A nickel-based electrode for AC welding

A nickel-based electrode and high-nickel technology, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve arc stability and poor slag coverage, poor weld shape, low content of diffusible hydrogen, etc. problems, to achieve the effect of smooth electrode surface, good slag detachability, and excellent thermal crack resistance

Inactive Publication Date: 2011-12-21
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This coating type electrode has good slag removal and low diffusible hydrogen content, but the arc stability and slag coverage are poor, the weld shape is not good, and the weld bead is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]The coating used in the electrode of the present invention is mainly carbonate, fluoride and alloy, and a small amount of silicate and pressure-improving substances are added at the same time. The components and their mass parts are as follows: marble: 40, potassium titanate: 5, fluorite: 28, barium fluoride 2, bentonite: 3, zircon sand: 1, soda ash 2, manganese metal: 1, ferrosilicon : 7, aluminum-magnesium alloy: 1, barium carbonate 10.

[0032] The deposited metal composition is: C: 0.034%, S: 0.004%, P: 0.01%, Si: 0.03%, Mn: 1%, Fe: 7.8%, W: 2.7%, Mo: 18.8%, and the balance is Ni .

[0033] After mixing the raw materials of the coating above evenly, add potassium-sodium water glass of 43-48 Be at 20°C, accounting for 23-28% of the mass content of the solid component, for wet mixing. Nickel alloy welding wire is used as the welding core, and the welding rod is prepared on the hydraulic welding rod production equipment by conventional technology.

Embodiment 2

[0035] Others are the same as in Example 1, but the composition in parts by mass of the coating is as follows: marble: 46, potassium titanate: 3, fluorite: 23, barium fluoride 5, bentonite: 2, zircon sand: 2, soda ash 1.5, metal Manganese: 1.5, ferrosilicon: 4, aluminum-magnesium alloy: 4, barium carbonate 8.

Embodiment 3

[0037] Others are the same as in Example 1, but the composition of the coating is as follows: marble: 50, potassium titanate: 2, fluorite: 20, barium fluoride 7, bentonite: 1.5, zircon sand: 3, soda ash 1, metal Manganese: 3, ferrosilicon: 3, aluminum-magnesium alloy: 2.5, barium carbonate 7.

[0038] During AC welding, the electrodes of Examples 1-3 have stable arc, basically no spatter, good slag detachability, and excellent operation performance of the electrode; the shape of the weld seam is beautiful, and the height of the weld bead is moderate. The mechanical properties of deposited metal are: R P0.2 : 515Mpa, Rm: 765Mpa, A: 37.5%, Z: 41.5%, A at -196°C KV : 102J. The foreign ENi1008 electrode is AC welding, but its slag coverage is not good, and the price is very high; abroad, only Japan Kobelco provides an example value, and its -196°C impact value is 83J, while the average -196°C impact value of this example reaches 102J outperformed it by 22%.

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PUM

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Abstract

The present invention relates to a technology in the field of welding materials, especially a nickel-based electrode for AC welding. The electrode uses a high-nickel alloy welding wire that meets the requirements of GB / T13814-2008 on the composition of ENi1008 as the welding core. The coating composition is: marble: 40-50%, potassium titanate: 2-5%, fluorite: 20-28%, barium fluoride: 2-7%, bentonite: 1.5-3%, zircon sand: 1-3%, soda ash: 1 ~2%, metal manganese: 1~3%, ferrosilicon containing Si43.0~47.0% 3~7%, magnesium alloy containing Al47~53%: 1~3%, barium carbonate: 7~10%. The welding rod of the invention has stable electric arc, basically no spatter, good slag removal performance, excellent operation performance of the welding rod, beautiful welding seam shape and moderate welding seam infiltration angle.

Description

technical field [0001] The invention relates to a technology in the field of welding materials, in particular to a nickel-based welding rod for AC welding. Background technique [0002] With the development of industry, the application of 9% Ni steel is more and more extensive. 9% Ni steel is a low-carbon martensitic low-temperature steel with good low-temperature toughness, good welding performance and other special properties. For example, it is used as a non-magnetic steel in superconducting engineering and nuclear fusion engineering. At present, 9% Ni steel is mainly used as steel for liquefied natural gas or liquid nitrogen cryogenic vessels and is widely used by countries all over the world. [0003] As the application range of 9% Ni steel becomes wider and wider, the demand for supporting welding materials for 9% Ni steel is increasing. There are three main types of supporting welding materials for 9% Ni steel: [0004] (1) Inconel type with a Ni content of about 6...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36
Inventor 黄连涛刘鹏飞张晓吴伦发
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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