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Titanium and titanium alloy consumable electrode noble gas protective welding technique

An inert gas and shielded welding technology, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of slow welding speed, large residual stress, welding deformation, etc., reduce unit energy input, improve overall quality, and improve welding production The effect of improving efficiency

Active Publication Date: 2009-06-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a titanium and titanium alloy melting inert gas shielded welding technology, through the manual melting inert gas shielded welding process test, to solve the manual MIG welding process and engineering of various positions of titanium and titanium alloy components Apply operational technical problems to realize MIG welding of space position welds of titanium and titanium alloy complex structural parts, so as to improve the quality of welding structure, improve welding production efficiency, and solve the problem of welding complex space and space of thin-walled titanium components below 10mm by common TIG welding method. In position welding, the welding speed is slow, the deposition efficiency is low, the welding deformation and the residual stress are large

Method used

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  • Titanium and titanium alloy consumable electrode noble gas protective welding technique
  • Titanium and titanium alloy consumable electrode noble gas protective welding technique
  • Titanium and titanium alloy consumable electrode noble gas protective welding technique

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using the invented molten inert gas shielded welding technology, the welding of TC4 titanium alloy deep sea test frame with plate thickness of 8mm+10mm and structure size of 3300mm × 3600mm × 4200mm is carried out. The welding process adopts the push-pull wire feeding method and adopts the TC3 grade. The welding wire, the droplet transfer form is jet transfer, the welding arc is a combination of pulsed and continuous combustion arcs, and the welding of two positions of fixed flat welding and horizontal welding is completed; the welding joints are designed as "T" joint fillet welds and Butt welds in the form of corner joints.

[0030] The blunt edge thickness h of the groove ranges from 0mm to 4mm, the assembly clearance p ranges from 0 to 5mm, and the groove angles α and β range from 40° to 70°. For joint and bevel forms see image 3 and Figure 4 shown.

[0031] When manually controlling the welding torch to realize the welding operation, the moving speed of the wel...

Embodiment 2

[0038] Using the invented molten electrode inert gas shielded welding technology, a double-layer, hyperboloid TA5 titanium alloy diversion structure simulation body with a plate thickness of 4mm+16mm, a length of 1200mm, a width of 750mm and a height of 400mm was welded. The welding process adopts The push-pull wire feeding method adopts TA4 grade welding wire, the droplet transfer form is a combination of short-circuit and jet transfer, and the welding arc is a combination of pulsed and continuous combustion arcs to achieve fixed flat welding, vertical welding and horizontal welding. welding; welded joints are designed as backing butt welds and “T” joint fillet welds.

[0039] The blunt edge thickness h of the groove ranges from 0mm to 4mm, the assembly clearance p ranges from 0 to 5mm, and the groove angles α and β range from 40° to 70°. For joint and bevel forms see figure 1 and image 3 shown.

[0040] When manually controlling the welding torch to realize the welding o...

Embodiment 3

[0047] Using the invented molten electrode inert gas shielded welding technology, the welding process of the double-layer, hyperboloid TA5+TA2 titanium alloy diversion structure entity with the traveling structure size of 2000mm × 2200mm × 3300mm adopts the push-pull wire feeding method. For the welding wires of TA4 and TA2 grades, the droplet transfer form is jet transfer, and the welding arc is a combination of pulsed and continuous combustion arcs, to complete the four positions of fixed flat welding, vertical welding, horizontal welding and overhead welding; welding joints include Butt welds with and without backing plates, "T" joint fillet welds, and butt welds in the form of fillet joints.

[0048] The blunt edge thickness h of the groove ranges from 0mm to 4mm, the assembly clearance p ranges from 0 to 5mm, and the groove angles α and β range from 40° to 70°. For joint and bevel forms see figure 1 , figure 2 , image 3 and Figure 4 shown.

[0049] When manually c...

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Abstract

The invention provides a protection welding technique for melting-pole inert gases (MIG) of titanium and a titanium alloy. A welding process adopts a wire sending mode of a pushing and pulling type, a melting drop transition form is short circuit transition or jetting transition, a welding electric arc is combined by mutually switching a pulse and an electric arc of continuous combustion, and a welding position and a corresponding welding rule are selected properly according to different welding work conditions. A welding joint is designed into a butt joint welding seam with a padding plate or without the padding plate, and a T-shaped joint angle welding seam and a butt joint welding seam in an angle joint form. The welding groove design is carried out correspondingly. Incline angles theta and omega of the welding seams relative to a welding gun are controlled. High-purity argon gas or helium and argon combing protection are adopted in the welding process to realize the welding. The technique solves the problems of controlling the MIG welding process of complicated structural parts of large thin walls of the titanium and the titanium alloy and relevant technical problems, realizes the engineered application to the MIG welding of the titanium and the titanium alloy, improves the welding production efficiency by 1 to 3 times, and improves the comprehensive quality of the welding seams and welding components.

Description

technical field [0001] The present invention relates to a welding technology, in particular to a titanium and titanium alloy molten electrode inert gas shielded welding technology. Background technique [0002] With the increasing size and complexity of modern industrial and national defense equipment, the engineering application of efficient and stable welding technology for metal structural parts is becoming more and more extensive. One of the preferred techniques for welding titanium structural parts. At present, there are few laboratory process data and articles about manual MIG welding of titanium and titanium alloys, and there are few reports on engineering applications. At present, the 725th Research Institute of China Shipbuilding Industry Corporation is the first unit in my country to promote manual melting extremely inert gas shielded welding technology in the application of titanium alloy engineering welding. [0003] At present, large-scale structural parts of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/12B23K33/00B23K35/38
Inventor 刘志颖余巍张建欣
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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