CN106623941B - A kind of powder metallurgy superalloy element stages heating squeezes control shape method - Google Patents
A kind of powder metallurgy superalloy element stages heating squeezes control shape method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
- B22F2003/208—Warm or hot extruding
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Abstract
The present invention is that a kind of powder metallurgy superalloy element stages heating squeezes control shape method, this method is that the good mobility of dusty material is utilized, by the deformation temperature and pressure of phase change, dusty material is made to reach initial densification under lower temperature and smaller pressure, and retain powder particle with a degree of surface-active and mobility, then deformation temperature and pressure are improved, parameter is plastically deformed with reference to mold movement direction and deformation velocity etc., it flows superalloy powder and reaches certain shape, in this course, hole between powder particle completely disappears, reach full densification.At the same time, the cycle alternation squeezed using forward extrusion and the back of the body is acted on, and applies certain strained condition to powder particle, big particle changes to small grains crystal grain, and component forming is completed, prepares fully dense powder component, realizes powder component curing texture forming integration.It can obtain dense structure, the powder metallurgy superalloy forging stock that crystal grain is uniform, tiny.
Description
Technical field
The present invention is that a kind of stepwise heating for powder metallurgy superalloy component squeezes control shape method, belongs to hot-working process
Field is related to the improvement of powder metallurgy superalloy component preparation process.
Background technology
Powder metallurgy superalloy is that solidifying segregation and deformation are tired caused by order to solve casting wrought alloy high temperature alloy high-alloying
The difficult and diskware material that grows up.High-alloying powder metallurgy superalloy has high temperature resistant, high-strength tenacity and low crack propagation speed
The advantages of excellent combination properties such as rate is that manufacture high-performance, high reliability, the long-life advanced aero engine turbine disk etc. are resistance to
The preferred material of high-temperature component.But high-alloying powder metallurgy superalloy, generally to temperature and its sensitivity, process window is narrow, belongs to
In less-deformable alloy, cause to perform in technique and organizational controls during there are certain difficulties.
External powder metallurgy superalloy is mainly used to prepare the hot-end components such as the high-performance enginer turbine disk, mainly using powder
Prepared by the process of hot isostatic pressing+extruding+isothermal forging, process characteristic is complex process, and long preparation period is of high cost,
Moreover, it needs repeatedly to be machined component blank between different processes, to meet process to component blank shape
With the requirement of surface state, it is low to cause stock utilization.
Invention content
The present invention is exactly to design for above-mentioned existing domestic the deficiencies in the prior art and provide one kind for powder
The stepwise heatings of last superalloy components squeezes control shape method, the purpose is to improve the production efficiency of powder metallurgy superalloy component and
Stock utilization.
The purpose of the present invention is achieved through the following technical solutions：
This kind squeezes control shape method for the stepwise heating of powder metallurgy superalloy component, it is characterised in that：The step of this method
Suddenly it is：
Step 1: powder prepares
It is calculated according to scantling and weighs atomization superalloy powder, the weight of weighing calculates as follows：
mIt loads=mIt calculates/ 0.8 formula 1
In formula：mIt loadsFor the atomization superalloy powder weight being loaded into mold, mIt calculatesTo be calculated according to the volume of component
Obtained atomization superalloy powder weight；
Step 2: prepared by extrusion die
Extrusion die is prepared using Steel material of the fracture strength more than 2000MPa, the mold is by upper circular die 1 and lower annular
Mould 2 forms extrusion die profile, wherein, lower circular die 2 is fixed on the lower table of press, and upper circular die 1 is mounted in lower annular
It on mould 2, and is fitted close with lower circular die 2, the internal diameter of upper circular die 1 is bigger than the internal diameter of lower circular die 2, and upper circular die 1 is under
Circular die 2 can be split in an axial direction；
There is upper press ring 3 in the inner cavity of upper circular die 1, matching between upper press ring 3 and upper circular die 1 is combined into excessive cooperation,
Seaming chuck 4 is installed, matching between seaming chuck 4 and upper press ring 3 is combined into excessive cooperation, in lower circular die 2 in the centre bore of upper press ring 3
Centre bore in push-down head 5 is installed, between push-down head 5 and lower circular die 2 with being combined into excessive cooperation, so as to fulfill upper press ring 3,
Seaming chuck 4 and push-down head 5 vertically can freely move up and down and the center line of three and upper circular die 1 and lower circular die
2 center line is coaxial；
Step 3: hydraulic system and heating system are in place
Extrusion die inner wall with alcohol and acetone is cleaned out, is placed in vacuum chamber, three sets of liquid of setting in vacuum chamber
Pressure system and heating system, three sets of hydraulic systems dock upper press ring 3, seaming chuck 4 and push-down head 5 respectively, in atomization high temperature alloy
Before powder loads, the upper end of push-down head 5 is concordant with the upper end of lower circular die 2, and upper press ring 3 is concordant with the lower end of seaming chuck 4, and
1 top of circular die is higher by, heating system is located at the surrounding of extrusion die；
Step 4: powder loads
Preprepared powder metallurgy superalloy atomized powder is passed through under upper press ring 3 and seaming chuck 4 in vacuum chamber
Gap between end and upper circular die 1 is poured into mold；
Step 5: powder and mold preheating
Mold and powder are heated to 500-700 DEG C, kept the temperature, soaking time calculates as follows：
TSoaking time=(LUpper circular die intracavity diameter+LUpper circular die wall thickness× 2) × 1.7min/mm formula 2
Step 6: powder curing
After treating soaking time, push-down head 5 remains stationary as, and upper press ring 3 and seaming chuck 4 move downward simultaneously, and speed is protected
It holds between 17mm/s~20mm/s, until pressure reaches 300-700MPa, at this point, 4 stop motion of upper press ring 3 and seaming chuck；
It then proceedes to be warming up to 1050-1150 DEG C, be kept the temperature, soaking time is calculated according to formula 2；
Step 7: the component forming after powder curing is using one of following four mode：
The first：After waiting until soaking time again, push-down head 5 still remains stationary as, upper press ring 3 and seaming chuck 4 after
Continuous to move downward simultaneously, speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, seaming chuck 4
With 3 stop motion of upper press ring, cylindrical powder high temperature alloy ingot can be obtained at this time；
Second：After waiting until soaking time again, push-down head 5 still remains stationary as, seaming chuck 4 and upper press ring 3 after
Continuous to move downward simultaneously, speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later, on
Pressure head 4 continues to move downward, while upper press ring 3 starts to move upwards at the same speed, and the lower face of seaming chuck 4 does not contact push-down head 5
During upper surface, 3 stop motion of seaming chuck 4 and upper press ring, you can obtain cupuliform powder metallurgy superalloy ingot；
The third：After waiting until soaking time again, push-down head 5 still remains stationary as, seaming chuck 4 and upper press ring 3 after
Continuous to move downward simultaneously, speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later, on
Pressure head 4 continues to move downward, while upper press ring 3 starts to move upwards at the same speed, treats the lower face contact push-down head 5 of seaming chuck 4
During upper surface, 3 stop motion of seaming chuck 4 and upper press ring, you can obtain tubular powder metallurgy superalloy ingot；
4th kind：After waiting until soaking time again, push-down head 5 still remains stationary as, seaming chuck 4 and upper press ring 3 after
Continuous to move downward simultaneously, speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later, under
Pressure head 5 starts to move downward at the same speed, treats the upper surface of the inner cavity of the lower circular die 2 of lower face contact of seaming chuck 4 and upper press ring 3
When, you can obtain stick powder metallurgy superalloy ingot；
Step 8: the post processing of powder metallurgy superalloy ingot
The position of upper press ring 3 and seaming chuck 4 is adjusted to the state before atomization superalloy powder loads, by upper ring
Shape mould 1 and lower circular die 2 are opened in an axial direction, take out powder metallurgy superalloy ingot, blast are carried out after being cooled to room temperature, and using machinery
The method removal surface smut of processing is to get to powder metallurgy superalloy component.
Technical solution of the present invention has the special feature that is with advantageous effect：
Present invention is generally directed to prepare powder metallurgy superalloy component using hot isostatic pressing+extruding+isothermal forging process to exist
Forging long preparation period, the manufacture state of the art of high cost, the method that extruding control shape is heated with powder stage are original to substitute
The mode of Powder hot isostatic pressure+extruding+isothermal forging, solves long preparation period, and manufacture is of high cost low with stock utilization
Problem.
The present invention is a kind of plastic forming technology research being directed in powder metallurgy high-temperature alloy component, and basic principle is
The good mobility of dusty material is utilized, by the deformation temperature and pressure of phase change, makes dusty material in lower temperature
Reach initial densification under smaller pressure, and retain powder particle with a degree of surface-active and mobility, connect down
Come, improve deformation temperature and pressure, be plastically deformed parameter with reference to mold movement direction and deformation velocity etc., make superalloy powder
It flows and reaches certain shape (cylindrical, cupuliform, stick and tubular etc.), in this course, the hole between powder particle
Gap completely disappears, and reaches full densification.At the same time, the cycle alternation squeezed using forward extrusion and the back of the body is acted on, to powder particle
Apply certain strained condition, big particle changes to small grains crystal grain, and completes component forming, so as to prepare full cause
Close powder component realizes that powder component curing-tissue-is forming integrated.Compared to hot isostatic pressing (generally 10%), deformation
Amount is increased substantially to 50~70%, promotes recrystallization, the primary granule boundary of powder is crushed, so as to prepare group
Knit powder metallurgy superalloy component fine and close and with tiny recrystal grain.
Technical solution of the present invention is the same as compared with the technology of preparing of domestic and international powder metallurgy superalloy annular construction member, advantage is main
It is embodied in：
(1) using the good mobility of powder, during powder forming, the shape of powder component is changing always, realizes
The integration of component curing-tissue-forming, reduces blank allowance, improves forging stock utilization；
(2) block forming of the dusty material from powder to the end, whole process is not to be realized at same temperature,
Deformation temperature is phase change, so as to meet powder particle from interface cohesion to Recrystallization nucleation and grow up whole process for
The different demands of Plastic Forming condition；
(3) powder particle shapes under certain Plastic Deformation Conditions, since the cycle alternation of forward extrusion and back of the body extruding is made
With being conveniently adjusted the stress and strain states of component different zones；
(4) technological process is simplified, shortens the lead time, improves stock utilization, reduces component manufacture cost.
Description of the drawings
Fig. 1 is the structure diagram of extrusion die in technical solution of the present invention
Fig. 2 is that the high temperature of technical solution of the present invention embodiment 1 adds up to the microstructure morphology of component
Fig. 3 is that the high temperature of technical solution of the present invention embodiment 2 adds up to the microstructure morphology of component
Specific embodiment
Technical solution of the present invention is further described below with reference to embodiment：
Embodiment 1
This kind squeezes control shape method for the stepwise heating of powder metallurgy superalloy component, it is characterised in that：The step of this method
Suddenly it is：
Step 1: powder prepares
It is calculated according to scantling and weighs atomization superalloy powder 7kg, the weight of weighing calculates as follows：
mIt loads=mIt calculates/ 0.8 formula 1
In formula：mIt loadsFor the atomization superalloy powder weight being loaded into mold, mIt calculatesTo be calculated according to the volume of component
Obtained atomization superalloy powder weight；
Step 2: prepared by extrusion die
Extrusion die is prepared using Steel material of the fracture strength more than 2000MPa, the mold is by upper circular die 1 and lower annular
Mould 2 forms extrusion die profile, wherein, lower circular die 2 is fixed on the lower table of press, and upper circular die 1 is mounted in lower annular
It on mould 2, and is fitted close with lower circular die 2, the internal diameter of upper circular die 1 is bigger than the internal diameter of lower circular die 2, and upper circular die 1 is under
Circular die 2 can be split in an axial direction；
There is upper press ring 3 in the inner cavity of upper circular die 1, matching between upper press ring 3 and upper circular die 1 is combined into excessive cooperation,
Seaming chuck 4 is installed, matching between seaming chuck 4 and upper press ring 3 is combined into excessive cooperation, in lower circular die 2 in the centre bore of upper press ring 3
Centre bore in push-down head 5 is installed, between push-down head 5 and lower circular die 2 with being combined into excessive cooperation, so as to fulfill upper press ring 3,
Seaming chuck 4 and push-down head 5 vertically can freely move up and down and the center line of three and upper circular die 1 and lower circular die
2 center line is coaxial；
Step 3: hydraulic system and heating system are in place
Extrusion die inner wall with alcohol and acetone is cleaned out, is placed in vacuum chamber, three sets of liquid of setting in vacuum chamber
Pressure system and heating system, three sets of hydraulic systems dock upper press ring 3, seaming chuck 4 and push-down head 5 respectively, in atomization high temperature alloy
Before powder loads, the upper end of push-down head 5 is concordant with the upper end of lower circular die 2, and upper press ring 3 is concordant with the lower end of seaming chuck 4, and
1 top of circular die is higher by, heating system is located at the surrounding of extrusion die；
Step 4: powder loads
In vacuum chamber by preprepared high temperature alloy atomized powder 6 by the lower end of upper press ring 3 and seaming chuck 4 with
Gap between upper circular die 1 is poured into mold；
Step 5: powder and mold preheating
Mold and high temperature alloy atomized powder 6 are heated to 700 DEG C, kept the temperature, soaking time calculates as follows：
TSoaking time=(LUpper circular die intracavity diameter+LUpper circular die wall thickness× 2) × 1.7min/mm formula 2
Step 6: powder curing
After treating soaking time, push-down head 5 remains stationary as, and upper press ring 3 and seaming chuck 4 move downward simultaneously, and speed is protected
It holds between 17mm/s, until pressure reaches 500MPa, at this point, 4 stop motion of upper press ring 3 and seaming chuck；
It then proceedes to be warming up to 1070 DEG C, be kept the temperature, soaking time is calculated according to formula 2；
Step 7: cylindrical powder component forming
After waiting until soaking time again, push-down head 5 still remains stationary as, upper press ring 3 and seaming chuck 4 continue simultaneously to
Lower movement, speed are maintained between 17mm/s, until pressure reaches 1400MPa, 3 stop motion of seaming chuck 4 and upper press ring, and at this time
Cylindrical powder high temperature alloy ingot can be obtained；
Step 8: the post processing of powder metallurgy superalloy ingot
The position of upper press ring 3 and seaming chuck 4 is adjusted to the state before atomization superalloy powder loads, by upper ring
Shape mould 1 and lower circular die 2 are opened in an axial direction, take out powder metallurgy superalloy ingot, blast are carried out after being cooled to room temperature, and using machinery
The method removal surface smut of processing is to get to powder metallurgy superalloy component.
Referring to shown in attached drawing 2, the microstructure of powder metallurgy superalloy component is uniform, can't see apparent primary granule side
Boundary.
Embodiment 2
This kind squeezes control shape method for the stepwise heating of powder metallurgy superalloy component, it is characterised in that：The step of this method
Suddenly it is：
Step 1: powder prepares
It is calculated according to scantling and weighs atomization superalloy powder 5kg, the weight of weighing calculates as follows：
mIt loads=mIt calculates/ 0.8 formula 1
In formula：mIt loadsFor the atomization superalloy powder weight being loaded into mold, mIt calculatesTo be calculated according to the volume of component
Obtained atomization superalloy powder weight；
Step 2: prepared by extrusion die
Extrusion die is prepared using Steel material of the fracture strength more than 2000MPa, the mold is by upper circular die 1 and lower annular
Mould 2 forms extrusion die profile, wherein, lower circular die 2 is fixed on the lower table of press, and upper circular die 1 is mounted in lower annular
It on mould 2, and is fitted close with lower circular die 2, the internal diameter of upper circular die 1 is bigger than the internal diameter of lower circular die 2, and upper circular die 1 is under
Circular die 2 can be split in an axial direction；
There is upper press ring 3 in the inner cavity of upper circular die 1, matching between upper press ring 3 and upper circular die 1 is combined into excessive cooperation,
Seaming chuck 4 is installed, matching between seaming chuck 4 and upper press ring 3 is combined into excessive cooperation, in lower circular die 2 in the centre bore of upper press ring 3
Centre bore in push-down head 5 is installed, between push-down head 5 and lower circular die 2 with being combined into excessive cooperation, so as to fulfill upper press ring 3,
Seaming chuck 4 and push-down head 5 vertically can freely move up and down and the center line of three and upper circular die 1 and lower circular die
2 center line is coaxial；
Step 3: hydraulic system and heating system are in place
Extrusion die inner wall with alcohol and acetone is cleaned out, is placed in vacuum chamber, three sets of liquid of setting in vacuum chamber
Pressure system and heating system, three sets of hydraulic systems dock upper press ring 3, seaming chuck 4 and push-down head 5 respectively, in atomization high temperature alloy
Before powder loads, the upper end of push-down head 5 is concordant with the upper end of lower circular die 2, and upper press ring 3 is concordant with the lower end of seaming chuck 4, and
1 top of circular die is higher by, heating system is located at the surrounding of extrusion die；
Step 4: powder loads
In vacuum chamber by preprepared high temperature alloy atomized powder 6 by the lower end of upper press ring 3 and seaming chuck 4 with
Gap between upper circular die 1 is poured into mold；
Step 5: powder and mold preheating
Mold and high temperature alloy atomized powder 6 are heated to 500-700 DEG C, kept the temperature, soaking time is as follows
It calculates：
TSoaking time=(LUpper circular die intracavity diameter+LUpper circular die wall thickness× 2) × 1.7min/mm formula 2
Step 6: powder curing
After treating soaking time, push-down head 5 remains stationary as, and upper press ring 3 and seaming chuck 4 move downward simultaneously, and speed is protected
It holds between 20mm/s, until pressure reaches 700MPa, at this point, 4 stop motion of upper press ring 3 and seaming chuck；
It then proceedes to be warming up to 1100 DEG C, be kept the temperature, soaking time is calculated according to formula 2；
Step 7: cupuliform powder component shapes
After waiting until soaking time again, push-down head 5 still remains stationary as, seaming chuck 4 and upper press ring 3 continue simultaneously to
Lower movement, speed are maintained between 20mm/s, until pressure reaches 1100MPa, later, seaming chuck 4 continues to move downward, simultaneously
Upper press ring 3 starts to move upwards at the same speed, when the lower face of seaming chuck 4 does not contact the upper surface of push-down head 5, seaming chuck 4 and upper pressure
3 stop motion of ring, you can obtain cupuliform powder metallurgy superalloy ingot；
Step 8: the post processing of powder metallurgy superalloy ingot
The position of upper press ring 3 and seaming chuck 4 is adjusted to the state before atomization superalloy powder loads, by upper ring
Shape mould 1 and lower circular die 2 are opened in an axial direction, take out powder metallurgy superalloy ingot, blast are carried out after being cooled to room temperature, and using machinery
The method removal surface smut of processing is to get to powder metallurgy superalloy component.
Referring to shown in attached drawing 3, the microstructure of powder metallurgy superalloy component is uniform, can't see apparent primary granule side
Boundary.
Claims (1)
1. a kind of powder metallurgy superalloy element stages heating squeezes control shape method, it is characterised in that：The step of this method is：
Step 1: powder prepares
It is calculated according to scantling and weighs atomization superalloy powder, the weight of weighing calculates as follows：
mIt loads=mIt calculates/ 0.8 formula 1
In formula：mIt loadsFor the atomization superalloy powder weight being loaded into mold, mIt calculatesIt is calculated for the volume according to component
Atomization superalloy powder weight；
Step 2: prepared by extrusion die
Extrusion die is prepared using Steel material of the fracture strength more than 2000MPa, the mold is by upper circular die (1) and lower circular die
(2) extrusion die profile is formed, wherein, lower circular die (2) is fixed on the lower table of press, and upper circular die (1) is mounted in down
In circular die (2), and it is fitted close with lower circular die (2), the internal diameter of upper circular die (1) is bigger than the internal diameter of lower circular die (2), on
Circular die (1) and lower circular die (2) can be split in an axial direction；
There is upper press ring (3) in the inner cavity of upper circular die (1), excessively matching with being combined between upper press ring (3) and upper circular die (1)
It closes, installation seaming chuck (4) in the centre bore of upper press ring (3), matching between seaming chuck (4) and upper press ring (3) is combined into excessive cooperation,
Push-down head (5) is installed in the centre bore of lower circular die (2), matching between push-down head (5) and lower circular die (2) is combined into and excessively matches
It closes, vertically can freely be moved up and down and in three so as to fulfill upper press ring (3), seaming chuck (4) and push-down head (5)
Heart line and the center line of upper circular die (1) and lower circular die (2) are coaxial；
Step 3: hydraulic system and heating system are in place
Extrusion die inner wall with alcohol and acetone is cleaned out, is placed in vacuum chamber, three sets of hydraulic pressure systems of setting in vacuum chamber
System and heating system, three sets of hydraulic systems dock upper press ring (3), seaming chuck (4) and push-down head (5) respectively, are closed in atomization high temperature
Before bronze end loads, the upper end of push-down head (5) is concordant with the upper end of lower circular die (2), upper press ring (3) and seaming chuck (4)
Lower end is concordant, and is higher by circular die (1) top, and heating system is located at the surrounding of extrusion die；
Step 4: powder loads
Preprepared powder metallurgy superalloy atomized powder is passed through under upper press ring (3) and seaming chuck (4) in vacuum chamber
Gap between end and upper circular die (1) is poured into mold；
Step 5: powder and mold preheating
Mold and powder are heated to 500-700 DEG C, kept the temperature, soaking time calculates as follows：
TSoaking time=(LUpper circular die intracavity diameter+LUpper circular die wall thickness× 2) × 1.7min/mm formula 2
Step 6: powder curing
After treating soaking time, push-down head (5) remains stationary as, and upper press ring (3) and seaming chuck (4) move downward simultaneously, speed
It is maintained between 17mm/s~20mm/s, until pressure reaches 300-700MPa, at this point, upper press ring (3) and seaming chuck (4) stop
Movement；
It then proceedes to be warming up to 1050-1150 DEG C, be kept the temperature, soaking time is calculated according to formula 2；
Step 7: the component forming after powder curing is using one of following four mode：
The first：After waiting until soaking time again, push-down head (5) still remains stationary as, upper press ring (3) and seaming chuck (4)
Continuation moves downward simultaneously, and speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, seaming chuck
(4) and upper press ring (3) stop motion, cylindrical powder high temperature alloy ingot can be obtained at this time；
Second：After waiting until soaking time again, push-down head (5) still remains stationary as, seaming chuck (4) and upper press ring (3)
Continuation moves downward simultaneously, and speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later,
Seaming chuck (4) continues to move downward, while upper press ring (3) beginning moves upwards at the same speed, and the lower face of seaming chuck (4) does not contact down
During the upper surface of pressure head (5), seaming chuck (4) and upper press ring (3) stop motion, you can obtain cupuliform powder metallurgy superalloy ingot；
The third：After waiting until soaking time again, push-down head (5) still remains stationary as, seaming chuck (4) and upper press ring (3)
Continuation moves downward simultaneously, and speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later,
Seaming chuck (4) continues to move downward, while upper press ring (3) beginning moves upwards at the same speed, under the lower face contact for treating seaming chuck (4)
During the upper surface of pressure head (5), seaming chuck (4) and upper press ring (3) stop motion, you can obtain tubular powder metallurgy superalloy ingot；
4th kind：After waiting until soaking time again, push-down head (5) still remains stationary as, seaming chuck (4) and upper press ring (3)
Continuation moves downward simultaneously, and speed is maintained between 17mm/s~20mm/s, until pressure reaches 1000-1400MPa, later,
Push-down head (5) beginning moves downward at the same speed, treats the inner cavity of the lower circular die (2) of lower face contact of seaming chuck (4) and upper press ring (3)
Upper surface when, you can obtain stick powder metallurgy superalloy ingot；
Step 8: the post processing of powder metallurgy superalloy ingot
The position of upper press ring (3) and seaming chuck (4) is adjusted to the state before atomization superalloy powder loads, by upper ring
Shape mould (1) and lower circular die (2) are opened in an axial direction, take out powder metallurgy superalloy ingot, blast is carried out, and use after being cooled to room temperature
The method removal surface smut of mechanical processing is to get to powder metallurgy superalloy component.
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