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Electrode for welding high-strength and high-toughness steel and preparation and application thereof

A high-toughness steel, high-strength technology, applied in the field of high-strength high-toughness steel welding electrodes, can solve problems such as difficult to achieve, low-temperature impact toughness, etc., to achieve increased strength, improved low-temperature impact toughness, good strength and low-temperature impact The effect of toughness

Inactive Publication Date: 2010-12-08
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These electrodes can match the base metal in strength, but their low-temperature impact toughness is relatively low, and most of them can only meet the requirements of low-temperature impact toughness at -30°C and -40°C, and it is difficult to achieve Akv (-60°C)≥ 69J requirements

Method used

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  • Electrode for welding high-strength and high-toughness steel and preparation and application thereof
  • Electrode for welding high-strength and high-toughness steel and preparation and application thereof
  • Electrode for welding high-strength and high-toughness steel and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The weight percent of each component in the low-alloy steel used in welding core in the present embodiment is:

[0027] C: 0.03%, Si: 0.08%, Mn: 0.60%, Ni: 4.0%, S: 0.008%, P: 0.010%, Ti: 0.05%, and the rest is iron.

[0028] The percentage by weight of each component in the drug skin is:

[0029] 40% marble, 20% fluorite, 5% silicon powder, 3% rutile, 5% ferrosilicon, 6% ferromanganese, 3% ferromolybdenum, 0.5% ferrosilicon zirconium, 1% rare earth ferrosilicon, 1% soda ash, magnesium Powder 4%, titanium iron 4%, iron powder 7.5%.

[0030] Prepare welding rods as follows:

[0031] 1) Weigh and mix the components of the drug skin according to the above ratio;

[0032] 2) the mixed component of step 1) gained is bonded with potassium sodium water glass;

[0033] 3) Coating the adhesive obtained in step 2) on a Φ4.0mm welding core to make a Φ6.3mm welding rod.

[0034] The welding rod of this embodiment was used to weld the F690 steel plate under the conditions of ro...

Embodiment 2

[0041] The weight percent of each component in the low-alloy steel used in welding core in the present embodiment is:

[0042] C: 0.03%, Si: 0.08%, Mn: 0.60%, Ni: 4.0%, S: 0.008%, P: 0.010%, Ti: 0.05%, and the rest is iron.

[0043] The percentage by weight of each component in the drug skin is:

[0044]Marble 42%, Fluorite 20%, Silica Powder 7%, Rutile 2%, Ferrosilicon 8%, Ferromanganese 5%, Ferromolybdenum 4%, Ferrosilicon 0.6%, Rare Earth Ferrosilicon 1.5%, Soda Ash 2%, Magnesium Powder 2%, titanium iron 2%, iron powder 3.9%.

[0045] Prepare welding rods as follows:

[0046] 1) Weigh and mix the components of the drug skin according to the above ratio;

[0047] 2) the mixed component of step 1) gained is bonded with potassium sodium water glass;

[0048] 3) Coating the adhesive obtained in step 2) on a Φ4.0mm welding core to make a Φ6.3mm welding rod.

[0049] The welding rod of this embodiment is used to weld the F690 steel plate under the conditions of room temperat...

Embodiment 3

[0056] The weight percent of each component in the low-alloy steel used in welding core in the present embodiment is:

[0057] C: 0.03%, Si: 0.08%, Mn: 0.60%, Ni: 4.0%, S: 0.008%, P: 0.010%, Ti: 0.05%, and the rest is iron.

[0058] The percentage by weight of each component in the drug skin is:

[0059] Marble 45%, Fluorite 20%, Silica Powder 6%, Rutile 3%, Ferrosilicon 6%, Ferromanganese 5%, Ferromolybdenum 3%, Ferrosilicon Zirconium 0.8%, Rare Earth Ferrosilicon 1.4%, Soda Ash 1%, Magnesium Powder 3%, titanium iron 3%, iron powder 2.8%.

[0060] Prepare welding rods as follows:

[0061] 1) Weigh and mix the components of the drug skin according to the above ratio;

[0062] 2) the mixed component of step 1) gained is bonded with potassium sodium water glass;

[0063] 3) Coating the adhesive obtained in step 2) on a Φ4.0mm welding core to make a Φ6.3mm welding rod.

[0064] The welding rod of this embodiment is used to weld the F690 steel plate under the conditions of ro...

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Abstract

The invention discloses an electrode for welding high-strength and high-toughness steel. A deposited metal of the electrode comprises the following chemical components in percentage by weight: 0.04 to 0.08 percent of C, 0.30 to 0.50 percent of Si, 1.0 to 1.7 percent of Mn, 3.0 to 3.5 percent of Ni, less than or equal to 0.010 percent of S, less than or equal to 0.015 percent of P, 0.003 to 0.006 percent of Zr, 0.02 to 0.04 percent of Ti, 0.4 to 0.8 percent of Mo, 0.005 to 0.010 percent of rare earth element, and the balance of Fe, wherein the weight ratio of C to Zr is 8-24:1. The deposited metal of the electrode has high strength ReL of more than or equal to 690MPa and high toughness Akv (-60 DEG C) of more than or equal to 69 J, and the electrode is a super-low hydrogen electrode, and the measured diffusible hydrogen [H] of the deposited metal is 1.8 to 2.2 milliliters per 100 grams by a mercury method.

Description

technical field [0001] The invention relates to an electrode used for welding high-strength and high-toughness steel, as well as its preparation and application. Background technique [0002] With the continuous development of the machinery industry, in order to improve the performance of steel structure products, people's demand for high-strength and high-toughness steel is increasing. Such as: steel for offshore platforms. Offshore platforms are important super-large welded structures used by humans to develop marine resources, supporting various equipment with a total weight of more than hundreds of tons. These usage characteristics determine that steel plates for offshore platforms must have high strength, high toughness, and good weldability. With the development of marine resources development, the ordinary steel for offshore platforms with a yield strength of 360MPa and 400MPa can no longer meet the needs. Increasing the strength is of great significance for reducing...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/362B23K35/40B23K9/00B23K103/04
Inventor 韩海峰马洪峰
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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