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Nickel-based welding electrode for welding nickel-chromium-molybdenum alloy

An alloy steel, nickel-chromium-molybdenum technology, applied in the field of welding materials, can solve the problems of poor chemical composition matching, low strength, large gap between tensile strength and thermal crack resistance, and achieve stable performance, excellent thermal crack resistance, Excellent welding performance

Active Publication Date: 2012-05-02
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of electrode has a poor match between the chemical composition, mechanics and corrosion resistance of the deposited metal and the base metal. The nickel content is too high and the molybdenum element is lacking, and the strength is low, especially the tensile strength and thermal crack resistance. Defects such as large material gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The core composition of this embodiment is (wt%): C.0.05%, Mn.0.4%, Si.0.13%, S.0.005%, P.0.006%, Cr.21.5%, Ni.60%, Mo.9.1 %, Cu.0.01%, Nb.3.1%, Fe.5.3%, Co.0.02%, and the balance is impurities.

[0026] Taking 100kg welding core as an example, the weight of each component in the coating is as follows: Containing CaCO 3 97.5% marble 13.0kg, containing CaF 2 11.0kg of 96.7% fluorite, containing BaCO 3 98.8% barium carbonate 15.5kg, containing TiO 2 5.5kg of 97.6% rutile, 3.8kg of ferroniobium containing Nb 56.5%, Si 1.5%, Al 0.8%, FeO 26.7%, metal chromium powder 3.5kg, soda ash 0.50kg, electrolytic manganese (Mn≥99.5wt%) 0.47kg , containing ZrO 2 62wt%, SiO 2 25.5wt% zircon sand 1.7kg.

[0027] After the above powder is mixed evenly, add 8.5kg of potassium sodium water glass with a concentration of 43° and mix evenly, send it into the bar press and wrap it on the welding core according to the conventional method, and then bake it at a low temperature of 88°C fo...

Embodiment 2

[0030] In this embodiment, the core components and the main contents of each component in the coating are the same as in Example 1, still taking the 100kg welding core as an example: the weight of each component in the coating: marble 13.5kg, fluorite 13.0kg, barium carbonate 12.5kg , rutile 5.3kg, ferroniobium 3.8kg, metal chromium powder 4.00kg, soda ash 0.53kg, electrolytic manganese 0.52kg, zircon sand 1.32kg;

[0031] The electrode obtained in this example was subjected to a welding test, and the deposited metal composition was: C: 0.017%, Mn: 0.5%, Si: 0.35%, S: 0.01%, P: 0.005%, Cr: 22.5%, Mo: 8.65%, Fe: 5.2%, Co: 0.05%, Cu: 0.04%, Nb: 3.51%, and the balance is Ni and unavoidable impurities.

Embodiment 3

[0033] In this embodiment, the core components and the main contents of each component in the coating are the same as in Example 1, still taking the 100kg welding core as an example: the weight of each component in the coating: marble 14.0kg, fluorite 12.5kg, barium carbonate 13.5kg , rutile 5.2kg, ferroniobium 4.2kg, metal chromium powder 3.80kg, soda ash 0.48kg, electrolytic manganese 0.50kg, zircon sand 1.40kg;

[0034] The electrode obtained in this example was subjected to a welding test, and the deposited metal composition was: C: 0.021%, Mn: 0.42%, Si: 0.38%, S: 0.008%, P: 0.01%, Cr: 21.9%, Mo: 8.75%, Fe: 5.8%, Co: 0.06%, Cu: 0.02%, Nb: 3.42%, and the balance is Ni and unavoidable impurities.

[0035] Above-mentioned embodiment one, two and three: the average value of each mechanical property of three groups of welding deposited metals is: R P0.2 : 540Mpa, Rm: 830Mpa, A 5 The weight of each component in the drug skin: 33.5%, and the impact value at -196°C is 64J.

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Abstract

The invention relates to a nickel-based welding electrode which comprises the following component by weight percent (wt%): 50.0-68.0% of Ni, 18.0-23.0% of Cr, 6.0-11.0% of Mo, 3.0-6.0% of Nb, 2.50-9.00% of Fe, 0.01-0.1% of C, 0.10-1.00% of Mn, 0.010-0.10% of Si, 0.015% of S or less, 0.015% of P or less, 0.01-0.10% of Cu, 0.003-0.010% of Co and the balance of impurities. The coat of the nickel-based welding electrode comprises the following components by weight percent of the welding core: 12-18% of marble, 10-15% of fluorite, 12-18% of barium carbonate, 5.0-6.4% of rutile, 3.5-5.0% of ferroniobium, 3.3-4.5 of chromium metal powder, 0.45-0.65% of sodium carbonate, 0.45-0.65% of electrolytic manganese and 1.3-1.8% of zircon sand, and the adhesion agent is 10-20% of the total weight of the power. The nickel-based welding electrode is prepared by mixing, wrapping mixture on the welding core and baking at low and high temperature. The nickel-based welding electrode disclosed by the invention is used for nickel-chromium-molybdenum alloy steel welding, ensures that the excellent mechanical properties, the excellent corrosion resistance, the excellent thermal crack resistance and the hightensile strength of the welding seam match with those of the base material, has good welding process performance, guarantees attractive molding and can be used for the welding of the steel (with 9% of Ni) working at low temperature.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a nickel-based electrode for welding nickel-chromium-molybdenum alloy steel, which meets the requirements of ENi6625 in GB / T13814-2008. It is mainly used for welding and surfacing of nickel-chromium-molybdenum alloy steel, especially UNS N06625 (Inconel625) alloy steel, and can also be used for welding of Ni9% steel working under low temperature conditions. Background technique [0002] Nickel is an important non-ferrous metal. Pure nickel has high strength and plasticity, and is very stable to all alkaline solutions. It is not easy to corrode in nitric acid, and the attack of hydrofluoric acid is also very slow on it. Therefore, nickel and nickel alloys are commonly used to manufacture chemical and petroleum equipment. At present, Inconel 600 or Conroy 800 has been widely used abroad to manufacture chemical and petroleum equipment, and a large number of nickel alloy m...

Claims

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Application Information

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IPC IPC(8): B23K35/365B23K35/30
Inventor 黄义芳陈维富张克静
Owner ATLANTIC CHINA WELDING CONSUMABLES
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