Nickel-based welding rod for welding of ultralow-temperature container steel

A technology of steel and nickel-based electrodes for containers, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of poor welding process, unapplied application, and low low temperature toughness of welds.

Inactive Publication Date: 2017-03-22
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are researches in this area on the supporting nickel-based electrodes in China, they have not been applied in actual engineering.
The main problem is that when domestic nickel-based electrodes are welded with AC power, the welding process of vertical welding is poor, and the low-temperature toughness of the weld is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The chemical composition of the core is as follows: C: 0.02%, Si: 0.20%, Mn: 6.14%, P: 0.001, S: 0.002%, Ni: 14.65, Mo: 5.80%, Nb: 0.98, W: 1.36, Fe: 0.12%, the balance is Ni. The weight percentage content of the powder in the coating is: marble 33%, strontium carbonate 3%, potash feldspar 1%, fluorite 3%, magnesium fluoride 7%, cryolite 15%, rutile 15%, titanium iron 7% , Aluminum iron 4%, magnesium aluminum powder 2%, molybdenum iron 5%, niobium iron 3%, tungsten iron 2%. After mixing the powders of the ingredients in the coating uniformly in proportion, add potassium water glass accounting for 21% of the total mass of the coating, stir and mix uniformly, and then send it to the pressure coater to coat it on the solder core. It is baked at a low temperature of 100°C and a high temperature of 320°C to manufacture the electrode.

[0024] When the welding rod of this embodiment adopts AC welding, the welding processability is good in the four welding positions of horizont...

Embodiment 2

[0026] The chemical composition of the core is as follows: C: 0.02%, Si: 0.20%, Mn: 6.14%, P: 0.001, S: 0.002%, Ni: 14.65, Mo: 5.80%, Nb: 0.98, W: 1.36, Fe: 0.12%, the balance is Ni. The weight percentage content of the powder in the coating is: 28% marble, 7% strontium carbonate, 2% potash feldspar, 11% fluorite, 7% magnesium fluoride, 8% cryolite, 12% rutile, and 7% ferro-titanium , Aluminum iron 6%, magnesium aluminum powder 1%, molybdenum iron 3%, niobium iron 4%, tungsten iron 3%. After mixing the powders of the ingredients in the coating uniformly in proportion, adding potassium water glass accounting for 26% of the total mass of the coating, stirring and mixing uniformly, and then sending it into the press coater to coat it on the solder core, and then pass Baking at a low temperature of 150°C and a high temperature of 280°C to manufacture the electrode.

[0027] When the welding rod of this embodiment adopts AC welding, the welding processability is good in the four wel...

Embodiment 3

[0029] The chemical composition of the core is as follows: C: 0.02%, Si: 0.20%, Mn: 6.14%, P: 0.001, S: 0.002%, Ni: 14.65, Mo: 5.80%, Nb: 0.98, W: 1.36, Fe: 0.12%, the balance is Ni. The weight percentage content of the powder in the medicine skin is: marble 23%, strontium carbonate 7%, potash feldspar 4%, fluorite 6.5%, magnesium fluoride 6%, cryolite 11%, rutile 20%, titanium iron 7% , Aluminum iron 5%, magnesium aluminum powder 0.5%, molybdenum iron 6%, niobium iron 3%, tungsten iron 1%. After mixing the powders of the ingredients in the coating uniformly in proportion, adding potassium water glass accounting for 29% of the total mass of the coating, stirring and mixing uniformly, and then sending it into the press coater to coat it on the solder core. Baked at a low temperature of 150°C and a high temperature of 320°C to manufacture the electrode.

[0030] When the welding rod of this embodiment adopts AC welding, the welding processability is good in the four welding posit...

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PUM

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Abstract

The invention discloses a nickel-based welding rod for welding of ultralow-temperature container steel and belongs to the technical field of nickel-based welding rods. The nickel-based welding rod comprises a welding core and a coating covering the surface of the welding core. The welding core comprises the chemical components of, by weight percentage, 0-0.1% of C, 0-0.6% of Si, 1.5%-4.5% of Mn, 0-0.012% of S, 0-0.015% of P, 0-17.0% of Cr, 4.5%-9.5% of Mo, 0.5%-2.0% of Nb, 0.5%-2.0% of W, and the balance Ni. The coating comprises the powdery materials of, by weight percentage, 20%-38% of marble, 5%-8% of strontium carbonate, 1%-4% of potassium feldspar, 3%-13% of fluorite, 2%-10% of magnesium fluoride, 3%-15% of cryolite, 10%-20% of rutile, 2%-7% of ferrotitanium, 2%-6% of ferro-aluminium, 0.5%-2% of aluminum magnesium powder, 4%-7% of ferro-molybdenum, 2%-5% of ferroniobium and 1%-3% of ferrotungsten, and the sum of all the components is 100%. The nickel-based welding rod has excellent welding manufacturability in horizontal, transverse, vertical, overhead and other welding positions when an alternating current power source is adopted for welding, and the nickel-based welding rod also has excellent low temperature toughness.

Description

Technical field [0001] The invention belongs to the technical field of nickel-based electrodes, and particularly relates to a nickel-based electrode used for welding steel for ultra-low temperature (-196°C) vessels. Background technique [0002] With the rapid economic development of our country, the environment has also been severely damaged. People pay more and more attention to environmental protection. As a clean and efficient energy source, LNG (liquefied natural gas) has become more and more popular. Many countries have listed LNG as the fuel of choice, and the proportion of natural gas in energy supply has increased rapidly. Liquefied natural gas is growing at a high rate of about 12% per year, making it one of the fastest growing energy industries in the world. my country's natural gas utilization is extremely unbalanced, and the proportion of natural gas in China's energy is very small. However, the characteristics of LNG are destined to develop very rapidly. Accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/365
CPCB23K35/3033B23K35/365
Inventor 齐彦昌马成勇魏金山肖红军田志凌
Owner CENT IRON & STEEL RES INST
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