Self-shielded flux-cored wire suitable for welding of TC4 titanium alloy

A technology of flux-cored welding wire and self-protection, applied in welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of increasing workload and reducing welding efficiency, achieving low porosity, solving low welding efficiency, good linear effect

Pending Publication Date: 2020-10-09
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the above welding wire, the welding process requires argon to protect the molten

Method used

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  • Self-shielded flux-cored wire suitable for welding of TC4 titanium alloy
  • Self-shielded flux-cored wire suitable for welding of TC4 titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of raw materials:

[0035] TC4 titanium alloy self-shielding flux-cored wire is composed of titanium strip and flux-cored wire: the mass fraction of titanium strip in TC4 titanium alloy self-shielded flux-cored wire is 79%, and the mass fraction of flux-core powder in TC4 titanium alloy self-shielded flux-cored wire is The quality score is 21%;

[0036] The grade of titanium belt is TA1, and its chemical composition is as follows in terms of mass percentage: Ti≥99%, Fe0.003%, C 0.012%, N≤0.001%, H≤0.001%, O≤0.04%, TA1 titanium The thickness of the belt is 0.3mm and the width is 9.5mm;

[0037] The drug core powder is composed of Al powder, V powder, rare earth fluoride, magnesium fluoride, calcium fluoride, barium chloride and carbon nanotubes. In terms of mass percentage, its chemical composition is as follows: Al powder 18%, V powder 12%, rare earth fluoride 16%, magnesium fluoride 27%, calcium fluoride 15%, barium chloride 10%, carbon nanotube 2%; ...

Embodiment 2

[0043] (1) Preparation of raw materials:

[0044] TC4 titanium alloy self-shielding flux-cored welding wire is composed of titanium strip and flux-cored wire: the mass fraction of titanium strip in TC4 titanium alloy self-shielding flux-cored welding wire is 82%, and the mass fraction of flux-core powder in TC4 titanium alloy self-shielding flux-cored welding wire is The quality score is 18%;

[0045] The grade of titanium belt is TA1, and its chemical composition is as follows in terms of mass percentage: Ti≥99%, Fe0.005%, C 0.014%, N≤0.001%, H≤0.001%, O≤0.04%, TA1 titanium The thickness of the belt is 0.4mm and the width is 9.7mm;

[0046] The drug core powder is composed of Al powder, V powder, rare earth fluoride, magnesium fluoride, calcium fluoride, barium chloride and carbon nanotubes, and its chemical composition is as follows in terms of mass percentage: Al powder 21%, V powder 15%, rare earth fluoride 14%, magnesium fluoride 22%, calcium fluoride 13%, barium chlori...

Embodiment 3

[0054] (1) Preparation of raw materials:

[0055] TC4 titanium alloy self-shielding flux-cored wire is composed of titanium strip and flux-cored wire: the mass fraction of titanium strip in TC4 titanium alloy self-shielded flux-cored wire is 84%, and the mass fraction of flux-core powder in TC4 titanium alloy self-shielded flux-cored wire is The quality score is 16%;

[0056] The grade of titanium belt is TA1, and its chemical composition is as follows in terms of mass percentage: Ti≥99%, Fe0.006%, C 0.016%, N≤0.001%, H≤0.001%, O≤0.04%, TA1 titanium The thickness of the belt is 0.6mm and the width is 10mm;

[0057] The drug core powder is composed of Al powder, V powder, rare earth fluoride, magnesium fluoride, calcium fluoride, barium chloride and carbon nanotubes. In terms of mass percentage, its chemical composition is as follows: Al powder 20%, V powder 14%, rare earth fluoride 15.5%, magnesium fluoride 26%, calcium fluoride 10%, barium chloride 13%, carbon nanotube 1.5%...

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Abstract

The invention discloses a self-shielded flux-cored wire suitable for welding of TC4 titanium alloy. The wire comprises the following raw materials in percentage by mass: 79%-84% of titanium belt and 21%-16% of flux-cored powder; the titanium belt comprises the following components in percentage by mass: more than or equal to 99% of Ti, 0.003%-0.006% of Fe, C 0.012%-0.016%, less than or equal to 0.002% of N, less than or equal to 0.001% of H and less than or equal to 0.07% of O; and the flux-cored powder comprises the following components in percentage by mass: 18%-21% of Al powder, 12%-15% ofV powder, 11%-16% of rare earth fluoride, 22%-27% of magnesium fluoride, 10%-15% of calcium fluoride, 10%-14% of barium chloride and 1%-2% of carbon nanotubes. Compared with the prior art, the self-shielded flux-cored wire suitable for welding of TC4 titanium alloy has stable arc, good weld formation and high welding efficiency in the welding process.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a self-shielding flux-cored welding wire suitable for TC4 titanium alloy welding and a preparation method thereof. Background technique [0002] Titanium and titanium alloys have the characteristics of low density, high strength, good corrosion resistance, non-toxic and non-magnetic, and are widely used in aerospace, navigation, pressure vessels, oil pipelines, and weapon industries. According to data, some armored vehicles are The requirements of the TC4 titanium alloy have been applied to important structural parts, and the performance test is excellent. Welding technology plays an important role in improving material utilization, reducing weight, repairing, and efficient connection in this research. [0003] TC4 titanium alloy has strong activity under high temperature conditions, and the welding process is prone to problems such as severe oxidation and high porosity. At pre...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/32B23K35/28B23K103/14
CPCB23K9/173B23K9/32B23K35/0266B23K35/286B23K2103/14
Inventor 张龙陈东高马良超王大锋张迎迎马永峰戴宇郭庆虎
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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