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Acidic coating super two-phase stainless steel electrode

A technology of duplex stainless steel and coating, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of difficult ferrite-austenite phase structure ratio, high manufacturing difficulty and high strength. Achieve the effect of excellent pitting resistance, excellent mechanical properties and excellent operating performance

Inactive Publication Date: 2010-06-02
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, super duplex stainless steel has been widely used in my country's engineering construction. Due to the high strength of super duplex stainless steel welding materials, it is difficult to control the appropriate ferrite-austenite phase structure ratio, and it is very difficult to manufacture. Matching manual welding rod with excellent welding process performance

Method used

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  • Acidic coating super two-phase stainless steel electrode
  • Acidic coating super two-phase stainless steel electrode
  • Acidic coating super two-phase stainless steel electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The mass percentages of electrode coating composition and content are: rutile 35, potassium feldspar 20, marble 6, phlogopite 1.5, titanium dioxide 5, molybdenum iron 2, metal manganese 2, metal chromium 18, cryolite 2, fluoride rare earth 1.5 , Soda Ash 1.0, Chrome Green 6.

Embodiment 2

[0022] The mass percentages of electrode coating composition and content are: rutile 37, potassium feldspar 17, marble 5, phlogopite 3, titanium dioxide 7, molybdenum iron 3.5, metal manganese 3, metal chromium 13, cryolite 2.5, fluoride rare earth 0.5 , soda ash 0.5, chrome green 8.

Embodiment 3

[0024] The mass percentages of electrode coating composition and content are: rutile 40, potassium feldspar 15, marble 10, phlogopite 1, titanium dioxide 3, molybdenum iron 1.5, metal manganese 3.5, metal chromium 16.5, cryolite 3, fluoride rare earth 1 , soda ash 0.5, chrome green 5.

[0025] Example 2 Effect

[0026] Chemical composition of deposited metal %

[0027]

[0028] Ferrite content in weld metal %

[0029]

[0030] Deposited Metal Mechanical Properties

[0031]

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Abstract

The invention relates to an acidic coating super duplex stainless steel welding rod and belongs to welding material technology. The invention adopts 2507 duplex stainless steel wires as the welding core; the components and the weight percentages of the components of the welding rod coating are as follows: 30-40 of rutile, 3-7 of titanium dioxide, 15-20 of potash feldspar, 1-3 of phlogopite, 5-10 of marble, 16-20 of metal powder, 0.5-1.5 of rare earth fluoride, 2-3 of cryolite, 5-8 of chrome green, 0.5-1.0 of soda, and 1.5-3.5 of ferroalloy. The welding rod of the invention has the advantages, showed by the test results of manufacturability, metallographic observation, mechanical property and corrosion resistance, that the welding rod has extremely good welding technical property; electric arc is stable during welding, and spattering does not basically exist; the formation of weld joints is good; slag detachability is good; the manipulability of the welding rod is excellent; through metallographic observation, the content of ferrite in the structure of welding joints ranges from 40 percent to 60 percent, and the phase ratio can meet engineering application requirement; the weldedwelding joint has excellent mechanical property, and tensile strength can be more than 800 MPa; low temperature toughness is good; the stress corrosion resistance and pitting corrosion resistance of the welding joint are excellent.

Description

technical field [0001] The invention belongs to welding material technology, and mainly relates to an acid-coated super duplex stainless steel welding rod. Background technique [0002] Super duplex stainless steel has high strength, good toughness and excellent corrosion resistance, especially excellent in chloride stress corrosion resistance and pitting corrosion resistance, and also has excellent welding performance. Super duplex stainless steel has been widely used in the construction of corrosion-resistant pressure vessels and pipelines, large chemical tankers, and offshore construction facilities. At present, super duplex stainless steel has been widely used in my country's engineering construction. Due to the high strength of super duplex stainless steel welding materials, it is difficult to control the appropriate ferrite-austenite phase structure ratio, and it is very difficult to manufacture. Matching manual welding rod with excellent welding process performance. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/22
Inventor 王君民王明林郭敬杰吴伦发
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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