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Chromium, nickel alloy and method for producing high-temperature dust-corrosion-resistant furnace tube by centrifugal casting of the alloy

A technology of centrifugal casting and nickel alloy, which is applied in the direction of boiler water pipes, boiler smoke pipes/fire pipes, components of steam boilers, etc., can solve the problems of long delivery period, high production cost, expensive price, etc., and overcome the problem of poor fluidity Poor, low cost, simple method effect

Active Publication Date: 2016-04-27
QINGDAO NPA IND
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Problems solved by technology

[0002] The alloy furnace tube required for petrochemical high-temperature equipment needs to be sufficiently resistant to metal dust corrosion and hydrogen corrosion. At present, alloy furnace tubes that can resist metal dust corrosion and hydrogen corrosion are produced. The more reliable alloy material is 602CA, which is not yet available in my country. Manufacturers who produce this material order the material from abroad, which is not only expensive but also has a long lead time; the rolling method of producing alloy furnace tubes with 602CA material has complicated procedures and high production costs

Method used

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Embodiment

[0008] The chromium and nickel alloy of the present embodiment and the method for centrifugally casting the alloy to produce a furnace tube resistant to high-temperature dusting and corrosion, the chemical components of the chromium and nickel alloy are as follows: Si: 0.3%-0.5%, Mn: 0.3%-0.5 %, P≤0.02%, S≤0.01%, Cr: 24%-26%, Ni: 59.3%-65.5%, Mo≤0.5%, Cu: 0.03%-0.05%, Al: 1.8%-2.4%, remainder The amount is the microalloying elements Ti, Zr, Re. The method of producing high-temperature dust corrosion-resistant furnace tubes by centrifugal casting of chromium and nickel alloys includes alloy smelting and centrifugal casting. The specific steps are as follows: (1) alloy smelting, melting ferrochrome in an electric furnace, and then adding nickel plate and ferromolybdenum , ferrosilicon, ferromanganese, and copper alloys, control the carbon content to meet the requirements, adjust the composition before the furnace to meet the requirements, raise the melt temperature to 1600°C, ad...

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Abstract

The invention discloses a novel chromium-nickel alloy and a method for centrifugally casting and producing a high-temperature dusting corrosion resistant furnace tube by using the alloy. The contents of chemical ingredients of the novel chromium-nickel alloy are as follows: 0.3-0.5% of Si, 0.3-0.5% of Mn, not more than 0.02% of P, not more than 0.01% of S, 24-26% of Cr, 59.3-65.5% of Ni, not more than 0.5% of Mo, 0.03-0.05% of Cu, 1.8-2.4% of Al, and the balance of micro alloying elements, including Ti, Zr and Re. The novel chromium-nickel alloy is adopted to produce the high-temperature dusting corrosion resistant furnace tube through a centrifugal casting method, the produced high-temperature dusting corrosion resistant furnace tube can replace an imported rolled 602CA alloy furnace tube, the requirement of a petrochemical high temperature device on an alloy furnace tube with metal powder dusting corrosion resistance and hydrogen resistance can be met, and a methanol device can produce methanol through recycled waste gases and tail gases.

Description

technical field [0001] The invention belongs to the technical field of alloy metal materials, and in particular relates to an alloy material and a method for producing an alloy furnace tube resistant to high-temperature metal dusting by using the alloy material. Background technique [0002] The alloy furnace tube required for petrochemical high-temperature equipment needs to be sufficiently resistant to metal dust corrosion and hydrogen corrosion. At present, alloy furnace tubes that can resist metal dust corrosion and hydrogen corrosion are produced. The more reliable alloy material is 602CA, which is not yet available in my country. Manufacturers who produce this material order the material from abroad, which is not only expensive but also has a long delivery period; the rolling method of producing alloy furnace tubes with 602CA material has complicated procedures and high production costs. Contents of the invention [0003] In order to overcome the above-mentioned techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C1/03B22D13/02F16L9/02F22B37/04F22B37/06F22B37/10
Inventor 吴永华
Owner QINGDAO NPA IND
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