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CN-122007297-A - Method for manufacturing NO6617III alloy

CN122007297ACN 122007297 ACN122007297 ACN 122007297ACN-122007297-A

Abstract

The invention relates to a manufacturing method of an NO6617III alloy, which comprises the following steps of S1, vacuum induction smelting, smelting of metal raw materials in a vacuum induction furnace to obtain electric slag ingot furnace heat preservation, S2, forging deformation, wherein the first step comprises the steps of fully insulating the electric slag ingot, discharging the electric slag ingot from the furnace to chamfer edges, lightly rolling the outer edges for two circles, then returning to the furnace to preserve heat, the second step comprises the steps of homogenizing heat treatment of blanks, upsetting, drawing out the eight directions, finally returning to the furnace to preserve heat, the third step comprises the steps of discharging the blanks from the furnace to obtain a forge piece, finishing and forming, and repeatedly carrying out multiple-firing forging by the same process after finishing the first firing, and the step S3, solid solution treatment comprises the steps of heating the forge piece to 940-960 ℃ along with the furnace to preserve heat, and heating the forge piece to 990-1010 ℃ along with the furnace to cool the forge piece to room temperature.

Inventors

  • YUAN ZHEN
  • Cheng Minda
  • SHEN DAMING

Assignees

  • 振宏重工(江苏)股份有限公司

Dates

Publication Date
20260512
Application Date
20260303

Claims (10)

  1. 1. A method of producing NO6617III alloy, comprising the steps of: s1, vacuum induction smelting, namely putting a metal raw material into a vacuum induction furnace for smelting to obtain an electroslag ingot for later use; s2, forging deformation, which comprises the following steps of; the first step, the electroslag ingot is discharged from the furnace after being fully insulated, edge chamfering is carried out, the outer edge is lightly rolled for two circles, and then the furnace is returned for heat insulation; secondly, performing homogenization heat treatment on the blank, upsetting, drawing out eight directions, and finally returning to the furnace for heat preservation; The third step, the blank is drawn out of the furnace and is finished and formed to obtain a forging piece, and after the first forging with fire is completed, the forging with multiple fires is repeatedly carried out with the same process; step S3, solution treatment, comprising the following steps: the first step, the forging is heated to 940-960 ℃ along with the furnace for heat preservation; and in the second step, heating the forging to 990-1010 ℃ along with a furnace, preserving heat, and then cooling the forging to room temperature.
  2. 2. The method of producing NO6617III alloy according to claim 1, wherein in step S1, the alloy contains Ni in the balance ：Cr、20.0~24.0%;C,0.05~0.15%;Cr、20.0~24.0%;Al、0.8~1.5%;Mo、8.0~10.0%;Co、10~15%;Ti≤0.6%;Si≤1.0%;S≤0.015%;Cu≤0.5%;Mn≤0.10%;Fe≤3.0%;B≤0.006%;% by mass, ni not less than 44.5%.
  3. 3. The method of producing NO6617III alloy according to claim 1 wherein the chamfer angle is 45℃in the first step of step S2.
  4. 4. The method of producing NO6617III alloy according to claim 1, wherein the temperature of the tempering heat preservation in the first step of step S2 is 1120-1160 ℃.
  5. 5. The method for producing NO6617III alloy according to claim 1, wherein in the second step of the step S2, the blank is first heated to + -10 ℃ and kept at a temperature for 4-6 hours, and then heated to 1160 + -10 ℃ and kept at a temperature for 6 hours at a temperature-rising rate of 100 ℃ per hour or less.
  6. 6. The method of producing NO6617III alloy according to claim 1, wherein in the third step of step S2, the forging firing rate is controlled to 2 to 3 times, and the forging ratio is more than 3.
  7. 7. The method of producing NO6617III alloy according to claim 1 wherein in the third step of step S2, the single deformation of the last hot forging is more than 20%.
  8. 8. The method of producing NO6617III alloy according to claim 1, wherein the first step of step S3 is a heat-retaining time of 3 to 4 hours.
  9. 9. The method of producing NO6617III alloy according to claim 8, wherein the holding time is 3 to 4 hours in the second step of step S3.
  10. 10. The method of manufacturing a NO6617III alloy according to claim 1 wherein in the second step of step S3, the forging is cooled by water.

Description

Method for manufacturing NO6617III alloy Technical Field The invention relates to the technical field of high-temperature alloy manufacturing, in particular to a manufacturing method of NO6617III alloy. Background The nickel-based superalloy can maintain good structural strength, wear resistance and structural stability at the working temperature of about 650 ℃, so that the nickel-based superalloy is used as a manufacturing material of equipment parts in the fields of aviation, aerospace, ships and chemical industry. However, in gas turbines, marine steam turbines, turbojet engines and other devices, turbine blades are made of nickel-based superalloy, and are in a state of rotating at a high speed for a long time at an operating temperature close to 1000 ℃, and the turbine blades are subjected to high load, complex stress conditions, so that the mechanical properties of the nickel-based superalloy are reduced, and the service life is shortened. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention Aiming at the defects of the prior art, the invention discloses a manufacturing method of an NO6617III alloy. A method of manufacturing a NO6617III alloy comprising the steps of: s1, vacuum induction smelting, namely putting a metal raw material into a vacuum induction furnace for smelting to obtain an electroslag ingot for later use; s2, forging deformation, which comprises the following steps of; the first step, the electroslag ingot is discharged from the furnace after being fully insulated, edge chamfering is carried out, the outer edge is lightly rolled for two circles, and then the furnace is returned for heat insulation; secondly, performing homogenization heat treatment on the blank, upsetting, drawing out eight directions, and finally returning to the furnace for heat preservation; The third step, the blank is drawn out of the furnace and is finished and formed to obtain a forging piece, and after the first forging with fire is completed, the forging with multiple fires is repeatedly carried out with the same process; step S3, solution treatment, comprising the following steps: the first step, the forging is heated to 940-960 ℃ along with the furnace for heat preservation; and in the second step, heating the forging to 990-1010 ℃ along with a furnace, preserving heat, and then cooling the forging to room temperature. Further, in step S1, the alloy comprises the balance of Ni, ni being more than or equal to 44.5%, counted in mass percent, of elements ：Cr、20.0~24.0%;C,0.05~0.15%;Cr、20.0~24.0%;Al、0.8~1.5%;Mo、8.0~10.0%;Co、10~15%;Ti≤0.6%;Si≤1.0%;S≤0.015%;Cu≤0.5%;Mn≤0.10%;Fe≤3.0%;B≤0.006%;. Further, in the first step of step S2, the chamfer angle is 45 °. Further, in the first step of step S2, the temperature range of the heat preservation of the furnace is 1120-1160 ℃. Further, in the second step of the step S2, the blank is heated to 950+/-10 ℃ and is kept warm for 4-6 hours, and then the temperature is raised to 1160+/-10 ℃ and is kept warm for 6 hours at the temperature raising rate of less than or equal to 100 ℃ per hour. Further, in the third step of the step S2, the forging firing rate is controlled to be 2 to 3 times, and the forging ratio is greater than 3. Further, in the third step of step S2, the single deformation amount of the last firing is greater than 20%. Further, in the first step of the step S3, the heat preservation time ranges from 3 to 4 hours. Further, in the second step of the step S3, the heat preservation time ranges from 3 to 4 hours. Further, in the second step of step S3, the forging is cooled by water. The invention has the advantages that: 1. In the smelting and deforming process of the alloy, due to different diffusion capacities of various elements, the nickel-based superalloy is subjected to multiple firing forging deformation and solution treatment in the smelting and deforming process, the solution tempering temperature is above the dissolution temperature of a strengthening phase, the original as-cast structure is gradually dissolved and the single-phase structure is dissolved in a solid solution manner, in the solid solution process, the metal elements are re-dissolved into the single-phase structure in a solid solution manner, coarse segregation structures in the structure are eliminated, the grain structure is refined, a stable strengthening phase structure is formed, the mechanical property of the alloy at a high temperature is improved, and the service life at a high temperature is prolonged. 2. In the first-stage solid solution process, a composite phase of gamma phase and a small amount of gamma 、 phase is formed, along with the heat preservation, refractory element segregation coarse crystal structure is gradually melted and