Cu-v-nb welding wire for welding titanium-pipeline steel and preparation method thereof

A pipeline steel and welding wire technology, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve problems such as hindering application, refractory welding connection of titanium-pipeline steel composite plate, etc., to avoid the generation of compounds, Excellent performance and high efficiency

Inactive Publication Date: 2017-11-03
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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  • Cu-v-nb welding wire for welding titanium-pipeline steel and preparation method thereof
  • Cu-v-nb welding wire for welding titanium-pipeline steel and preparation method thereof
  • Cu-v-nb welding wire for welding titanium-pipeline steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1, weigh 500g of vanadium powder and 500g of niobium powder respectively, place them in a vacuum furnace and heat them to 150°C, keep warm for 1h, then put the dried niobium powder and molybdenum powder into a powder mixer, stir and mix evenly;

[0036] The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of vanadium powder is 99.95%, and the particle size is 100 mesh;

[0037] Step 2, put the copper strip on the tape unloading machine, and then 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 on the 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;

[0038] Step 3, pour the mixed powder of step 1 into the feeder, fill it into the pre-drawn copper tape with U-shaped grooves, control the filling rate of the powd...

Embodiment 2

[0044] Step 1, weigh 600g of vanadium powder and 400g of niobium powder respectively, place them in a vacuum furnace and heat them to 150°C, keep warm for 1h, then put the dried niobium powder and molybdenum powder into a powder mixer, stir and mix evenly;

[0045] The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of vanadium powder is 99.95%, and the particle size is 100 mesh;

[0046]Step 2, put the copper strip on the tape unloading machine, and then 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 on the 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;

[0047] Step 3, pour the mixed powder of step 1 into the feeder, fill it into the pre-drawn copper tape with U-shaped grooves, control the filling rate of the powde...

Embodiment 3

[0052] Step 1, weigh 700g of vanadium powder and 300g of niobium powder respectively, place them in a vacuum furnace and heat to 150°C, keep warm for 1h, then put the dried niobium powder and molybdenum powder into a powder mixer, stir and mix evenly;

[0053] The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of vanadium powder is 99.95%, and the particle size is 100 mesh;

[0054] Step 2, put the copper strip on the tape unloading machine, and then 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 on the 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;

[0055] Step 3, pour the mixed powder from step 1 into the feeder, fill it into the pre-drawn copper tape with U-shaped grooves, control the filling rate of the powder ...

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Abstract

The invention discloses a Cu-V-Nb welding wire for titanium and pipeline steel welding. The welding wire comprises a coating and a core wire. The core wire comprises, by mass, 50-90% of vanadium powder and 10-50% of niobium powder, wherein the sum of the mass percents of the vanadium powder and the niobium powder is 100%. The coating is a copper strip. The invention further discloses a manufacturing method of the Cu-V-Nb welding wire. The method includes the steps that the dried niobium powder and dried molybdenum powder are mixed and then poured on a feeding machine and filled into a red copper strip pretensioning strip provided with a U-type groove, and the welding wire is obtained through drawing until the diameter is 1.2 mm. The welding wire is suitable for manual argon tungsten-arc welding and automatic argon tungsten-arc welding. The welding wire serves as a transition layer, can effectively avoid generation of titanium and steel intermetallic compounds, the structure of titanium and the structure of steel are well combined, and fusion welding butt joint of a titanium and pipeline steel composite plate is achieved. The manufacturing method is simple, efficiency is high, and large-scale mass production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of welding materials and their preparation, and in particular relates to a Cu-V-Nb welding wire for titanium-pipeline steel welding, 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 composite plates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/24B23K35/40B23K103/24
CPCB23K35/0272B23K35/24B23K35/404B23K2103/24
Inventor 张敏谢威威樊庆仰韩挺刘娟娟褚巧玲
Owner XIAN UNIV OF TECH
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