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Flux-cored wire used for submerged arc surfacing repair of furnace bed roll
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A technology of flux-cored welding wire and submerged arc surfacing, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of wasting alloy elements, etc., and achieve the effect of excellent welding process performance
Inactive Publication Date: 2011-06-08
CHINA JINGYE ENG TECH CO LTD +1
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Problems solved by technology
Since the hearth roll is made of high-chromium-nickel stainless steel, a large amount of alloying elements will inevitably be wasted for disposal after off-line
Method used
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[0035] Select 00Cr17 ferritic stainless steel with a thickness of 0.3mm and a width of 14mm, and roll it into a U shape, use 74g of metal chromium, 82g of metal nickel, 6g of high-carbon ferrochrome, 16g of metal manganese, 4g of fluoride, and 2.5g of rare earthferrosilicon. Aluminum-magnesiumalloy 5g, graphite 2.5g, titanium iron 1g, iron powder 7g. After mixing, put it into the U-shaped groove, the filling rate is 51%, after closing and gradually reducing the diameter, the final diameter is φ2.8mm.
Embodiment 3
[0037] Select 00Cr17 ferritic stainless steel with a thickness of 0.3mm and a width of 14mm, roll it into a U shape, use 78g of metal chromium, 85g of metal nickel, 6g of high-carbon ferrochrome, 15g of metal manganese, 3g of fluoride, 3g of rare earth ferrosilicon, aluminum Magnesium alloy 5g, graphite 2.5g, titanium iron 1g, iron powder 1.5g. After mixing, put it into the U-shaped groove, the filling rate is 49%, after closing and gradually reducing the diameter, the final diameter is φ2.8mm.
[0038] Compare with the effect of welding wire of three embodiments of the present invention and traditional welding rod surfacing welding repair hearth roller, as shown in table 1:
[0039] Table 1
[0040] example
[0041] It can be seen that the welding wire of the present invention is used in combination with alkaline sintering flux, the weld seam is beautifully formed, the process performance is excellent, and there is no metallurgical defect such as cracks and slag in...
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Abstract
The invention discloses a flux-cored wire used for submerged arc surfacing repair of a furnace bed roll, relating to the weldingmaterial technology. An external steel strip of the flux-cored wire is a 00Cr17 ferric stainless steel strip, and the flux of the flux-cored wire comprises the following components in percent by weight: 30-40 percent of metalchromium, 30-40 percent of metalnickel, 5-10 percent of metalmanganese, 2-5 percent of high-carbon ferrochrome, 0.5-3 percent of rare earthferrosilicon, 5-10 percent of fluoride, 2-5 percent of aluminiummagnesiumalloy, 1-1.5 percent of graphite, less than 1 percent of ferrotitanium and the balance of iron powder. By adopting the flux-cored wire disclosed by the invention, the continuous operation of the submerged arc surfacing repair of the furnace bed roll can be realized, and the technical difficulty of high hot crack sensitivity of a pure austenite weld joint is solved. The flux-cored wire disclosed by the invention has an excellent welding process performance, and can be widely applied to the submerged arc surfacing repair of the furnace bed roll.
Description
technical field [0001] The invention relates to the technical field of welding materials, and relates to a flux-cored wire used for repairing furnace bottom rolls by submerged arc surfacing welding. Background technique [0002] Hearth rollers are one of the commonly used spare parts in the steel industry. Continuous annealing furnaces and normalizing furnaces in steel mills require a large number of hearth rollers to transport steel plates that require heat treatment. During use, the hearth rollers are subjected to high temperatures in the furnace (950°C, up to 1100°C) and the friction and wear of high-temperature steel plates (the running speed of the steel plates on the surface of the hearth rolls is up to 50m / s), which requires the furnace The bottom roller has high high temperature strength, high temperature oxidation resistance, high temperature wear resistance and other properties. [0003] The materials used to manufacture hearth rollers are mostly Cr25Ni20 series ...
Claims
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