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A kind of welding rod for high-strength steel welding and its preparation method and application

A high-strength steel and welding rod technology, applied in welding equipment, welding media, welding/cutting media/materials, etc., can solve the problems of long construction period, slow progress, increased manufacturing cost, etc., and achieve small diameter, good comprehensive performance of strength and toughness , the effect of good crack resistance

Active Publication Date: 2018-03-16
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the progress in supporting welding materials for such high-strength offshore platform steel is slow, and the country has not been able to develop matching welding materials in time, and most of them rely on imported welding materials, resulting in increased manufacturing costs and longer construction cycles

Method used

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  • A kind of welding rod for high-strength steel welding and its preparation method and application
  • A kind of welding rod for high-strength steel welding and its preparation method and application
  • A kind of welding rod for high-strength steel welding and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment specifically provides an electrode for high-strength steel welding, including a welding core and a coating, and the coating is composed of the following components in weight percentage: marble (CaCO 3 ): 34%, Fluorite (CaF 2 ): 14%, rutile (TiO 2 ): 9%, microsilica powder (SiO 2 ): 8%, electrolytic manganese (Mn): 7%, ferrosilicon (Si-Fe): 10%, nickel powder (Ni): 4.5%, molybdenum iron (Mo-Fe): 2.5%, graphite (C): 0.5%, soda ash (Na 2 CO 3 ): 1.0%, microcrystalline cellulose (CMC): 1.0%, rare earth metal (Re): 1.0%, and the balance is iron powder and unavoidable impurities.

[0033] Among them, the welding core is H08T carbon steel core with low S and P content, and its chemical composition accounts for the weight percentage of welding core: C: 0.071%, Si: 0.11%, Mn: 0.42%, S: 0.004%, P: 0.005 %, the rest is iron.

[0034] Prepare welding rods as follows:

[0035] 1) Weigh the components of the drug skin according to the above amounts and mix them...

Embodiment 2

[0043] This embodiment specifically provides an electrode for high-strength steel welding, including a welding core and a coating, and the coating is composed of the following components in weight percentage: marble (CaCO 3 ): 42%, fluorite (CaF 2 ): 18%, rutile (TiO 2 ): 7%, silicon powder (SiO 2 ): 4%, electrolytic manganese (Mn): 5%, ferrosilicon (Si-Fe): 6%, nickel powder (Ni): 7%, molybdenum iron (Mo-Fe): 1.3%, graphite (C): 0.3%, soda ash (Na 2 CO 3 ): 2%, microcrystalline cellulose (CMC): 0.5%, rare earth metal oxide (ReO): 1.5%, and the balance is iron powder and unavoidable impurities.

[0044] Among them, the welding core is H08T carbon steel core with low S and P content, and its chemical composition accounts for the weight percentage of welding core: C: 0.071%, Si: 0.11%, Mn: 0.42%, S: 0.004%, P: 0.005 %, the rest is iron.

[0045] Prepare welding rods as follows:

[0046] 1) Weigh the components of the drug skin according to the above amounts and mix them e...

Embodiment 3

[0054] This embodiment specifically provides an electrode for high-strength steel welding, including a welding core and a coating, and the coating is composed of the following components in weight percentage: marble (CaCO 3 ): 48%, fluorite (CaF 2 ): 23%, rutile (TiO 2 ): 4%, silicon powder (SiO 2 ): 6%, electrolytic manganese (Mn): 2%, ferrosilicon (Si-Fe): 4%, nickel powder (Ni): 2%, molybdenum iron (Mo-Fe): 0.5%, graphite (C): 0.1%, soda ash (Na 2 CO 3 ): 1.5%, microcrystalline cellulose (CMC): 0.5%, rare earth metal oxide (ReO): 2%, and the balance is iron powder and unavoidable impurities.

[0055] Among them, the welding core is H08T carbon steel core with low S and P content, and its chemical composition accounts for the weight percentage of welding core: C: 0.071%, Si: 0.11%, Mn: 0.42%, S: 0.004%, P: 0.005 %, the rest is iron.

[0056] Prepare welding rods as follows:

[0057] 1) Weigh the components of the drug skin according to the above amounts and mix them e...

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PUM

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Abstract

The invention provides an electrode for high-strength steel welding. The electrode comprises a welding core and a coating. The coating is composed of, by weight, 34%-48% of CaCO3, 13%-23% of CaF2, 4%-9% of TiO2, 4%-8% of SiO2, 2%-7% of Mn, 4%-10% of Si-Fe, 2%-7% of Ni, 0.5%-2.5% of Mo-Fe, 0.1%-0.8% of C, 0.5%-2% of Na2CO3, 0.5%-2% of CMC, 1%-2% of rare earth metal or oxides thereof and the balance iron power and unavoidable impurities. A CaO-CaF2-TiO2-SiO2 type basic slag system is adopted, alloying element transition and removal of harmful impurities such as O, N, S and P can be facilitated, the welding process property and mechanical property of the electrode are good, and the demand for 460MPa high-strength steel welding is met; the yield strength of deposited metal is larger than or equal to 500MPa, the tensile strength is larger than or equal to 600MPa, and Charpy impact KV2 (minus 40 DEG C) of the deposited metal is larger than or equal to 100J; the content of diffusible hydrogen of the deposited metal of the electrode reaches the level of ultra-low hydrogen.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a welding rod for high-strength steel welding and its preparation method and application, which can be applied to the welding of matching materials for offshore platform structural steel. Background technique [0002] At present, in order to reduce the weight and manufacturing cost of offshore platforms in marine structures, it is necessary to minimize the use of steel and optimize the structural design. Therefore, the strength level of steel will be higher and higher, and the thickness of the material will also increase. The yield strength exceeds 460MPa EQ47, EQ56, EQ70 and other steel grades use more than 40%. [0003] However, the use of high-strength and large-thickness materials poses a greater challenge to welding technology. It is required that the selected welding materials not only have good welding performance, but also have good welding performan...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/40
Inventor 黄会强张亚平刘玉双杨恒闯田海成李磊韩海峰张伟李振
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD