Preparation method of welding wire for welding titanium-pipeline steel composite plate near steel layer

A pipeline steel and composite plate technology, which is applied to welding equipment, welding/welding/cutting items, welding media, etc., can solve the problems that titanium-pipeline steel composite plates cannot be welded and connected, and facilitate large-scale mass production and preparation The effect of simple process and excellent toughness

Inactive Publication Date: 2016-04-20
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a welding wire for welding titanium-pipeline steel composite plate near the steel layer, which is used in conjunction with the V welding wire (near the titanium layer) with a V content of 99.6%, so as to solve the problem that the titanium-pipeline steel composite plate cannot be welded butt joint The problem

Method used

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  • Preparation method of welding wire for welding titanium-pipeline steel composite plate near steel layer

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preparation example Construction

[0022] The preparation method of the welding wire for welding titanium-pipeline steel composite plate near the steel layer, the specific steps are as follows:

[0023] Step 1, weighing Si2.7~3.3% and Mn1.2~1.8% respectively after surface treatment according to mass percentage, and the balance is Cu;

[0024] Step 2: Put the metal Cu and Si into the MgO crucible in the vacuum induction melting furnace for melting. After all the metals in the furnace are melted and the surface of the molten pool is calm and no bubbles escape, transfer to refining. The refining temperature is 1130-1150°C , the time is 20-25min; after refining, when the temperature of the molten metal drops to 1090°C, fill it with argon; then add the metal Mn into the molten metal, stir for 2-3min, and then release the furnace, the temperature of which is 1090°C;

[0025] Step 3: Pouring the metal mixture into the ingot mold. During the pouring process, the surface of the metal mixture is kept calm and poured even...

Embodiment 1

[0029] Step 1, weighing Si2.7%, Mn1.2%, Cu96.1% through surface treatment respectively by mass percentage;

[0030] Step 2. Put metal Cu and Si into the MgO crucible in the vacuum induction melting furnace for melting. After all the metals in the furnace are melted and the surface of the molten pool is calm without bubbles escaping, turn to refining. The refining temperature is 1130°C and the time is 20 minutes; after refining, when the temperature of the molten metal drops to 1090°C, fill it with argon; then add metal Mn into the molten metal, stir for 2 minutes, and then take it out of the furnace, the temperature of which is 1090°C;

[0031] Step 3, pour the metal mixture into the ingot mold. During the pouring process, the surface of the metal mixture is kept calm and poured evenly. The ingot mold is stored in a vacuum chamber for 30 minutes, and the ingot is taken out and cooled to room temperature; during the smelting process, each group Sub-weight percentage control is:...

Embodiment 2

[0037] Step 1, weighing Si2.9% through surface treatment, Mn1.4%, Cu95.7% respectively by mass percentage;

[0038] Step 2. Put metal Cu and Si into the MgO crucible in the vacuum induction melting furnace for melting. After all the metals in the furnace are melted and the surface of the molten pool is calm without bubbles escaping, turn to refining. The refining temperature is 1140°C, and the time is 22min; after refining, when the temperature of the molten metal drops to 1090°C, fill it with argon; then add metal Mn into the molten metal, stir for 2.5min, and then release from the furnace, the temperature of which is 1090°C;

[0039] Step 3, pour the metal mixture into the ingot mold. During the pouring process, the surface of the metal mixture is kept calm and poured evenly. The ingot mold is stored in a vacuum chamber for 35 minutes, and the ingot is taken out and cooled to room temperature; during the smelting process, each group Sub-weight percentage control is: C≤0.04%,...

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Abstract

The welding wire used for welding the near-steel layer of titanium-pipeline steel composite plate is composed of the following components by mass percentage: Si2.7~3.3%, Mn1.2~1.8%, C≤0.04%, P≤0.007%, S≤ 0.035%, the balance is Cu, and the sum of the mass percentages of each component is 100%. The invention also discloses its preparation method: pour Cu, Si, Mn into the ingot mold to form the ingot; Coiling - heat treatment - dry drawing - coiling - polishing - coiling - winding. The welding wire of the present invention is used as the near-steel layer, and the V welding wire is used as the near-titanium layer to effectively connect the titanium layer of the composite plate with the welding seam structure of the pipeline steel layer, so as to realize the welding butt joint of the titanium-pipeline steel composite plate; the welded joint has excellent strength toughness.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a welding wire used for welding the near-steel layer of a titanium-pipeline steel composite plate, 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/302B23K35/40B23K2103/16
Inventor 张敏史倩茹谢威威井强樊庆仰
Owner XIAN UNIV OF TECH
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