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Ag-V welding wire for welding titanium-pipeline-steel composite plate and preparing method thereof

A pipeline steel and composite plate technology, which is applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the refractory welding connection of titanium-pipeline steel composite plate, the large difference in chemical properties, and hinder the application of oil and gas pipelines and other issues to achieve the effect of improving strength and toughness, optimizing the structure of the transition layer, and facilitating large-scale mass production

Inactive Publication Date: 2015-07-01
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 differences in the physical and chemical properties of titanium and steel, it is easy to form low-melting eutectics and brittle compounds between Ti and Fe metals, making it difficult to weld titanium-pipeline steel composite plates, which seriously hinders its application in oil and gas pipelines. Applications
At present, there are only a few reports on the welding process of the titanium-pipeline steel clad plate, and the existing titanium-pipeline steel clad plate butt joints are all made of titanium and steel with a cover plate that are incompatible with each other. method, this welding method is complicated in process and difficult to realize engineering application, and there is no report on its fusion welding connection welding materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the above-mentioned Ag-V welding wire for welding the titanium-pipeline steel composite plate, the specific steps are as follows:

[0026] Step 1, put the V powder in a vacuum heating furnace at 200°C and bake for 2.5 hours to remove the crystal water in the V powder; the purity of the V powder is 99.99%, and the particle size is 80-100 mesh;

[0027] Step 2, put the dried V powder into a reagent bottle with a rubber stopper, insert one end of the pure silver tube into the reagent bottle through the rubber stopper, close the other end of the pure silver tube, then shake the reagent bottle upside down, Put the V powder into the pure silver tube, and control the filling amount of the V powder to be 10% to 20%;

[0028] Step 3: Shake the pure silver tube containing the V powder horizontally for 1-2 minutes, so that the V powder is evenly spread in the pure silver tube, and finally draw it to obtain an Ag-V welding wire with a diameter of 1.2mm.

Embodiment 1

[0030] Step 1, put the V powder in a vacuum heating furnace with a temperature of 200°C and bake for 2.5 hours to remove the crystal water in the V powder; the purity of the V powder is 99.99%, and the particle size is 80 mesh;

[0031] Step 2, put the dried V powder into a reagent bottle with a rubber stopper, insert one end of the pure silver tube into the reagent bottle through the rubber stopper, close the other end of the pure silver tube, then shake the reagent bottle upside down, Make the V powder enter the pure silver tube, and control the filling amount of the V powder to be 10%;

[0032] Step 3: Shake the pure silver tube containing the V powder horizontally for 1 min, so that the V powder is evenly spread in the pure silver tube, and finally draw it to obtain an Ag-V welding wire with a diameter of 1.2mm.

[0033] Using the Ag-V welding wire (transition layer) prepared in Example 1, cooperate with pure titanium wire (titanium layer), and ER50-6 pipeline steel weldin...

Embodiment 2

[0036] Step 1, put the V powder in a vacuum heating furnace with a temperature of 200°C and bake for 2.5 hours to remove the crystal water in the V powder; the purity of the V powder is 99.99%, and the particle size is 100 mesh;

[0037] Step 2, put the dried V powder into a reagent bottle with a rubber stopper, insert one end of the pure silver tube into the reagent bottle through the rubber stopper, close the other end of the pure silver tube, then shake the reagent bottle upside down, Make the V powder enter the pure silver tube, and control the filling amount of the V powder to be 15%;

[0038] Step 3. Shake the pure silver tube containing the V powder horizontally for 2 minutes, so that the V powder is evenly spread in the pure silver tube, and finally draw it to obtain an Ag-V welding wire with a diameter of 1.2mm.

[0039] Using the Ag-V welding wire (transition layer) prepared in Example 2, cooperate with pure titanium wire (titanium layer), and ER50-6 pipeline steel w...

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Abstract

The invention discloses an Ag-V welding wire for welding a titanium-pipeline-steel composite plate. The Ag-V welding wire comprises a coating and a core wire, wherein the coating is a pure silver tube, and the core wire is made of V powder. The invention further discloses a preparing method of the Ag-V welding wire. The preparing method includes the steps of loading the dried V powder into a reagent bottle with a rubber plug, inserting one end of the pure silver tube into the reagent bottle through the rubber plug, and closing the other end of the pure silver tube; then inversely shaking the reagent bottle to enable the V powder to enter the pure silver tube, horizontally shaking the pure silver tube with the V powder, and finally obtaining the welding wire through drawing. According to the Ag-V welding wire for welding the titanium-pipeline-steel composite plate, Ag elements, V elements and Ti elements have the certain solubility, and brittle phases such as intermetallic compounds are avoided; due to V elements, the structure of a transition layer can be optimized, and the toughness of a weld joint can be improved; in addition, as the melting point of the V elements is high, the melting point of the core wire can be increased, and follow-up titanium cover face welding can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to an Ag-V welding wire for welding titanium-pipeline steel composite plates, and also relates to a preparation method of the welding wire. Background technique [0002] Titanium-pipeline steel composite plate is a new type of explosive bimetallic composite plate, which combines the strong corrosion resistance of titanium and the high strength and toughness of pipeline steel. Realizing its application on oil and gas transportation pipelines can not only solve the difficulty that a single pipeline steel pipeline is easily corroded, but also solve the high cost problem of using a single corrosion-resistant material to manufacture oil and gas transportation pipelines. However, due to the large difference in physical and chemical properties of titanium and steel, it is easy to form low-melting eutectics and brittle compounds between Ti and Fe metals, making it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/32B23K35/40
CPCB23K35/3006B23K35/32B23K35/406
Inventor 张敏樊庆仰谢威威褚巧玲罗海龙韩挺
Owner XIAN UNIV OF TECH