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CN-122013017-A - N08120 nickel-based superalloy steel ingot and preparation method thereof

CN122013017ACN 122013017 ACN122013017 ACN 122013017ACN-122013017-A

Abstract

The invention provides an N08120 nickel-base superalloy steel ingot and a preparation method thereof, and belongs to the technical field of metallurgy. The invention can improve the mechanical property of the nickel-based alloy on the basis of reducing the N content and the Nb+Ta content by adding Zr and limiting the content of Zr and B, can further improve the mechanical property of the nickel-based alloy by adding Hf and limiting the content of Hf and Cr, can further improve the mechanical property of the nickel-based alloy by limiting the total content of Al and Mo, and can further improve the mechanical property of the nickel-based alloy by designing alloy components.

Inventors

  • ZU YUWEI
  • YU GANG
  • FENG SIYANG
  • XU MING
  • QIAO HUAWEI
  • WU TIEMING

Assignees

  • 浙江大隆新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The N08120 nickel-base superalloy steel ingot comprises the following chemical components in percentage by mass of ：Ni 36.5~38%、Cr 25.0~25.4%、C 0.02~0.05%、Si 0.40~0.48%、Mn 0.60~0.70%、P≤0.020%、S≤0.005%、Cu 0.10~0.20%、Al 0.02~0.08%、Ti 0.02~0.05%、Nb+Ta 0.10~0.30%、Mo 0.50~0.75%、W 0.01~0.08%、Co 0.85~1.0%、N 0.15~0.30%、B 0.002~0.005%、O≤10ppm、H≤1.2ppm、Nb 0.60~0.90%、Zr 0.001~0.005%、Hf 0.01~0.05% and the balance of Fe; the total mass percentage of the B and the Zr is 0.004-0.006%; The total mass percentage of the Al and the Mo is 0.55-0.70%; The total mass percentage of the Hf and the Cr is 25.2-25.4%.
  2. 2. The N08120 nickel-base superalloy steel ingot according to claim 1, wherein the chemical composition includes ：Ni 36.8~37.5%、Cr 25.1~25.3%、C 0.03~0.04%、Si 0.42~0.46%、Mn 0.62~0.68%、P≤0.020%、S≤0.005%、Cu 0.12~0.18%、Al 0.03~0.07%、Ti 0.03~0.04%、Nb+Ta 0.15~0.25%、Mo 0.55~0.70%、W 0.02~0.07%、Co 0.88~0.95%、N 0.20~0.25%、B 0.003~0.004%、O≤10ppm、H≤1.2ppm、Nb 0.65~0.85%、Zr 0.002~0.004%、Hf 0.02~0.04% and the balance Fe in mass percent.
  3. 3. The N08120 nickel-base superalloy steel ingot according to claim 2, wherein the chemical composition includes ：Ni 37.0~37.3%、Cr 25.2~25.3%、C 0.03~0.04%、Si 0.43~0.45%、Mn 0.64~0.66%、P≤0.020%、S≤0.005%、Cu 0.14~0.16%、Al 0.04~0.06%、Ti 0.03~0.04%、Nb+Ta 0.18~0.22%、Mo 0.60~0.65%、W 0.03~0.06%、Co 0.90~0.93%、N 0.21~0.24%、B 0.003~0.004%、O≤10ppm、H≤1.2ppm、Nb 0.70~0.80%、Zr 0.003~0.004%、Hf 0.03~0.04% and the balance Fe in mass percent.
  4. 4. The N08120 nickel-base superalloy steel ingot according to claim 1, wherein the total mass percentage of B and Zr is 0.005-0.0055%.
  5. 5. The N08120 nickel-base superalloy steel ingot according to claim 4, wherein the total mass percentage of B and Zr is 0.0052 to 0.0054%.
  6. 6. The N08120 nickel-base superalloy steel ingot according to claim 1, wherein the total mass percentage of Al and Mo is 0.60-0.65%.
  7. 7. The N08120 nickel-base superalloy steel ingot according to claim 6, wherein the total mass percentage of Al and Mo is 0.62-0.64%.
  8. 8. The N08120 nickel-base superalloy steel ingot according to claim 1, wherein the total mass percentage of Hf and Cr is 25.25-25.35%.
  9. 9. The N08120 nickel-base superalloy steel ingot according to claim 8, wherein the total mass percentage of Hf and Cr is 25.3%.
  10. 10. The method for preparing the N08120 nickel-base superalloy steel ingot according to any one of claims 1 to 9, including: and smelting and pouring the raw materials in sequence to obtain the N08120 nickel-base superalloy steel ingot.

Description

N08120 nickel-based superalloy steel ingot and preparation method thereof Technical Field The invention belongs to the technical field of metallurgy, and particularly relates to an N08120 nickel-based superalloy steel ingot and a preparation method thereof. Background The N08120 nickel-based alloy is a widely used high-temperature alloy, and is mainly used for manufacturing high-temperature resistant alloy steel medium plate forgings for polycrystalline silicon reactors for solar photovoltaic power generation, impellers and blades of new energy circulating energy storage performance systems of steam heat pump compressors, medium-pressure regulating valve rods of secondary reheating ultra-supercritical turbines, high-temperature gas cooled reactor condensation air pipe fittings for nuclear power, sealing rings of various specifications, new energy hydrogen atmosphere/hydrocarbon reforming process parts, solar nuclear fusion high-temperature resistant parts and other key parts in the fields of aerospace and aircraft engines. Currently, the chemical components of the N08120 nickel-base alloy include Ni 35~39%、Cr 23~27%、C 0.02~0.10%、Si≤1.00%、Mn≤1.5%、P≤0.040%、S≤0.030%、Cu≤0.50%、Al≤0.40%、Ti≤0.20%、Nb+Ta 0.40~0.90%、Mo≤2.5%、W≤2.5%、Co≤3.0%、N 0.15~0.30%、B≤0.010% and the balance iron (ASTM B366 standard) by mass percent, but the mechanical properties of the nickel-base alloy are poor. Therefore, how to improve the nickel-base alloy to improve the mechanical properties is a technical problem to be solved in the field. Disclosure of Invention The invention aims to provide an N08120 nickel-base superalloy steel ingot and a preparation method thereof. The forging piece prepared from the nickel-based superalloy steel ingot provided by the invention has excellent mechanical properties. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides an N08120 nickel-based superalloy steel ingot, which comprises the following chemical components in percentage by mass, ：Ni 36.5~38%、Cr 25.0~25.4%、C 0.02~0.05%、Si 0.40~0.48%、Mn 0.60~0.70%、P≤0.020%、S≤0.005%、Cu 0.10~0.20%、Al 0.02~0.08%、Ti 0.02~0.05%、Nb+Ta 0.10~0.30%、Mo 0.50~0.75%、W 0.01~0.08%、Co 0.85~1.0%、N 0.15~0.30%、B 0.002~0.005%、O≤10ppm、H≤1.2ppm、Nb 0.60~0.90%、Zr 0.001~0.005%、Hf 0.01~0.05% and the balance of Fe; the total mass percentage of the B and the Zr is 0.004-0.006%; The total mass percentage of the Al and the Mo is 0.55-0.70%; The total mass percentage of the Hf and the Cr is 25.2-25.4%. Preferably, the chemical components comprise ：Ni 36.8~37.5%、Cr 25.1~25.3%、C 0.03~0.04%、Si 0.42~0.46%、Mn 0.62~0.68%、P≤0.020%、S≤0.005%、Cu 0.12~0.18%、Al 0.03~0.07%、Ti 0.03~0.04%、Nb+Ta 0.15~0.25%、Mo 0.55~0.70%、W 0.02~0.07%、Co 0.88~0.95%、N 0.20~0.25%、B 0.003~0.004%、O≤10ppm、H≤1.2ppm、Nb 0.65~0.85%、Zr 0.002~0.004%、Hf 0.02~0.04% and the balance of Fe in percentage by mass. Preferably, the chemical components comprise ：Ni 37.0~37.3%、Cr 25.2~25.3%、C 0.03~0.04%、Si 0.43~0.45%、Mn 0.64~0.66%、P≤0.020%、S≤0.005%、Cu 0.14~0.16%、Al 0.04~0.06%、Ti 0.03~0.04%、Nb+Ta 0.18~0.22%、Mo 0.60~0.65%、W 0.03~0.06%、Co 0.90~0.93%、N 0.21~0.24%、B 0.003~0.004%、O≤10ppm、H≤1.2ppm、Nb 0.70~0.80%、Zr 0.003~0.004%、Hf 0.03~0.04% and the balance of Fe in percentage by mass. Preferably, the total mass percentage of the B and the Zr is 0.005-0.0055%. Preferably, the total mass percentage of the B and the Zr is 0.0052-0.0054%. Preferably, the total mass percentage of Al and Mo is 0.60-0.65%. Preferably, the total mass percentage of Al and Mo is 0.62-0.64%. Preferably, the total mass percentage of the Hf and the Cr is 25.25-25.35%. Preferably, the total mass percentage of Hf and Cr is 25.3%. The invention also provides a preparation method of the N08120 nickel-base superalloy steel ingot, which comprises the following steps: and smelting and pouring the raw materials in sequence to obtain the N08120 nickel-base superalloy steel ingot. The invention provides an N08120 nickel-based superalloy steel ingot, which comprises the following chemical components, by mass, ：Ni 36.5~38% 、Cr 25.0~25.4%、C 0.02~0.05%、Si 0.40~0.48%、Mn 0.60~0.70%、P≤0.020%、S≤0.005%、Cu 0.10~0.20%、Al 0.02~0.08%、Ti 0.02~0.05%、Nb+Ta 0.10~0.30%、Mo 0.50~0.75%、W 0.01~0.08%、Co 0.85~1.0%、N 0.15~0.30%、B 0.002~0.005%、O≤10ppm、H≤1.2ppm、Nb 0.60~0.90%、Zr 0.001~0.005%、Hf 0.01~0.05% and the balance of Fe, wherein the total mass percentage of B and Zr is 0.004-0.006%, the total mass percentage of Al and Mo is 0.55-0.70%, and the total mass percentage of Hf and Cr is 25.2-25.4%. The invention can improve the mechanical property of the nickel-based alloy on the basis of reducing the N content and the Nb+Ta content by adding Zr and limiting the content of Zr and B, can further improve the mechanical property of the nickel-based alloy by adding Hf and limiting the content of Hf and Cr, can further improve the mechanical property of the nickel-based alloy by limiting the total content of Al and Mo, and can further improve the mechanical p