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Consumable electrode nickel base alloy anti-corrosion surfacing protection gas and surfacing method

A nickel-based alloy and shielding gas technology, applied in welding medium, welding equipment, metal processing, etc., can solve the problems of high metal surface tension, affecting the use of pipe fittings, high viscosity and other problems, so as to achieve good weld formation, prevent oxidation, The effect of improving quality

Inactive Publication Date: 2014-12-03
SICHUAN GASOLINEEUM CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the process of surfacing welding, due to the high surface tension of nickel and nickel-based alloy weld metal, poor fluidity, high viscosity, difficulty in forming and easy oxidation, the welding quality is poor, and the formed weld is generally convex. For small diameter For pipe fittings, convex welds affect the use of pipe fittings, and even cannot be used

Method used

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  • Consumable electrode nickel base alloy anti-corrosion surfacing protection gas and surfacing method
  • Consumable electrode nickel base alloy anti-corrosion surfacing protection gas and surfacing method
  • Consumable electrode nickel base alloy anti-corrosion surfacing protection gas and surfacing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The protective gas for corrosion-resistant surfacing welding of molten nickel-based alloys in this embodiment is composed of 90% argon and 10% helium by volume. The schematic diagram after welding in this embodiment is as follows figure 1 As shown, keep the gas flow of argon at 20-25 L / min during welding. It can be seen from the appearance that the weld seam is uniform and smooth, and the protective gas composed of this component is used for welding, and the appearance effect of the welding is good, which meets the process requirements.

[0036] Bending test is carried out after welding, the table of bending test is shown in the table below:

[0037]

[0038] Then analyze the chemical composition (%) of the deposited metal for corrosion-resistant surfacing, and the analysis results are shown in the following table:

[0039]

[0040] It can be seen from the table analysis that the chemical composition of the metal after welding can meet the actual requirements.

...

Embodiment 2

[0043] The shielding gas for corrosion-resistant surfacing welding of nickel-based alloys in this embodiment is composed of 95% argon and 5% helium by volume. The schematic diagram after welding in this embodiment is as follows figure 1 As shown, keep the gas flow of argon at 20-25 L / min during welding. It can be seen from the appearance that the shielding gas composed of this component is used for welding, and the appearance of the welding is good, which meets the process requirements. The bending test and metal chemical composition analysis all meet the requirements.

[0044]

[0045] Implementation three

[0046] The protective gas used is composed of 80% argon and 20% helium by volume. The schematic diagram after welding in this embodiment is as follows figure 2 As shown, keep the gas flow of argon at 20-25 L / min during welding. It can be seen from the appearance that if the shielding gas composed of this component is used for welding, the appearance of welding is p...

Embodiment 4

[0056] The protective gas used is composed of 99% argon and 1% helium by volume. The schematic diagram after welding in this embodiment is as follows image 3 As shown, keep the gas flow of argon at 20-25 L / min during welding. It can be seen from the appearance that the shielding gas composed of this component is used for welding, and the welding appearance is poor, which cannot meet the process requirements.

[0057] Perform a bending test after welding, and the bending test is shown in the table below:

[0058]

[0059] The bending test meets the process requirements.

[0060] After welding, the metal chemical composition (%) analysis is carried out, and the analysis results are shown in the following table:

[0061]

[0062] Can not meet the actual needs.

[0063] The chemical composition analysis of the metal after welding in this embodiment cannot meet the actual needs and requirements, and cannot meet the process conditions.

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Abstract

The invention discloses a consumable electrode nickel base alloy anti-corrosion surfacing protection gas and a surfacing method and aims to solve the problem that existing surfacing welding is not applicable to small-bore pipe fittings due to the fact that existing surfacing welding is poor in quality and weld lines are protruded. The protection gas consists of, by volume, 90% to 95% of argon and 5% to 10% of helium. According to the consumable electrode nickel base alloy anti-corrosion surfacing protection gas and the surfacing method, mobility of a weld pool can be changed, weld beads are prevented from being oxidized, and chemical components of welding layers are guaranteed, so that welding qualities are improved; meanwhile, the weld beads are not protruded; smoothness of the weld beads and pipe walls is kept, and welding requirements of the small-bore pipe fittings can be met.

Description

technical field [0001] The invention relates to the field of welding, in particular to a protective gas for corrosion-resistant surfacing welding of a molten nickel-based alloy and a method for corrosion-resistant surfacing welding of a molten nickel-based alloy. Background technique [0002] With the vigorous development of the petroleum industry and the implementation of my country's strategic petroleum reserve project. The project schedule is tight, the working environment in the device is harsh, the requirements for corrosion-resistant surfacing welding on the inner wall of the pipe fittings are getting higher and higher, and the demand in various projects is also increasing. The most important thing is that the welding quality directly affects the quality of the entire project. Require. [0003] For small-diameter pipe fittings, due to the limitation of the pipe diameter, only the open arc surfacing method can be used, two butt welding methods: gas metal arc welding (G...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/04
CPCB23K9/173B23K9/048B23K35/383B23K2101/06
Inventor 陈中均韦开棣李晓亮陈轩周鑫秦涛郭有田
Owner SICHUAN GASOLINEEUM CONSTR ENG