CN114799000A - Preparation method of GH4169 alloy small-size diameter forging bar - Google Patents
Preparation method of GH4169 alloy small-size diameter forging bar Download PDFInfo
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- CN114799000A CN114799000A CN202210287292.6A CN202210287292A CN114799000A CN 114799000 A CN114799000 A CN 114799000A CN 202210287292 A CN202210287292 A CN 202210287292A CN 114799000 A CN114799000 A CN 114799000A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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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
Abstract
The invention provides a preparation method of a GH4169 alloy small-size diameter forging bar, which specifically comprises the following steps: obtaining an ingot of GH4169 alloy through a triple smelting process of VIM + ESR + VAR; carrying out high-temperature homogenization treatment on the obtained GH4169 alloy cast ingot; processing by an 80MN fast forging machine to obtain the required fast forging cogging bar; and performing radial forging processing by using a 1800t large precision forging machine to obtain the bar material of the GH4169 alloy phi 100-150 mm. The bar obtained by the invention has good overall structure uniformity, and is fully recrystallized from the center to the edge of the bar; the defects of fast forging and processing small-specification bars are overcome, and the production efficiency is improved; the forging yield of the bar is greatly improved and can reach 70%; the ultrasonic inspection is qualified, and the level of phi 0.8-8dB is used for flaw detection.
Description
Technical Field
The invention relates to the technical field of hot processing of nickel-based wrought superalloy, in particular to a preparation method of a GH4169 alloy small-size diameter forged bar.
Background
The GH4169 alloy is a common precipitation strengthening type nickel-based high-temperature alloy, has excellent comprehensive performance within the temperature range of 0-650 ℃, has the characteristics of low cost and high utilization rate in the high-temperature alloy, and has extremely wide application in the fields of aviation, aerospace, oceans and the like. At present, among the mass produced GH4169 alloys, the bar of wrought superalloy GH4169 is the most used.
Compared with other wrought high-temperature alloys, the GH4169 alloy has the largest content of strengthening phase species, and the strengthening phases gamma '(content of 15 wt%) and gamma' (content of 5 wt%) in the alloy play a main strengthening role, and the delta phase with a certain content in the alloy has a dissolution temperature of 1020 ℃, so that the growth of crystal grains is inhibited by a certain amount of precipitation pinning grain boundaries in the reheating processing process, and the final service performance is improved by influencing the structure of the alloy. Therefore, during the hot working process of the GH4169 alloy, the use performance can be improved by designing the proper temperature and deformation.
Under the existing hot working condition, the fast forging machine is used for producing small-specification bars, and has the defects of more deformation dead zones, uneven structure, low production efficiency and high cost of used equipment. According to the invention, the integral structure uniformity of the small-specification bar material formed by regulating and controlling the intermediate blank structure obtained by rapid forging and cogging and then finish forging is good, and meanwhile, the productivity and yield of the GH4169 alloy small-specification bar material are effectively improved, so that the forging yield can reach 70%.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of a GH4169 alloy small-size diameter forged bar, so as to solve the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a GH4169 alloy small-size diameter forged bar specifically comprises the following steps:
step 1: smelting, namely obtaining an ingot of GH4169 alloy through a triple smelting process of VIM + ESR + VAR;
step 2: homogenizing, namely performing high-temperature homogenizing treatment on the GH4169 alloy cast ingot obtained in the step 1;
and step 3: fast forging and cogging, namely processing the cast ingot in the step 2 by an 80MN fast forging machine to obtain a required fast forging and cogging bar;
and 4, step 4: and (3) performing radial forging on the bar material obtained in the step (3) through an 1800t large precision forging machine to obtain the bar material of the GH4169 alloy phi 100-150 mm.
Preferably, the ingot casting specification of the GH4169 alloy obtained in the step 1 is phi 470-550 mm in diameter and 1100-1400 mm in length.
Preferably, the temperature for homogenizing the high temperature in the step 2 is 1160-1210 ℃, and the heat preservation time is more than or equal to 50 h.
Preferably, the specific method for machining the 80MN quick forging machine in the step 3 comprises the following steps: carrying out pier drawing deformation on the obtained cast ingot by 3-5 sparks, wherein the deformation amount is 20-30%, and the deformation temperature is 1100-1150%; then drawing and deforming by 2-3 fire, wherein the deformation amount is 30% -40%, and the deformation temperature is 1000-1050 ℃.
Preferably, the specific method for the radial forging in the step 4 is as follows: the bar with the required specification is prepared by adopting a one-fire multi-pass deformation mode, the total pass deformation is 2-4, the deformation of each pass is 20-30%, and the final pass deformation is 5-10%.
Compared with the prior art, the invention has the following beneficial effects: the whole structure uniformity of the bar is good, and the bar is fully recrystallized from the center to the edge; the defects of fast forging and processing small-specification bars are overcome, and the production efficiency is improved; the forging yield of the bar is greatly improved and can reach 70%; the ultrasonic inspection is qualified, and the level of phi 0.8-8dB is used for flaw detection.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive effort.
FIG. 1 shows the high power structure of the center position of a phi 140 bar;
FIG. 2 is a high power structure of R/2 position of a phi 140 bar;
fig. 3 shows the high power structure of the edge position of a phi 140 bar material.
FIG. 4 is a high power structure of the central position of a phi 150 bar material;
FIG. 5 is a high power structure of the R/2 position of a phi 150 bar;
fig. 6 shows the high power structure of the edge position of a phi 150 bar material.
FIG. 7 is a high power structure of the center position of a phi 120 bar;
FIG. 8 is a high power structure of the R/2 position of a bar of phi 120;
fig. 9 shows the high power structure of the edge position of the phi 120 bar.
Detailed Description
In order to make the technical means, the creation features, the work flow and the using method of the present invention easily understand and understand the purpose and the efficacy, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, and other conclusions derived from non-inventive extensions, are within the scope of the present invention.
Example 1
Smelting, and obtaining an ingot of the GH4169 alloy through a triple smelting process of VIM + ESR + VAR. The diameter of the cast ingot is phi 490mm, and the length is 1250 mm;
homogenizing, designing a temperature step, ensuring that the GH4169 alloy can have enough heat preservation time within the temperature range of 1160-1210 ℃, eliminating the segregation of cast ingots, wherein the heat preservation time is more than or equal to 50 h;
and (5) rapidly forging and cogging, and processing by adopting a continuous remelting heating forging mode. Firstly, carrying out upsetting deformation on the obtained cast ingot by 3-5 sparks, wherein the deformation amount is 27%, and the deformation temperature is 1100-1150 ℃; then drawing and deforming by 2-3 fire, wherein the deformation amount is 35%, and the deformation temperature is 1000-1050 ℃; obtaining a fast forging cogging specification of phi 250 mm;
adding a point grinding machine, and performing local injury clearing treatment on the bar subjected to rapid forging and cogging;
and (3) radial forging to obtain a material, namely processing and forming the fast forging rod material by a large precision forging machine in a one-fire multi-pass deformation mode. Processing is carried out after heating and heat preservation, the deformation in the first passes is 25 percent, and the deformation in the last pass is 10 percent;
finally, obtaining the GH4169 alloy bar with the specification of phi 140, wherein the overall structure of the bar is shown in figures 1, 2 and 3.
Example 2
Smelting, and obtaining an ingot of the GH4169 alloy through a triple smelting process of VIM + ESR + VAR. The diameter of the cast ingot is phi 500mm, and the length of the cast ingot is 1300 mm;
homogenizing, designing a temperature step, ensuring that the GH4169 alloy can have enough heat preservation time within the temperature range of 1160-1210 ℃, eliminating the segregation of cast ingots, wherein the heat preservation time is more than or equal to 50 h;
and (5) rapidly forging and cogging, and processing by adopting a continuous remelting heating forging mode. Firstly, carrying out upsetting deformation on the obtained cast ingot by 3-5 sparks, wherein the deformation amount is 26%, and the deformation temperature is 1100-1150 ℃; then drawing and deforming by 2-3 fire, wherein the deformation amount is 37%, and the deformation temperature is 1000-1050 ℃; obtaining a fast forging cogging specification of phi 260 mm;
adding a point grinding machine, and performing local injury clearing treatment on the bar subjected to rapid forging and cogging;
and (3) radial forging to obtain a material, namely processing and forming the fast forging rod material by a large precision forging machine in a one-fire multi-pass deformation mode. The processing is carried out after heating and heat preservation, the deformation is designed to be 26% in the first passes, and the deformation in the last pass is 8%;
finally obtaining the GH4169 alloy bar with the phi 150 specification, wherein the overall structure of the bar is shown in figures 4, 5 and 6.
Example 3
Smelting, and obtaining an ingot of the GH4169 alloy through a triple smelting process of VIM + ESR + VAR. The diameter of the cast ingot is phi 490mm, and the length is 1150 mm;
homogenizing, designing a temperature step, ensuring that the GH4169 alloy can have enough heat preservation time within the temperature range of 1160-1210 ℃, eliminating the segregation of cast ingots, wherein the heat preservation time is more than or equal to 50 h;
and (5) rapidly forging and cogging, and processing by adopting a continuous remelting heating forging mode. Firstly, carrying out upsetting deformation on the obtained cast ingot by 3-5 sparks, wherein the deformation amount is 26%, and the deformation temperature is 1100-1150 ℃; then drawing and deforming by 2-3 fire, wherein the deformation amount is 37%, and the deformation temperature is 1000-1050 ℃; obtaining a rapid forging cogging specification of phi 210 mm;
adding a point grinding machine, and performing local injury clearing treatment on the bar subjected to rapid forging and cogging;
and (3) radial forging to obtain a material, namely processing and forming the fast forging rod material by a large precision forging machine in a one-fire multi-pass deformation mode. The processing is carried out after heating and heat preservation, the deformation is designed to be 26% in the first passes, and the deformation in the last pass is 8%;
finally, obtaining the GH4169 alloy bar with the phi 120 specification, wherein the overall structure of the bar is shown in figures 7, 8 and 9.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. 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 (5)
1. A preparation method of a GH4169 alloy small-size diameter forged bar is characterized by comprising the following steps:
step 1: smelting, namely obtaining an ingot of GH4169 alloy through a triple smelting process of VIM + ESR + VAR;
step 2: homogenizing, namely performing high-temperature homogenizing treatment on the GH4169 alloy cast ingot obtained in the step 1;
and step 3: fast forging and cogging, namely processing the cast ingot in the step 2 by an 80MN fast forging machine to obtain a required fast forging and cogging bar;
and 4, step 4: and (3) performing radial forging on the bar material obtained in the step (3) through an 1800t large precision forging machine to obtain the bar material of the GH4169 alloy phi 100-150 mm.
2. The preparation method of the GH4169 alloy small-gauge diameter forged bar material as claimed in claim 1, wherein the method comprises the following steps: the ingot casting specification of the GH4169 alloy obtained in the step 1 is as follows: the diameter is 470-550 mm, and the length is 1100-1400 mm.
3. The preparation method of the GH4169 alloy small-gauge diameter forged bar material as claimed in claim 1, wherein the method comprises the following steps: the temperature for homogenizing the high temperature in the step 2 is 1160-1210 ℃, and the heat preservation time is more than or equal to 50 h.
4. The preparation method of the GH4169 alloy small-gauge diameter forged bar material as claimed in claim 1, wherein the method comprises the following steps: the specific method for machining the 80MN quick forging machine in the step 3 comprises the following steps: carrying out pier drawing deformation on the obtained cast ingot by 3-5 sparks, wherein the deformation amount is 20-30%, and the deformation temperature is 1100-1150%; then drawing and deforming by 2-3 fire, wherein the deformation amount is 30% -40%, and the deformation temperature is 1000-1050 ℃.
5. The preparation method of the GH4169 alloy small-gauge diameter forged bar material as claimed in claim 1, wherein the method comprises the following steps: the specific method for the radial forging in the step 4 comprises the following steps: the bar with the required specification is prepared by adopting a one-fire multi-pass deformation mode, the total pass deformation is 2-4, the deformation amount of each pass is 20-30%, and the final pass deformation is 5-10%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492906A (en) * | 2011-12-29 | 2012-06-13 | 钢铁研究总院 | Forging method of high-temperature alloy fine-grained bars |
| CN105331912A (en) * | 2015-11-27 | 2016-02-17 | 西部超导材料科技股份有限公司 | GH4169 high-temperature alloy bar and manufacturing method thereof |
| CN106868436A (en) * | 2017-01-18 | 2017-06-20 | 抚顺特殊钢股份有限公司 | A kind of fast footpath forging Joint Production GH4169 alloy fine grain bar manufacture method |
| CN109248980A (en) * | 2018-11-07 | 2019-01-22 | 成都先进金属材料产业技术研究院有限公司 | The manufacturing method of GH4169 alloy bar material |
| CN113263124A (en) * | 2021-05-10 | 2021-08-17 | 大冶特殊钢有限公司 | Preparation method of full-section fine-grain GH4169 alloy radial forging bar |
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2022
- 2022-03-22 CN CN202210287292.6A patent/CN114799000A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492906A (en) * | 2011-12-29 | 2012-06-13 | 钢铁研究总院 | Forging method of high-temperature alloy fine-grained bars |
| CN105331912A (en) * | 2015-11-27 | 2016-02-17 | 西部超导材料科技股份有限公司 | GH4169 high-temperature alloy bar and manufacturing method thereof |
| CN106868436A (en) * | 2017-01-18 | 2017-06-20 | 抚顺特殊钢股份有限公司 | A kind of fast footpath forging Joint Production GH4169 alloy fine grain bar manufacture method |
| CN109248980A (en) * | 2018-11-07 | 2019-01-22 | 成都先进金属材料产业技术研究院有限公司 | The manufacturing method of GH4169 alloy bar material |
| CN113263124A (en) * | 2021-05-10 | 2021-08-17 | 大冶特殊钢有限公司 | Preparation method of full-section fine-grain GH4169 alloy radial forging bar |
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