Welding rod for high current welding stainless steel pressure vessels

A technology for pressure vessels and stainless steel, which is applied in the field of high-current welding electrodes for stainless steel pressure vessels, which can solve problems such as cracks and cracks, and achieve uniform melting speed, small spatter, and good arc stability

Active Publication Date: 2019-05-17
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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  • Welding rod for high current welding stainless steel pressure vessels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the coating is: 36% titanium dioxide, 19% orthoclase, 13% fluorspar powder, 8% marble, 0.2% bismuth oxide, 1.5% arc stabilizer, 7% deoxidizer , 5% slagging agent and 10.3% alloying agent. Wherein, the arc stabilizing agent comprises 77% of dehydrated mica and 23% of soda ash, accounting for 77% of the total weight of the arc stabilizing agent. The deoxidizer comprises 42% of micro-carbon ferrochrome, 50% of metal manganese and 8% of rare earth fluoride, accounting for the total weight of the deoxidizer. The slagging agent comprises 20% of zircon sand, 40% of magnetite and 40% of manganese ore which account for the total weight of the slagging agent. The alloy agent comprises 9.7% of metal nickel, 58% of metal chromium, 29% of chromium oxide green and 3.3% of molybdenum iron, accounting for the total weight of the alloy agent.

[0036] According to the above ratio, mix and stir the components of the coating evenly, add potassium sodium water glass wi...

Embodiment 2

[0038] The composition of the coating is: 33% titanium dioxide, 16% orthoclase, 14% fluorspar powder, 9% marble, 0.3% bismuth oxide, 2% arc stabilizer, 8.5% deoxidizer , 6% slagging agent and 11.2% alloying agent. Wherein, the arc stabilizing agent comprises 75% of dehydrated mica and 25% of soda ash, accounting for the total weight of the arc stabilizing agent. The deoxidizer comprises 47% of micro-carbon ferrochrome, 47% of metal manganese and 6% of rare earth fluoride, accounting for the total weight of the deoxidizer. The slagging agent comprises 16% of zircon sand, 33% of magnetite and 51% of manganese ore, accounting for the total weight of the slagging agent. The alloying agent comprises 9% of metallic nickel, 62.5% of metallic chromium, 26% of chromium oxide green and 2.5% of molybdenum iron, accounting for the total weight of the alloying agent.

[0039] Mix and stir the components of the coating according to the above ratio, add potassium sodium water glass with a ...

Embodiment 3

[0041] The composition of the coating is: 32% titanium dioxide, 17% orthoclase, 14% fluorspar powder, 8% marble, 0.3% bismuth oxide, 2% arc stabilizer, 8% deoxidizer , 7% slagging agent and 11.7% alloying agent. Wherein, the arc stabilizing agent comprises 75% of dehydrated mica and 25% of soda ash, accounting for the total weight of the arc stabilizing agent. The deoxidizer comprises 37.5% of micro-carbon ferrochromium, 56.25% of metal manganese and 6.25% of rare earth fluoride, accounting for the total weight of the deoxidizer. The slagging agent comprises 14% of zircon sand, 28% of magnetite and 58% of manganese ore accounting for the total weight of the slagging agent. The alloy agent comprises 8.5% of metal nickel, 70% of metal chromium, 21% of chromium oxide green and 0.5% of molybdenum iron, accounting for the total weight of the alloy agent.

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

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Abstract

The invention discloses a welding rod for high current welding stainless steel pressure vessels, and belongs to the field of welding materials. The welding rod consists of two parts including a welding core and a coating coated on the surface of the welding core. The coating is prepared from the following components in percentage by weight: 25%-40% of titanium dioxide, 15%-30% of orthoclase, 11%-15% of fluorite powder, 8%-9% of marble, 0.1%-0.4% of bismuth oxide, 1.3%-2.5% of an arc stabilizer, 6.3%-8.5% of a deoxidant, 4%-10% of a slag forming constituent and 4.6%-15.3% of an alloy agent. When the stainless steel pressure vessels are welded, the welding rod can be used for being matched with 180A current to carry out welding, during the process of the welding, the coating is not red, thecoating is not cracked, and the welding seam is well formed.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a welding rod for welding stainless steel pressure vessels with high current. 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. Stainless steel electrodes matching the base metal are generally used for welding when stainless steel pressure vessel joints, flanges and irregularly shaped positions or pressure vessels have defects. When using stainless steel electrodes for pressure vessel welding, increasing the welding current can increase the welding speed. In order to complete the task as soon as possible, the welder sometimes uses a welding current that exceeds the current allowed by the electrode, but when the welding current is too large, the temperature of the electrode rises sharply , It is prone to proble...

Claims

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Application Information

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Patent Type & Authority Applications(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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