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Corrosion-resistant welding rod and its preparing method

A corrosion-resistant, welding rod technology, used in welding equipment, welding media, manufacturing tools, etc., can solve problems such as narrow application scope, failure of components, and infrequent application, and achieve the effect of wide application, improved toughness, and good welding performance.

Inactive Publication Date: 2008-03-26
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, surfacing 642 and surfacing 698 are both cast iron surfacing electrodes, with a narrow application range. They are mainly used for surfacing welding of cast iron substrates, and their carbon content is high, and the surfacing welding thickness is relatively thin, otherwise it will easily cause large-area cracks, resulting in parts The rapid failure of Heap 802, Heap 812, Heap 822 and other cobalt-based alloy surfacing electrodes, although they have excellent corrosion resistance and wear resistance, are expensive, and the current price is 450-550 yuan / kg (the smaller the diameter, the more expensive the price) , not widely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation method of welding rod is as follows:

[0014] A. Weigh the coating components in the following percentages by weight and mix:

[0015] Tungsten carbide 2~10%, boron carbide or boron nitride 2~8%, nickel powder 2~10%, copper 0.30~0.85%, rare earth 0.2~4.60%, manganese nitrogen alloy and / or vanadium nitrogen alloy any proportion 0.20~ 2.80%, ferromolybdenum 0.6-3.2%, marble 25-38%, titanium dioxide 2-8%, fluorite 1-6%, ferromanganese 3-8%, ferro-vanadium 0.35-4%, ferro-niobium or ferro-titanium 0.35 ~4%, ferrochrome balance, wherein, the ferromanganese is low-carbon ferromanganese or micro-carbon ferromanganese, and the ferrochrome is low-carbon ferrochrome or micro-carbon ferrochrome; the particle size of each component of the coating is 80-200 mesh ;

[0016] B, add the sodium bicarbonate that accounts for 4~6% of mixed component gross weight in the mixed component that step A gains, bond with sodium water glass;

[0017] C. Coating the adhesive obtai...

Embodiment 1

[0031] The raw material formula of the coating is (the sum of weight percentages is 100%): 2% tungsten carbide, 3% boron carbide, 4% nickel powder, 0.40% copper, 1.60% rare earth, manganese nitrogen alloy and / or vanadium nitrogen alloy in any proportion 0.40 %, 0.8% ferromolybdenum, 28% marble, 4% titanium dioxide, 5% fluorite, 4% low-carbon ferromanganese, 0.45% ferro-vanadium, 0.35% ferro-titanium, and the balance of low-carbon ferrochrome.

[0032] Then make welding rods according to the above method, the hardness of the surfacing layer is ≥ HRC55, and the corrosion rate is 0.008 mm / year (the corrosion rate is less than 0.05 mm / year, the metal The corrosion resistance is excellent; the corrosion rate is 0.05-0.5 mm / year, the corrosion resistance of the metal is considered good), the wear resistance is good, and the corrosion resistance is good.

Embodiment 2

[0034] The raw material formula of the coating is (the sum of weight percentages is 100%): tungsten carbide 8%, boron carbide 6%, nickel powder 6%, copper 0.60%, rare earth 2.60%, manganese nitrogen alloy and / or vanadium nitrogen alloy in any proportion 2.0 %, 2.0% ferromolybdenum, 30% marble, 6% titanium dioxide, 5% fluorite, 5% low-carbon ferromanganese, 2% ferro-vanadium, 3% ferro-titanium, and the balance of low-carbon ferrochrome.

[0035] Then make welding rods according to the above method, the hardness of the surfacing layer is ≥HRC60, and the corrosion rate is 0.045 mm / year in the sodium bicarbonate solution with a concentration of 30% at a temperature of 25oC (the corrosion rate is less than 0.05 mm / year, The corrosion resistance is excellent; the corrosion rate is 0.05-0.5 mm / year, the corrosion resistance of the metal is considered good), the wear resistance is very good, and the corrosion resistance is good.

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Abstract

The present invention belongs to the field of welding material technology, and is especially one kind of anticorrosive welding rod. The welding rod includes one core wire and one welding rod coating comprising tungsten carbide 2-10 wt%, boron carbide or boron nitride 2-8 wt%, nickel powder 2-10 wt%, copper 0.30-0.85 wt%, RE elements 0.2-4.60 wt%, Mn-N alloy and / or V-N alloy in any ratio 0.20-2.80 wt%, ferromolybdenum 0.6-3.2 wt%, marble 25-38 wt%, titanium white powder 2-8 wt%, fluorite 1-6 wt%, low carbon ferromanganese 3-8 wt%, ferrovanadium 0.35-4 wt%, ferroniobium or ferrotitanium 0.35-4 wt%, and low carbon ferrochrome for the rest. The welding rod has high corrosion resistance, high wear resistance, good welding performance and other advantages.

Description

technical field [0001] The invention relates to a corrosion-resistant welding rod and belongs to the field of welding materials. Background technique [0002] The electrode coating decomposes and melts during the welding process to form gas and slag, which play the role of mechanical protection, metallurgical treatment and improvement of process performance. The composition of the coating includes: minerals (such as marble, fluorspar, etc.), ferroalloys and metal powders (such as ferromanganese, ferrotitanium, etc.), organic substances (such as wood flour, starch, etc.), chemical products (such as titanium White powder, water glass, etc.). Common electrode coatings are titanium calcium type (J422 electrode, acid slag) and low hydrogen type (J507 electrode, basic slag). [0003] At present, many industrial equipment, such as rolling-related equipment that needs to be cooled by water in metallurgy, mineral processing equipment in mines, propellers in ships, water wheel blade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/30B05D7/20B05D7/24
Inventor 林剑东何藩陈建平张芮王成君冉蓉平张宏
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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