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High-tenacity low-hydrogen alkaline welding rod and preparation method thereof

A basic electrode, high toughness technology, applied in the preparation of high toughness low hydrogen basic electrode, the field of high toughness low hydrogen basic electrode, to achieve the effect of good molten pool fluidity, small splash particles, and uniform slag coverage

Inactive Publication Date: 2013-05-08
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-toughness low-hydrogen basic electrode, which solves the problem that the existing electrode needs to preheat high-strength steel before welding and heat treatment after welding

Method used

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  • High-tenacity low-hydrogen alkaline welding rod and preparation method thereof
  • High-tenacity low-hydrogen alkaline welding rod and preparation method thereof
  • High-tenacity low-hydrogen alkaline welding rod and preparation method thereof

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preparation example Construction

[0022] The preparation method of the above-mentioned high-toughness low-hydrogen alkaline electrode, the specific steps are as follows:

[0023] Step 1, weighing 38%-44% of marble, 20%-25% of fluorite, 3%-5% of zircon sand, 1%-5% of ferrosilicon, 10%-15% of ferrosilicon, and Carbon ferromanganese 5%~7%, titanium dioxide 2%~4%, mica 3%~6%, microcrystalline fiber 1.5%~2%, nickel powder 1.2%~1.8%, mixed rare earth 1%~1.5%, above The sum of the weight percentages of each component is 100%. Put the above-mentioned coating material and potassium-sodium mixed water glass in a weight ratio of 3-3.5:1 into the mixer and mix for 10-20 minutes, and then put the mixed medicine powder Put it into a pellet machine and press it into a cylindrical pellet;

[0024] Step 2, put the cylindrical powder ball prepared in step 1 into a press-coating machine, press-coat the cylindrical powder ball on the H08A welding core to make an electrode, put the made electrode into a box furnace at a low tempe...

Embodiment 1

[0039] Step 1, weigh 42g marble, 18g fluorite, 4g titanium dioxide, 3g zircon sand, 13g ferro-titanium, 5g medium carbon ferromanganese, 4g ferrosilicon, 6g mica, 1.5g nickel powder, 1.5g rare earth according to mass percentage , 2g microcrystalline fiber, put above-mentioned coating material and 31g potassium-sodium mixed water glass into the blender and mix for 15min, then put the mixed medicinal powder into a compactor and press into a cylindrical drug mass;

[0040] Step 2, put the cylindrical powder ball prepared in step 1 into a press-coating machine, then press-coat the cylindrical powder ball on the H08A welding core to make an electrode, and finally put the made electrode into a box furnace to The low temperature is 60°C, the drying time is 8 hours, the high temperature is 120°C, 180°C, 250°C and 350°C, respectively, for 1 hour, and the five temperature ranges are gradually heated and dried to obtain a high-toughness low-hydrogen alkaline electrode.

[0041]Use the hi...

Embodiment 2

[0050] Step 1, weigh 43g marble, 20g fluorite, 4g titanium dioxide, 3g zircon sand, 10g ferro-titanium, 6g medium carbon ferromanganese, 3g ferrosilicon, 6g mica, 1.2g nickel powder, 1.8g rare earth according to mass percentage , 2g microcrystalline fiber, put above-mentioned coating material and 29g potassium-sodium mixed water glass together and mix in the mixer for 20min, then put the mixed medicinal powder into a compactor and press into a cylindrical drug mass;

[0051] Step 2, put the cylindrical powder ball prepared in step 1 into a press-coating machine, then press-coat the cylindrical powder ball on the H08A welding core to make an electrode, and finally put the made electrode into a box furnace to The low temperature is 60°C, the drying time is 8 hours, the high temperature is 120°C, 180°C, 250°C and 350°C, respectively, for 1 hour, and the five temperature ranges are gradually heated and dried to obtain a high-toughness low-hydrogen alkaline electrode.

[0052] The ...

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Abstract

The invention discloses a high-tenacity low-hydrogen alkaline welding rod which comprises a coating and a welding core, wherein the coating comprises, by weight, 38%-44% of marble, 20%-25% of fluorite, 3%-5% of zircon sand, 1%-5% of ferrosilicon, 10%-15% of ferrotitanium, 5%-7% of mid-carbon ferromanganese, 2%-4% of titanium dioxide, 3%-6% of mica, 1.5%-2% of microcrystalline fiber, 1.2%-1.8% of nickel powder, and 1%-1.5% of misch metal, wherein sum of weight percentages of all components is 100%. The invention further discloses a preparation method of the high-tenacity low-hydrogen alkaline welding rod. The preparation method of the high-tenacity low-hydrogen alkaline welding rod includes the steps: enabling coating materials and K-Na mixing water glass to be mixed, crushing the mixture into a power ball with a cylindrical shape, putting the power ball into a pressing coating machine, coating the power ball with the cylindrical shape on a H08A welding core to form the welding rod, and then grinding the head and the tail and getting the high-tenacity low-hydrogen alkaline welding rod after drying. When the high-tenacity low-hydrogen alkaline welding rod is used for welding high-strength steel, no preheating is needed before welding, no heat treatment is needed after welding, content of diffusible hydrogen of deposited metal is controlled effectively, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a high-toughness low-hydrogen basic welding rod, and also relates to a preparation method of the high-toughness low-hydrogen basic welding rod. Background technique [0002] With the development of modern industrial technology, the application of high-strength steel is becoming more and more extensive, and its welding problems are becoming more and more prominent. It is well known that the higher the strength of steel, the lower its toughness reserve, and the susceptibility to hydrogen-induced cracking also increases. The existing welding rods used for welding high-strength steel need to preheat the high-strength steel before welding and heat treatment after welding to reduce welding residual stress and diffusible hydrogen in the weld metal, which prolongs the manufacturing cycle, increases costs, and increases Labor intensity of workers. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 张敏席敏敏李继红
Owner XIAN UNIV OF TECH
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