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Welding rod and its preparation method

A technology of welding rods and welding cores, applied in welding equipment, welding media, manufacturing tools, etc., can solve problems such as peeling of welding layers, high manufacturing costs of welding rods, fatigue, etc., and achieve the effects of prolonging service life, low expansion rate, and not easy to peel off

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

[0003] At present, most of the coatings of existing wear-resistant surfacing electrodes are made of alloys containing tungsten carbide. The hardness of the surfacing layer of this type of surfacing electrode is HRC=58-62, with high red hardness and good wear resistance, but The toughness is poor, and it is only suitable for strong abrasive wear under mild impact. Fatigue occurs quickly under moderate impact, so that the welding layer peels off a lot, and the high wear resistance of the material cannot be fully exerted, and its application range is limited; at the same time The high price of tungsten carbide alloy makes the manufacturing cost of welding rod higher and limits its application range

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

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

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

[0015] Ferro-vanadium 30-36%, marble 27-35%, titanium dioxide 3-6%, high-carbon ferromanganese 8-12%, fluorite 2-4%, high-carbon ferrochrome 14-18%, nickel 1.5-2.5% 1-2% ferro-titanium;

[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 obtained in step B on the welding core and drying it.

[0018] Specifically, the modulus of sodium silicate glass is 2.9-3, and the degree of Baume is 46-48°.

[0019] There are many coating methods for welding rods, such as manual rubbing, dip coating, and mechanical high-speed extrusion coating (press coating method). The present invention is preferably prepared by the pressure coating method, which has high production efficiency and fas...

Embodiment 1

[0025] Example 1: The hardness of the surfacing deposited metal is ≥ HRC62, and the service life of the lining plate after surfacing welding repair is more than 2 times that of the original CHR227 electrode surfacing welding, and the hardness of the CHR227 electrode surfacing welding is above HRC55.

Embodiment 2

[0026] Example 2: The hardness of the surfacing welding deposit metal is ≥ HRC58, and the service life of the lining plate after surfacing welding repair is more than 2 times that of the original CHR227 electrode surfacing welding, and the hardness of the CHR227 electrode surfacing welding is above HRC55.

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Abstract

The present invention belongs to the field of welding material technology, and is especially one welding rod with high toughness. The welding rod includes one core wire and one welding rod coating comprising ferrovanadium 30-36 wt%, marble 27-35 wt%, titanium white powder 3-6 wt%, high carbon ferromanganese 8-12 wt%, fluorite 2-4 wt%, high carbon ferrochrome 14-18 wt%, nickel 1.5-2.5 wt%, and ferrotitanium 1-2 wt%. The welding rod has high hardness, high wear resistance and high impact strength.

Description

technical field [0001] The invention relates to welding rods 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, most of the coatings of existing wear-resistant surfacing electrodes are made of alloys containing tungsten carbide. The hardness of the surfacing layer of this type of surfacing electrode is HRC=58-62, with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22B05D7/20B05D7/24
Inventor 林剑东何藩张芮冉蓉平张宏黄平
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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