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A kind of nickel-titanium alloy welding method

A nickel-titanium alloy and welding method technology, applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve the problems of weld cracking, difficult welding of nickel-titanium alloy, deformation and other problems

Active Publication Date: 2016-05-25
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is very difficult to realize the welding technology of nickel-titanium alloy, and it is very easy to cause cracking and deformation of the weld seam when welding nickel-titanium alloy
Moreover, due to the strong activity of nickel-titanium alloy, it is easy to form a dense oxide film on the surface when it is exposed to the air for a long time, which makes the surface of nickel-titanium alloy passivated, and the residual oil stains in the process of machining adhere to the surface, thus Welding defects that easily generate pores during the welding process seriously affect the welding quality of nickel-titanium alloys, thus failing to meet the use requirements of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Groove treatment

[0042] A groove is processed on the nickel-titanium alloy workpiece to be welded, and the inclination angle α of the groove is 35°;

[0043] 2) Groove cleaning

[0044] (1) Rinse the groove of the nickel-titanium alloy workpiece to be welded with high-pressure water;

[0045] (2) Make cleaning solution according to the following parts by weight: sodium alkyl aryl sulfate: 2 parts, sodium tripolyphosphate: 1 part, glycine: 3 parts, anhydrous sodium sulfate: 0.5 part, polyethylene glycol octylbenzene Base ether: 0.01 parts, anhydrous sodium bicarbonate: 0.05 parts, disodium edetate: 0.5 parts, purified water: 50 parts;

[0046] (3) Put the nickel-titanium alloy workpiece to be welded through step 2 into the cleaning solution and soak for 15 minutes, and polish the groove of the nickel-titanium alloy workpiece to be welded with water sandpaper, and the grinding process is carried out in the cleaning solution , until the metal luster appears on the ...

Embodiment 2

[0055] 1) Groove treatment

[0056] A groove is processed on the nickel-titanium alloy workpiece to be welded, and the inclination angle α of the groove is 45°:

[0057] 2) Groove cleaning

[0058] (1) Rinse the groove of the nickel-titanium alloy workpiece to be welded with high-pressure water;

[0059] (2) The cleaning solution is made into the following parts by weight: sodium alkyl aryl sulfate: 4 parts, sodium tripolyphosphate: 2 parts, glycine: 4.5 parts, anhydrous sodium sulfate: 1 part, polyethylene glycol octylbenzene Base ether: 2 parts, anhydrous sodium bicarbonate: 0.8 parts, disodium edetate: 1 part, purified water: 50 parts;

[0060] (3) Put the nickel-titanium alloy workpiece to be welded through step 2 into the cleaning solution and soak for 20 minutes, and polish the groove of the nickel-titanium alloy workpiece to be welded with water sandpaper, and the grinding process is carried out in the cleaning solution , until the metal luster appears on the groove ...

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Abstract

The invention relates to a nitinol welding method. The nitinol welding method includes the steps: 1) beveled edge treatment; 2) beveled edge cleaning; 3) welding; 4) stabilization treatment after welding. The step of beveled edge cleaning includes the steps of flushing with high-pressure water, cleaning with cleaning solution, laser cleaning and ultrasonic cleaning. The step of welding includes: placing two nitinol workpieces subjected to the treatment at the step one and step two on a length-adjustable table provided with scales, pre-adjusting the length of the table according to the scales according to design requirements, arranging locking components at two ends of the table with the length adjusted, subjecting beveled edges of the to-be-welded nitinol workpieces to butt joint to enable the two nitinol workpieces in butt joint to form a V-shaped beveled edge, and selecting silver welding wires for argon arc welding to obtain a weld part. The technical problems of pore defect after nitinol welding and proneness to weld failure and deformation in nitinol welding are solved by the nitinol welding method.

Description

technical field [0001] The invention belongs to a metal welding method, in particular to a nickel-titanium alloy welding method. Background technique [0002] Nickel-titanium alloy is a shape memory alloy, which is a special alloy that can automatically restore its own plastic deformation to its original shape at a certain temperature. Its stretch rate is above 20%, fatigue life reaches 1*10 to the 7th power, damping characteristics are 10 times higher than ordinary springs, and its corrosion resistance is better than the best medical stainless steel at present, so it can meet various engineering and It is a very excellent functional material for the application requirements of medicine. [0003] It is very difficult to realize the welding technology of nickel-titanium alloy, and it is very easy to cause weld cracking and deformation when welding nickel-titanium alloy. Moreover, due to the strong activity of nickel-titanium alloy, it is easy to form a dense oxide film on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/235B23K33/00C22F1/10C22F1/18C22F1/00C21D9/50
CPCB23K9/16B23K9/164B23K9/23B23K9/235B23K33/00B23K2103/14C21D9/50C22F1/00C22F1/10C22F1/18
Inventor 李宁彭小平顾明苏志强
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG