CN106563749B - Control the preparation method of GH3230 alloy rings even tissue - Google Patents
Control the preparation method of GH3230 alloy rings even tissue Download PDFInfo
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- CN106563749B CN106563749B CN201510649497.4A CN201510649497A CN106563749B CN 106563749 B CN106563749 B CN 106563749B CN 201510649497 A CN201510649497 A CN 201510649497A CN 106563749 B CN106563749 B CN 106563749B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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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
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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Abstract
The invention discloses a kind of preparation methods for controlling GH3230 alloy rings even tissue, comprising: selection bar: selecting GH3230 alloy bar material by GH3230 alloy rings to be prepared；It makes blank: after carrying out jumping-up processing to GH3230 alloy bar material, carrying out commutation pulling processing and blank is made；Production ring billet: the ring billet that jumping-up, punching and saddle support expanding treatment are constructed to upper milling train is successively carried out to manufactured blank；Ring is rolled in advance: ring billet being carried out to control the pre- of deflection on milling train and rolls processing, is made and pre- rolls ring；Ring finish to gauge: it will roll in advance after ring direct hot charging melts down heating, the finish to gauge processing of control deflection is carried out on milling train, the GH3230 alloy rings of even tissue are made.GH3230 alloy rings prepared by the present invention have the advantages that even tissue, performance are stable.
Description
Technical field
The present invention relates to alloy components preparation fields, more particularly to a kind of system for controlling GH3230 alloy rings even tissue
Preparation Method.
Background technique
GH3230 alloy is combustion chamber high temperature alloy of new generation, relative to current conventional solution strengthening high temperature alloy,
Such as GH3128 and GH3044, outstanding feature is to carry out alloy strengthening using high C and high W content, obtain it is carbide reinforced+
The complex intensifying effect of solution strengthening.Carbon element content is 2 times of other similar solution strengthening high temperature alloys, carbide in alloy
Formation element W+Mo+Cr total amount reaches 36%, therefore there are a large amount of primary carbide M in alloy6C.Under service state,
M in GH3230 alloy6The volume fraction of C carbide is about 3%, can also be very while forming certain strengthening effect to alloy
Good pinning crystal boundary, constrains growing up for crystal grain.The elevated temperature strength of alloy is apparently higher than similar nickel base superalloy such as GH3128
And GH3044, it is suitable with cobalt-base alloys GH5188；And the structure stability of alloy and anti-thermal energy power of crossing are higher than including GH5188
Existing similar high temperature alloy, if its microscopic structure is still able to maintain stabilization under 1200 DEG C of heat preservation hot conditions for 24 hours, this is
Other alloys are incomparable.In short, the M in GH3230 alloy6C carbide is that alloy is made to obtain excellent high temperature intensity, high temperature
The anti-key for crossing thermal energy power and high temperature microstructure stability.
A M in GH3230 alloy6C carbide play above-mentioned beneficial effect precondition be guarantee the carbide it is equal
Even distribution.But in the actual production process, this carbide is inclined to obvious segregation.Assemble in smelting molding steel ingot
There is (referring to shown in Fig. 1 to 4) in bar after cogging pulls out in as cast condition interdendritic with ribbon.This carbon-bearing
Compound, will be from bar heredity to ring under the conditions of ring technique processed (ring is rolled in blanking+jumping-up+punching+saddle support+) of current routine.
Once this carbide is not uniformly distributed, i.e., assembled in the product with band-like or other modes, on the one hand will be lost to alloy
Matrix strengthening effect and the effect of contraction to crystal grain；On the other hand lead to rapid crack in carbide accumulation regions.Finally
Affect anti-thermal energy power and high temperature microstructure stability etc. the performance excessively of alloy high-temp intensity, high temperature.It is shown in table 1 and Fig. 5 to 7
It uses there are Cold Roll in bar as raw material, passes through the GH3230 alloy rings performance and group of conventional ring technique preparation processed
It knits, it is seen that there are carbide to gather for partial region in alloy, and grain uniformity is poor, and the performance inconsistency of ring is larger, i.e. performance
Stability is poor.
In fact, GH3230 alloy rings can be completely secured with current ring molding equipment condition and technical level
Dimensional accuracy and deformation plasticity.But for a large amount of carbide in GH3230 alloy, how to guarantee in final ring product
Upper to obtain being uniformly distributed for uniform carbide and crystal grain, it to be in the urgent need to address that there is presently no mature technical solutions
Problem.
Summary of the invention
Based on the above existing technology problems, the present invention provides a kind of control GH3230 alloy rings even tissue
Preparation method, be avoided that being unevenly distributed for carbide and crystal grain in GH3230 alloy rings, carbide and crystal grain point be made
The uniform GH3230 alloy rings of cloth.
In order to solve the above technical problems, the present invention provides a kind of preparation side for controlling GH3230 alloy rings even tissue
Method, comprising:
It selects bar: selecting GH3230 alloy bar material by GH3230 alloy rings to be prepared；
It makes blank: after carrying out jumping-up processing to the GH3230 alloy bar material, carrying out commutation pulling processing and blank is made；
Production ring billet: jumping-up, punching and saddle support expanding treatment are successively carried out to the manufactured blank and are constructed to upper milling train
Ring billet；
Ring is rolled in advance: the ring billet being carried out to control the pre- of deflection on milling train and rolls processing, is made and pre- rolls ring；
Ring finish to gauge: by it is described it is pre- roll after ring direct hot charging melts down heating, the end of control deflection is carried out on milling train
Roll the GH3230 alloy rings that even tissue is made in processing.
The invention has the benefit that this method when making blank, by jumping-up plus commutation pulling to blank processing, disappears
In addition to influence of the Cold Roll to distribution of carbides in ring product in raw material, to be obtained in final ring product equal
Even distribution of carbides.On this basis, it is rolled in advance by ring billet plus the technique of finish to gauge is come the deflection of strict control finish to gauge process
And deformation process makes most terminal ring instead of operation of rolling deflection during tradition ring processed without the state of the art quantitatively accurately controlled
The grain uniformity of part is effectively controlled.Uniform microscopic structure is the guarantee of the property stable and reliable for performance of ring, therefore adopts
With the excellent stabilization of ring properties prepared by the present invention, and this method is simple and easy, is not necessarily to special installation.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is M in existing GH3230 alloy cast ingot6C carbide assembles pattern metallographic microscope in interdendritic；
Fig. 2 is M in existing GH3230 alloy cast ingot6C carbide assembles pattern metallographic enlarged drawing in interdendritic；
Fig. 3 is the Cold Roll and crystal grain distribution metallographic microscope in existing GH3230 alloy bar material；
Fig. 4 is the Cold Roll and crystal grain distribution metallographic enlarged drawing in existing GH3230 alloy bar material；
Fig. 5 is the Cold Roll and another metallographic enlarged drawing of crystal grain distribution in existing GH3230 alloy bar material；
Fig. 6 rolls state microscopic structure electron microscope for ring made from existing routine ring technique；
Fig. 7 is microscopic structure metallographic microscope after 1230 DEG C × 1h of ring made from existing routine ring technique is dissolved；
Fig. 8 is production blank treated blank microscopic structure metallographic microscope in method provided in an embodiment of the present invention；
Fig. 9 rolls state microscopic structure metallographic microscope for the obtained ring of method provided in an embodiment of the present invention；
Figure 10 is that microscopic structure metallographic microscope after the 1230 DEG C × 1h solid solution of ring is made in method provided in an embodiment of the present invention.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, belongs to protection scope of the present invention.
The embodiment of the present invention provides a kind of preparation method for controlling GH3230 alloy rings even tissue, and it is equal to prepare tissue
Even GH3230 alloy rings, i.e. acquisition microstructure uniformity GH3230 alloy rings, wherein microstructure uniformity is interior
Culvert refers to equally distributed M6C carbide and uniform crystallite dimension, method includes the following steps:
It selects bar: selecting GH3230 alloy bar material by GH3230 alloy rings to be prepared；
Specifically, determining materials diameter according to ring weight, it is desirable that bar height and diameter ratio 1.2~2.0 it
Between, it is ensured that there is not twin drum in stick section upsetting process, while upsetting process has biggish deflection.
It makes blank: after carrying out jumping-up processing to the GH3230 alloy bar material, carrying out commutation pulling processing and blank is made；
In this step, since GH3230 alloy bar material is by biggish unidirectional pulling deformation, lead to M in bar6C carbide
It is easy to be distributed in band, needs to carry out thermal deformation by jumping-up+commutation pulling technique in this process, to eliminate in bar
Band carbide, the equal control finally organized for ring prepares a good basis.Detailed process are as follows: heat bar
After carry out Upsetting, the cake height and diameter ratio after jumping-up are advisable between 0.5~0.7, then by cake standing come,
Carry out radial pulling, need to carry out butt end and ball process during pulling, the ratio of height to diameter control after final pulling 1.5~
Between 2.0, i.e., origin has been returned in shape, but in internal microscopic structure, the distribution of carbide is optimized.
It makes ring billet: after carrying out jumping-up processing to the manufactured blank, being punched out processing, carry out horse after punching processing
Frame expanding treatment is constructed to the ring billet of milling train；
In this step use jumping-up+punching+saddle support chambering process, prepare can the above milling train ring billet, this process and
Tradition ring technique is identical, and the purpose is to dimensionally provide preparation for ring rolling.The size of ring billet and final ring are rolled
Difference between size processed, which determines, rolls annular strain amount, in order to guarantee that ring rolling process has enough deformation amount controlling remainings.Tool
For body, ring billet need to reserve the surplus greater than 10% relative to the height of finished product ring, and wall thickness need to reserve the surplus greater than 40%.
Ring is rolled in advance: the ring billet being carried out to control the pre- of deflection on milling train and rolls processing, is made and pre- rolls ring；
Specifically, milling train in ring billet is rolled in advance, there are two the purposes rolled in advance: one is to after forging ring billet it is irregular
Shape carries out shaping, guarantees that finish to gauge process is stablized；Ring billet is accurately more rolled in advance the second is obtaining, for the deflection of finish to gauge deformation
Accurate control is prepared.Rolling the total ring cross-section varibility of process cannot be below 20% in advance, and it is regular to roll rear ring shape.
Ring finish to gauge: by it is described it is pre- roll after ring direct hot charging melts down heating, the end of control deflection is carried out on milling train
Roll the GH3230 alloy rings that even tissue is made in processing.The finish to gauge process of this step is to determine the pass of the final microscopic structure of ring
Key process, the key process parameter for influencing finish to gauge is deformation temperature and deflection, and the two is not independent, need into
Row jointly controls.
During finish to gauge, for deflection: control target be rolled using the principle of low speed heavy reduction, thus
Guarantee deflection being uniformly distributed on entire interface in the operation of rolling, is needed on specific deformation amount controlling using specific
Rolling curve controls deformation process, by journal axle bidirectional rolling, supplemented by Axial Deformation deflection 5~10%,
Based on radial rolling, wall thickness reduction 20~35%, total deflection is in 25~40% ranges.
For deformation temperature: the heating temperature before rolling determines between 1100 DEG C~1150 DEG C according to deflection is rolled in advance
Final heating temperature, generally rolls that deflection is small, then heating temperature is accordingly turned down in advance.By the mode of texturing of heavy reduction at a slow speed,
Under the premise of guaranteeing to roll, internal temperature rise is avoided, the control of practical distortion temperature is slowly being reduced with deformation process, finish to gauge temperature
Degree is not less than 900 DEG C.
In the preparation process of entire ring, to the specific control mode of heating and deformation are as follows:
It makes in blank step, jumping-up processing is carried out to the GH3230 alloy bar material are as follows: by the GH3230 alloy bar
After material is heated to 1150~1180 DEG C of heat preservations 2 hours, jumping-up is carried out using quick forging machine, the cake height that jumping-up obtains is diameter
0.5~0.7 times；
It is described to carry out commutation pulling processing are as follows: the cake diametrical direction obtained after handling along jumping-up carries out pulling processing,
It pulls out and carries out butt end and ball process in treatment process, be swaged into stick section, stick section ratio of height to diameter is between 1.5~2.0.
It makes in ring billet step, the heating temperature for carrying out jumping-up processing to the manufactured blank is 1150~1180 DEG C；
0.1~1rad/s；Feed rate are as follows: 1~4mm/s.
Method of the invention is described further in the following with reference to the drawings and specific embodiments.
It rolls ring preparation with actual and illustrates the implementation process of preparation method of the invention, the ring size for needing to roll
Are as follows: outer diameter: φ 768mm；Internal diameter: φ 655mm；It is high: 55mm.
(1) blanking:
Cutting stock weight by calculating ring needs is 80kg, is wanted according to the ratio of height to diameter of bar in 1.2~2.0mm
It asks, uses diameter 200mm bar for raw material, having a size of 200 × 287mm of φ after blanking.
(2) blank is handled:
In the bar material that uses and table 1 routinely the bar of the ring of ring technique preparation processed for same root bar, bar
Microscopic structure is shown in Fig. 2, that is, there is obvious Cold Roll.Therefore need to carry out bar jumping-up+commutation pulling processing.It will
After bar is heated to 1170 DEG C of heat preservation 2h, jumping-up, the cake size that jumping-up obtains are as follows: φ 267*160mm are carried out using quick forging machine；
Then cake standing is come, is diametrically pulled out, needed to carry out butt end and ball process during pulling, finally pull out
Size after length is about 185 × 330mm of φ.Distribution of carbides after treatment is shown in Fig. 8, it is seen that band carbide is substantially achieved
It eliminates.
(3) prepared by ring billet:
Using jumping-up+punching+saddle support chambering process, prepare can the above milling train ring billet.Wherein heating temperature is 1170
DEG C, the cake that jumping-up obtains is having a size of 420 × 65mm of φ, after punching, upper saddle support reaming, and finally obtained ring billet size
Are as follows: 475 × φ of φ, 300 × 65mm.The relatively final ring of this size, about 16% surplus in height, on ring wall thickness
There is about 35% surplus.
(4) ring is rolled in advance:
Rolling heating temperature in advance is 1170 DEG C, and the size after rolling in advance is 555 × φ of φ, 400 × 60mm, and the deflection rolled in advance is about
It is 20%.The ring structured size after rolling in advance eliminates the inhomogeneous deformation and irregular shape of saddle support reaming.
(5) ring finish to gauge:
Rear ring direct hot charging is rolled in advance to melt down, and since the deflection rolled in advance is little, should not be heated for a long time using high temperature,
Therefore heating and temperature control is at 1150 DEG C, heating time 30min.Then start to carry out ring finish to gauge.Diameter is used in the operation of rolling
Axis bidirectional rolling rolls rate are as follows: home roll revolving speed 0.2rad/s, feed rate are as follows: 2mm/s, detection rolling temperature in the operation of rolling
Degree, ring temperature is 968 DEG C when terminating rolling.The final ring that obtains is having a size of outer diameter: φ 768mm；Internal diameter: φ 655mm；It is high:
55mm, the microscopic structure after ring rolling are shown in Fig. 9.Solution heat treatment is carried out to ring after rolling, the tissue after heat treatment is shown in figure
10, and mechanical property is tested, it the results are shown in Table 2.As it can be seen that distribution of carbides in the ring forged by preparation method of the invention
Uniformly, even grain size, stable mechanical property.
The ring performance of the conventional ring technique processed of table 1
The performance of ring is made in the preparation method of the present invention of table 2
Since the matrix of high temperature alloy need to be combined and disposably be controlled by ring technique processed and heat treatment process
System, and the adjustability of ring preparation process is more preferable than heat treatment process, and the present invention is handled and is controlled by using specific blank
The ring of deflection processed is rolled in advance to be cooperated with the rings such as finish to gauge molding preparatory phase technique, effectively controls GH3230 alloy after preparation
(intension of microstructure uniformity refers to equally distributed M to the uniformity of the microscopic structure of ring product6C carbide and uniformly
Crystallite dimension).
In conclusion the present invention specifies that aiming at for GH3230 alloy rings organizational controls obtains equally distributed carbon
Compound and uniform matrix grain, and propose a kind of to select bar+production blank (jumping-up+commutation pulling)+production ring billet
(including jumping-up+punching+saddle support reaming)+ring rolls in advance+ring finish to gauge be processing step realization GH3230 alloy rings tissue
The preparation method of uniformity controlling, wherein by the processing of production blank, to there are the bars of obvious band carbide, in blanking
Thermal deformation is carried out by the way of jumping-up+deflecting pulling afterwards, eliminates band carbide in bar.Ring is carried out on this basis
Preparation；Rolled in advance by ring billet+technique of finish to gauge come the deflection and deformation process of strict control finish to gauge process, make final ring
Grain uniformity is effectively controlled.The GH3230 alloy rings prepared through the invention have even tissue, performance stable
Advantage.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (4)
1. a kind of preparation method for controlling GH3230 alloy rings even tissue characterized by comprising
It selects bar: selecting GH3230 alloy bar material by GH3230 alloy rings to be prepared；
It makes blank: after carrying out jumping-up processing to the GH3230 alloy bar material, carrying out commutation pulling processing and blank is made；The system
Make in blank step, jumping-up processing is carried out to the GH3230 alloy bar material are as follows: be heated to the GH3230 alloy bar material
After 1150~1180 DEG C keep the temperature 2 hours, jumping-up is carried out using quick forging machine, the cake height that jumping-up obtains is the 0.5~0.7 of diameter
Times；It is described to carry out commutation pulling processing are as follows: the cake diametrical direction obtained after handling along jumping-up carries out pulling processing, at pulling
Butt end and ball process are carried out during reason, are swaged into stick section, stick section ratio of height to diameter is in 1.5~2.0 ranges；
Production ring billet: the ring that jumping-up, punching and saddle support expanding treatment are constructed to upper milling train is successively carried out to the manufactured blank
Base；
Ring is rolled in advance: the ring billet being carried out to control the pre- of deflection on milling train and rolls processing, is made and pre- rolls ring；
Ring finish to gauge: it pre- is rolled described at the finish to gauge that after ring direct hot charging melts down heating, control deflection is carried out on milling train
Reason, is made the GH3230 alloy rings of even tissue；In the ring finishing step, the pre- ring direct hot charging that rolls is melted down
The heating and temperature control of heating is 1100 DEG C~1150 DEG C, and heating time is 30 minutes；Used in the operation of rolling radial rolling for
Journal axle bidirectional rolling supplemented by master is axially depressed, controls the deflection of ring are as follows: thickness thinned 20~35%, height reduction 5~
10%, total area of section change rate control is 25~40%；Ring temperature is not less than 900 DEG C when terminating rolling；Roll home roll
Speed are as follows: 0.1~1rad/s；Feed rate are as follows: 1~4mm/s.
2. the preparation method of control GH3230 alloy rings even tissue according to claim 1, which is characterized in that described
It makes in ring billet step, the heating temperature for carrying out jumping-up processing to the manufactured blank is 1150~1180 DEG C；
The relatively final ring of ring billet size obtained has 15~17% surplus in height, has 34 on ring wall thickness
~36% surplus.
3. the preparation method of control GH3230 alloy rings even tissue according to claim 1, which is characterized in that described
Ring is rolled in step in advance, and rolling heating temperature in advance is 1150~1180 DEG C, and the deflection for rolling ring in advance is 18%~22%.
4. the preparation method of control GH3230 alloy rings even tissue according to claim 1, which is characterized in that described
It selects in bar step, the GH3230 alloy bar material height and diameter ratio selected is 1.2~2.0.
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| CN109967667A (en) * | 2019-04-15 | 2019-07-05 | 无锡派克新材料科技股份有限公司 | A kind of raising GH141 alloy rings grain size homogenization method |
| CN110747418B (en) * | 2019-12-05 | 2020-11-24 | 北京钢研高纳科技股份有限公司 | GH4738 alloy, homogenizing method thereof, turbine disc forging and gas turbine |
| CN112024870A (en) * | 2020-07-30 | 2020-12-04 | 西安欧中材料科技有限公司 | SMTGH3230 spherical powder for 3D printing and preparation method and application thereof |
| CN113560364A (en) * | 2021-07-21 | 2021-10-29 | 攀钢集团江油长城特殊钢有限公司 | GH3230 alloy plate and preparation method thereof |
| CN115846689B (en) * | 2022-11-15 | 2023-08-18 | 哈尔滨工业大学（威海） | Solution treatment method for melting GH3230 alloy by laser powder bed and GH3230 alloy |
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