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Hardfacing electrode for shielded metal arc welding for repair of deep-sea trenching plough, and preparation method and use method thereof

A technology of surfacing electrodes and trenching ploughs, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as insufficient hardness of surfacing electrodes, and achieve low maintenance costs, extended overall service life, and excellent wear resistance. Effect

Inactive Publication Date: 2020-11-17
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of insufficient hardness of existing surfacing welding electrodes, the present invention provides a surfacing welding electrode for repairing deep-sea trenching plows

Method used

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  • Hardfacing electrode for shielded metal arc welding for repair of deep-sea trenching plough, and preparation method and use method thereof
  • Hardfacing electrode for shielded metal arc welding for repair of deep-sea trenching plough, and preparation method and use method thereof
  • Hardfacing electrode for shielded metal arc welding for repair of deep-sea trenching plough, and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Table 1: Example 1 sampling mass fraction (Zt%)

[0047]

[0048] A deep-sea furrowing plow repair surfacing welding electrode, its preparation process comprises the following steps:

[0049] (1) Straighten the 1Cr13 martensitic stainless steel welding core with a diameter of 4mm, and use sandpaper to remove rust, clean and decontaminate; (2) Accurately weigh mineral and alloy powders with a balance according to Table 1, and pour them into a mortar at the same time Grinding and dry mixing until the powder has a uniform texture and consistent color; (3) Add water glass to the dry powder for wet mixing in small amounts and several times until the wet powder has a moderate viscosity and a uniform texture. Embodiment 1 preferred water glass modulus 2.9, Baume degree 47-48. (4) Spread the wet powder concentrically on the surface of the welding core, control the thickness to 2-3mm, and maintain good concentricity. (5) At room temperature, place the electrode vertically t...

Embodiment 2

[0055] Table 2: Example 2 sampling mass fraction (Zt%)

[0056]

[0057] A deep-sea furrowing plow repair surfacing welding electrode, its preparation process comprises the following steps:

[0058] (1) Straighten the 1Cr13 martensitic stainless steel welding core with a diameter of 4 mm, and use sandpaper to remove rust, clean and decontaminate; (2) Accurately weigh mineral and alloy powders with a balance according to Table 2, and pour them into a mortar at the same time Grinding and dry mixing until the powder has a uniform texture and consistent color; (3) Add water glass to the dry powder for wet mixing in small amounts and several times until the wet powder has a moderate viscosity and a uniform texture. Embodiment 1 preferred water glass modulus 2.9, Baume degree 47-48. (4) Spread the wet powder concentrically on the surface of the welding core, control the thickness to 2-3mm, and maintain good concentricity. (5) At room temperature, place the electrode vertically to...

Embodiment 3

[0064] Table 3: Example 3 sampling mass fraction (Zt%)

[0065]

[0066] A deep-sea furrowing plow repair surfacing welding electrode, its preparation process comprises the following steps:

[0067] (1) Straighten the 1Cr13 martensitic stainless steel welding core with a diameter of 4 mm, and use sandpaper to remove rust, clean and decontaminate; (2) Accurately weigh mineral and alloy powders with a balance according to Table 2, and pour them into a mortar at the same time Grinding and dry mixing until the powder has a uniform texture and consistent color; (3) Add water glass to the dry powder for wet mixing in small amounts and several times until the wet powder has a moderate viscosity and a uniform texture. Embodiment 1 preferred water glass modulus 3.0, Baume degree 47-48. (4) Spread the wet powder concentrically on the surface of the welding core, control the thickness to 2-3mm, and maintain good concentricity. (5) At room temperature, place the electrode vertically ...

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Abstract

The invention relates to a hardfacing electrode for shielded metal arc welding for repair of a deep-sea trenching plough. The hardfacing electrode comprises a core wire and a coating, and the periphery of the core wire is coated with the coating; the core wire is made of martensitic stainless steel, and the coating comprises the following components by mass: 45-55 parts of marble; 20-30 parts of fluorite; 5-20 parts of ferrotitanium; 4-8 parts of titanium dioxide; 3-5 parts of zircon sand; 3-5 parts of potassium feldspar; and 3-6 parts of rare earth silicon. According to the hardfacing electrode, 1Cr13 martensitic stainless steel is used as the core wire; the rare earth silicon and the ferrotitanium are added to the low-hydrogen alkaline coating, and the contents of the rare earth siliconand the ferrotitanium are controlled; and finally the hardfacing electrode is high in hardness and abrasion resistance during hardfacing repair of the trenching plough.

Description

technical field [0001] The invention relates to a welding rod, in particular to a surfacing welding rod for repairing a deep-sea trenching plow and a preparation method and use method thereof. Background technique [0002] The subsea trenching machine is mainly used for pre-digging trenches for the laying of submarine pipelines, and is widely used in construction projects such as subsea oil and gas, communication optical cables, etc. The trenching plow is one of the most important functional actuators of the subsea trenching machine. Its main function is to cut the sediment on the seabed and form a deep trench for pipe laying, so the working conditions in service are quite harsh. Not only has it endured the friction of fine sand and pebbles on the seabed for a long time, but it also occasionally suffers from the impact of huge rocks, which gradually produce grinding holes and grinding pits on the plowshares, and eventually lead to the failure of the furrowing plow. Usually ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/36B23K35/365B23K35/40
CPCB23K35/3053B23K35/3602B23K35/365B23K35/40
Inventor 杨可刘思沾包晔峰
Owner HOHAI UNIV CHANGZHOU
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