welding wire and application thereof

An aluminum alloy welding wire and a new type of technology, applied in welding media, welding equipment, metal processing equipment, etc., can solve the problems that restrict the lightweight development of rail trains, are not conducive to reducing the manufacturing cost of aluminum alloy car bodies, and are not conducive to vehicle lightweighting and transportation. Industry development and other issues, to achieve the effect of significant grain refinement, avoid grain coarsening, and uniform internal structure

Active Publication Date: 2013-09-11
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation is not conducive to the development of lightweight vehicles and the transportation industry in China; it is not conducive to reducing the manufacturing cost of aluminum alloy car bodies; it restricts the development of lightweight rail trains in my country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The aluminum alloy welding wire is prepared according to a specific process, and its chemical composition in terms of mass percentage is: magnesium Mg: 6.25, manganese Mn: 0.88, titanium Ti: 0.28, zinc Zn: 0.11, chromium Cr: 0.14, zirconium Zr: 0.26, iron Fe : 0.105, silicon Si: 0.134, copper Cu: 0.007, beryllium Be: 0.0004, other single impurity elements: ≤0.1, other impurity elements total: ≤0.15, and the balance is aluminum Al. The hydrogen content of the aluminum alloy welding wire is 0.028ml / 100g.

[0020] The aluminum alloy welding wire of this embodiment has a tensile strength of 482 MPa and an elongation of 17%.

Embodiment 2

[0022] The aluminum alloy welding wire is prepared according to a specific process, and its chemical composition in terms of mass percentage is: magnesium Mg: 6.51, manganese Mn: 0.79, titanium Ti: 0.31, zinc Zn: 0.16, chromium Cr: 0.12, zirconium Zr: 0.27, iron Fe : 0.112, silicon Si: 0.136, copper Cu: 0.007, beryllium Be: 0.0003, other single impurity elements: ≤0.1, other impurity elements total: ≤0.15, and the balance is aluminum Al. The hydrogen content of the aluminum alloy welding wire is 0.028ml / 100g.

[0023] The aluminum alloy welding wire of this embodiment has a tensile strength of 485 MPa and an elongation of 16%.

experiment example 1

[0025] The aluminum alloy welding wire and ER5356 welding wire obtained in Example 1 and Example 2 were respectively used as filler materials, and at room temperature, a 10mm thick 5083 O state plate was welded by MIG welding. The performance of the welded joint is shown in Table 1 below:

[0026] Selection of welding wire Joint Tensile Strength Joint backbend test joint strength factor Embodiment 1 of the present invention 305 no cracking 0.91 Embodiment 2 of the present invention 309 no cracking 0.92 ER5356 270 no cracking 0.8

[0027] It can be seen from the above example that the mechanical properties of the weld joint of the aluminum alloy welding wire of the present invention are obviously better than that of the ER5356 welding wire.

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Abstract

The invention relates to the field of welding materials, in particular to a novel aluminum alloy welding wire and application thereof. The novel aluminum alloy welding wire comprises, by mass percent, 5.50-7.0% of Mg, 0.80-1.0% of Mn, 0.25-0.35% of Ti, 0.05-0.20% of Zn, 0.10-0.20% of Cr, 0.25-0.35% of Zr, not more than 0.2% of Fe, not more than 0.2% of Si, not more than 0.05% of Cu, not more than 0.0005% of Be, not more than 0.1% of other single impurity element, not more than 0.15% of total other impurity elements, and the balance of Al. The hydrogen content of the aluminum alloy welding wire is not more than 0.03ml / 100g. The novel aluminum alloy welding wire is low in hydrogen, fine-grain, and even in internal structure. Product detecting and welding experiments show that welding seams are high in strength, high in plasticity, fine in solidification metal grains, low in thermal crack tendency, and good in corrosion resistance. The aluminum alloy welding wire is suitable for aluminum alloy section bar welding of various vehicles, aircrafts, and ships.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a novel aluminum alloy welding wire and its application. Background technique [0002] With the continuous speeding up of my country's railways, it is imperative to improve the structure of the train body. It is the best way to replace the original steel carriages with aluminum alloy car bodies. 6XXX and 7XXX aluminum alloys are mostly used in rail vehicle aluminum alloy bodies, which belong to Al-Mg-Si and Al-Zn-Mg alloys respectively. When selecting welding materials, factors such as mechanical properties, corrosion resistance and crack resistance required by the weld should be considered. Most of the selected welding wires are 5XXX aluminum alloys. Generally, ER5183 and ER5356 welding wires are used for welding. The welding joint strength of ER5356 welding wire is slightly worse than that of ER5183 welding wire, but its joint elongation is better than that of the latter. The...

Claims

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Application Information

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IPC IPC(8): B23K35/28
Inventor 王伟翟玉春顾惠敏顾江龙
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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