Ti-ni welding wire for welding titanium-pipeline steel composite plate and preparation method thereof

A pipeline steel and composite plate technology, applied in welding equipment, welding/welding/cutting items, welding media, etc., can solve problems such as inability to weld butt joints, and achieve the effects of large-scale production, simple preparation process, and small diameter

Inactive Publication Date: 2015-08-26
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Ti-Ni welding wire for welding titanium-pipeline steel composite plates, which solves the problem that the existing titanium-pipeline steel composite plates cannot be welded butt joint

Method used

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  • Ti-ni welding wire for welding titanium-pipeline steel composite plate and preparation method thereof
  • Ti-ni welding wire for welding titanium-pipeline steel composite plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of the above-mentioned titanium-pipeline steel composite plate welding Ti-Ni welding wire, the specific steps are as follows:

[0023] Step 1, Smelting

[0024] Weigh 52-58% of pure nickel powder and 42-48% of titanium sponge according to weight percentage; put the weighed titanium sponge into the MgO crucible in the vacuum induction melting furnace for melting; after the titanium sponge is completely melted into titanium liquid Refining, the refining temperature is 1680°C, the time is 20min, then the temperature of the titanium liquid is lowered to 1550°C and then filled with argon to make the pressure in the furnace reach 300-380mmHg; then add the weighed pure nickel powder into the molten steel and stir After 2 minutes, the Ti-Ni casting solution is discharged. The temperature of the Ti-Ni casting solution is 1480°C, and it is poured into the ingot mold. During the pouring process, the temperature of the Ti-Ni casting solution should be kept at...

Embodiment 1

[0030] Step 1, Smelting

[0031] Weigh 52% of pure nickel powder and 48% of sponge titanium according to weight percentage; put the weighed sponge titanium into the MgO crucible in the vacuum induction melting furnace for melting; after the sponge titanium is completely melted into titanium liquid, refine and refine The temperature is 1680°C, the time is 20min, then the temperature of the titanium liquid is lowered to 1550°C, and then filled with argon to make the pressure in the furnace reach 350mmHg; then the weighed pure nickel powder is added to the titanium liquid and stirred for 2 minutes to produce Ti-Ni Casting solution, the temperature of the Ti-Ni casting solution is 1480°C, and it is poured into the ingot mold. During the pouring process, the temperature of the Ti-Ni casting solution should be kept at 1480°C. At the same time, pay attention to the calm surface of the Ti-Ni casting solution and uniform pouring After pouring, store the ingot mold in a vacuum chamber f...

Embodiment 2

[0038] Step 1, Smelting

[0039]Weigh 54% of pure nickel powder and 46% of sponge titanium according to the weight percentage; put the weighed sponge titanium into the MgO crucible in the vacuum induction melting furnace for melting; after the sponge titanium is completely melted into titanium liquid, refine and refine The temperature is 1680°C, the time is 20min, then the temperature of the titanium solution is lowered to 1550°C, and then filled with argon to make the pressure in the furnace reach 360mmHg; then the weighed pure nickel powder is added to the titanium solution and stirred for 2min to produce Ti-Ni Casting solution, the temperature of the Ti-Ni casting solution is 1480°C, and it is poured into the ingot mold. During the pouring process, the temperature of the Ti-Ni casting solution should be kept at 1480°C. At the same time, pay attention to the calm surface of the Ti-Ni casting solution and uniform pouring After pouring, store the ingot mold in a vacuum chamber...

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Abstract

The invention provides a Ti-Ni welding wire for welding a Ti-pipeline steel composite board and a preparation method of the Ti-Ni welding wire. The Ti-Ni welding wire comprises the components in percentage by weight as follows: 52%-58% of Ni, smaller than or equal to 0.04% of C, smaller than or equal to 0.007% of N, smaller than or equal to 0.035% of O, smaller than or equal to 0.001% of H and the balance of Ti, wherein the sum of the weight percentages of the components is 100%. The Ti-Ni welding wire for welding the Ti-pipeline steel composite board can effectively connect weld microstructures of a Ti layer and a pipeline steel layer of the composite board, so that butt fusion welding of the Ti-pipeline steel composite board is realized, and a welded joint has excellent strength and toughness; the diameter of the Ti-Ni welding wire is small, and both manual TIG (tungsten inert gas) welding and MIG (metal inert gas) welding can be adopted; and the variety of welding material alloys is small, the preparation technology is simple, and the Ti-Ni welding wire is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and relates to a Ti-Ni welding wire for welding titanium-pipeline steel composite plates, and also relates to a preparation method of the Ti-Ni welding wire for welding titanium-pipeline steel composite plates. Background technique [0002] Titanium-pipeline steel composite plate is a new type of explosive bimetallic composite plate, which combines the advantages of titanium and pipeline steel. It has not only the strong corrosion resistance of titanium, but also the high strength and toughness of pipeline steel. Applying the composite plate to oil and gas transportation pipelines not only solves the difficulty that a single pipeline steel pipeline is easily corroded, but also solves the problem of high cost of manufacturing oil and gas transportation pipelines with a single corrosion-resistant material. However, due to the large difference in physical and chemical properties of Ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K35/40
CPCB23K35/3033B23K35/40B23K2101/18B23K2103/24
Inventor 张敏吴伟刚史倩茹井强褚巧玲李继红
Owner XIAN UNIV OF TECH
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