Activator and application of improving depth of fusion of aluminum alloy CMT welding head

An active agent, titanium dioxide technology, applied in welding equipment, metal processing equipment, auxiliary devices, etc., can solve the problems of only welding thin plates, limited application range, low heat input, etc.

Inactive Publication Date: 2019-01-01
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

Due to the low heat input in the CMT welding process, the penetration depth of the CMT weld

Method used

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  • Activator and application of improving depth of fusion of aluminum alloy CMT welding head
  • Activator and application of improving depth of fusion of aluminum alloy CMT welding head
  • Activator and application of improving depth of fusion of aluminum alloy CMT welding head

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Embodiment Construction

[0010] Further illustrate technical scheme of the present invention below in conjunction with specific embodiment:

[0011] figure 1 Aluminum panels coated with active agent and uncoated with active agent. The active ingredient used is SiO 2 、TiO 2 and Cr 2 o 3 , mass ratio SiO 2 : TiO 2 : Cr 2 o 3 =2:1:1.

[0012] The test base material involved in the present invention is aluminum alloy 6061, the specification of the test piece is 300×150×4mm, and the welding wire is ER4043. A plate surfacing test was carried out on an aluminum alloy with a plate thickness of 4 mm using DC cold metal transfer technology CMT. The CMT welder used for the test is the CMT Advanced 4000 welder from Fronius.

[0013] Its main implementation steps are as follows:

[0014] 1. Before the surfacing test, use a wire brush to remove the oxide film on the aluminum plate until the metallic luster is exposed, and use alcohol to clean the oil and dirt on the surface of the welding place within a...

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Abstract

The invention discloses an activator and an application of improving the depth of fusion of an aluminum alloy CMT welding head. The activator consists of SiO2, TiO2 and Cr2O3; and a layer of activatorcan be applied on an aluminum plate before aluminum alloy CMT is welded. When the activator is not applied on the surface of a welding line, liquid metal in the center of a molten pool flows from thebottom of the molten pool to the surface of the molten pool; and when the activator is applied on the surface of the welding line, the flow direction of the liquid metal is changed, the liquid metalflows from the surface of the molten pool to the bottom of the molten pool, and therefore, arc contraction can be caused, electromagnetic force can be increased, the surface tension gradient of the molten pool can be changed from a negative value to a positive value, so that the depth of fusion can be increased.

Description

technical field [0001] The invention belongs to the field of welding technology, and more specifically relates to improving the penetration depth of an aluminum alloy CMT welding joint by using a method of coating an active agent. Background technique [0002] Cold metal transfer technology (Cold Metal Transfer, CMT) is a welding technology with low heat input developed by Austrian company Fronius on the basis of steel and aluminum welding, spatter-free arc ignition technology and micro-joint technology. The innovation of CMT technology lies in the combination of droplet transfer and wire feeding process, which reduces the heat input in the welding process and truly realizes spatter-free welding. Due to the low heat input in the CMT welding process, the penetration depth of the CMT welding head is shallow, and only thin plates can be welded, so the application range is limited. Contents of the invention [0003] The purpose of the present invention is to overcome the defi...

Claims

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Application Information

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IPC IPC(8): B23K3/08
CPCB23K3/082
Inventor 胡绳荪田银宝申俊琦王志江白鹏飞
Owner TIANJIN UNIV
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