High-toughness low-hydrogen basic welding rod and preparation method thereof

A basic welding rod and high toughness technology, which is applied in the field of preparation of high toughness low hydrogen basic welding rod and high toughness low hydrogen basic welding rod, and achieves the effects of fine and beautiful welding seam formation, uniform slag coverage and good arc stability.

Inactive Publication Date: 2016-01-27
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-toughness low-hydrogen basic welding rod and preparation method thereof
  • High-toughness low-hydrogen basic welding rod and preparation method thereof
  • High-toughness low-hydrogen basic 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 pressure 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...

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-toughness low-hydrogen alkaline electrode, which includes a coating and a welding core. The coating is composed of the following materials in percentage by weight: 38%-44% of marble, 20%-25% of fluorite, and 3% of zircon sand %~5%, ferrosilicon 1%~5%, ferrotitanium 10%~15%, medium 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%, the sum of the weight percentages of the above components is 100%. The invention also discloses its preparation method. After the coating material is mixed with potassium sodium mixed water glass, it is pressed into a cylindrical powder and put into a pressure coating machine, and the cylindrical powder is pressure-coated on the H08A welding core to make an electrode. , and then grind the head and tail and then dry it. The invention does not need preheating before welding and heat treatment after welding when welding high-strength steel, effectively controls the diffusible hydrogen content of deposited metal, and has a simple preparation method.

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 Patents(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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