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Titanium alloy welding active agent and welding method

A technology of titanium alloy and activator, which is applied in the direction of welding/welding/cutting articles, welding media, welding equipment, etc., can solve the problems that restrict the development of titanium alloy activator welding process, the activator coating layer is easy to fall off, and the activator The slag crust is not easy to clean and other problems, so as to achieve the effect of reducing welding defects, insensitivity to thickness fluctuations, and improving welding efficiency

Active Publication Date: 2015-05-27
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the titanium alloy welding activators sold on the market have problems such as unstable product quality, the coating layer of the activator is prone to fall off during the welding process, the slag shell of the activator after welding is not easy to clean, and the welding seam is poorly formed. Restricts the development of titanium alloy active agent welding process

Method used

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preparation example Construction

[0027] figure 2 For the preparation process of the titanium alloy coagent of the present invention, firstly, the purchased raw materials are powdered according to the formula ratio given by the present invention, then the powder is mixed with a ball milling process and the powder particles are refined, and then the powder is screened with a sieve. After screening and performance testing, the preparation and performance testing of additives are completed.

[0028] Adopting the titanium alloy welding active auxiliary agent of the present invention to carry out welding comprises the following steps:

[0029] (1) Prepare a titanium alloy welding test piece; the size of the titanium alloy welding test piece is 100mm*200mm*(2.0-4.0)mm.

[0030] (2) Pickling the prepared titanium alloy welding test piece, first degreasing the titanium alloy welding test piece with a degreasing agent, then configuring pickling solution, pickling the titanium alloy welding test piece to be welded, an...

Embodiment 1

[0035] Step 1. Processing TC4 titanium alloy welding test piece, the size of the test plate is 100mm*200mm*3.0mm.

[0036] Step 2, pickling the titanium alloy welding test piece. Use a degreasing agent to degrease the titanium alloy welding test piece. Prepare hydrofluoric acid, nitric acid, and distilled water in a volume ratio of 1:5:6 to form a pickling solution, and pickle the parts to be welded of the titanium alloy welding test piece. Finally, dry the titanium alloy welding test piece with a clean gauze and a hair dryer.

[0037] Step 3: Align the two pickled TC4 titanium alloy welding test pieces along the length direction of 200mm, and perform welding assembly. Apply A-TIG-Ti-01 titanium alloy welding activator on the surface of the welding part (actual composition ratio CaF2: 15%; MgF2: 5%; SrF2: balance), the thickness of the activator coating layer is 0.2-1.0mm.

[0038] Step 4. The titanium alloy test piece is welded by argon tungsten arc welding, and the tip of...

Embodiment 2

[0043] Step 1. Processing TC4 titanium alloy welding test piece, the size of the test plate is 100mm*200mm*3.0mm.

[0044] Step 2, pickling the titanium alloy welding test piece. Use a degreasing agent to degrease the titanium alloy welding test piece. Prepare hydrofluoric acid, nitric acid, and distilled water in a volume ratio of 1:5:6 to form a pickling solution, and pickle the parts to be welded of the titanium alloy welding test piece. Finally, dry the titanium alloy welding test piece with a clean gauze and a hair dryer.

[0045] Step 3: Align the two pickled TC4 titanium alloy welding test pieces along the length direction of 200mm, and perform welding assembly. Apply A-TIG-Ti-01 titanium alloy welding active agent on the surface of the welding part (actual composition ratio CaF2: 25%; MgF2: 15%; SrF2: balance), the thickness of the active agent coating layer is 0.2-1.0mm.

[0046] Step 4. The titanium alloy test piece is welded by argon tungsten arc welding, and the...

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Abstract

The invention provides a titanium alloy welding active agent and a welding method, which is suitable for welding titanium alloy such as TC4. The trademark of the titanium alloy welding active agent is A-TIG-Ti-01, and the titanium alloy welding active agent consists of CaF2, MgF2 and SrF2; the mass content of the CaF2 is 15 to 25 percent; the mass content of the MgF2 is 5 to 15 percent; the mass content of the SrF2 is the residual amount. By adopting the titanium alloy welding active agent, the welding melting depth of the titanium alloy can be increased, the connector performance is excellent, and the titanium alloy welding active agent is suitable for welding a titanium alloy plane structure and a titanium alloy curved structure.

Description

technical field [0001] The invention belongs to the technical field of welding and is used for welding titanium and titanium alloy materials. Background technique [0002] Adding active agents such as oxides, chlorides, and fluorides during argon arc welding (A-TIG welding) not only reduces the porosity significantly, but also doubles the penetration depth, and the mechanical properties of the welded joints are also improved. Since the welding heat input can be greatly reduced, it will improve the structure of the welded joint and reduce stress deformation. [0003] The effects of ordinary tungsten argon arc welding (TIG welding) and A-TIG welding on the surface tension of liquid metal in the welding pool and the flow direction of liquid metal in the molten pool are as follows: figure 1 shown. The surface tension of liquid metal in TIG welding pool decreases with the increase of temperature ( figure 1 upper left), because the temperature of the center of the weld pool is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K9/167B23K9/235B23K103/14
CPCB23K9/167B23K9/235B23K35/362B23K2103/14
Inventor 王明正焦好军周炼刚程昊
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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