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Weld joint protection cooling device and method for solving problem that titanium alloy cast ingot is prone to cracking after welding

A cooling device, titanium alloy technology, applied in furnaces, furnace types, heat treatment equipment, etc., can solve problems such as easy cracking of titanium alloy ingots, slow cooling rate, and easy cracking of welds, so as to avoid coarsening of grains, The effect of reducing welding heat input and improving weld strength

Pending Publication Date: 2022-06-28
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a welding seam protection cooling device and a method for solving the problem of easy cracking of titanium alloy ingot after welding, and solve the problems of slow cooling rate after welding, low production efficiency and easy cracking of weld seam during traditional welding of titanium alloy ingot

Method used

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  • Weld joint protection cooling device and method for solving problem that titanium alloy cast ingot is prone to cracking after welding
  • Weld joint protection cooling device and method for solving problem that titanium alloy cast ingot is prone to cracking after welding
  • Weld joint protection cooling device and method for solving problem that titanium alloy cast ingot is prone to cracking after welding

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Embodiment 1

[0044] The above experiments, including the results finally obtained by the experiments, are only embodiments adopted to facilitate the understanding of the technical solutions of the invention, and are not intended to limit the present invention.

[0045]Select 2 TC4 titanium alloy ingots with a diameter of 560mm, adjust the angle between the swaying plasma welding torch and the welding seam to 90°, the "pulse" rotation frequency of the TC4 titanium alloy ingot is 5° / min, and the pause time is 2s. The swinging angle of the swaying plasma welding torch is θ=4°, the welding power is turned on, and arc welding starts; meanwhile, the welding seam protection and cooling device is arranged around the cylindrical vacuum chamber to protect and cool the welding seam immediately, and set the average cooling of the welding seam. The speed is controlled at 35°C / min, and the weld temperature at the end of welding is 130°C; after being released from the furnace, the ingot weld shows a good ...

Embodiment 2

[0047] Select 2 Ti1023 titanium alloy ingots with a diameter of 440mm, adjust the angle between the swaying plasma welding torch and the welding seam to 92°, the "pulse" rotation frequency of the Ti1023 titanium alloy ingot is 2° / min, and the pause time is 4s. The swing angle of the swaying plasma welding torch is θ=2°, the welding power is turned on, and the arc welding starts; meanwhile, the welding seam protection cooling device is arranged around the cylindrical vacuum chamber to protect and cool the welding seam immediately, and set the average cooling of the welding seam. The speed is controlled at 50°C / min, and the weld temperature at the end of welding is 70°C; after being released from the furnace, the ingot weld shows a good titanium alloy luster, and the weld is uniform and full without cracks.

Embodiment 3

[0049] Select 2 TA15 titanium alloy ingots with a diameter of 560mm, adjust the angle between the swaying plasma welding torch and the weld to 90°, the "pulse" rotation frequency of the TA15 titanium alloy ingot is 3° / min, and the pause time is 2s. The swing angle of the swaying plasma welding torch is θ=5°, the welding power is turned on, and arc welding starts; meanwhile, the welding seam protection cooling device is arranged around the cylindrical vacuum chamber to protect and cool the welding seam immediately, and set the average cooling of the welding seam. The speed is controlled at 40°C / min, and the weld temperature at the end of welding is 120°C; after being released from the furnace, the ingot weld shows a good titanium alloy luster, and the weld is uniform and full without cracks.

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Abstract

The invention discloses a welding seam protection cooling device which comprises an argon nozzle, a vacuumizing nozzle, a temperature measuring device and a feedback device. The argon nozzle sprays argon to adjust the temperature of the welding seam, and the vacuumizing nozzle balances the vacuum degree of the welding seam; the temperature measuring device detects the welding seam temperature; the feedback device controls opening and closing of the argon nozzle and the vacuumizing nozzle according to the detected welding seam temperature. The invention further discloses a method for solving the problem that the titanium alloy cast ingot is prone to cracking after welding, the welding seam protection cooling device is arranged at the corresponding position of a welding seam, vacuum plasma welding is used, the included angle between a welding gun and the welding seam and the swinging angle of the welding gun are set before welding, and the titanium alloy cast ingot rotates in a pulse mode during welding. According to the method, coarsening of crystal grains is avoided, post-welding residual stress is reduced, the forming quality of a welding seam is improved, and the problem that a large-specification titanium alloy cast ingot is prone to cracking after welding in the production process is solved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a welding seam protection cooling device and a method for solving the easy cracking of titanium alloy ingots after welding. Background technique [0002] As a metal material with excellent comprehensive properties such as high specific strength, good high and low temperature performance, and corrosion resistance, titanium alloy is favored in aerospace, marine, energy applications and other fields. The application level of titanium alloy has become a measure of national development level. one of the important symbols. Smelting is a key and necessary process in the preparation of titanium alloys. In the smelting process, in order to meet the demand for larger sizes during the use of titanium alloys and reduce production costs, usually multiple small-sized non-finished products are used in the smelting process. Titanium alloy ingots are assembled an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/50
CPCC21D9/505
Inventor 刘向宏张升懿朱军利朱仔成荀博雷强何涛何永胜王龙周
Owner 西部超导材料科技股份有限公司
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