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Welding electrode suitable for welding natural gas storage tank by utilizing alternating current power supply and preparation method of welding electrode

A technology of AC power supply and natural gas, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of high price, can only use AC power supply for welding, and cannot use DC power supply for welding, etc., and achieve good welding performance. , Eliminate arc break and arc break phenomenon, avoid the effect of undercut

Active Publication Date: 2019-09-20
株洲湘江电焊条有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, this kind of welding rod suitable for AC power welding of natural gas storage tanks was imported from Japan in the past, and the price is expensive. A large domestic welding consumables company launched a welding rod using DC power welding in 2002 until 2018. It is still a DC power welding electrode. There is no progress, but as a 9% nickel steel itself, there is a phenomenon of magnetic blowing, so DC power can not be used for welding, but AC power can only be used for welding, and in order to prevent cracks in the weld, it needs to be welded at a lower current than ordinary electrodes

Method used

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Examples

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Effect test

preparation example Construction

[0109] Through the limitation of each component and reasonable mass percentage of the welding rod of the present invention, the electric arc can be well controlled, so that it can be applied to the welding of AC power supply, thereby avoiding the problem of magnetic deflection blowing of DC power supply welding, and another In one aspect, this aspect also provides a method for preparing an electric welding electrode suitable for welding natural gas storage tanks with an AC power source. The steps of the method include: preparing or obtaining a chemical product, aluminosilicate, and cellulose mixed powder;

[0110] Mix the components of the welding rod according to the mass percentage of each component and pour it into a vertical mixer for 6-10 minutes of dry stirring, then add potassium and sodium mixed with water glass and stir to a suitable viscosity to obtain the welding rod powder;

[0111] Press and coat the welding rod powder on the welding rod core on the hydraulic press...

Embodiment 1

[0121] The components and mass percentages of the components contained in the welding electrodes suitable for AC power welding of natural gas storage tanks are as follows:

[0122] Marble 55%;

[0123] Fluorite 26.8%;

[0124] Iron powder 2%;

[0125] Atomized ferrosilicon 4.2%;

[0126] Electrolytic manganese 3%;

[0127] Micro-carbon ferrochrome 2%;

[0128] Aluminum-magnesium alloy 1%;

[0129] 0.5% for chemical products;

[0130] Aluminosilicate 5%;

[0131] Cellulose mixed powder 0.5%;

[0132] The total of the above components is 100%; where,

[0133] The components contained in chemical products and the percentages of each component are as follows:

[0134] Potassium carbonate 25%;

[0135] Composite potassium titanate 70%;

[0136] Soda Ash 5%, Total 100%.

[0137] The components contained in the aluminosilicate and the mass percentage of each component are as follows:

[0138] Dehydrated clay 25%;

[0139] Wollastonite 52%;

[0140] Quartz sand 12%.

...

Embodiment 2

[0154] An electric welding electrode suitable for welding natural gas storage tanks with an AC power source, the components and mass percentages of the components contained in it are as follows:

[0155] Marble 20%;

[0156] Fluorite 37%;

[0157] Iron powder 6%;

[0158] Atomized ferrosilicon 7%;

[0159] Electrolytic manganese 5%;

[0160] Micro-carbon ferrochrome 4%;

[0161] Aluminum-magnesium alloy 3%;

[0162] 5% for chemical products;

[0163] Aluminosilicate 9%;

[0164] Cellulose Mix Powder 4%.

[0165] in,

[0166] The components contained in chemical products and the percentages of each component are as follows:

[0167] Potassium carbonate 60%;

[0168] Composite potassium titanate 28%;

[0169] Soda Ash 12%, Total 100%.

[0170] The components contained in the aluminosilicate and the mass percentage of each component are as follows:

[0171] Dehydrated clay 10%;

[0172] Wollastonite 52%;

[0173] Quartz sand 23%, total 100%.

[0174] The component...

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Abstract

The invention discloses a welding electrode suitable for welding a natural gas storage tank by utilizing alternating current power supply and a preparation method of the welding electrode. The welding electrode comprises the following components of, in percentage by mass, 20%-55% of marble, 26.8%-37% of fluorite, 2%-6% of iron powder, 4.2%-7% of atomized silicon iron, 3%-5% of electrolytic manganese, 2%-4% of micro-carbon ferrochrome, 1%-3% of aluminium-magnesium alloy, 0.5%-5% of a chemical product, 5%-9% of aluminosilicate, 0.5%-4% of cellulose mixed powder, and 100% of total components; and the chemical product comprise the following components of, in percentage by weight, 25%-60% of potassium carbonate, 28%-70% of composite potassium titanate, 5%-12% of sodium carbonate and 100% of total. The welding electrode can be stably welded under an alternating current power supply, the phenomena of arc breaking and arc suppression are eliminated, welding can be carried out smoothly in case of the situation that the welding current is 40%-50% of the current of a common welding rod, so that a weld joint crack is prevented from being generated, and the full-position welding performance is good so as to avoid the edge biting phenomenon.

Description

technical field [0001] The invention relates to an electric welding electrode suitable for welding a natural gas storage tank with an alternating current power source and a preparation method thereof. Background technique [0002] At present, this kind of welding rod suitable for AC power welding of natural gas storage tanks was imported from Japan in the past, and the price is expensive. A large domestic welding consumables company launched a welding rod using DC power welding in 2002 until 2018. It is still a DC power welding electrode. There is no progress, but as a 9% nickel steel itself, there is a magnetic blowing phenomenon, so DC power can not be used for welding, but only AC power can be used for welding, and in order to prevent cracks in the weld, it needs to be welded at a lower current than ordinary electrodes. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art, and to provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
CPCB23K35/3602B23K35/3605B23K35/365B23K35/404
Inventor 吴郁均
Owner 株洲湘江电焊条有限公司
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