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Welding method of nickel-based material pipeline

A welding method and pipeline technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., to achieve good weld formation, avoid embrittlement, and improve welding quality.

Inactive Publication Date: 2019-12-13
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole construction process of N06600 welding technology is a chain of links, which is basically a main construction line, all of which are front and rear construction processes. The construction of the next construction process must wait for the construction of the previous process and the acceptance of the inspection. The development of this technology abroad The application is relatively mature, but as the properties of nickel-based alloys with various characteristics are developed, its welding technology is in the initial application stage

Method used

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  • Welding method of nickel-based material pipeline
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  • Welding method of nickel-based material pipeline

Examples

Experimental program
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Effect test

Embodiment 1

[0109] Embodiment 1, a welding method of a nickel-based material pipeline of the present invention, comprising:

[0110] Step 1. Cold cut the pipe and process the bevel, then polish and clean both sides of the bevel with solvent;

[0111] Step 2. Place the welding workpiece on the modified tooling;

[0112] Step 3, replace the air in the pipeline with argon, and perform tack welding;

[0113] Step 4. When welding, argon tungsten arc welding is used for bottom welding, and manual arc welding is used for filling and covering.

[0114] In another embodiment, in the fourth step, when welding, ERNiCr-3 is used as the welding wire, ENiCrFe-1 is used as the welding rod, and the baking temperature of the welding rod is 200°C.

[0115] In the first step, the slope deviation of the groove is not greater than 1% of the outer diameter of the pipe.

[0116] In another embodiment, the solvent includes acetone or alcohol.

[0117] In another embodiment, the direct current connection meth...

Embodiment 2

[0128] Step 1. Cold cut the pipe and process the bevel, then polish and clean both sides of the bevel with solvent;

[0129] Step 2. Place the welding workpiece on the modified tooling;

[0130] Step 3, replace the air in the pipeline with argon, and perform tack welding;

[0131] Step 4. When welding, argon tungsten arc welding is used for bottom welding, and manual arc welding is used for filling and covering.

[0132] In another embodiment, in the step 4, during welding, ERNiCr-3 is used as welding wire, and ENiCrFe-1 is used as welding rod;

[0133] Rod baking temperature 250°C

[0134] In the first step, the slope deviation of the groove is not greater than 1% of the outer diameter of the pipe.

[0135] The solvent includes acetone or alcohol.

[0136] The bottom welding adopts the direct current connection method, selects the tungsten electrode of Φ2.4mm, the protruding length of the tungsten electrode is 5mm, and the diameter of the nozzle is 12mm.

[0137] The con...

Embodiment 3

[0147] Step 1. Cold cut the pipe and process the bevel, then polish and clean both sides of the bevel with solvent;

[0148] Step 2. Place the welding workpiece on the modified tooling;

[0149] Step 3, replace the air in the pipeline with argon, and perform tack welding;

[0150] Step 4. When welding, argon tungsten arc welding is used for bottom welding, and manual arc welding is used for filling and covering.

[0151] In another embodiment, in the step 4, during welding, ERNiCr-3 is used as welding wire, and ENiCrFe-1 is used as welding rod;

[0152] Rod baking temperature is 225°C

[0153] In the first step, the slope deviation of the groove is not greater than 1% of the outer diameter of the pipe.

[0154] The solvent includes acetone or alcohol.

[0155] The bottom welding adopts the direct current connection method, selects the tungsten electrode of Φ2.4mm, the protruding length of the tungsten electrode is 4mm, and the diameter of the nozzle is 12mm.

[0156] The ...

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Abstract

The invention discloses a welding method of a nickel-based material pipeline. The welding method comprises the steps that first, the pipeline is subjected to cold cutting, a groove is machined, and then the two sides of the groove are polished and cleaned through a solvent; second, a welding workpiece is placed on a refitting tool; third, air in the pipeline is replaced with argon, and positionedwelding is conducted; and fourth, during welding, argon tungsten-arc welding backing weld and manual arc welding are adopted for filling and capping. According to the welding method of the nickel-based material pipeline, the welding quality of a nickel-based alloy material is improved by adopting argon tungsten-arc welding backing weld and manual arc welding for capping.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for nickel-based material pipelines. Background technique [0002] In recent years, N06600 nickel-based alloy materials have been widely used in many fields such as chemistry, petroleum, metallurgy, and aerospace. It is characterized by high melting point, heat resistance, corrosion resistance, high strength, good oxidation resistance, mechanical properties and processing properties; with the good operation of my country's macroeconomic environment and industrial development situation, as my country's related enterprises continue to introduce foreign countries The advanced production equipment and supporting technology have driven the prosperity and development of the nickel-based alloy industry market. As a new generation of alloy materials, it is gradually showing an upward trend. Nickel-based alloys have unique physical, chemical and corrosion resistance pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235
CPCB23K9/167B23K9/235
Inventor 郭琦方忠新张建军闫许生胡公威崔向超汪晓波刘国军李龙涛刘忠
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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