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Solders for titanium alloy non-melting electrode argon arc welding

A non-melting electrode and argon arc welding technology, which is applied in the direction of welding medium, welding equipment, metal processing equipment, etc., can solve the problems of joint performance decline, labor loss increase, joint reliability decline, etc., and achieve strong penetration and mechanical properties High, improve the effect of penetration

Inactive Publication Date: 2005-07-20
BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still two problems in the current non-melting electrode argon arc welding process of titanium alloys. The first problem is that for single-pass TIG welding of titanium alloys without grooves, only 3mm thick titanium alloy plates can be welded. For TIG welding of titanium alloys with a thickness of more than 3mm, as the thickness increases, it will lead to a huge increase in labor loss and a decrease in joint reliability; the second problem is that due to the activity of titanium alloys, it is difficult to overcome during the welding process. The problem of weld porosity, which leads to the decline of joint performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 claims CaF 2 80g, BaF 2 3 grams, MgF 2 3 g, AlF 3 14 grams, several components were melted in a crucible, and then poured into a water-cooled container to cool to room temperature. Next, use a universal pulverizer to pulverize the flux to obtain a powder with a particle size of less than 300 meshes, which is the flux. When welding a 3mm titanium alloy, the welding process parameters using this flux are: the welding current is 120 amperes, the welding voltage is 7-8 volts, and the welding speed is 15m / h. The process parameters of TIG welding without flux are: welding current is 200 amps, welding voltage is 10~12 volts, and welding speed is 12m / h. X-ray inspection was carried out after welding, and it was found that the joints welded by flux basically had no pores, while the joints welded by TIG welding had a large number of pores.

Embodiment 2

[0014] Embodiment 2 claims CaF 2 85g, BaF 2 4 g, MgF 2 3 g, AlF 3 5 grams, several components were melted in a crucible, and then poured into a water-cooled container to cool to room temperature. Next, use a universal pulverizer to pulverize the flux to obtain a powder with a particle size of less than 300 meshes, which is the flux. When welding a 3mm titanium alloy, the welding process parameters using this flux are: the welding current is 115 amps, the welding voltage is 7-8 volts, and the welding speed is 15m / h. The process parameters of TIG welding without flux are: welding current is 200 amps, welding voltage is 10~12 volts, and welding speed is 12m / h. X-ray inspection was carried out after welding, and it was found that the joints welded by flux basically had no pores, while the joints welded by TIG welding had a large number of pores.

Embodiment 3

[0015] Embodiment 3 claims CaF 2 83 g, BaF 2 3 grams, MgF 2 4 g, AlF 3 10 grams, several components were melted in a crucible, and then poured into a water-cooled container to cool to room temperature. Next, use a universal pulverizer to pulverize the flux to obtain a powder with a particle size of less than 300 meshes, which is the flux. When welding a 3mm titanium alloy, the welding process parameters using this flux are: the welding current is 100 amperes, the welding voltage is 7-8 volts, and the welding speed is 15m / h. The process parameters of TIG welding without flux are: welding current is 200 amps, welding voltage is 10~12 volts, and welding speed is 12m / h. X-ray inspection was carried out after welding, and it was found that the joints welded by flux had no pores at all, while the joints welded by TIG welding had a large number of pores.

[0016] Due to the use of the flux described in the present invention, the existing welding process becomes simple and overco...

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Abstract

A flux for the argon arc welding of Ti alloy by use of non-consumable electrode contains CaF2 (75-82 wt.%), BaF2 (0-3), MgF2 (5-10) and AlF3 (rest). Its advantages are simple welding technology, less air holes in welded seam, and low cost.

Description

technical field [0001] The invention relates to a flux for non-melting electrode argon arc welding of titanium alloy, which is a mixture composed of metal fluoride. Background technique [0002] Non-melting electrode argon arc welding occupies an important position in the welding industry. It can realize various types of welding joints in different spatial positions, and has the advantages of good protection, stable welding process, wide welding range, flat and smooth joints, and beautiful appearance. A series of advantages can realize mechanization, automation and even artificial intelligence. However, there are still two problems in the current non-melting electrode argon arc welding process of titanium alloys. The first problem is that for single-pass TIG welding of titanium alloys without grooves, only 3mm thick titanium alloy plates can be welded. For TIG welding of titanium alloys with a thickness of more than 3mm, as the thickness increases, it will lead to a huge in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/02B23K35/22B23K35/362
Inventor 李晓红张连锋杜欲晓郭和平郭德伦
Owner BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP