Grate bar material of trolley of sinter machine and production method of grate bar material
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A production method and technology of locomotives, applied to casting molding equipment, casting molds, cores, etc., can solve the problems of high production costs, achieve good response, improve economic benefits, and enhance market competitiveness
Inactive Publication Date: 2015-05-13
桃江新兴管件有限责任公司
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Problems solved by technology
Although the service life has been greatly improved, and some have even reached the level of imported grates, but the relative production cost has always been high
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Embodiment 1
[0016] A sintering machine trolley furnace grate material, in terms of element mass percentage, its chemical composition includes C: 1% to 1.5%, Si: 1.0% to 2.0%, Cr: 16% to 20%, Al: 3.0% to 7.0%, rare earth elements: 0.05%~0.15%, Mn: 0.5%~1.0%, S<0.02%, P<0.05, the balance is Fe, and the sum of each component is 100%.
[0017] Analysis of the reasons for the failure of the grate bars: First, the grate bars are oxidized by the high temperature of the air during work, and the surface oxidizes and falls off, which makes the gap between the grate bars too large. When the gap exceeds 10mm, the grate bars fail. The second is that when the sintering machine is working without a bottoming material, there will be low-melting-point substances adhering to the grate bars at high temperatures, resulting in smaller gaps between the grate bars, poor ventilation, and failure of the grate bars. The third is that when the grate bar creeps under the action of high temperature and stress for a l...
Embodiment 2
[0053] In this embodiment, the selected chemical components include C: 1.3%, Si: 1.2%, Cr: 17%, Al: 6.0%, rare earth elements: 0.08%, Mn: 0.9%, S<0.02%, P<0.05, and the balance is Fe, the sum of each component is 100%.
[0054] The rest are the same as embodiment 1.
Embodiment 3
[0056] In this embodiment, the selected chemical components include C: 1.1%, Si: 1.8%, Cr: 19%, Al: 4.5%, rare earth elements: 0.15%, Mn: 0.6%, S<0.02%, P<0.05, and the balance is Fe, the sum of each component is 100%.
[0057] The rest are the same as embodiment 1.
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Abstract
The invention discloses a grate bar material of a trolley of a sinter machine. The grate bar material is good in usage effect and low in production cost. The grate bar material is characterized by comprising the following chemical components in percentage by mass: 1-1.5% of C, 1.0-2.0% of Si, 16-20% of Cr, 3.0-7.0% of Al, 0.05-0.15% of rare-earth elements, 0.5-1.0% of Mn, less than 0.02% of S, less than 0.05% of P and the balance of Fe, and the sum of all the components is 100%. The production method comprises the steps of modelling, melting and casting. The service life of grate bars produced by the production method disclosed by the invention is equal to or greater than 12 months, the hardness HBS is equal to or greater than 282, and the fracture rate (when the grate bars drop from a 2-meter-high place) is reduced to 0 from about 5% in orignal. The dosage of precious metal such as chromium and nickel is substantially reduced, and the production technology is simplified, so that the direct production cost is reduced by over 20% than that of an original technology; after about 200 tons of the grate bars are produced and used by users, the response is very good, the economic benefits of enterprises are improved, and the market competitiveness is enhanced.
Description
technical field [0001] The invention relates to an alloy and a production method thereof, in particular to a sintering machine trolley furnace grate material and a production method thereof. Background technique [0002] The grate bar is the main accessory on the trolley of the sintering machine. The function of the grate bar is to form a groove-shaped space with the trolley railing to accommodate and carry mineral materials. The working environment of the grate bar is harsh, and it is oxidized and worn at a high temperature of 800°C to 1000°C. After repeated cycles in the process of heating, cooling, and impact, it is gradually damaged due to oxidation, wear, and deformation. Its damage reason is complicated, belongs to wearing parts, needs a large amount of time and manpower, material resources when replacing, and the length of grate bar service life directly affects production operation rate and production cost. [0003] The grate has successively experienced the process...
Claims
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