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Full-automatic gas protection flux-cored wire for pipeline steel

A flux-cored welding wire, fully automatic technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of non-fusion, low pass rate, etc., achieve good low-temperature impact performance, meet construction requirements, good Effect of anti-porosity performance

Inactive Publication Date: 2017-06-20
TIANJIN YONGCHANG WELDING WIRES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, the proportion of automatic welding of long-distance pipelines is less than 10%. In the construction of the second Sino-Russian crude oil line (Moda Second Line), clear requirements were put forward, and the proportion of automatic welding exceeded 70%. Promote the application of automatic welding, the use of solid welding wire is easy to produce unfused defects, and the pass rate is low, and the use of gas-shielded flux cored welding wire can effectively reduce the occurrence of defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A fully automatic gas-shielded flux-cored welding wire for pipeline steel, including a flux core and a sheath;

[0037] The drug core includes the following components in weight percentage: 36% rutile; 17% manganese metal; 12% feldspar; 3% rare earth fluoride; 2% potassium fluorosilicate; 3% cryolite; 9% nickel powder; molybdenum Powder 3%; Magnesium powder 7%; Iron powder 8%;

[0038] The purity of titanium oxide in the rutile is 98%; the purity of silicon dioxide in the feldspar is 70%; the sum of potassium oxide and sodium oxide is 13% of the total amount of feldspar;

[0039] The flux core accounts for 18% of the total mass of the flux cored wire;

[0040] The particle size of the drug core is controlled at 160 mesh.

[0041] Experimental results:

[0042] The chemical composition (weight%) of the deposited metal of fully automatic gas-shielded flux-cored welding wire for pipeline steel, C 0.04%; Si0.8%; Mn 1.2%; S 0.01%; P 0.01%; Cr 0.1%; Ni 1.2%; The balance i...

Embodiment 2

[0045] A fully automatic gas-shielded flux-cored welding wire for pipeline steel, including a flux core and a sheath;

[0046] The drug core includes the following components in weight percentage: 42% rutile; 13% manganese metal; 8% feldspar; 6% rare earth fluoride; 5% potassium fluorosilicate; 5% cryolite; 8% nickel powder; Powder 1%; Magnesium powder 4%; Iron powder 8%;

[0047] The purity of titanium oxide in the rutile is 98%; the purity of silicon dioxide in the feldspar is 63%; the sum of potassium oxide and sodium oxide is 13% of the total amount of feldspar;

[0048] The flux core accounts for 20% of the total mass of the flux cored wire;

[0049] The particle size of the drug core is controlled at 180 mesh.

[0050] Experimental results:

[0051] The chemical composition (weight%) of the deposited metal of fully automatic gas-shielded flux-cored welding wire for pipeline steel, C 0.02%; Si0.8%; Mn 1%; S 0.015%; P 0.015%; Cr0.1%; Ni 0.4% ; The balance is Fe.

[00...

Embodiment 3

[0054] A fully automatic gas-shielded flux-cored welding wire for pipeline steel, including a flux core and a sheath;

[0055] The drug core includes the following components in weight percentage: 38% rutile; 13% manganese metal; 9% feldspar; 4% rare earth fluoride; 3% potassium fluorosilicate; 4% cryolite; 10% nickel powder; Powder 2%; Magnesium powder 5%; Iron powder 12%;

[0056] The purity of titanium oxide in the rutile is 98%; the purity of silicon dioxide in the feldspar is 68%; the sum of potassium oxide and sodium oxide is 12% of the total amount of feldspar;

[0057] The flux core accounts for 20% of the total mass of the flux cored wire;

[0058] The particle size of the drug core is controlled at 60 mesh.

[0059] Experimental results:

[0060] Chemical composition (weight percent) of deposited metal of fully automatic gas-shielded flux-cored welding wire for pipeline steel, C 0.06%; Si 0.7%; Mn 1.4%; S 0.01%; P 0.01%; Cr 0.7%; Ni 0.8%; The amount is Fe.

[0061...

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Abstract

The invention provides a full-automatic gas protection flux-cored wire for pipeline steel. The full-automatic gas protection flux-cored wire for pipeline steel comprises a flux core and a skin, wherein the flux core comprises, by weight percent, 36% to 42% of rutile, 13% to 17% of manganese metal, 8% to 12% of feldspar, 3% to 6% of rare earth fluoride, 2% to 5% of potassium fluosilicate, 3% to 6% of cryolite, 8% to 12% of nickel powder, 1% to 3% of molybdenum powder, 4% to 7% of magnesium powder and 8% to 12% of iron powder. According to the full-automatic gas protection flux-cored wire for pipeline steel, common welding defects of incomplete fusion, slag inclusion and the like are overcome, the good penetration effect is achieved, and flat attractive welding lines are formed.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a fully automatic gas-shielded flux-cored welding wire. Background technique [0002] The application of fully automatic welding of pipelines in developed countries in Europe and America is very common, and the application proportion accounts for about 80% of the welding engineering volume. In my country, the proportion of automatic welding of long-distance pipelines is less than 10%. In the construction of the second Sino-Russian crude oil line (Moda Second Line), clear requirements were put forward, and the proportion of automatic welding exceeded 70%. Promote the application of automatic welding, the use of solid welding wire is easy to produce unfused defects, and the pass rate is low, and the use of gas-shielded flux-cored welding wire can effectively reduce the occurrence of defects. Contents of the invention [0003] In view of this, the present invention aims to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36
CPCB23K35/3601
Inventor 侯杰昌马强
Owner TIANJIN YONGCHANG WELDING WIRES
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