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

A nickel-based electrode, iron alloy steel technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of uneven slag shell coverage, poor arc stability, and uneven weld formation problem, to achieve the effect of excellent slag removal performance, excellent mechanical performance indicators, and beautiful molding.

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, and the welding rods trial-produced with ordinary acidic or alkaline slag-based coating formulas often have poor arc stability, large slag viscosity, and molten pool Poor fluidity, uneven coverage of slag shells; hard slag shells, difficult slag removal, and unclean residue cleaning; uneven weld formation, poor surface brightness, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]The chemical composition (percentage by weight) of the nickel-chromium-iron welding core in this embodiment is: C: 0.013, S: 0.002, P: 0.003, Si: 0.07, Mn: 3.07, Cr: 16.49, Fe: 3.38, Cu: 0.017 , Ti: 0.48, Co: 0.019, Nb: 1.77, 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 34kg, containing F55wt% cryolite powder 24kg, containing CaCO 3 98.50wt% marble powder 20kg, containing FeO+Fe 2 o 3 48.80wt%, TiO 2 47.07wt% ilmenite powder 3kg, containing BaCO 3 99.3wt% barium carbonate 3kg, containing Na 2 O 12.67wt% sodium alginate 0.5kg, containing Na 2 CO 3 0.5kg of 99.1wt% soda ash, 5kg of electrolytic manganese containing Mn99.56wt%, 4kg of molybdenum iron powder containing Mo57.35wt%, 6kg of Nb5.52wt% ferroniobium powder; mix the above-mentioned powders after weighing After uniformity, add 25 kg of potassium sodi...

Embodiment 2

[0026] 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: rutile powder 22kg, cryolite powder 16kg, marble powder 35kg, ilmenite powder 5kg , barium carbonate 6kg, sodium alginate 0.5kg, soda ash 0.5kg, electrolytic manganese 5kg, molybdenum iron powder 4kg, niobium iron powder 6kg; All the other are also identical with embodiment 1. The electrode obtained in this example was subjected to a welding experiment, and its welding process was the same as in Example 1; the deposited metal composition of the electrode was: C: 0.025%, Mn: 2.04%, Si: 0.38%, S: 0.009%, P: 0.001% , Cr: 14.434%, Mo: 1.35%, Fe: 8.44%, Cu: 0.035%, Ti: 0.074%, Nb: 2.468%, the balance is Ni and unavoidable impurities; mechanical properties of deposited metal at room temperature : Rm=645Mpa, Rp 0.2 =390Mpa, A=42.5%, -196°C ultra-low temper...

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Abstract

The invention belongs to a nickel-based welding rod for welding nickel chromium iron alloy steel. The nickel-based welding rod 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%, the balance of Ni; and the coating comprises the following components in percentage by weight: 20 to 35% of rutile powder, 15 to 30% of cryolite, 20 to 35% of marble powder, 3 to 7% of ilmenite powder, 3 to 8% of barium carbonate, 0.5 to 1% of sodium alginate, 0.2 to 0.6% of soda ash, 3 to 6% of electrolytic manganese, and 3 to 6% of ferrocolumbium powder. The nickel-based welding rod 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, in particular to a nickel-iron-chromium alloy steel ( UNS NO8800) electrode; the welding body processed by this electrode can be used safely and reliably in the working temperature range from -196°C ultra-low temperature to 980°C. The electrode can be used for welding dissimilar metals between austenitic and ferritic stainless steels and high-nickel alloys of various compositions, such as: Inconel alloy (Inconel alloy) and carbon steel, stainless steel, nickel 200, nickel-covered nickel Welding of Al alloy, 70-30 copper-nickel alloy; Welding of copper-nickel alloy and nickel 200, Monel alloy, etc. It is especially suitable for welding LNG liquefied nitrogen storage tanks and the welding of Inconroy 800 and 9% nickel steel. Background technique [0002] Nickel-based alloys refer to a class of alloys that have comprehensive properties such as high strength and certain oxidation and cor...

Claims

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Application Information

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