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Nickel-based welding electrode for welding nickel chromium iron alloy steel

A ferroalloy steel, nickel-chromium technology, applied in the field of welding electrodes, can solve the problems of uneven coverage of slag slag shell, poor surface brightness, uneven welding seam formation, etc. Excellent performance, beautiful molding effect

Active Publication Date: 2015-05-27
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The solution of the present invention is that the melting point of nickel-based alloys is higher than that of iron-based alloys. The welding rods trial-produced with ordinary acidic or alkaline slag-based coating formulas often have poor arc stability, large slag viscosity, and molten pools. Poor fluidity, uneven coverage of slag shells; hard slag shells, difficult slag removal, and unclean residue cleaning; uneven weld formation, poor surface brightness, and not suitable for atomic furnace pressure vessels and chemical tanks Defects such as welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The chemical composition (percentage by weight) of the nickel-chromium-iron welding core in this embodiment is: C: 0.014, S: 0.003, P: 0.005, Si: 0.08, Mn: 3.09, Cr: 16.41, Fe: 2.92 , Cu: 0.016, Ti: 0.47, Co: 0.022, Nb: 1.64, and the balance is Ni; this example takes the preparation of a 250kg welding core coating as an example, and the weight of each component in the coating is as follows: Containing TiO 2 94.6wt% rutile powder 33kg, containing F55wt% cryolite powder 15kg, containing CaCO 3 98.50wt% marble powder 20kg, containing FeO+Fe 2 o3 48.77wt%, TiO 2 46.82wt% ilmenite powder 7kg, containing BaCO 3 99.3wt% barium carbonate 4kg, containing Na 2 O 12.67wt% sodium alginate 0.5kg, containing Na 2 CO 3 0.5kg of soda ash of 99.1wt%, 16kg of electrolytic manganese containing Mn99.53wt%, 4kg of ferroniobium powder containing Nb55.54wt%; Potassium sodium water glass with a modulus of 43° and a modulus of 3.1M was mixed evenly, and made into a paste ...

Embodiment 2

[0023] Embodiment 2: The composition of the welding core in this embodiment is the same as that in Example 1; still taking the preparation of a 250kg welding core coating as an example, the weight of each component in the coating is as follows: 18kg of rutile powder, 16kg of cryolite powder, 32kg of marble powder, titanium Iron ore powder 9kg, barium carbonate 4kg, sodium alginate 0.5kg, soda ash 0.5kg, electrolytic manganese 16kg, ferroniobium powder 4kg; Welding experiments were carried out on the electrode obtained in this example, and the welding process was the same as in Example 1; the deposited metal composition of the electrode was: C: 0.034%, Mn: 5.89%, Si: 0.42%, S: 0.007%, P: 0.004% , Cr: 15.97%, Fe: 7.06%, Cu: 0.016%, Ti: 0.120%, Nb: 1.64%, the balance is Ni and unavoidable impurities; the mechanical properties of the deposited metal at room temperature: Rm = 635Mpa, Rp 0.2 =395Mpa, A=43.5%, -196°C ultra-low temperature impact energy AKV average value 105J; high t...

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Abstract

The invention belongs to a nickel-based welding electrode for welding nickel chromium iron alloy steel. The nickel-based welding electrode comprises a core wire, a coating and an adhesive, wherein the core wire comprises the following components in percentage by weight: 2.5%<=Mn<=4.0%, 15.0%<=Cr<=18.0%, 2.0%<=Fe<=5.0%, 0.4%<=Ti<=1.0%, 1.5<=Nb<=2.5%, Co<=0.05%, Cu<=0.30%, C<= 0.04%, S<= 0.010%, P<=0.025%, Si<= 0.20%, and the balance of Ni; and the coating comprises the following components in percentage by weight: 18 to 35% of rutile powder, 15 to 30% of cryolite, 20 to 35% of marble powder, 6 to 10% of ilmenite powder, 3 to 6% of barium carbonate, 0.5 to 1% of sodium alginate, 0.2 to 0.6% of soda ash, 12 to 20% of electrolytic manganese, and 3 to 5% of ferrocolumbium powder. The nickel-based welding electrode for welding nickel chromium iron alloy steel has the advantages that the welding technology capacity is high, weld joints are smooth and bright, the appearance is nice, welding beads are in proper height, and infiltration angles of the weld joints are proper; the deposited metal is high in comprehensive mechanical performance under conditions with common temperature, ultralow temperature and high temperature, and can be applied to the working condition with high radiation; and a welding body can be safely and reliably operated within the working temperature range from -196 DEG C to 980 DEG C.

Description

technical field [0001] The invention relates to an electric welding electrode for welding processing, especially an electric welding electrode specially used for welding nickel-iron-chromium alloy steel with high requirements for heat resistance and corrosion resistance, which can meet the requirements of ENi6182 in GB / T13814-2008. The processed welded body can be used safely and reliably in the working temperature range from -196°C ultra-low temperature to 980°C. This electrode can be used for the welding of Inconel 600 and 601 of the same material and dissimilar material. Welding of stainless steel; welding of Hastelloy N and 347SS, Inconel 600, nickel 200, etc.; especially suitable for welding of atomic furnace pressure vessels and chemical tanks. Background technique [0002] Nickel-based alloys refer to a class of alloys that have comprehensive properties such as high strength and certain oxidation and corrosion resistance at high temperatures of 650-1000 °C. Nickel-b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/365
Inventor 王若蒙李典钊
Owner ATLANTIC CHINA WELDING CONSUMABLES
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