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

A pipeline steel, cu-mo-nb technology, applied in welding equipment, welding equipment, welding medium and other directions, can solve the problems of refractory welding connection of titanium-pipeline steel clad plate, hinder application, etc., achieve excellent performance, avoid compound The production and preparation method of the simple effect

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, weigh 900g of niobium powder and 100g of molybdenum powder respectively, place them in a vacuum furnace, heat them to 150°C and keep them warm for 1h, then put the dried niobium powder and molybdenum powder in a powder mixer, stir and mix evenly; The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of molybdenum powder is ≥99.95%, and the particle size is 100 mesh;

[0035] 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;

[0036] 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 2

[0042] Step 1, weigh 800g of niobium powder and 200g of molybdenum powder respectively, place them in a vacuum furnace, heat them to 150°C and keep them warm for 1h, then put the dried niobium powder and molybdenum powder into a powder mixer, stir and mix evenly; The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of molybdenum powder is ≥99.95%, and the particle size is 100 mesh;

[0043] 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;

[0044]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 3

[0049] Step 1, weigh 700g of niobium powder and 300g of molybdenum powder respectively, place them in a vacuum furnace, heat them to 150°C and keep them warm for 1h, then put the dried niobium powder and molybdenum powder into a powder mixer, stir and mix evenly; The purity of niobium powder is ≥99.95%, and the particle size is 100 mesh; the purity of molybdenum powder is ≥99.95%, and the particle size is 100 mesh;

[0050] 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;

[0051] 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 pow...

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Abstract

The invention discloses a Cu-Mo-Nb welding wire for titanium-pipeline steel welding. The Cu-Mo-Nb welding wire comprises a coating and a welding core, the welding core comprises, by mass, 50%-90% of niobium powder and 10%-50% of molybdenum powder, wherein the sum of the component mass percentage is 100%, and the coating is a copper belt. The invention further discloses a manufacturing method of the Cu-Mo-Nb welding wire, the niobium powder and the molybdenum powder are mixed and poured into a feeding machine, and the copper belt pretensioning belt with a U-shaped groove is filled with the mixed powder and pulled to be 1.2 mm in diameter, and the welding wire is obtained. According to the Cu-Mo-Nb welding wire and the manufacturing method, generation of intermetallic compounds between the titanium and steel can be avoided effectively due to the fact that the welding wire serves as a transition layer, the titanium and steel are well combined together, and fusion welding of a titanium-pipeline steel composite plate is achieved. The manufacturing method of the Cu-Mo-Nb welding wire is simple and high in efficiency, and large-scale batch 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-Mo-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 plate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40B23K9/16
CPCB23K9/16B23K35/40
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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