CN110468361A - A kind of preparation method of wrought superalloy fine grain bar - Google Patents
A kind of preparation method of wrought superalloy fine grain bar Download PDFInfo
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- CN110468361A CN110468361A CN201910665041.5A CN201910665041A CN110468361A CN 110468361 A CN110468361 A CN 110468361A CN 201910665041 A CN201910665041 A CN 201910665041A CN 110468361 A CN110468361 A CN 110468361A
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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
- B21J5/002—Hybrid process, e.g. forging following casting
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- 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
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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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 belongs to high temperature alloy advanced machining technology fields, it is related to a kind of preparation method of wrought superalloy fine grain bar, includes the following steps: that feed proportioning, vacuum induction furnace smelting, vacuum consumable remelting, High temperature diffusion homogenizing annealing, jumping-up base, hot jacket, the sandblasting of jacket base, brushing glass lubricant, extruding prepare bar, jacket removal.Jumping-up and extrusion blooming technique are carried out organic assembling by the present invention, innovation prepares large scale rod bar using small dimension ingot shape, solve the problems, such as that difficulty is big, forming not easy to be processed for the deformation of such material technology, bar grain structure is tiny, uniform, the complex alloys wrought superalloy bar product quality of production is high, and microstructure control is ideal, and mechanical property is improved and improves, material qualification rate is high, remarkable in economical benefits.
Description
Technical field
The invention belongs to high temperature alloy advanced machining technology field more particularly to a kind of complex alloys wrought superalloys
The preparation method of uniform fine grain bar.
Background technique
High temperature alloy is widely used in industrial circles such as Aeronautics and Astronautics, ship, nuclear power, petroleum, chemical industry.High temperature alloy
It generally can be divided into wrought superalloy and cast superalloy two major classes by forming technology.Wrought superalloy is manufacture aviation hair
A kind of important materials of the motivation turbine disk.
The preparation of the uniform fine grain bar of Turbine Disk Superalloys or uniform fine grain base, is advanced engine turbine disk
The premise and basis developed and produced.The uniformity and fine-characterization of wrought superalloy bar grain structure can guarantee diskware
The uniformity of tissue and good service performance, so that the reliability of diskware and safety be made to be improved.
It smelts and heat processing and forming is two most important processes of Turbine Disk Superalloys bar production.In order to
The bar of turbine disk diameter of phi 200mm~Φ 280mm or so is obtained, traditional melting is prepared in ingot casting, ingot shape selected to use
Diameter is usually the big ingot shape of Φ 508mm or so, and still, larger specification ingot shape frequently can lead to the segregation of alloy cast ingot solidified structure
Phenomenon is serious, is unfavorable for bar and obtains uniform formation.
Hot-working cogging is the important ring in wrought superalloy rod material production technology, it is to cast wrought superalloy
Ingot becomes a kind of thermal deformation technique method of bar.Hammer cogging is a kind of mode of hot-working cogging.Hammer cogging is suitable for
The low wrought superalloy of alloying level, the alloy of this kind of low alloying usually have Deformation Resistance low, and thermoplasticity is high
Feature, thus it is easy forging and molding.However, with the development of advanced aero engine, it is desirable that the thrust ratio of aero-engine is not
It is disconnected to improve, this require the wrought superalloy of the production turbine disk must add a large amount of alloy element could obtain it is good comprehensive
Performance is closed, to meet the high use demand pushed away than engine turbine disk, the addition of a large amount of alloy elements causes the turbine disk to be used
The alloying level of wrought superalloy becomes complicated, since the hot-working deformation of this kind of complex alloys wrought superalloy is anti-
Power is high, thermoplasticity is low, and ingot casting is difficult to deform, and solely hammer cogging causes bar cracking degree height, bar forming difficulty big, forging
Nonuniform organization is made, there are coarse-grain, mixed crystal, the differential big phenomenons of grain size.
Hot extrusion is to prepare another heat processing and forming mode of metal material.Compared with hammer cogging technique, two kinds of works
The stress state that material is born under skill is completely different, since hot extrusion technique has the stress state of three-dimensional compression, utmostly
Ground improves the deformability of material, improves process plastic and permissible deformation extent, is capable of forming the dynamic of fine uniform
Recrystal grain, hot extrusion technique are conducive to the forming of some inductile alloys and difficult-to-deformation material.
Preparation for low alloying wrought superalloy bar, studies in China is more, and technology is more mature.But it is right
In the turbine disk preparation of the uniform fine grain bar of complex alloys wrought superalloy, the country lacks research, and technical difficulty is larger,
It is a urgent problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of wrought superalloy fine grain bar, to solve current method
In larger specification ingot shape frequently can lead to that alloy cast ingot solidified structure segregation phenomena is serious, be unfavorable for bar and obtain uniform formation
Technical problem.
To solve this technical problem, the technical scheme is that
A kind of preparation method of wrought superalloy fine grain bar, comprising the following steps:
Step 1: feed proportioning: by wrought superalloy chemical component to Cr material, Co, Mo, W, Al, Ti, Nb, C,
Ni carries out weighing, ingredient；
Step 2: vacuum induction furnace smelting: the prepared raw material of constant weight is packed into vaccum sensitive stove and carries out melting,
Prepare electrode bar；
Step 3: vacuum consumable remelting: the electrode bar made from vacuum induction furnace smelting is fitted into consumable electrode vacuum furnace
Consumable remelting is carried out, medium format consumable ingot is prepared；The consumable ingot specification is Φ 320mm~Φ 360mm；
Step 4: High temperature diffusion homogenizing annealing: carrying out High temperature diffusion homogenizing annealing to the consumable ingot, obtain uniform
Annealing ingot；
Step 5: jumping-up base: homogenizing annealing ingot both ends being machined out and cause both ends of the surface smooth, parallel, and rounding
Angle；Later, the annealed ingot is put into high-temperature electric resistance furnace and is heated, annealed ingot is taken out out of high-temperature electric resistance furnace, be put into heading die, In
Intermediate base is upset as on hydraulic press, intermediate base is cooled to room temperature；
Step 6: hot jacket: intermediate base is put into acquisition jacket base in warmed-up stainless steel sleeve；
Step 7: jacket base sandblasting: jacket base being put into sand-blasting machine and carries out blasting treatment；Form jacket blank outer surface
Certain roughness；
Step 8: brushing glass lubricant: uniform brushing glass lubricant on the jacket blank outer surface after sandblasting；Accomplish
Uniformly, securely, it is fine and close；
Step 9: extruding prepares bar: the jacket base of brushing glass lubricant being put into high-temperature electric resistance furnace and is heated；From high temperature
Jacket base is taken out in electric furnace, is put into the extrusion cylinder of extruder, is squeezed into the rod-like material of diameter of phi 200mm~Φ 280mm, is squeezed
Rod-like material afterwards is cooled to room temperature；
Step 10: jacket removes: removing the stainless ladle outside the rod-like material of extruding using machining or wire cutting mode
Set obtains the uniform fine grain bar of wrought superalloy.
Electrode bar diameter described in step 2 is Φ 270mm~Φ 290mm.
Consumable ingot described in step 4 is annealed within the scope of 1170 DEG C~1250 DEG C.
The specific heating process in high-temperature electric resistance furnace of annealed ingot described in step 5 is as follows: heating anneal ingot charging temperature≤
300 DEG C, 800 DEG C~850 DEG C are heated to, keeps the temperature 30min~60min, is continuously heating to 1100 DEG C~1130 DEG C, keeps the temperature 240min
~300min.
The specific steps of the step 6 are as follows: internal diameter stainless steel sleeve 0.5mm-1mm smaller than intermediate base outer diameter is put into
It is heated to 500 DEG C or more in high-temperature electric resistance furnace, keeps the temperature 45min~60min, stainless steel sleeve is taken out from high-temperature electric resistance furnace, rapidly
Intermediate base is inserted in stainless steel sleeve, obtains jacket base after air-cooled；The stainless steel sleeve that internal diameter is less than intermediate base outer diameter is added
Heat is to be higher than deformation high temperature using the linear expansion coefficient of stainless steel at high temperature to close to 500 DEG C or more heat preservation 45min~60min
Both this difference of the linear expansion coefficient of golden intermediate base, so that intermediate base is inserted in stainless steel sleeve at high temperature, and realize
The purpose combined closely.
The heating process of jacket base in the step 9 specifically: jacket base charging temperature≤300 DEG C are heated to 700 DEG C
~750 DEG C, 60min~120min is kept the temperature, is continuously heating to 900 DEG C~950 DEG C, 60min~120min is kept the temperature, is continuously heating to
1050 DEG C~1100 DEG C, keep the temperature 240min~360min；
Extrusion process parameters in the step 9 are as follows: extrusion ratio is 3:1~8:1, and extrusion speed is 65mm/s~95mm/s.
Preferably, further include the steps that preheating heading die in step 5；The preheating temperature is 200 DEG C~300
℃。
Preferably, the radius of corner of rounded corner both ends of the surface described in step 5 R10mm~R20mm.
Intermediate base specification described in step 5 is consistent with heading die, it is preferable that diameter of phi 400mm~Φ 500mm.
Preferably, intermediate base described in step 5 is cooling by covering and heat insulating cotton；Rod-like material after extruding is logical in step 9
It is cooling to cross covering and heat insulating cotton.
The beneficial effects of the present invention are:
(1) technical solution of the present invention realizes complex alloys using jumping-up+extruding hot-working cogging group technology
Prepared by the heat processing and forming of wrought superalloy bar, solve deformation big, the not easy to be processed forming of difficulty of such material technology
Problem greatly improves the lumber recovery of bar；
(2) technique that the jumping-up and extruding that technical solution of the present invention uses combine can obtain bigger hot-working and become
Shape amount can effectively be crushed ingot casting arborescent structure, so that bar grain structure is highly uniform tiny, grain size is up to ASTM 10
Grade~14 grades, provides one with the control of complex alloys wrought superalloy bar microstructure homogenization, grain refining for the turbine disk
The effective and feasible method of item；
(3) technical solution of the present invention is directed to the characteristics of complex alloys wrought superalloy, and innovation uses small dimension ingot shape
The preparation of large scale rod bar is realized, ingot casting macrosegregation tissue caused by smelting using big ingot shape can be reduced or eliminated whereby
Phenomenon is bar hot-working structural homogenity so as to improve the uniformity of complex alloys wrought superalloy as-cast structure
Acquisition create precondition.
(4) the complex alloys wrought superalloy bar of process of the invention preparation, there is good room temperature to draw
Stretch the comprehensive performances such as performance, high temperature tensile properties.
(5) present invention provides reliable preparation method, produces height by technological parameter strict control, technique cooperation
The complex alloys wrought superalloy bar of quality, improves the service life of material, reduces production cost, economic benefit
Significantly.
Detailed description of the invention
It, below will be to be used to being needed in example of the invention in order to illustrate more clearly of the technical solution that the present invention is implemented
Attached drawing makees simple explain.It is clear that drawings described below is only some embodiments of the present invention, for this field
Technical staff for, without creative efforts, be also possible to obtain other drawings based on these drawings.
Fig. 1 is the wrought superalloy bar that is prepared using the method for the present invention typically uniform fine grained texture；
Fig. 2 be using the bar for preparing under the method for the present invention and tradition two kinds of processes of forging, at different temperatures into
Typical tensile strength (UTS) and yield strength (YS) comparison that row tension test obtains；
Wherein, Fig. 1 medium scale is 100 μm.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiments of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, the ordinary skill people of this field
Without making creative work, every other embodiment obtained shall fall within the protection scope of the present invention member.
The feature of the various aspects of the embodiment of the present invention is described more fully below.In the following detailed description, it proposes
Many concrete details, so as to complete understanding of the present invention.But for those of ordinary skill in the art, very bright
Aobvious, the present invention can also be implemented in the case where not needing these details.Below to the description of embodiment
Just for the sake of being better understood by showing example of the invention to the present invention.The present invention is not limited to presented below any
Specific setting and method, but cover all product structures covered without departing from the spirit of the invention, method
Any improvement, replacement etc..
In each attached drawing and following description, well known structure and technology is not shown, is caused to avoid to the present invention
It is unnecessary fuzzy.
Embodiment 1
A kind of preparation method of wrought superalloy fine grain bar, the chemical component of the wrought superalloy material are pressed
Weight percent meter includes: Cr:10.12%；Co:15.78%；Mo:4.05%；W:3.42%；Al:3.65%；Ti:
2.96%；Nb:3.07%；C:0.045%；Surplus is Ni and inevitable impurity.By complex alloys wrought superalloy
Chemical component to Cr material, Co, Mo, W, Al, Ti, Nb, C, Ni carry out weighing, ingredient；By the prepared original of constant weight
Material is packed into vaccum sensitive stove and carries out melting, prepares Φ 270mm electrode bar；Complex alloysization made from vacuum induction furnace smelting are become
Shape high temperature alloy electrode bar is fitted into progress consumable remelting in consumable electrode vacuum furnace, prepares Φ 320mm consumable ingot；Complex alloysization are become
Shape high temperature alloy Φ 320mm consumable ingot obtains homogenizing annealing ingot in 1170 DEG C of progress High temperature diffusion homogenizing annealings；Uniformly
Annealing ingot both ends are machined out, and keep both ends of the surface smooth, parallel, and rounded corner, both ends of the surface radius of corner R10mm；Later,
Annealed ingot after finishing, which is put into high-temperature electric resistance furnace, to be heated, annealed ingot charging temperature≤300 DEG C, is heated to 800 DEG C, keeps the temperature 30min,
1100 DEG C are continuously heating to, 240min is kept the temperature；Heading die is preheated to 300 DEG C in resistance furnace；It takes out and moves back out of high-temperature electric resistance furnace
Fiery ingot is put into warmed-up heading die, is upset as diameter of phi 400mm's on hydraulic press of the rated pressure not less than 5000T
Intermediate base, intermediate base covering and heat insulating cotton are cooled to room temperature；The austenite stainless steel bushing that wall thickness is 10mm is put into high-temperature electric resistance furnace
In be heated to 500 DEG C, keep the temperature 45min, austenite stainless steel bushing taken out from high-temperature electric resistance furnace, intermediate base is inserted in Ovshinsky rapidly
In body stainless steel sleeve, jacket base is obtained after air-cooled；Jacket base is put into sand-blasting machine and carries out blasting treatment；Make jacket base appearance
Face forms certain roughness；The glass lubricant that brushing fusion temperature is 1100 DEG C on jacket blank outer surface after sandblasting,
Glass lubricant brushing 3 times, accomplish uniform, secured, fine and close；The jacket base of brushing glass lubricant is put into high-temperature electric resistance furnace and is added
Heat, jacket base charging temperature≤300 DEG C are heated to 700 DEG C, keep the temperature 60min, are continuously heating to 900 DEG C, keep the temperature 60min, continue
1050 DEG C are warming up to, 240min is kept the temperature；Jacket base is taken out out of high-temperature electric resistance furnace, is put into the extruding that rated pressure is not less than 6000T
In the extrusion cylinder of machine, using extrusion ratio 4.0:1, and with the extrusion speed of 80mm/s, it is squeezed into the rod-like material of diameter of phi 200mm,
Rod-like material covering and heat insulating cotton after extruding is cooled to room temperature.The stainless steel outside rod-like material squeezed using machining mode removal
Jacket obtains the uniform fine grain bar of complex alloys wrought superalloy.
Embodiment 2
A kind of preparation method of wrought superalloy fine grain bar, the chemical component of the wrought superalloy material are pressed
Weight percent meter includes: Cr:11.35%；Co:14.52%；Mo:4.95%；W:2.82%；Al:3.81%；Ti:
2.79%；Nb:3.10%；C:0.065%；Surplus is Ni and inevitable impurity.By complex alloys wrought superalloy
Chemical component to Cr material, Co, Mo, W, Al, Ti, Nb, C, Ni carry out weighing, ingredient；By the prepared original of constant weight
Material is packed into vaccum sensitive stove and carries out melting, prepares Φ 280mm electrode bar；Complex alloysization made from vacuum induction furnace smelting are become
Shape high temperature alloy electrode bar is fitted into progress consumable remelting in consumable electrode vacuum furnace, prepares Φ 340mm consumable ingot；Complex alloysization are become
Shape high temperature alloy Φ 340mm consumable ingot obtains homogenizing annealing ingot in 1200 DEG C of progress High temperature diffusion homogenizing annealings；Uniformly
Annealing ingot both ends are machined out, and keep both ends of the surface smooth, parallel, and rounded corner, both ends of the surface radius of corner R15mm；Later,
Annealed ingot after finishing, which is put into high-temperature electric resistance furnace, to be heated, annealed ingot charging temperature≤300 DEG C, is heated to 850 DEG C, keeps the temperature 30min,
1120 DEG C are continuously heating to, 270min is kept the temperature；Heading die is preheated to 300 DEG C in resistance furnace；It takes out and moves back out of high-temperature electric resistance furnace
Fiery ingot is put into warmed-up heading die, is upset as diameter of phi 450mm's on hydraulic press of the rated pressure not less than 5000T
Intermediate base, intermediate base covering and heat insulating cotton are cooled to room temperature；The austenite stainless steel bushing that wall thickness is 15mm is put into high-temperature electric resistance furnace
In be heated to 600 DEG C, keep the temperature 50min, austenite stainless steel bushing taken out from high-temperature electric resistance furnace, intermediate base is inserted in Ovshinsky rapidly
In body stainless steel sleeve, jacket base is obtained after air-cooled；Jacket base is put into sand-blasting machine and carries out blasting treatment；Make jacket base appearance
Face forms certain roughness；The glass lubricant that brushing fusion temperature is 1100 DEG C on jacket blank outer surface after sandblasting,
Glass lubricant brushing 3 times, accomplish uniform, secured, fine and close；The jacket base of brushing glass lubricant is put into high-temperature electric resistance furnace and is added
Heat, jacket base charging temperature≤300 DEG C are heated to 750 DEG C, keep the temperature 80min, are continuously heating to 900 DEG C, keep the temperature 60min, continue
1080 DEG C are warming up to, 300min is kept the temperature；Jacket base is taken out out of high-temperature electric resistance furnace, is put into the extruding that rated pressure is not less than 6000T
In the extrusion cylinder of machine, using extrusion ratio 3.5:1, and with the extrusion speed of 65mm/s, it is squeezed into the rod-like material of diameter of phi 250mm,
Rod-like material covering and heat insulating cotton after extruding is cooled to room temperature.The stainless steel outside rod-like material squeezed using machining mode removal
Jacket obtains the uniform fine grain bar of complex alloys wrought superalloy.
Embodiment 3
A kind of preparation method of wrought superalloy fine grain bar, the chemical component of the wrought superalloy material are pressed
Weight percent meter includes: Cr:11.96%；Co:14.89%；Mo:4.13%；W:2.96%；Al:3.79%；Ti:
2.92%；Nb:3.46%；C:0.07%；Surplus is Ni and inevitable impurity.By complex alloys wrought superalloy
Chemical component carries out weighing, ingredient to Cr material, Co, Mo, W, Al, Ti, Nb, C, Ni；By the prepared raw material of constant weight
It is packed into vaccum sensitive stove and carries out melting, prepare Φ 290mm electrode bar；Complex alloysization made from vacuum induction furnace smelting are deformed
High temperature alloy electrode bar is fitted into progress consumable remelting in consumable electrode vacuum furnace, prepares Φ 360mm consumable ingot；Complex alloysization are deformed
High temperature alloy Φ 360mm consumable ingot obtains homogenizing annealing ingot in 1250 DEG C of progress High temperature diffusion homogenizing annealings；Homogenization
Annealed ingot both ends are machined out, and keep both ends of the surface smooth, parallel, and rounded corner, both ends of the surface radius of corner R15mm；Later, repairing
Annealed ingot after whole, which is put into high-temperature electric resistance furnace, to be heated, annealed ingot charging temperature≤300 DEG C, is heated to 850 DEG C, keeps the temperature 60min, after
It is continuous to be warming up to 1130 DEG C, keep the temperature 300min；Heading die is preheated to 300 DEG C in resistance furnace；Annealing is taken out out of high-temperature electric resistance furnace
Ingot is put into warmed-up heading die, is upset as in diameter of phi 500mm on hydraulic press of the rated pressure not less than 5000T
Between base, intermediate base covering and heat insulating cotton is cooled to room temperature；The austenite stainless steel bushing that wall thickness is 20mm is put into high-temperature electric resistance furnace
700 DEG C are heated to, 60min is kept the temperature, austenite stainless steel bushing is taken out from high-temperature electric resistance furnace, intermediate base is inserted in austenite rapidly
In stainless steel sleeve, jacket base is obtained after air-cooled；Jacket base is put into sand-blasting machine and carries out blasting treatment；Make jacket blank outer surface
Form certain roughness；The glass lubricant that brushing fusion temperature is 1100 DEG C on jacket blank outer surface after sandblasting, glass
Glass lubricant brushing 3 times is accomplished uniform, secured, fine and close；The jacket base of brushing glass lubricant is put into high-temperature electric resistance furnace and is added
Heat, jacket base charging temperature≤300 DEG C are heated to 750 DEG C, keep the temperature 120min, are continuously heating to 950 DEG C, keep the temperature 120min, after
It is continuous to be warming up to 1100 DEG C, keep the temperature 360min；Jacket base is taken out out of high-temperature electric resistance furnace, is put into rated pressure squeezing not less than 6000T
In the extrusion cylinder of press, using extrusion ratio 3.2:1, and with the extrusion speed of 90mm/s, it is squeezed into the rodlike of diameter of phi 280mm
Material, rod-like material covering and heat insulating cotton after extruding are cooled to room temperature.Outside the rod-like material squeezed using machining mode removal not
Become rusty steel capsule, obtains the uniform fine grain bar of complex alloys wrought superalloy.
The technique that the jumping-up and extruding that technical solution of the present invention uses combine, can obtain bigger thermal processing distortion
Amount, can effectively be crushed ingot casting arborescent structure, so that bar grain structure is highly uniform tiny, grain size is up to 10 grades of ASTM
~14 grades, as shown in Figure 1, being the control of the turbine disk complex alloys wrought superalloy bar microstructure homogenization, grain refining
Provide an effective and feasible method.
The wrought superalloy bar of process preparation of the invention, there are good room temperature tensile properties, high temperature to draw
Stretch the comprehensive performances such as performance, wherein compared to traditional single forging technology, the room temperature tensile yield strength of alloy bar material is averagely mentioned
High by about 22%, tensile strength averagely improves about 10%；Compared to traditional single forging technology, 650 DEG C of tensile yield strengths are average
About 20% is improved, tensile strength averagely improves about 8%.See Fig. 2.
Finally it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, but protection of the invention
Range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be thought easily
It is modified or replaceed to various equivalent, these, which are modified or replaceed, should all be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of wrought superalloy fine grain bar, it is characterised in that: the preparation method includes following step
It is rapid:
Step 1: feed proportioning: by wrought superalloy chemical component to Cr material, Co, Mo, W, Al, Ti, Nb, C, Ni into
Row weighing, ingredient；
Step 2: vacuum induction furnace smelting: prepared raw material being packed into vaccum sensitive stove and carries out melting, prepares electrode bar；
Step 3: vacuum consumable remelting: the electrode bar made from vacuum induction furnace smelting being fitted into consumable electrode vacuum furnace and is carried out
Consumable remelting prepares medium format consumable ingot；The consumable ingot specification is Φ 320mm~Φ 360mm；
Step 4: High temperature diffusion homogenizing annealing: carrying out High temperature diffusion homogenizing annealing to the consumable ingot, obtain homogenization and move back
Fiery ingot；
Step 5: jumping-up base: homogenizing annealing ingot both ends being machined out and cause both ends of the surface smooth, parallel, and rounded corner；It
Afterwards, the annealed ingot is put into high-temperature electric resistance furnace and is heated, annealed ingot is taken out out of high-temperature electric resistance furnace, be put into heading die, hydraulic
Intermediate base is upset as on machine, intermediate base is cooled to room temperature；
Step 6: hot jacket: intermediate base is put into acquisition jacket base in warmed-up stainless steel sleeve；
Step 7: jacket base sandblasting: jacket base being put into sand-blasting machine and carries out blasting treatment；
Step 8: brushing glass lubricant: uniform brushing glass lubricant on the jacket blank outer surface after sandblasting；
Step 9: extruding prepares bar: the jacket base of brushing glass lubricant being put into high-temperature electric resistance furnace and is heated；From high-temperature electric resistance furnace
Interior taking-up jacket base, is put into the extrusion cylinder of extruder, is squeezed into the rod-like material of diameter of phi 200mm~Φ 280mm, after extruding
Rod-like material is cooled to room temperature；
Step 10: jacket removes: removing the stainless steel capsule outside the rod-like material of extruding using machining or wire cutting mode, obtain
Obtain the uniform fine grain bar of wrought superalloy.
2. preparation method according to claim 1, it is characterised in that: electrode bar diameter described in step 2 is Φ 270mm
~Φ 290mm.
3. preparation method according to claim 1, it is characterised in that: consumable ingot described in step 4 is 1170 DEG C~1250
It anneals within the scope of DEG C.
4. preparation method according to claim 1, it is characterised in that: the radius of corner of rounded corner both ends of the surface described in step 5
R10mm~R20mm.
5. preparation method according to claim 1, it is characterised in that: annealed ingot described in step 5 has in high-temperature electric resistance furnace
Body heating process is as follows: heating anneal ingot charging temperature≤300 DEG C, is heated to 800 DEG C~850 DEG C, keeps the temperature 30min~60min,
1100 DEG C~1130 DEG C are continuously heating to, 240min~300min is kept the temperature.
6. preparation method according to claim 1, it is characterised in that: the specific steps of the step 6 are as follows: stainless steel
Sleeve, which is put into high-temperature electric resistance furnace, is heated to 500 DEG C or more, keeps the temperature 45min~60min, stainless steel sleeve is taken out from high-temperature electric resistance furnace
Cylinder, is inserted in intermediate base in stainless steel sleeve rapidly, obtains jacket base after air-cooled.
7. preparation method according to claim 1, it is characterised in that: the heating process of jacket base is specific in the step 9
Are as follows: jacket base charging temperature≤300 DEG C are heated to 700 DEG C~750 DEG C, keep the temperature 60min~120min, are continuously heating to 900 DEG C
~950 DEG C, 60min~120min is kept the temperature, is continuously heating to 1050 DEG C~1100 DEG C, keeps the temperature 240min~360min.
8. preparation method according to claim 1, it is characterised in that: extrusion process parameters in the step 9 are as follows: squeeze
Than for 3:1~8:1, extrusion speed is 65mm/s~95mm/s.
9. preparation method according to claim 1, it is characterised in that: intermediate base described in step 5 passes through covering and heat insulating cotton
It is cooling；Rod-like material after extruding is cooling by covering and heat insulating cotton in step 9.
10. preparation method according to any one of claims 1 to 9, it is characterised in that: further include by upsetting in the step 5
The step of roughcast is preheated；The preheating temperature is 200 DEG C~300 DEG C.
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