Chromium, nickel alloy anti-high temperature dust corrosion corrosion furnace tube and its centrifugal casting production method

Abstract

The invention discloses a chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube and a centrifugal casting production method thereof. The chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube comprises the following chemical components in percentage by weight: 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 mechanical performances of the chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube are as follows: the normal-temperature mechanical performances are as follows: the sigma s is not lower than 250 MPa, the sigma b is not lower than 450 MPa and the delta 5 is not lower than 15%; the tensile properties under the temperature condition of 700 DEG C are as follows: the sigma b is not lower than 170 MPa, and the delta 5 is not lower than 20%. The chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube can be used for replacing an imported rolled 602CA alloy furnace tube, so that a problem that a metal dusting corrosion and hydrogen corrosion resistant alloy furnace tube is needed for a petrochemical high-temperature device is solved, and therefore, a methanol device can be used for producing methanol by utilizing waste gas and tail gas recycling.

Description

technical field [0001] The invention belongs to the technical field of high-performance alloy furnace tubes, and in particular relates to a chromium-nickel alloy anti-high-temperature dust-corrosion furnace tube and a production method thereof. 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 currently available in China. Manufacturers who produce this material order the material from abroad, which is not only expensive but also has a long delivery period; the production of alloy furnace tubes using 602CA material adopts a rolling method, which not only has a complicated process, but also has high production costs. Contents of the invention [0003] In order to overcome the a...

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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 currently available in China. Manufacturers who produce this kind of material, ordering the material abroad is not only expensive but also has a long lead time; using 602CA material to produce alloy furnace tubes adopts rolling method, not only the process is complicated, but also the production cost is high

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