A high-hardness wear-resistant surfacing electrode

A surfacing welding electrode, high hardness technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of serious peeling of surfacing welding layer, increasing crack tendency, and not being widely used, and achieve welding process performance Excellent, improve the toughness of the base metal, improve the effect of quantity

Active Publication Date: 2016-12-07
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another study shows that although the addition of higher boron can improve the wear resistance and hardness of the surfacing metal, the presence of boron will reduce the toughness of the surfacing layer, increase the stress of the surfacing layer, and increase the tendency of cracks. The layer peels off seriously and cannot be widely used

Method used

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  • A high-hardness wear-resistant surfacing electrode

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0028] The welding core of a high-hardness wear-resistant surfacing electrode adopts H08T carbon steel welding core with low S and P, and its chemical composition and content account for the weight percentage of the welding core in Table 1. .

[0029] Table 1 The chemical composition weight percentage (wt%) of welding core H08T (an example)

[0030] C

experiment example 2

[0032] Table 2 shows the chemical composition of high-carbon ferrochrome in the coating composition of a high-hardness wear-resistant surfacing electrode.

[0033] The chemical composition weight percent (wt%) of table 2 high-carbon ferrochrome (one example)

[0034] C

experiment example 3

[0036] According to the formula, mix the raw materials of the coating evenly, then add K2Na1 water glass and stir evenly, apply it on the welding core by a hydraulic machine, dry it in the natural environment until the coating is hard, then put it into the drying equipment for 2 hours at 360°C . See Table 3 for the weight percentage of the chemical composition of the electrode coating.

[0037] Table 3 drug skin chemical composition weight percentage (wt %)

[0038] Core composition

[0039] nickel powder

[0040] Note: in embodiment 4, ferroboron is low-carbon ferroboron, and ferrosilicon is 45# atomized ferrosilicon.

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Abstract

The invention discloses a high-hardness hardfacing electrode, comprising a core-welding wire and a coating, wherein the coating comprises the following components in percentage by mass: 20%-25% of marble, 10%-15% of fluorite, 15%-24% of high carbon ferro-chrome, 20%-28% of ferro-boron, 2%-5% of silicoferrite, 1%-3% of rare-earth fluoride or rare-earth oxide, 8%-13% of ferrotitanium, 3%-5.5% of graphite, 1%-2.5% of nickel, 1%-3% of mid-carbon ferromanganese and 1%-3% of one or two of molybdenum and tungsten. The surfacing welding electrode layer disclosed by the invention is high in metal hardness, free of peel-off, high in abrasive resistance, and excellent in welding technological properties, and can be used for multi-layer surfacing; the hardness HRC (Rockwell) of the surfacing layer is 64-70; the wear-resisting property of the surfaced work-piece can be effectively improved; the service life can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of surfacing welding electrodes, in particular to a high-hardness wear-resistant surfacing welding electrode that can be used for multi-layer surfacing welding. Background technique [0002] Among the hard surface surfacing materials in our country, the surfacing welding contract accounts for 70%, which plays a pivotal role in the welding materials. In the design and manufacture process of surfacing welding electrodes, a large amount of graphite and other alloys are added to form carbide alloys in order to increase the hardness. This material has high carbon equivalent, low plasticity, high stress, and is easy to peel off. Moreover, the method of using a large weight factor has a thick coating, which affects the welding process. For example, the required hardness can be achieved by adding tungsten carbide particles or increasing the carbon content, but the wear resistance and corrosion resistance of the cla...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B23K35/365B23K35/12
CPCB23K35/0272B23K35/3053B23K35/3602B23K35/365
Inventor刘玉双张亚平田海成李磊韩海峰
OwnerWUHAN TEMO WELDING CONSUMABLES CO LTD