Copper-niobium (Cu-Nb) welding wire for welding titanium-pipeline steel composite plates and preparation method

A pipeline steel and composite plate technology, applied in welding equipment, welding/welding/cutting items, welding media, etc., can solve the problems of titanium-pipeline steel composite plate refractory welding connection, hindering application, etc., and achieve excellent performance and preparation The effect of simple process and high purity

Inactive Publication Date: 2015-09-16
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in physical and chemical properties between titanium and steel, it is easy to form low melting point eutectic and TiFe, TiFe 2 Intermetallic brittle compounds such as titanium-pipeline steel composite plates are difficult to be welded and connected, which seriously hinders their application in oil and gas, chemical and other pipelines
At present, there are few reports on the transition layer welding materials for the fusion welding connection of titanium-pipeline steel clad plates

Method used

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  • Copper-niobium (Cu-Nb) welding wire for welding titanium-pipeline steel composite plates and preparation method
  • Copper-niobium (Cu-Nb) welding wire for welding titanium-pipeline steel composite plates and preparation method
  • Copper-niobium (Cu-Nb) welding wire for welding titanium-pipeline steel composite plates and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, put the niobium powder with a purity of ≥99.95% and a particle size of 100 mesh in a clean and dry vessel, put it in a vacuum furnace, heat it to 150°C, and keep it warm for 1 hour;

[0034] Step 2, put the copper strip on the tape unwinding machine, and roll the U-shaped groove after passing through the copper strip cleaning equipment; then grind the front end of the copper strip on the wire rolling machine, put it into a mold with an aperture of 2.5mm, and then pass The forming machine carries out the jointing of the copper tape to make a pre-drawn tape with a dense interface;

[0035] Step 3, pour the niobium powder dried in step 1 on the feeder, fill it into the pre-drawn belt with U-shaped grooves, control the filling rate of the niobium powder to 10%, and draw it into a welding wire with a diameter of 2.5 mm;

[0036] Step 4, put the welding wire obtained in step 3 on the reducing machine, change the molds with different apertures to reduce the diameter st...

Embodiment 2

[0041] Step 1, put the niobium powder with a purity of ≥99.95% and a particle size of 100 mesh in a clean and dry container, put it in a vacuum furnace, heat it to 150°C, and keep it warm for 1 hour;

[0042] Step 2, put the copper strip on the tape unloading machine, and roll the U-shaped groove after passing through the copper strip cleaning equipment; then grind the front end of the copper strip on the wire rolling machine, put it into a mold with an aperture of 2.5mm, and then pass The forming machine carries out the jointing of the copper tape to make a pre-drawn tape with a dense interface;

[0043] Step 3, pour the niobium powder dried in step 1 into the feeder, fill it into the pre-drawn belt with U-shaped grooves, control the filling rate of the niobium powder to 13%, and draw it into a welding wire with a diameter of 2.5 mm;

[0044] Step 4, put the welding wire obtained in step 3 on the reducing machine, replace the molds with different apertures and draw the diamet...

Embodiment 3

[0048] Step 1, put the niobium powder with a purity of ≥99.95% and a particle size of 100 mesh in a clean and dry vessel, put it in a vacuum furnace, heat it to 150°C, and keep it warm for 1 hour;

[0049] Step 2, put the copper strip on the tape unwinding machine, and roll the U-shaped groove after passing through the copper strip cleaning equipment; then grind the front end of the copper strip on the wire rolling machine, put it into a mold with an aperture of 2.5mm, and then pass The forming machine carries out the jointing of the copper tape to make a pre-drawn tape with a dense interface;

[0050] Step 3, pour the niobium powder dried in step 1 on the feeder, fill it into the pre-drawn belt with U-shaped grooves, control the filling rate of the niobium powder to 15%, and draw it into a welding wire with a diameter of 2.5 mm;

[0051] Step 4, put the welding wire obtained in step 3 on the reducing machine, change the molds with different apertures to reduce the diameter st...

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Abstract

The invention discloses a copper-niobium (Cu-Nb) welding wire for welding titanium-pipeline steel composite plates, which comprises a coating and a welding core, wherein the coating is a copper belt, and the welding core is niobium powder. The invention further discloses a method for preparing the Cu-Nb welding wire for welding titanium-pipeline steel composite plates, wherein the dried niobium powder is poured into a feeder, and is filled into a copper belt pre-tension belt, and can be pulled to be a welding wire which is 1.2mm in diameter. The Cu-Nb welding wire for welding the titanium-pipeline steel composite plates is suitable for welding manual tungsten arc argon-shielded welding and automatic tungstun arc welding, can effectively prevent compounds from being produced between titanium and steel metals by being used as a transition layer, and also can excellently combine titanium and steels together, thereby achieving welding and butting of the welding titanium-pipeline steel composite plates. The Cu-Nb welding wire for welding the titanium-pipeline steel composite plates is simple in preparation process and high in efficiency, and is convenient for large batch production.

Description

technical field [0001] The invention belongs to the technical field of welding materials and their preparation, and in particular relates to a Cu-Nb welding wire for welding titanium-pipeline steel composite plates, and also relates to a preparation method of the welding wire. Background technique [0002] The titanium-pipeline steel bimetal composite plate with explosive compounding combines the advantages of the two metals. It not only has the strong corrosion resistance of titanium and the high strength and toughness of pipeline steel, but also saves titanium materials and reduces production costs. Titanium-pipeline steel composite panels are widely used in petroleum, chemical and other industries due to their low price and superior performance. However, due to the large difference in physical and chemical properties between titanium and steel, it is easy to form low melting point eutectic and TiFe, TiFe 2 Intermetallic brittle compounds such as titanium-pipeline steel c...

Claims

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Application Information

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IPC IPC(8): B23K35/32B23K35/40
CPCB23K35/32B23K35/40B23K2103/16
Inventor 张敏谢威威樊庆仰韩挺刘娟娟张明
Owner XIAN UNIV OF TECH
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