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Metal granular reinforced aluminum flux cored wire

A technology of flux-cored aluminum welding wire and metal particles, applied in metal processing equipment, welding medium, welding equipment, etc., can solve the problems of welding wire becoming brittle, low weld strength, segregation, etc., to reduce the ductile-brittle transition temperature and improve the low temperature Impact toughness and crack resistance, the effect of increasing weld strength

Active Publication Date: 2015-03-04
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when welding some high-strength aluminum alloys (such as 6063) with aluminum-silicon welding wire, the weld strength is lower than that of the base metal
If Ni and Cu elements are added to the welding wire, although the strength of the weld can be improved, the addition of nickel to aluminum is prone to segregation, and the addition of copper will make the welding wire brittle

Method used

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  • Metal granular reinforced aluminum flux cored wire

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Experimental program
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Effect test

Embodiment 1

[0013] In the metal particle reinforced flux-cored aluminum welding wire of the present invention, the sheath 1 is an Al-9Si alloy, wherein the mass percentage of rare earth elements is 0.6%, and the flux core 2 accounts for 25% of the total mass of the aluminum welding wire.

[0014] Drug core 2 is made of raw materials potassium fluoroaluminate, K 3 BF 6 、K 2 SiF 6 , Cu-20Ni alloy, Al-22Si alloy, and Cu-20Si alloy are prepared according to the following mass percentage: 8% K 3 BF 6 , 10%K 2 SiF 6 , 2% Cu-20Ni alloy, 25% Al-22Si alloy, 20% Cu-20Si, and the balance is potassium fluoroaluminate.

[0015] Use a ball mill to grind the above raw materials to a particle size of 200 mesh powder and mix them evenly, sinter them in a vacuum furnace to form a sintered flux, and then use the vibration method to put the flux into an Al-9Si alloy tube with an outer diameter of 12mm and an inner diameter of 6mm, and roll it , rough drawing, annealing, fine drawing, layer winding and...

Embodiment 2

[0018] In the metal particle reinforced flux-cored aluminum welding wire of the present invention, the sheath 1 is an Al-9.5Si alloy, wherein the mass percentage of rare earth elements is 0.4%, and the flux core 2 accounts for 30% of the total mass of the aluminum welding wire.

[0019] Drug core 2 is made of raw materials potassium fluoroaluminate, K 3 BF 6 、K 2 SiF 6 , Cu-10Ni alloy, Al-20Si alloy, and Cu-40Si alloy are formulated according to the following mass percentages: 15% K 3 BF 6 , 17%K 2 SiF 6 , 6% Cu-10Ni alloy, 10% Al-20Si alloy, 7% Cu-40Si alloy, and the balance is potassium fluoroaluminate.

[0020] The manufacturing method of welding wire is the same as embodiment 1.

[0021] The flux-cored aluminum wire and common Al-12Si / potassium fluoroaluminate flux-cored wire were used to conduct a brazing comparison test on 6063 aluminum alloy. The result shows: weld component analysis shows that Si content in the weld seam of flux-cored welding wire of the presen...

Embodiment 3

[0023] In the metal particle reinforced flux-cored aluminum welding wire of the present invention, the sheath 1 is an Al-9Si alloy, wherein the mass percentage of rare earth elements is 0.6%, and the flux core 2 accounts for 25% of the total mass of the aluminum welding wire.

[0024] Drug core 2 is made of raw materials potassium fluoroaluminate, K 3 BF 6 、K 2 SiF 6 , Cu-2Ni alloy, and Al-22Si alloy are formulated according to the following mass percentages: 5% K 3 BF 6 , 35%K 2 SiF 6 , 10% Cu-2Ni alloy, 20% Al-22Si alloy, and the balance is potassium fluoroaluminate.

[0025] The manufacturing method of welding wire is the same as embodiment 1.

[0026] The advantage of welding wire of the present invention is the same as embodiment 1.

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Abstract

The invention discloses a metal granular reinforced aluminum flux cored wire. The metal granular reinforced aluminum flux cored wire comprises an outer silicon-aluminum alloy skin and a flux core filled in the skin, wherein the flux core is prepared by the following raw materials in percentage by mass: 5 to 20% of K3BF6, 0 to 35% of K2SiF6, 0 to 20% of K2GeF6, 0.8 to 20% of Cu-Ni alloy, 0 to 40% of Al-Si alloy, 0 to 30% of Cu-Si alloy, 0 to 5% of Al-Cu alloy and the balance of potassium fluoroaluminate. The metal granular reinforced flux core flux cored wire has the advantages that elements Ni, Si, Cu and B are added to the flux core in the form of intermediate alloy, so that the high processing performance is ensured, the wire is high in wettability and mobility, the low-temperature impact toughness and cracking resistance of a weld joint are improved, the ductile-brittle transition temperature is reduced, and the strength of the weld joint is improved.

Description

technical field [0001] The invention relates to a flux-cored welding wire, in particular to a metal particle-reinforced flux-cored aluminum welding wire. Background technique [0002] Aluminum-silicon alloy has excellent weldability, wettability, color consistency with base metal, coating, joint strength and corrosion resistance. It is an excellent welding material commonly used for argon arc welding and brazing aluminum alloys. At present, the proportion of flux-cored welding wire in argon arc welding and brazing welding materials is increasing. However, the existing aluminum-silicon alloys are difficult to process when the silicon content is large, and are easy to break during drawing, so it is difficult to process them into flux-cored welding wires. According to experience, when the silicon content exceeds 10.5%, it is already difficult to process. When the silicon content is 11%, the welding wire can generally only be processed to Φ2mm, and it is difficult to make a thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/28
Inventor 龙伟民吕登峰张青科马佳鲍丽沈元勋马力黄俊兰薛行雁钟素娟朱坤
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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