CN112176266A - Control method of GH4105 nickel-based alloy carbide strip structure - Google Patents

Control method of GH4105 nickel-based alloy carbide strip structure Download PDF

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CN112176266A
CN112176266A CN202010923766.2A CN202010923766A CN112176266A CN 112176266 A CN112176266 A CN 112176266A CN 202010923766 A CN202010923766 A CN 202010923766A CN 112176266 A CN112176266 A CN 112176266A
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nickel
alloy
based alloy
control method
carbide
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CN112176266B (en
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姚志浩
李笃锟
董建新
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
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  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention belongs to the technical field of nickel-based wrought superalloy forming, and particularly relates to a control method of a GH4105 nickel-based alloy carbide strip structure, which comprises the following steps: homogenizing the as-cast alloy of the low-carbon GH4105 nickel-based alloy, forging, heating the alloy to a temperature above the re-dissolution temperature of secondary MC carbide at a proper heating rate, preserving heat for a proper time, performing hot compression deformation along the distribution direction of alloy carbide strips, wherein the deformation is 40-60%, and then air-cooling to room temperature. The invention has the beneficial effects that: by adopting the technical scheme, the method can effectively eliminate the carbide strip structure in the GH4105 nickel-based alloy, so that the carbide is distributed more uniformly, and finally the aim of optimizing the alloy performance is fulfilled.

Description

Control method of GH4105 nickel-based alloy carbide strip structure
Technical Field
The invention belongs to the technical field of nickel-based deformation superalloy forming, and particularly relates to a control method of a GH4105 nickel-based alloy carbide strip structure.
Background
With the development of aviation, electric power and petrochemical industry in China, the demand of nickel-based wrought superalloy with excellent high-temperature strength and corrosion resistance is increased year by year, and the GH4105 superalloy has good room-temperature and high-temperature strength and good oxidation resistance, and is suitable for manufacturing turbine blades of aero-engines and various parts. However, due to the high carbon content in the GH4105 nickel-based alloy, a large amount of carbides are often aggregated to form a strip structure in the machining process, so that the grain structure in the alloy is uneven, the alloy performance is seriously influenced, a large amount of alloys are scrapped, and huge economic loss is caused. Therefore, the elimination of the phenomenon of carbide strips in the GH4105 nickel-based alloy becomes a problem which needs to be solved urgently at present, and has important application significance for material production.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method for controlling the strip structure of the carbides of the GH4105 nickel-based alloy, which can make the carbides in the alloy uniformly distributed and effectively improve the strip phenomenon of the carbides, aiming at overcoming the defects in the prior art.
The technical scheme of the invention is as follows: a control method of a GH4105 nickel-based alloy carbide strip structure comprises the following steps:
(1) preparing a low-carbon GH4105 nickel-based alloy, carrying out homogenization treatment, and then forging;
(2) heating the alloy to a temperature above the remelting temperature of the secondary MC carbide (namely the alloy deformation temperature) at a proper heating rate, and keeping the temperature for a proper time;
(3) carrying out hot compression deformation at a proper deformation rate along the distribution direction of the alloy carbide strip, wherein the deformation amount is 40-60%, and cooling the alloy carbide strip to room temperature after deformation.
Further, in the step (1), the content of carbon in the GH4105 nickel-based alloy is in the range of 0.12-0.13%.
Further, in the step (1), a vacuum induction furnace and electroslag remelting or a vacuum induction furnace and vacuum arc remelting or a vacuum induction furnace and vacuum consumable remelting are adopted to smelt into a cast ingot, and then the cast ingot is homogenized and forged.
Further, in the step (2), the alloy deformation temperature is designed to be 1160-1200 ℃.
Further, in the step (2), heating to the processing temperature at the heating rate of 10-20 ℃/s, and preserving heat for 2-3 min.
Further, in the step (3), the compression direction is parallel to the carbide strip direction, i.e. compression is performed along the carbide strip direction.
Further, in the step (3), the deformation rate is required to be 0.01s-1-10s-1In the meantime.
Further, in the step (3), the alloy is compressed to a deformation amount of 40% -60%, and then air-cooled.
The invention has the beneficial effects that: by adopting the technical scheme, the low-carbon content is adopted, the number of carbides can be reduced, the secondary carbides can be redissolved at a higher deformation temperature, secondary carbide strips are prevented from being formed, the carbide strips in the alloy can be stressed, crushed and uniformly distributed by proper deformation, and uniform secondary carbides can be fully precipitated by air cooling after deformation. The comprehensive effect makes the carbide distributed more uniformly and the grain structure uniform, effectively eliminates the carbide stripe structure, and finally achieves the purpose of optimizing the alloy performance.
Drawings
FIG. 1 is a flow chart of a control method of a GH4105 nickel base alloy carbide strip structure.
FIG. 2 is a schematic diagram showing the distribution of the carbide band structure before processing by the control method described in example 1 of the present invention.
FIG. 3 is a schematic view showing the distribution of carbides after machining by the control method described in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be considered in a limiting sense.
As shown in figure 1, the control method of the GH4105 nickel-based alloy carbide strip structure comprises the following steps:
s1) preparing GH4105 nickel-based alloy, carrying out homogenization treatment and then forging;
s2) heating the GH4105 nickel-based alloy treated by the S1) to be above the remelting temperature of the secondary MC carbide at a set heating rate, and preserving heat;
s3), carrying out hot compression deformation on the GH4105 nickel-based alloy subjected to the treatment of S2) at a set deformation temperature along a specific direction at a set deformation rate, and cooling to room temperature after deformation.
The GH4105 nickel-based alloy in the S1) is a GH4105 nickel-based alloy with the carbon content ranging from 0.12% to 0.13%.
And the GH4105 nickel-based alloy in the S1) is smelted into a cast ingot by adopting a vacuum induction furnace and electroslag remelting, a vacuum induction furnace and vacuum arc remelting or a vacuum induction furnace and vacuum consumable remelting.
The heating rate in the S2) is kept at 10-20 ℃/S, and the heat preservation time is 2-3 min.
The remelting temperature of the secondary MC carbide in the S2) is 1160-1200 ℃.
The specific direction in S3) is: the compression direction is parallel to the GH4105 nickel base alloy carbide strip direction, i.e. compression is performed along the carbide strip direction.
The deformation rate in S3) was 0.01S-1-10s-1。
The deformation amount in the S3) is 40-60%.
Example 1
The embodiment comprises the following steps:
(1) preparing low-carbon GH4105 nickel-based alloy, performing homogenization treatment, and forging
The GH4105 nickel-based alloy ingot is prepared by adopting a vacuum induction smelting and vacuum electroslag remelting smelting process, and the alloy ingot mainly comprises the following components: 0.12 percent of C, 15 percent of Cr, 20 percent of Co, 5 percent of Mo, 4.7 percent of Al, 1.65 percent of Ti, 0.5 percent of Fe, 0.0065 percent of B, 0.11 percent of Zr, 0.2 percent of Mn, 0.1 percent of Cu0.1 percent, less than or equal to 0.25 percent of Si, and the balance of Ni. After smelting, the ingot is forged after being subjected to heat treatment at 1150 ℃ for multiplied by 4h/AC +1030 ℃ for multiplied by 16h/AC +700 ℃ for multiplied by 16 h/AC.
The carbides in the alloy are now distributed in distinct longitudinal bands as shown in figure 2.
(2) Preheating treatment
Processing the alloy in the step (1) into a cylindrical sample of phi 10 multiplied by 15, heating the sample to 1160 ℃ at a heating speed of 20 ℃/s, and preserving the heat for 3 minutes.
(3) Deformation treatment
Along the direction of the carbide strip at 1160 ℃ for 0.01s-1Is compressed to a deformation of 50% and then air-cooled to room temperature.
At this time, longitudinal carbide strips do not exist in the alloy, the carbides are randomly and uniformly distributed, and the structure of the carbide strips is effectively controlled, as shown in figure 3.
Example 2
The embodiment comprises the following steps:
(1) preparing low-carbon GH4105 nickel-based alloy, performing homogenization treatment, and forging
The GH4105 nickel-based alloy ingot is prepared by adopting a vacuum induction smelting and vacuum electroslag remelting smelting process, and the alloy ingot mainly comprises the following components: 0.125% of C, 15% of Cr, 20% of Co, 5% of Mo, 4.7% of Al, 1.65% of Ti, 0.5% of Fe, 0.0065% of B, 0.11% of Zr, 0.2% of Mn, 0.1% of Cu0.1%, less than or equal to 0.25% of Si, and the balance of Ni. After smelting, the ingot is forged after being subjected to heat treatment at 1150 ℃ for multiplied by 4h/AC +1030 ℃ for multiplied by 16h/AC +700 ℃ for multiplied by 16 h/AC.
The carbides in the alloy are distributed in a distinct longitudinal strip.
(2) Preheating treatment
Processing the alloy in the step (1) into a cylindrical sample with phi 10 multiplied by 15, heating the sample to 1160 ℃ at a heating speed of 15 ℃/s, and keeping the temperature for 2 minutes.
(3) Deformation treatment
Along the direction of the carbide strip, at 1200 ℃ for 8s-1Is compressed to a deformation of 40% and then air-cooled to room temperature.
At the moment, longitudinal carbide strips do not exist in the alloy, the carbides are randomly and uniformly distributed, and the carbide strip structure is effectively controlled.
Example 3
The embodiment comprises the following steps:
(1) preparing low-carbon GH4105 nickel-based alloy, performing homogenization treatment, and forging
The GH4105 nickel-based alloy ingot is prepared by adopting a vacuum induction smelting and vacuum electroslag remelting smelting process, and the alloy ingot mainly comprises the following components: 0.13 percent of C, 15 percent of Cr, 20 percent of Co, 5 percent of Mo, 4.7 percent of Al, 1.65 percent of Ti, 0.5 percent of Fe, 0.0065 percent of B, 0.11 percent of Zr, 0.2 percent of Mn, 0.1 percent of Cu0.1 percent, less than or equal to 0.25 percent of Si, and the balance of Ni. After smelting, the ingot is forged after being subjected to heat treatment at 1150 ℃ for multiplied by 4h/AC +1030 ℃ for multiplied by 16h/AC +700 ℃ for multiplied by 16 h/AC.
The carbides in the alloy are distributed in a distinct longitudinal strip.
(2) Preheating treatment
Processing the alloy in the step (1) into a cylindrical sample with phi 10 multiplied by 15, heating the sample to 1160 ℃ at a heating speed of 10 ℃/s, and preserving the heat for 2.5 minutes.
(3) Deformation treatment
Along the direction of the carbide strip, at 1180 ℃ for 3s-1Is compressed to a deformation of 60% and then air-cooled to room temperature.
At the moment, longitudinal carbide strips do not exist in the alloy, the carbides are randomly and uniformly distributed, and the carbide strip structure is effectively controlled.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A control method of a GH4105 nickel-based alloy carbide strip structure is characterized by comprising the following steps:
s1) homogenizing the GH4105 nickel-based alloy and then forging;
s2) heating the GH4105 nickel-based alloy treated by the S1) to be above the re-dissolution temperature of the secondary MC carbide at a set heating rate, and preserving heat;
s3), carrying out hot compression deformation on the GH4105 nickel-based alloy subjected to the treatment of S2) at a set deformation temperature along a specific direction at a set deformation rate, and cooling to room temperature after deformation.
2. The control method of claim 1, wherein the carbon content of the GH4105 nickel-based alloy in S1) is in the range of 0.12-0.13%.
3. The control method of claim 2, wherein the GH4105 nickel-based alloy in S1) is an ingot produced by melting with vacuum induction furnace + electroslag remelting, vacuum induction furnace + vacuum arc remelting, or vacuum induction furnace + vacuum consumable remelting.
4. The control method according to claim 3, wherein the heating rate in S2) is 10-20 ℃/S, and the holding time is 2-3 min.
5. The control method according to claim 4, wherein the deformation temperature in S3) is 1160 ℃ -1200 ℃.
6. The control method according to claim 5, wherein the specific direction in S3) is: a direction parallel to the direction of the GH4105 nickel base alloy carbide strip.
7. The control method according to claim 6, wherein the deformation rate in S3) is 0.01S-1-10s-1。
8. The control method according to claim 7, wherein the amount of deformation in S3) is 40% -60%.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211544A (en) * 1983-05-16 1984-11-30 Honda Motor Co Ltd Wear-resistant alloy and valve rocker arm
CN103276163A (en) * 2013-05-24 2013-09-04 许言平 Method for eliminating net-shaped and chain alloy carbides generated from steel containing Cr and Ni during heat treatment
CN103361585A (en) * 2012-04-05 2013-10-23 中国科学院金属研究所 Homogenization treatment process of high-alloying GH742 high temperature alloy
CN110331352A (en) * 2019-08-20 2019-10-15 太原钢铁(集团)有限公司 A kind of diameter forging method controlling nickel-base alloy distribution of carbides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211544A (en) * 1983-05-16 1984-11-30 Honda Motor Co Ltd Wear-resistant alloy and valve rocker arm
CN103361585A (en) * 2012-04-05 2013-10-23 中国科学院金属研究所 Homogenization treatment process of high-alloying GH742 high temperature alloy
CN103276163A (en) * 2013-05-24 2013-09-04 许言平 Method for eliminating net-shaped and chain alloy carbides generated from steel containing Cr and Ni during heat treatment
CN110331352A (en) * 2019-08-20 2019-10-15 太原钢铁(集团)有限公司 A kind of diameter forging method controlling nickel-base alloy distribution of carbides

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