CN-122012960-A - Preparation process of nickel-based superalloy plate

CN122012960ACN 122012960 ACN122012960 ACN 122012960ACN-122012960-A

Abstract

The application relates to the technical field of nickel-based alloy preparation, in particular to a preparation process of a nickel-based superalloy plate, which comprises the steps of determining raw materials according to the composition requirements of the nickel-based superalloy plate, smelting the raw materials by a vacuum induction furnace, collecting thermal imaging images at all moments in the furnace during smelting, and collecting the power of a vacuum pump at all moments; determining a first adjusting coefficient and a second adjusting coefficient for adjusting and controlling the melting speed of a vacuum induction furnace, adjusting and controlling the melting speed of the vacuum induction furnace during smelting by using the first adjusting coefficient and the second adjusting coefficient to obtain an alloy ingot after smelting treatment, and carrying out surface treatment on the alloy ingot after electroslag remelting, diffusion annealing, forging cogging, hot rolling cogging wide rolling, finished hot rolling, plate straightening and cutting in sequence to obtain the nickel-based superalloy plate. The application improves the capability of regulating and controlling the melting speed of the vacuum induction furnace.

Inventors

WANG XIAOPING
LUO TONGWEI
SHEN XIAOGANG
NAI QILIANG
SHEN WEIJIE
WU HONGJIAO
LING JUN
QI ZICHEN
ZHANG TAO

Assignees

浙江工业大学
湖州久立永兴特种合金材料有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The preparation process of the nickel-based superalloy plate is characterized by comprising the following steps of: S1, determining raw materials according to the composition requirements of a nickel-based superalloy plate, smelting the raw materials by a vacuum induction furnace, and collecting thermal imaging images at all times in the furnace and power at all times of a vacuum pump during smelting; S2, extracting change trend characteristics of the power at all times in an adjustment period, and determining a first adjustment coefficient for regulating and controlling the melting speed of the vacuum induction furnace; S3, dividing the thermal imaging image at each moment, analyzing the fluctuation and change condition of the temperature of the image area at the same position in the thermal imaging image along with time in an adjustment period, and obtaining a second adjustment coefficient for adjusting and controlling the melting speed of the vacuum induction furnace; s4, regulating and controlling the melting speed of the vacuum induction furnace during melting by using the first regulating coefficient and the second regulating coefficient to obtain an alloy ingot after melting treatment; And S5, sequentially performing electroslag remelting, diffusion annealing, forging cogging, hot rolling cogging wide-spread rolling, hot rolling of finished products, plate straightening and cutting on the alloy ingot, and performing surface treatment on the alloy ingot to obtain the nickel-based superalloy plate.
2. The process for preparing a nickel-base superalloy sheet according to claim 1, wherein the nickel-base superalloy sheet comprises the following components in mass percent: C≤0.1%,Mn≤0.50%,Si≤0.50%,P≤0.015%,S≤0.015%,Cr：20.0~23.0%,Nb：1~1.5%,Ta：1.65~3.15%,Mo：8.0~10.0%,Fe≤5.0%,Al≤0.4%,Ti≤0.4%,Co≤0.08%, The balance of Ni, ni is more than or equal to 58 percent.
3. The process for preparing a nickel-base superalloy plate according to claim 2, wherein the step of melting the raw material by a vacuum induction furnace comprises: Ni and Mo are put into a vacuum induction furnace, vacuumized, melted and refined, then Cr and Nb are added, secondary refining is carried out after melting and refining are finished, al and Ti are added after refining is finished, argon is filled for refining, fine-tuning components are sampled until the components are qualified, and then temperature measurement tapping is carried out to obtain an alloy ingot with the diameter of phi 430-phi 550 mm.
4. The process for preparing a nickel-based superalloy plate according to claim 3, wherein the melting and refining temperature is 1470-1570 ℃, the time is more than or equal to 20min, the secondary refining temperature after melting and refining is 1480-1580 ℃, the time is more than or equal to 25min, the argon filling pressure is 7000-10000 Pa, and the tapping temperature is 1440-1500 ℃.
5. The process for preparing a nickel-base superalloy sheet according to claim 1, wherein the determination of the first adjustment factor comprises: A time sequence decomposition algorithm is adopted to obtain trend items of the power at all times in the adjustment period, linear fitting is carried out on the trend items at all times in the adjustment period according to a time sequence order, and the slope of a fitting straight line is obtained; and carrying out negative correlation mapping and normalization on the slope to obtain the first adjustment coefficient.
6. The process for preparing a nickel-base superalloy sheet according to claim 1, wherein the determination of the second adjustment factor comprises: In the adjustment period, determining a moving standard deviation sequence of a time sequence temperature sequence of an image area at the same position in the thermal imaging image, calculating the average value of all elements in the moving standard deviation sequence, and obtaining fusion results of the average values corresponding to all the same position in the thermal imaging image; and determining the second adjustment coefficient by using the fusion result, wherein the second adjustment coefficient is in negative correlation with the fusion result.
7. The process for preparing a nickel-base superalloy plate according to claim 1, wherein the melting speed of the vacuum induction furnace during the melting is controlled by the following expression: ; for the melting speed of the vacuum induction furnace regulated and controlled in the next regulation period of each regulation period, 、 The melting speed of the vacuum induction furnace is respectively the maximum value and the minimum value when the raw materials are smelted, S is the average value of a first adjustment coefficient and a second adjustment coefficient of each adjustment period, and round is a rounding function.
8. The process for preparing the nickel-based superalloy plate according to claim 1, wherein the electroslag remelting is performed by quaternary premelting to obtain an electroslag ingot with diameter phi 530-phi 660mm, and the diffusion annealing temperature is 1170-1220 ℃.
9. The preparation process of the nickel-based superalloy plate according to claim 8, wherein an electroslag ingot subjected to high-temperature diffusion annealing is subjected to heat preservation at 1160-1180 ℃ for 6-8 hours, a forging slab with the thickness of 150-200 mm and the width of 1100-1400 mm is obtained through tapping forging, the surface of the slab is subjected to full-white grinding, the head and tail of the slab are removed by ultrasonic flaw detection and then subjected to hot rolling, heat preservation at 1160-1180 ℃ for 3-5 hours, turning over for 90 ℃ and rolling into a slab with the width of 190-230 mm and the thickness of 80-100 mm, turning over two fires and rolling into a slab with the thickness of 6-9 mm and the width of 1900 mm-2300 mm, finally, the slab is subjected to hot rolling out of the furnace after heat preservation at 1060-1080 ℃ for 15min, the slab with the thickness of 3.5-5.5 mm, the width of 190-230 mm and the length of 2-15 m is obtained, and the final rolling temperature is more than or equal to 900 ℃.
10. The preparation process of the nickel-based superalloy plate according to claim 9, wherein the final finished plate is subjected to solid solution water-cooling straightening cutting, wherein the solid solution treatment temperature is 1100-1140 ℃, the heat preservation time is 8min, and the surface treatment is any one of sanding, sand blasting and acid washing.

Description

Preparation process of nickel-based superalloy plate Technical Field The application relates to the technical field of nickel-based alloy preparation, in particular to a preparation process of a nickel-based superalloy plate. Background The nickel-based superalloy is a metal material which can still keep excellent performance under the extreme working condition of bearing stress above 600 ℃, has good hot corrosion resistance and oxidation resistance, and is widely applied to working environments such as high temperature, strong acid and alkali, strong oxidation and the like. The existence of inclusions and harmful elements in the nickel-based alloy can damage the uniformity of the alloy structure, so that the stability, mechanical property and corrosion resistance of the finally prepared nickel-based superalloy plate are reduced, and therefore, the nickel-based superalloy raw material is required to be smelted before the nickel-based superalloy plate is prepared, so that the purity of the nickel-based superalloy in the finished nickel-based superalloy plate is improved, and the performance of the finished nickel-based superalloy plate is improved. The duplex smelting process is a common nickel-based superalloy smelting process in the existing nickel-based superalloy plate preparation process, such as a VIM (vacuum induction smelting) process and a PESR (electro slag remelting) process, wherein gas elements, nonmetallic inclusions and harmful substances in the nickel-based superalloy plate are mainly removed in a VIM melting stage. However, when the vacuum induction furnace is used for smelting alloy smelting raw materials of the nickel-based superalloy plate, oxygen in the alloy liquid mainly generates carbon monoxide gas through chemical reaction with carbon in the furnace charge, and the carbon monoxide gas is separated out from the alloy liquid for removal, and the furnace charge is excessively fast added to cause severe carbon-oxygen reaction, so that severe boiling and splashing of the alloy liquid are caused, so that bridging phenomenon easily occurs in the smelting process of the alloy smelting raw materials, the non-uniformity of alloy components is caused by bridging phenomenon, and the performance of a finished product of the final nickel-based superalloy plate is reduced. Therefore, the prior art generally uses a smaller melting speed to slow down the adding speed of furnace burden in the vacuum induction furnace, so as to inhibit bridging phenomenon in the raw material smelting process of the nickel-based superalloy plate, but the determination of the melting speed at present mostly depends on historical experiments, and the determination of the melting speed cannot adapt to the actual dynamic alloy smelting raw material smelting process of the nickel-based superalloy plate, so that the determination of the melting speed has poor adaptability in the whole smelting process, and the too small melting speed has low production efficiency and high loss, and is difficult to balance the production quality, production efficiency and loss of the nickel-based superalloy plate. Disclosure of Invention In order to solve the technical problems, the application provides a preparation process of a nickel-based superalloy plate, which aims to solve the existing problems. The preparation process of the nickel-based superalloy plate adopts the following technical scheme: one embodiment of the application provides a process for preparing a nickel-based superalloy plate, which comprises the following steps: S1, determining raw materials according to the composition requirements of a nickel-based superalloy plate, smelting the raw materials by a vacuum induction furnace, and collecting thermal imaging images at all times in the furnace and power at all times of a vacuum pump during smelting; S2, extracting change trend characteristics of the power at all times in an adjustment period, and determining a first adjustment coefficient for regulating and controlling the melting speed of the vacuum induction furnace; S3, dividing the thermal imaging image at each moment, analyzing the fluctuation and change condition of the temperature of the image area at the same position in the thermal imaging image along with time in an adjustment period, and obtaining a second adjustment coefficient for adjusting and controlling the melting speed of the vacuum induction furnace; s4, regulating and controlling the melting speed of the vacuum induction furnace during melting by using the first regulating coefficient and the second regulating coefficient to obtain an alloy ingot after melting treatment; And S5, sequentially performing electroslag remelting, diffusion annealing, forging cogging, hot rolling cogging wide-spread rolling, hot rolling of finished products, plate straightening and cutting on the alloy ingot, and performing surface treatment on the alloy ingot to obtain the nickel-based superalloy plate. In one embodiment, the