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High-performance magnesium-lithium alloy welding wire and preparation method and application thereof

A magnesium-lithium alloy, high-performance technology, applied in the field of high-performance magnesium-lithium alloy welding wire and its preparation, can solve the problems of many pores in the weld seam, large tendency of welding hot cracks, and low welding strength, and achieve stable and continuous welding performance Production, guaranteed excellent results

Active Publication Date: 2018-05-04
LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of many pores in the weld seam, large tendency of welding hot cracks and low welding strength in the welding of magnesium-lithium alloys, the invention provides a high-performance magnesium-lithium alloy welding wire

Method used

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  • High-performance magnesium-lithium alloy welding wire and preparation method and application thereof
  • High-performance magnesium-lithium alloy welding wire and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A high-performance magnesium-lithium alloy welding wire, containing the following components by mass percentage: 87% by mass of Mg, and 0.58% by mass of impurities; the impurities are: 3.0% by mass of Al , the mass percentage of Zn is 0.002%, the mass percentage of Ca is 0.001%, the mass percentage of Cu is 0.001%, the mass percentage of Ag is 0.002%, and the balance is Li.

[0027] The preparation method of this high-performance magnesium-lithium alloy welding wire specifically includes the following steps:

[0028] Step (1): Vacuum melting the above-mentioned specific components at a melting temperature of 700°C, and homogenizing annealing treatment on the melted ingot.

[0029] Step (2): Extrude the smelted ingot into a rod with a diameter of 9.5 mm through a die.

[0030] Step (3): Pass the φ9.5mm magnesium-lithium alloy rod through the water tank wire drawing machine from φ9.5mm-φ7.85mm-φ6.25mm-φ5.5mm-φ4.25mm-φ3.75mm-φ2.35mm-φ1. 98mm is prepared as a wire, and af...

Embodiment 2

[0038] A high-performance magnesium-lithium alloy welding wire, containing the following components by mass percentage: 88% by mass of Mg, and 0.43% by mass of impurities; the impurities are: 4.0% by mass of Al , the mass percentage content of Zn is 0.003%, the mass percentage content of Ca is 0.002%, the mass percentage content of Cu is 0.002%, the mass percentage content of Ag is 0.004%, and the balance is Li.

[0039] The preparation method of this high-performance magnesium-lithium alloy welding wire specifically includes the following steps:

[0040] Step (1): Vacuum melting the above-mentioned specific components at a melting temperature of 720°C, and homogenizing annealing treatment on the melted ingot.

[0041] Step (2): Extrude the smelted ingot into a φ9.5mm rod through a die.

[0042] Step (3): Pass the φ9.5mm magnesium-lithium alloy rod through the water tank wire drawing machine from φ9.5mm-φ7.85mm-φ6.25mm-φ5.5mm-φ4.25mm-φ3.75mm-φ2.35mm-φ1. 98mm is prepared into...

Embodiment 3

[0050] A high-performance magnesium-lithium alloy welding wire, containing the following components by mass percentage: the mass percentage of Mg is 89%, the mass percentage of impurities is 0.63%; the impurities are: the mass percentage of Al is 5.0%, The mass percentage content of Zn is 0.005%, the mass percentage content of Ca is 0.004%, the mass percentage content of Cu is 0.003%, the mass percentage content of Ag is 0.006%, and the balance is Li.

[0051] The preparation method of this high-performance magnesium-lithium alloy welding wire specifically includes the following steps:

[0052] Step (1): Vacuum melting the magnesium-lithium alloy with specific composition.

[0053] Step (2): Extrude the smelted ingot into a φ9.5mm rod through a die.

[0054] Step (3): Pass the φ9.5mm magnesium-lithium alloy rod through the water tank wire drawing machine from φ9.5mm-φ7.85mm-φ6.25mm-φ5.5mm-φ4.25mm-φ3.75mm-φ2.35mm-φ1. 98mm is prepared into wire material, which has been wound t...

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Abstract

The invention discloses a high-performance magnesium-lithium alloy welding wire and a preparation method and application of the high-performance magnesium-lithium alloy welding wire. The welding wireis prepared from, by weight, 86-88% of Mg, 3.0-5.0% of Al, 0.002-0.005% of Zn, 0.001-0.004% of Ca, 0.001-0.003% of Cu, 0.002-0.006% of Ag and the balance Li. The density of the ultralight magnesium-lithium alloy is 1.4-1.62g / cm<3>. The components are subjected to vacuum melting to obtain a casting ingot, the casting ingot is gradually squeezed through a die to be a bar with the diameter Phi being9.5mm, high-speed continuous production is achieved, the wire fracture phenomenon is avoided in the pulling process, the oxide inclusion content is reduced, the strength and plasticity of the alloy are improved, and the requirement for high-speed automatic welding of the welding wire can be met. A direct current argon arc welding machine is adopted for one-face forming welding, a welding connectorformed after the welding wire and base metal are welded is placed into an XL-1 medium-temperature box type resistance furnace for heat preservation for 20h at the temperature of 170 DEG C for artificial aging treatment, and the strength of the welding connector is improved. Compared with the base metal, the tensile strength and the elongation percentage are improved, and welding performance is stable.

Description

technical field [0001] The invention relates to a magnesium-lithium alloy welding wire, in particular to a high-performance magnesium-lithium alloy welding wire and a preparation method and application thereof. Background technique [0002] Magnesium-lithium alloy is the alloy material with the smallest density so far. It has many advantages and has good application prospects in many fields. For magnesium-lithium alloys, the stress state in the process of extrusion and drawing is unfavorable for its plasticity, so magnesium-lithium alloys are difficult to draw and form, and drawn products have dimensional accuracy and surface roughness High, especially wire, pipe drawing is difficult to achieve high-speed, continuous production. Wire breakage often occurs during the drawing process of production welding wire, mainly due to the high content of oxide inclusions, coarse grains, and dendrite segregation problems, which lead to a decrease in the plasticity of the alloy, so the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40B23K9/235B23K9/16
CPCB23K9/16B23K9/235B23K35/284B23K35/40
Inventor 傅开武火照燕王一珠马勤
Owner LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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