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A kind of low-carbon and low-silicon vertical downward electrode and preparation method thereof

A low-carbon, low-silicon, vertical-down technology, applied in the direction of welding equipment, welding medium, manufacturing tools, etc., can solve the problems of not meeting the requirements of corrosion-resistant steel, not suitable for galvanized pot welding, and the existence of welding cracks, etc., to achieve good Resistance to molten zinc corrosion, improved welding efficiency, and stable arc

Inactive Publication Date: 2017-04-19
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shenyang University of Technology has developed a special welding wire using 08Cu base material for direct drawing. Although it has good resistance to zinc liquid corrosion, there are hidden dangers of welding cracks.
[0003] In summary, there is a big difference between the existing welding rod and the newly developed zinc liquid corrosion-resistant steel plate, which cannot meet the requirements of corrosion-resistant steel and is not suitable for welding galvanized pots

Method used

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  • A kind of low-carbon and low-silicon vertical downward electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The coating (mass fraction) used is: microcrystalline cellulose: 25%, wood flour: 8%, hydroxymethyl cellulose: 8%, ilmenite: 18%, marble: 9%, low-carbon ferromanganese: 8%, ferro-titanium: 3.5%, aluminum powder: 4.5%, dolomite: 10%; Cr 2 O 3 : 3%, ZrO 2 : 3%.

[0018] The chemical composition (mass fraction) of the electrode steel is C: 0.02%, Si: 0.02%, Mn: 0.40%, P: 0.008%, S: 0.0008%, Alt: 0.035%, the rest is Fe and unavoidable impurities.

[0019] Preparation method: First, draw the special welding rod steel into a welding core, then mix the above coating components evenly, add sodium-potassium mixed water glass, stir and evenly press coating on the surface of the special welding core to make a diameter of 2.0-8.0mm, Electrodes with a length of 250-450mm are dried at room temperature and then dried at 220°C for 2 hours.

Embodiment 2

[0021] The formula (mass fraction) used for the coating is: microcrystalline cellulose: 20%, wood flour: 10%, hydroxymethyl cellulose: 10%, ilmenite: 20%, marble: 8%, low-carbon ferromanganese : 8%, ferro-titanium: 3%, aluminum powder: 3%, dolomite: 10%, Cr 2 O 3 : 3%, ZrO 2 :5%.

[0022] The chemical composition (mass fraction) of the electrode steel is C: 0.01%, Si: 0.01%, Mn: 0.60%, P: 0.007%, S: 0.0003%, Alt: 0.038%, and the rest is Fe and unavoidable impurities.

[0023] The preparation method is the same as in Example 1.

Embodiment 3

[0025] The coating formula (mass fraction) used is: microcrystalline cellulose: 22%, wood flour: 11%, hydroxymethyl cellulose: 9%, ilmenite: 16%, marble: 8%, low-carbon ferromanganese : 7%, ferro-titanium: 5%, aluminum powder: 3%, dolomite: 12%, Cr 2 O 3 : 3%, ZrO 2 : 4%.

[0026] The chemical composition (mass fraction) of the electrode steel is: C: 0.01%, Si: 0.01%, Mn: 0.55%, P: 0.005%, S: 0.001%, Alt: 0.035%, the rest is Fe and unavoidable impurities .

[0027] The preparation method is the same as in Example 1.

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Abstract

The invention belongs to the technical field of welding and particularly relates to a low carbon, low silicon and vertically downward electric welding rod. The electric welding rode is used for manufacturing a galvanized pot and matched with a dedicated steel plate. The welding rod is a high-cellulose type welding rod. A coating comprises, by mass, 20-25% of microcrystalline cellulose, 8-11% of wood powder, 8-10% of hydroxymethyl cellulose, 15-20% of ilmenite, 8-10% of marble, 5-8% of low-carbon ferromanganese, 3-5% of ferrotitanium, 3-5% of aluminite powder, 10-15% of dolomite, 3-5% of C<r>2O3 and 3-4% of Z<r>O2. The core wire composition design of the welding rod is reasonable, the C content and the Si content are extremely low, the core wire composition is consistent with a base material, the cellulose type is adopted in the coating, the electric arc is large in blowing force, the electric arc is stable in the welding process, the quantity of generated slag is low, the weld formation is good, and the welding rod is applicable to the vertically downward operation. Meanwhile, the Si composition added in the coating is greatly decreased, the Si content in the weld is not increased, the good liquid-zinc-corrosion resistant performance is achieved, and meanwhile the weld is made to have good mechanical properties.

Description

Technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a low-carbon low-silicon vertical downward welding electrode and a preparation method. Background technique [0002] At present, hot-dip galvanizing products are widely used in many fields. In the hot-dip galvanizing process, the galvanizing pot is the most critical equipment. In order to resist the strong corrosion of high-temperature molten zinc, the galvanizing pot is mostly made of low carbon and low silicon type. It is made of special steel plate welding, but there is no special electrode. Most of the ordinary welding electrodes made of carbon electrode steel H08A as the welding core, the chemical composition of the deposited metal is quite different from that of the mother plate, and the carbon content of the former is the largest. Up to 0.10%, and the carbon content of the base material generally does not exceed 0.06%, and the electrode coating generally contains a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/0272B23K35/3073B23K35/3612B23K35/365B23K35/404
Inventor 侯登义周兰聚冯勇侯东华贾慧领
Owner SHANDONG IRON & STEEL CO LTD
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