Special high-temperature fly ash wear resistant arc spraying wire for amorphous nanocrystal
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An amorphous nanocrystalline and fly ash wear technology, which is applied in coating, fusion spraying, metal material coating process, etc., to achieve the effect of high hardness, high bonding strength, and uniform coating structure.
Inactive Publication Date: 2013-04-17
JIANGXI HENGDA HI TECH CO LTD
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Arc spraying has the characteristics of rapid heating, rapid cooling, large-scale construction on site, low cost, and stable coating performance. It can be widely used in the field of anti-wear industry. There is no amorphous nanocrystal that is resistant to high-temperature fly ash wear through domestic and foreign searches. Patent report on special electric arc spraying wire
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Embodiment 1
[0017] Take an appropriate amount of alloy powder containing the above-mentioned inventive components Cr, Mo, B, Nb, C, Mn, Si and put it into a powder mixer and mix for 30 minutes, then add the mixed powder into the U-shaped groove of the low-carbon steel strip; put the U-shaped The groove is closed, so that the powder is wrapped in it, and then drawn one by one by a wire drawing machine, and the diameter is reduced, and finally the diameter reaches the specified value of 2.0mm arc sprayed wire. The content of the wire is Cr21.0%, Mo5.0 by mass percentage %, B4.0%, Nb4.0%, C2.0%, Mn1.5%, Si1.0%, residual iron.
[0018]
Embodiment 2
[0020] Take an appropriate amount of alloy powder containing the above-mentioned inventive components Cr, Mo, B, Nb, C, Mn, Si and put it into a powder mixer and mix for 30 minutes, then add the mixed powder into the U-shaped groove of the low-carbon steel strip; put the U-shaped The slots are closed, so that the powder is wrapped in it, and then drawn and reduced one by one through the wire drawing machine, and finally the arc sprayed wire whose diameter reaches the specified value of 2.0mm. According to mass percentage, the content of wire material is Cr22.0%, Mo5.0%, B4.5%, Nb4.0%, C1.5%, Mn1.5%, Si0.5%, and residual iron.
[0021] As shown in Table 1, the arc spraying coating developed by the present invention has a large high-temperature hardness value and good wear resistance; its high-temperature relative wear resistance exceeds any arc spraying material currently on the market, and can effectively improve metal structures and devices. The performance of components in h...
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Abstract
The invention relates to a hot spraying material, and particularly relates to a special high-temperature fly ash wear resistant arc spraying wire for an amorphous nanocrystal and a coating prepared therefrom, belonging to the technical field of wear resistant materials. The wire comprises the following components in percentage by mass: 20.0-22.0% of Cr, 4.0-6.0% of Mo, 3.0-5.0% of B, 3.0-5.0% of Nb, 1.0-2.0% of C, 1.0-2.0% of Mn, 0.5-1.0% of Si and the balance of iron. After the wire developed by the invention is applied onto a metal matrix subjected to sand blasting and coarsening according to arc spraying process parameters in the prior art, the prepared coating contains a large number of amorphous nanocrystal structures and is uniform in microstructure and extremely high in hardness, the normal-temperature HV0.3 is higher than 1100, and the porosity is lower than 5%; and the wear resistant coating provided by the invention has high bonding strength (higher than 75 MPa at normal temperature) and excellent shock resistance toughness, and the high-temperature hardness HV0.3 at 600 DEG C is higher than 350.
Description
technical field [0001] The invention relates to a thermal spraying material, in particular to an amorphous and nanocrystalline special arc spraying wire material resistant to high-temperature fly ash wear and the coating made thereof, which belongs to the technical field of wear-resistant materials. Background technique [0002] When fuel is burned, especially when solid fuel is burned, due to the presence of ash, moisture and sulfur in the fuel, the working conditions of each heating surface of the boiler become worse. Moreover, most of the boiler fuel in our country is coal, which contains ash. After the pulverized coal furnace is burned, the ash will eventually be discharged out of the boiler body, most of which will reach the dust collector after passing through the rear heating surface. At this time, when the high-speed flue gas containing ash particles and incompletely burned coal particles in the flue gas flows through the tube panel of the heating surface of the boil...
Claims
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