High-strength steel welding rod for hydroelectric engineering and preparation method for high-strength steel welding rod

A technology for hydropower engineering and high-strength steel, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problem that the strength level cannot be reached, the strength requirements of steel used in hydropower engineering, the tensile strength of chrome molybdenum hydrogen steel electrodes, Yield strength vertical welding large line energy impact requirements do not meet technical requirements and other problems, to achieve good welding process performance, improve the overall performance of the weld, and the effect of arc stability

Active Publication Date: 2018-04-20
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the above-mentioned three patents are used for the welding of 930MPa grade hydropower engineering steel, there are following defects: its tensile strength Rm (MPa) of open welding rod among CN104096986A: 620-735, yield strength Rp0.2 (MPa): ≥ 540, Can not reach the steel strength requirement of hydropower engineering; Disclose its tensile strength, yield strength, vertical welding large line energy impact requirement of chromium-molybdenum hydrogen-prone steel welding rod in CN105234593A and all do not meet 930MPa and hydropower engineering steel technical requirement; CN106271224A discloses high strength and high toughness The strength level of the welding rod is lower than that of 930MPa grade hydropower engineering steel, and it cannot reach its strength level

Method used

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  • High-strength steel welding rod for hydroelectric engineering and preparation method for high-strength steel welding rod
  • High-strength steel welding rod for hydroelectric engineering and preparation method for high-strength steel welding rod
  • High-strength steel welding rod for hydroelectric engineering and preparation method for high-strength steel welding rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A low-alloy high-strength steel electrode for hydropower engineering according to the present invention needs to strictly control the content of impurity elements in the deposited metal. The electrode is produced by using a rod wire that meets the following composition requirements, and the alkaline slag system is used to ensure that the deposited metal is obtained. mechanical properties.

[0046] Take the coating, and the components and parts by mass of the coating are as follows:

[0047] Marble 9.5kg, fluorite 4.5kg, rutile 1.5kg, silicon micropowder 1.5kg, metal manganese 1.125kg, ferrosilicon 0.85kg, ferromolybdenum 0.6kg, graphite 0.025kg, metal chromium 0.05kg, iron powder 0.625kg, soda ash 0.1kg , sodium alginate 0.1kg, CMC 0.1kg, boron iron 0.1kg, nickel powder 1.7kg.

[0048] Mix the components of the above-mentioned drug skin evenly, add water glass with a potassium-sodium ratio of 1:1 at 20°C, which accounts for 21.6% of the total mass content of the drug p...

Embodiment 2

[0058] Take the coating, and the components and parts by mass of the coating are as follows:

[0059] 10.5kg of marble, 4.5kg of fluorite, 1.25kg of rutile, 1.0kg of silicon micropowder, 1.05kg of manganese metal, 0.75kg of ferrosilicon, 0.9kg of ferromolybdenum, 0.05kg of graphite, 0.50kg of metal chromium, 0.70kg of iron powder, and 0.1kg of soda ash , sodium alginate 0.2kg, CMC 0.2kg, boron iron 0.05kg, nickel powder 1.75kg.

[0060] Mix the components of the above-mentioned drug skin evenly, add water glass with a potassium-sodium ratio of 1:1 at 20°C, which accounts for 21.6% of the total mass content of the drug powder, and the Baume concentration is 41.3-41.7°Be, and carry out 10-15min. Stir. It is wrapped on the welding core on the hydraulic welding rod production equipment by conventional technology. Then bake at a low temperature of 85°C for 3.5-4 hours, and at a high temperature of 380°C for 1.5 hours, and it is ready.

[0061] The welding rod (DC reverse connect...

Embodiment 3

[0069] Take the coating, and the components and parts by mass of the coating are as follows:

[0070] 10.5kg of marble, 4.5kg of fluorite, 1.25kg of rutile, 1.0kg of silicon micropowder, 1.05kg of manganese metal, 0.75kg of ferrosilicon, 0.75kg of ferromolybdenum, 0.05kg of graphite, 0.45kg of metal chromium, 0.9kg of iron powder, and 0.1kg of soda ash , sodium alginate 0.2kg, CMC 0.2kg, boron iron 0.05kg, nickel powder 1.80kg.

[0071] Mix the components of the above-mentioned drug skin evenly, add water glass with a potassium-sodium ratio of 1:1 at 20°C, which accounts for 21.6% of the total mass content of the drug powder, and the Baume concentration is 41.3-41.7°Be, and carry out 10-15min. Stir. It is wrapped on the welding core on the hydraulic welding rod production equipment by conventional technology. Then bake at a low temperature of 85°C for 3.5-4 hours, and at a high temperature of 380°C for 1.5 hours, and it is ready.

[0072] The welding rod (DC reverse connect...

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Abstract

The invention discloses a high-strength steel welding rod for hydroelectric engineering and a preparation method for the high-strength steel welding rod. The high-strength steel welding rod comprisesa welding core and a coating coated on the surface of the welding core, the coating comprises the following ingredients of, by weight, 9.5-10.5 parts of marble, 4.25-5 parts of fluorite, 1.5-2 parts of rutile, 1.5-2 parts of silica powder, 1-1.5 parts of manganese metal, 0.8-1.05 parts of silicon iron, 0.6-0.675 part of ferromolybdenum, 0.025-0.05 part of graphite, 0.05-0.50 part of chromium metal, 0.625-0.675 part of iron powder, 0.1-0.15 part of sodium carbonate, 0.1-0.15 part of sodium alga acid, 0.1-0.15 part of CMC, 0.05-0.075 part of ferroboron and 1.7-1.9 parts of nickel powder. By means of the high-strength steel welding rod for hydroelectric engineering and the preparation method for the high-strength steel welding rod, when welding is performed, an electric arc is stable, spatteris small, slag-removal is well performed, molding is good, whole position operation performance is good, vertical welding position strength in welding deposited metal reaches standard requirements, and the impact toughness of the deposited metal is larger than or equal to 47 J at the temperature of -40 DEG C.

Description

technical field [0001] The invention relates to the technical field of welding material preparation, and more specifically relates to a high-strength steel welding rod for hydropower engineering and a preparation method thereof. Background technique [0002] With the development of my country's hydropower industry, more and more hydropower stations with high loading capacity and large input volume have been built. At present, there are more than 30 large-scale hydropower stations that have been or will be built on the main streams of the upper and middle reaches of the Yangtze River and in the Jinsha River and other river basins. In order to meet the overall layout of the hydropower station and reduce the overall cost of the project, research on new welding materials will become one of the important directions. [0003] In recent years, 80KG high-strength steel welding consumables have been widely used, and higher-level high-strength steel welding consumables will also be g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/36B23K35/40
CPCB23K35/0261B23K35/3073B23K35/3602B23K35/404
Inventor 张克静蒋勇张晓柏陈维富朱宇霆
Owner ATLANTIC CHINA WELDING CONSUMABLES
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