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A welding rod for welding stainless steel pressure vessel with high current

A technology for pressure vessels and stainless steel, which is applied in the field of welding electrodes for high-current welding stainless steel pressure vessels, and can solve problems such as cracks and cracks

Active Publication Date: 2021-05-18
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when repairing the defects of the pressure stainless steel vessel, the welding material consistent with the base metal is usually selected for welding. When the carbon steel welding core material is used for repair, it is often cracked or cracked due to the inconsistency with the base material.

Method used

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  • A welding rod for welding stainless steel pressure vessel with high current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the drug skin is: 36% titanium dioxide, 19% orthoclase, 13% fluorspar powder, 8% dolomite, 0.2% bismuth oxide, 1.5% arc stabilizer, 7% deoxidizer , 5% slagging agent and 10.3% alloying agent. Among them, the arc stabilizer includes dehydrated mica and 23% soda ash, which account for 77% of the total weight of the arc stabilizer. The deoxidizer includes 42% of micro-carbon ferrochromium, 50% of metal manganese and 8% of rare earth fluoride, accounting for 42% of the total weight of the deoxidizer. The slag-forming agent includes zircon sand, 40% magnetite and 40% manganese ore, accounting for 20% of the total weight of the slag-forming agent. The alloying agent consists of 9.7% metallic nickel, 58% metallic chromium, 29% chromium oxide green and 3.3% ferromolybdenum by weight of the alloying agent.

[0036] Mix and stir evenly the components of the coating according to the above ratio, add potassium sodium water glass with a total weight of 15% of th...

Embodiment 2

[0038] The composition of the drug skin is: 33% titanium dioxide, 16% orthoclase, 14% fluorspar powder, 9% dolomite, 0.3% bismuth oxide, 2% arc stabilizer, 8.5% deoxidizer , 6% slagging agent and 11.2% alloying agent. Among them, the arc stabilizer includes dehydrated mica and 25% of soda ash, which account for 75% of the total weight of the arc stabilizer. The deoxidizer includes 47% of micro-carbon ferrochromium, 47% of metallic manganese and 6% of rare earth fluoride, accounting for 47% of the total weight of the deoxidizer. The slagging agent includes zircon sand, 33% magnetite and 51% manganese ore, which account for 16% of the total weight of the slag agent. The alloying agent consists of 9% metallic nickel, 62.5% metallic chromium, 26% chromium oxide green and 2.5% ferromolybdenum by weight of the alloying agent.

[0039] Mix and stir evenly the components of the coating according to the above proportions, add potassium sodium water glass with a total weight of 20% of...

Embodiment 3

[0041] The composition of the drug skin is: 32% titanium dioxide, 17% orthoclase, 14% fluorspar powder, 8% dolomite, 0.3% bismuth oxide, 2% arc stabilizer, 8% deoxidizer , 7% slagging agent and 11.7% alloying agent. Among them, the arc stabilizer includes dehydrated mica and 25% of soda ash, which account for 75% of the total weight of the arc stabilizer. The deoxidizer includes 37.5% of micro-carbon ferrochromium, 56.25% of metal manganese and 6.25% of rare earth fluoride, which account for 37.5% of the total weight of the deoxidizer. The slagging agent includes zircon sand, 28% magnetite and 58% manganese ore, which account for 14% of the total weight of the slag agent. The alloying agent comprises 8.5% of metallic nickel, 70% of metallic chromium, 21% of chromium oxide green and 0.5% of ferromolybdenum by weight of the alloying agent.

[0042] Mix and stir evenly the components of the coating according to the above ratio, add potassium sodium water glass with a total weig...

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Abstract

The invention discloses an electrode for welding stainless steel pressure vessels with high current, which belongs to the field of welding materials. The electrode is composed of a welding core and a coating covering the surface of the welding core. The coating contains the following components in weight percentage : 25%‑40% titanium dioxide, 15%‑30% orthoclase, 11%‑15% fluorspar powder, 8%‑9% marble, 0.1%‑0.4% bismuth oxide, 1.3%‑ 2.5% arc stabilizer, 6.3%-8.5% deoxidizer, 4%-10% slagging agent and 4.6%-15.3% alloying agent. When welding stainless steel pressure vessels, this electrode can be used with 180A current for welding, and the coating will not turn red, the coating will not crack during the welding process, and the weld seam is well formed.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to an electrode for high-current welding of stainless steel pressure vessels. Background technique [0002] Stainless steel pressure vessels are widely used in petrochemical, nuclear power, thermal power, chemical and other fields, and generally need to withstand high temperature and high pressure. When stainless steel pressure vessel joints, flanges, and irregularly shaped positions or pressure vessels have defects for re-repair welding, stainless steel electrodes that match the base metal are generally used for welding. When using stainless steel electrode for pressure vessel welding, increasing the welding current can increase the welding speed. In order to complete the task as soon as possible, the welding current used by the welder sometimes exceeds the current allowed by the electrode, but when the welding current is too large, the temperature of the electrode increases sharpl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 王志银付红亮姚立春
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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