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CN-122013039-A - Manufacturing method of iron-nickel-based heat-resistant alloy and iron-nickel-based heat-resistant alloy plate

CN122013039ACN 122013039 ACN122013039 ACN 122013039ACN-122013039-A

Abstract

The invention discloses an iron-nickel-based heat-resistant alloy and a manufacturing method of an iron-nickel-based heat-resistant alloy plate, wherein the chemical composition of the iron-nickel-based heat-resistant alloy is ：C：0.05~0.10%、Mn：1.0~2.0%、Si：1.0~2.5%、Cr：19.0~22.0%、Ni：35.0~37.0%、Ti：0.10~0.30%、Nb：0.20~0.50%、Al：0.20~0.50%、Co：0.30~0.70%、P≤0.015%、S≤0.002%、Pb≤0.003%、Sn≤0.005%、N≤0.012%、B：0.003~0.006%,, and 0.15-2.5 xw Si /w Cr ≤0.35、[0.15+4(w C +w N )]≤(w Nb +w Ti -0.80, and the manufacturing method of the iron-nickel-based heat-resistant alloy plate comprises the steps of smelting, electroslag remelting, forging cogging, plate rolling and plate solution treatment. The iron-nickel-based heat-resistant alloy and the plate have excellent high-temperature oxidation resistance, anti-carbonization performance, corrosion resistance, high-temperature strength and high-temperature creep resistance, and are suitable for long-term use in high-temperature carburized medium environments.

Inventors

  • LI SHA
  • GU Yu
  • WANG YAN
  • LI JIANCHUN

Assignees

  • 山西太钢不锈钢股份有限公司

Dates

Publication Date
20260512
Application Date
20260204

Claims (7)

  1. 1. The Fe-Ni based heat-resistant alloy is characterized in that the Fe-Ni based heat-resistant alloy comprises the following chemical components by mass percent ：C：0.05~0.10%、Mn：1.0~2.0%、Si：1.0~2.5%、Cr：19.0~22.0%、Ni：35.0~37.0%、Ti：0.10~0.30%、Nb：0.20~0.50%、Al：0.20~0.50%、Co：0.30~0.70%、P≤0.015%、S≤0.002%、Pb≤0.003%、Sn≤0.005%、N≤0.012%、B：0.003~0.006%, and the balance of Fe and unavoidable impurities.
  2. 2. The iron-nickel-based heat-resistant alloy according to claim 1, wherein the mass percentage content of Si and Cr in the iron-nickel-based heat-resistant alloy satisfies 0.15≤2.5Xw Si /w Cr ≤0.35, wherein w Si 、w Cr represents the content values of the elements Si and Cr in mass percentage, respectively.
  3. 3. The iron-nickel-based heat-resistant alloy according to claim 2, wherein the mass percentage of Nb and Ti in the iron-nickel-based heat-resistant alloy satisfies [0.15+4 (w C +w N )]≤(w Nb +w Ti ). Ltoreq.0.80, wherein w C 、w N 、w Nb 、w Ti represents the content values of the element C, N, nb and Ti in mass percentage, respectively.
  4. 4. The iron-nickel-based heat-resistant alloy according to claim 3, wherein the chemical components of the iron-nickel-based heat-resistant alloy are ：C：0.05~0.08%、Mn：1.0~1.5%、Si：1.5~2.5%、Cr：19.5~21.5%、Ni：35.5~36.5%、Ti：0.15~0.25%、Nb：0.25~0.45%、Al：0.20~0.30%、Co：0.40~0.60%、P≤0.012%、S≤0.0015%、Pb≤0.002%、Sn≤0.004%、N≤0.011%、B：0.004~0.005%,% by mass and the balance of Fe and unavoidable impurities, and the mass percentage of Si and Cr is 0.17-2.5 xw Si /w Cr -0.32, and the mass percentage of Nb and Ti is [0.15+4 (w C +w N )]≤(w Nb +w Ti ) -0.70.
  5. 5. The manufacturing method of the iron-nickel-based heat-resistant alloy plate is characterized by comprising the following steps of: Smelting by adopting an intermediate frequency furnace, AOD and LF, wherein the chemical components of the iron-nickel-based heat-resistant alloy molten steel are controlled to ：C：0.05~0.10%、Mn：1.0~2.0%、Si：1.0~2.5%、Cr：19.0~22.0%、Ni：35.0~37.0%、Ti：0.10~0.30%、Nb：0.20~0.50%、Al：0.20~0.50%、Co：0.30~0.70%、P≤0.015%、S≤0.002%、Pb≤0.003%、Sn≤0.005%、N≤0.012%、B：0.003~0.006%, by mass percent, and the balance of Fe and unavoidable impurities, wherein the mass percent of Si and Cr is more than or equal to 0.15 and less than or equal to 2.5 xw Si /w Cr and less than or equal to 0.35, and the mass percent of Nb and Ti is more than or equal to [0.15+4 (w C +w N )]≤(w Nb +w Ti ) and less than or equal to 0.80, wherein w Si 、w Cr 、w C 、w N 、w Nb 、w Ti respectively represents the content values of elements Si, cr, C, N, nb and Ti in mass percent; electroslag remelting, namely die casting the iron-nickel-based heat-resistant alloy molten steel into an electrode blank, and carrying out electroslag remelting smelting after the electrode blank is peeled to obtain an electroslag ingot; Forging and cogging, namely heating an electroslag ingot, and then forging and cogging, wherein when the electroslag ingot is heated, the temperature of the electroslag ingot is controlled to be less than or equal to 500 ℃, the temperature is raised to 1100+/-10 ℃ at the temperature rising speed of 70-80 ℃ per hour after the electroslag ingot is charged into the furnace, the temperature is kept for 5-6 hours, then the temperature is raised to 1220+/-10 ℃ at the temperature rising speed of 150-160 ℃ per hour, the heat-keeping time is controlled according to the diameter of the electroslag ingot multiplied by 0.55min/mm+ (7-9) h, and after the heat keeping is finished, the electroslag ingot is discharged from the furnace and forged, and the total compression ratio of forging is controlled to be more than 3.5; The plate rolling comprises two rolling processes, wherein the first rolling process comprises the steps of controlling the heating temperature of a plate blank to 1230+/-10 ℃, controlling the final rolling temperature to be more than 900 ℃ and controlling the deformation to be more than 55 percent, and the second rolling process comprises the steps of controlling the heating temperature of the plate blank to 1200+/-10 ℃, controlling the final rolling temperature to be more than 900 ℃ and controlling the deformation to be more than 75 percent; And (3) carrying out plate solid solution treatment, namely controlling the solid solution treatment temperature to 1140+/-10 ℃, controlling the heat preservation time to be 3-3.5 min/mm based on the thickness of the plate, and carrying out water cooling after heat preservation.
  6. 6. The method for producing an iron-nickel-based heat-resistant alloy sheet according to claim 5, wherein in the electroslag remelting step, the diameter specification of the electroslag ingot is controlled to be 500~550mm。
  7. 7. The method for producing iron-nickel-based heat-resistant alloy sheet material according to claim 5, wherein in the forging cogging step, the final forging temperature is controlled to be not less than 900 ℃, the forging adopts a 'one pier + multiple firing drawing' mode, and the upsetting deformation is controlled to be 50%.

Description

Manufacturing method of iron-nickel-based heat-resistant alloy and iron-nickel-based heat-resistant alloy plate Technical Field The invention belongs to the technical field of special material manufacturing, and particularly relates to an iron-nickel-based heat-resistant alloy and an iron-nickel-based heat-resistant alloy plate manufacturing method. Background The Fe-Ni based heat-resistant alloy is a material which is excellent in high-temperature and corrosion environments, has higher high-temperature strength and creep resistance and excellent oxidation resistance, carburization resistance, sulfuration resistance and the like compared with austenitic stainless steel, and has obvious cost advantages compared with nickel-based heat-resistant alloy. Therefore, the Fe-Ni-based heat-resistant alloy is an ideal choice for the situation that the performance of stainless steel is insufficient and the performance of the Ni-based heat-resistant alloy is excessive and the cost is considered, and is widely applied to the manufacturing of key equipment in the fields of heat exchangers, petrochemical industry and the like. At present, in the fields of high temperature, carburization, nitriding media and the like, such as carbon fiber carbonization furnace inner containers, chemical reactors, carburization furnace parts and the like, heat-resistant stainless steel 310S is generally adopted, the heat-resistant stainless steel is in a carburization environment with high temperature of 900-1000 ℃ and strong, serious carburization phenomenon occurs in the inner part of the furnace inner container after a period of operation, local corrosion and perforation are carried out, the service life is obviously reduced, in addition, the furnace body can deform in the long-term use process at high temperature, and production and maintenance are stopped, so that the production operation is influenced. Therefore, there is a need to develop an iron-nickel-based heat-resistant alloy and a sheet product thereof having higher oxidation resistance, superior resistance to carburization and excellent high-temperature strength. Disclosure of Invention In order to solve part or all of the technical problems in the prior art, the invention provides an iron-nickel-based heat-resistant alloy and a manufacturing method of an iron-nickel-based heat-resistant alloy plate. The iron-nickel-based heat-resistant alloy provided by the invention comprises the following chemical components by mass percent ：C：0.05~0.10%、Mn：1.0~2.0%、Si：1.0~2.5%、Cr：19.0~22.0%、Ni：35.0~37.0%、Ti：0.10~0.30%、Nb：0.20~0.50%、Al：0.20~0.50%、Co：0.30~0.70%、P≤0.015%、S≤0.002%、Pb≤0.003%、Sn≤0.005%、N≤0.012%、B：0.003~0.006%, and the balance of Fe and unavoidable impurities. Further, the mass percentage content of Si and Cr in the iron-nickel-based heat-resistant alloy is more than or equal to 0.15 and less than or equal to 2.5 xw Si/wCr and less than or equal to 0.35, wherein w Si、wCr respectively represents the content values of the elements Si and Cr in mass percentage. Further, the mass percentage of Nb and Ti in the iron-nickel-based heat-resistant alloy meets the requirement that [0.15+4 (w C+wN)]≤(wNb+wTi) ] is less than or equal to 0.80, wherein w C、wN、wNb、wTi respectively represents the content values of elements C, N, nb and Ti in mass percentage. Preferably, the iron-nickel-based heat-resistant alloy comprises the following chemical components of ：C：0.05~0.08%、Mn：1.0~1.5%、Si：1.5~2.5%、Cr：19.5~21.5%、Ni：35.5~36.5%、Ti：0.15~0.25%、Nb：0.25~0.45%、Al：0.20~0.30%、Co：0.40~0.60%、P≤0.012%、S≤0.0015%、Pb≤0.002%、Sn≤0.004%、N≤0.011%、B：0.004~0.005%, percent by mass of Fe and unavoidable impurities, wherein the mass percent of Si and Cr is more than or equal to 0.17 and less than or equal to 2.5 xw Si/wC r and less than or equal to 0.32, and the mass percent of Nb and Ti is more than or equal to 0.15+4 (w C+wN)]≤(wNb+wTi) and less than or equal to 0.70. The manufacturing method of the iron-nickel-based heat-resistant alloy plate provided by the invention comprises the following steps: Smelting by adopting an intermediate frequency furnace, AOD and LF, wherein the chemical components of the iron-nickel-based heat-resistant alloy molten steel are controlled to ：C：0.05~0.10%、Mn：1.0~2.0%、Si：1.0~2.5%、Cr：19.0~22.0%、Ni：35.0~37.0%、Ti：0.10~0.30%、Nb：0.20~0.50%、Al：0.20~0.50%、Co：0.30~0.70%、P≤0.015%、S≤0.002%、Pb≤0.003%、Sn≤0.005%、N≤0.012%、B：0.003~0.006%, by mass percent, and the balance of Fe and unavoidable impurities, wherein the mass percent of Si and Cr is more than or equal to 0.15 and less than or equal to 2.5 xw Si/wCr and less than or equal to 0.35, and the mass percent of Nb and Ti is more than or equal to [0.15+4 (w C+wN)]≤(wNb+wTi) and less than or equal to 0.80, wherein w Si、wCr、wC、wN、wNb、wTi respectively represents the content values of elements Si, cr, C, N, nb and Ti in mass percent; electroslag remelting, namely die casting the iron-nickel-based heat-resistant alloy molten steel into an electrode blank, a