WO2005068167A1 - Procede et dispositif pour chauffer et comprimer un article par l'intermediaire d'un milieu de transfert thermique/de pression liquide - Google Patents

Procede et dispositif pour chauffer et comprimer un article par l'intermediaire d'un milieu de transfert thermique/de pression liquide Download PDF

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Publication number
WO2005068167A1
WO2005068167A1 PCT/JP2005/000362 JP2005000362W WO2005068167A1 WO 2005068167 A1 WO2005068167 A1 WO 2005068167A1 JP 2005000362 W JP2005000362 W JP 2005000362W WO 2005068167 A1 WO2005068167 A1 WO 2005068167A1
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WO
WIPO (PCT)
Prior art keywords
pressure
heat
medium
cavity
container
Prior art date
Application number
PCT/JP2005/000362
Other languages
English (en)
Japanese (ja)
Inventor
Tatsuhiko Katoh
Tokiya Terabe
Naoshi Makiguchi
Original Assignee
Sintokogio, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sintokogio, Ltd. filed Critical Sintokogio, Ltd.
Priority to JP2005517072A priority Critical patent/JPWO2005068167A1/ja
Publication of WO2005068167A1 publication Critical patent/WO2005068167A1/fr

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Classifications

    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • B22F3/156—Hot isostatic pressing by a pressure medium in liquid or powder form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses

Definitions

  • the present invention relates to a method and an apparatus for pressurizing and heating an article by a high-temperature isotropic compression (HIP) method, and in particular, relates to a solid metal (aluminum, magnesium, super By pressing and heating a compact of a hard alloy (or a mixture of these metals) or a ceramic powder by a high-temperature isotropic compression method through a liquid heat transfer medium, a ceramic sintered body or
  • the present invention relates to a method and an apparatus for producing a densified animal.
  • the apparatus described in Japanese Patent Application Laid-Open No. 2001-262295 discloses a method in which a molten salt as a heat transfer medium and a workpiece (light alloy material) are placed in a container, and the container is covered with a lid. It discloses that the piston is inserted into the molten salt formed in the lid and the molten salt is pressurized to hot-press the workpiece by isostatic pressing. Since this piston is thin, it is necessary to penetrate deep into the molten salt in order to sufficiently press the molten salt. Therefore, in order to prevent the piston from interfering with the work, the length of the container needs to be considerably longer than the length of the work, and there is a problem that the container becomes large.
  • the apparatus described in Japanese Patent Application Laid-Open No. 49-123409 and Japanese Patent Application Laid-Open No. 6-226428 discloses a device in which the molten salt intrudes into the die (sleeve) cavity to compress it.
  • a punch pron
  • the diameter of the punch is the same as the diameter of the cavity. Therefore, as the size of the object to be dried increases, the diameter of the cavity and the punch also needs to be increased, and as a result, a large pressurizing device is required to apply a large pressing force to the punch, and Realizing high cost due to the need for a robust supporting device to support a large pressurizing device ⁇ and! Have problems!
  • the apparatus described in Japanese Patent Application Laid-Open No. 6-226428 discloses a method in which a metal sheet is laid on the upper surface of a die and the upper surface of a pressurized medium (molten salt), and these sheets are pressed to form Pressurize the pressurized medium!
  • the sheet is plastically deformed when pressed, so it is used and discarded. Therefore, there is a problem that the seat needs to be replaced, and the cost and labor for the replacement are high.
  • the method for heating and pressurizing an article using a liquid heat / pressure transfer medium comprises the steps of providing a container having a cavity in which the article can be hermetically sealed. An article is placed in a cavity, the cavity is filled with a liquid heat and pressure transmitting medium, and the article is pressurized and heated using the liquid heat and pressure transmitting medium by pressurizing and heating the heat and pressure transmitting medium.
  • the pressure of the heat transfer medium is pressurized by an external pressure intensifier which is connected to the cavity via a pipe line, and is completely liquefied with the same component as the heat and pressure transfer medium. Made through.
  • the method for pressurizing and heating an article using a liquid heat 'pressure transmission medium is characterized in that the article is contained in a container having a cavity in which the article can be hermetically sealed. And filling the cavity with a liquid heat transfer medium, and pressurizing and heating the article using the liquid heat transfer medium that pressurizes and heats the heat transfer medium.
  • the pressure of the heat transfer medium is increased by an external pressure intensifier connected to the cavity through a separator, and the generated pressure is transferred to the heat transfer unit in the separator.
  • the medium is transmitted to the pressure transmitting medium which is housed separately from the pressure medium having the same component and the pressure transmitting medium having a different component, and the transmitted pressure is transmitted to the pressure medium, whereby the pressure is transmitted through the pressure medium.
  • the article can be pressurized without using a punch (piston), and the pressure generated by the external intensifier is quickly and reliably applied to the article in the cavity. Can be done.
  • the pressurized medium and the pressure transfer medium are separated by a telescopic separating member, and the pressure transfer medium is press-fitted into the liquid separator. As a result, the isolation member is extended, and pressure is transmitted from the pressure transmitting medium to the pressurized medium.
  • the pressure transfer medium can be a low melting point alloy, whereby the heating in the external intensifier can be kept at a relatively low temperature.
  • the pressure transmitting medium may be a liquid industrial oil at normal temperature and normal pressure. This eliminates the need to heat the external intensifier and minimizes the energy required for heating.
  • a melting point of the heat and pressure transmitting medium is equal to or lower than a heating temperature of the article. This makes it possible to perform the heat-pressure treatment without dissolving the article.
  • the melting point of the heat transmission medium may be lower than the heating temperature of the article. It can be. This allows pressurized heat treatment without dissolving the article.
  • the heat-pressure transfer medium may be a simple substance of nitrate or nitrite or It may be a mixed salt of nitrate or a mixed salt of nitrite or a mixed salt of nitrate and nitrite.
  • the article includes at least one of a solid, a metal powder, and a ceramic powder.
  • a molded article can be formed, and the molded article or the molded article can be heated and pressed to form a densified sintered article.
  • the method of the present invention can be applied to a wide range of articles, such as solid, metal, and ceramic powders.
  • the article is formed using the liquid heat and pressure transmission medium according to the first and second aspects of the present invention.
  • the heating of the heat transfer medium in the cavity is performed by a heater provided around the container or a heater provided inside the cavity, and an outer periphery of the heater is provided. It can be covered by thermal insulation. Thus, the heat and pressure transmitting medium in the cavity can be efficiently heated.
  • the apparatus for heating and pressurizing an article using a liquid heat and pressure transmission medium includes a cavity, and the heat of the article and the liquid is contained in the cavity.
  • a device for heating and pressurizing the article by heating and pressurizing the pressure transmitting medium wherein a lid for sealing or opening the cavity is opened and closed;
  • An external pressure intensifier which is connected to the other end of the conduit and is provided separately from the container and accommodates a pressurized medium therein, wherein the heat pressure in the cavity is maintained via the pressurized medium.
  • An external intensifier that pressurizes the transmission medium, and A storage device, the external pressure intensifier, and a heater provided in the conduit for heating the heat and pressure transmitting medium and the pressurizing medium are provided.
  • the apparatus for pressurizing and heating an article using a liquid heat transmission medium includes a cavity, in which the article and the liquid heat transmission medium are sealed in the cavity.
  • a container having a flow path communicating between the cavity and the outside of the container, a first pipe connected to one end of the lid and communicating with an external end of the flow path,
  • a medium storage chamber is provided inside, and the medium storage chamber is separated into a pressurized medium storage chamber and a pressure transfer medium storage chamber by a telescopic separating member, and the other end of the first conduit, the pressurized medium storage chamber, Is connected to the pressure transfer medium storage chamber at one end thereof.
  • an external pressure intensifier connected to the other end of the second conduit and connected to the other end of the second conduit and provided separately from the container and containing the pressure transmitting medium therein.
  • An external intensifier for transmitting pressure to the pressurized medium through the pressurized medium to pressurize the heat transfer medium in the cavity, the container, the liquid separator, the external intensifier, and the first conduit.
  • a heater provided in the second conduit for heating the heat and pressure transmitting medium, the pressurizing medium and the pressure transmitting medium.
  • the isolation member in the medium accommodating chamber may be made of a metal bellows having one end closed.
  • the open end side of the metal bellows can be brought into close contact with the inner wall of the medium storage chamber, and the inside of the metal bellows can be used as the pressure transmission medium storage chamber.
  • the pressurized medium and the pressure transfer medium can be separated so as not to be mixed, and a predetermined pressure can be reliably transmitted to the pressurized medium.
  • the lid of the container is formed with a conical air pocket whose bottom is a hem and whose bottom circle has a diameter equal to the diameter of the cavity.
  • a flow passage having a side wall as an outer end and an inclined surface of the air reservoir as an inner end, and an air passage having a vertex of the air reservoir as an inner end and a side wall of the lid as an outer end are respectively formed to penetrate therethrough. .
  • the apparatus includes a frame surrounding the container, and fixing means provided between a lower end of the container and an inner bottom surface of the frame.
  • the container When the heat-pressure transmitting medium in the cavity is pressurized, the container is pushed up to press the upper surface of the lid against the ceiling surface of the frame, and the heat-pressure transmitting medium force is applied to the force acting on the lid. Pile and secure the lid. Thereby, even if the article in the cavity is pressurized by the heat and pressure transmitting medium, the lid of the container can be securely fixed.
  • a heater for heating the heat / pressure transfer medium in the cavity is provided around the container or in the cavity.
  • the outer periphery of the heater is covered with a heat insulating material.
  • Examples 1 and 2 for carrying out the present invention will be described. These embodiments are described by way of example only and are not intended to limit the invention to such embodiments. In Examples 1 and 2, similar elements of the apparatus are given the same or similar numbers.
  • the present invention relates to a method and an apparatus for heating and pressurizing an article by a high-temperature isotropic compression (HIP) method, and in particular, to a method for forming a compact of a metal powder or a ceramic powder using a liquid heat transfer medium.
  • HIP high-temperature isotropic compression
  • TECHNICAL FIELD The present invention relates to a method and an apparatus for producing a sintered body by a compression method. Further, the present invention provides a method and an apparatus for producing a dense and high-quality object by minimizing or eliminating voids contained in the object by similarly treating an object obtained by manufacturing a molten metal. Concerns.
  • the article of the present invention includes a molded product or a product of metal powder or ceramic powder.
  • the metal powder includes aluminum, magnesium, cemented carbide, or a mixture of these metals.
  • the heat / pressure transmitting medium and the pressurizing medium are a single salt of nitrate such as potassium nitrate (melting point: 333 ° C.), sodium nitrate (melting point: 308 ° C.) or sodium nitrite (melting point: 271 ° C.) And the like, or a mixed salt of nitrites, a mixed salt of nitrites, and a molten salt which is a mixed salt of nitrate and nitrite.
  • the melting point of this molten salt must be lower than the temperature at which the article is heated.
  • the heater of the present invention generally generates heat when energized, for example, a heater having a structure in which a -chrome wire is covered with an insulator is not limited to this, and the same function is performed. All possible heaters are included.
  • the heat insulating material in the present invention means a material generally used in industrial machines such as a ceramic heat insulating material.
  • the external pressure intensifier according to the present invention includes a bore capable of storing a molten salt as a pressurized medium, and a plunger inserted into the molten salt stored in the bore.
  • Discharge port force established in communication with the bore It means something that has the ability.
  • the fixing means in the present invention has a mechanism for generating a pressure that can oppose the pressing force applied to the inside of the cavity at the time of pressurizing and heat-treating the article.
  • a mechanism for generating a pressure that can oppose the pressing force applied to the inside of the cavity at the time of pressurizing and heat-treating the article.
  • FIG. 1 shows a first embodiment of an apparatus for carrying out the present invention.
  • FIG. 1 shows a frame 1 of the present invention and a heat and pressure transfer medium (molten salt in this embodiment) filled with a cavity 3 of a container 2 connected to the frame 1 and housed in the frame 1.
  • FIG. 1 is a schematic cross-sectional view showing an external pressure intensifier 5 that pressurizes) via a pressurized medium (a molten salt having the same component as a heat and pressure transmitting medium in this embodiment).
  • the container 2 has a cup shape having a cavity 3, and is provided with a lid 2a for sealing or opening the cavity 3 so as to be able to come and go.
  • the container 2 is supported by having its bottom surface in contact with the upper end of a hydraulic cylinder 6 as fixing means fixed to the inner bottom surface of the frame 1. Since the lid 2a can be carried into and out of the frame 1 by a transport device (not shown), the cavity 3 of the container 2 can be sealed or opened.
  • the lid 2a is formed with a conical air reservoir 8 whose bottom is the bottom of the lid 2a and whose bottom circle has a diameter equal to the diameter of the cavity 3.
  • the apex of the air reservoir 8 is located substantially on the vertical center axis of the lid 2a.
  • the lid 2a is provided with a flow path 7 through which a molten salt as a pressurized medium flows.
  • the flow path 7 extends horizontally straight with the side wall of the lid 2a as an outer end.
  • the lid 2a is provided with an air passage 9 extending straight upward with the top of the air reservoir 8 as an inner end, and then bent at a right angle to extend straight and penetrate with the side wall of the lid 2a as an outer end. ing. Since the outer end of the air passage 9 is connected to a valve (not shown), the air accumulated in the air reservoir 8 can be discharged to the outside by opening the valve. It is being done.
  • a heater 10 is attached to the outer periphery of both the container 2 and the lid 2a, thereby heating the pressurized medium in the flow path 7 and the heat-pressure transfer medium in the cavity 3. I can do it! /
  • the heater 10 is mounted on the lid 2a so as to avoid openings which are external ends of the flow path 7 and the air path 9 respectively.
  • the heater 10 has a structure in which a -chrome wire is covered with an insulator, and since the outer periphery of the heater 10 is covered with a heat insulating material 11, heat generated by the heater 10 is transmitted to the outside. Can be prevented.
  • an external pressure intensifier 5 is provided separately from the frame 1, and the external pressure intensifier 5 has a bore 14 formed therein for filling a molten salt as a pressurized medium.
  • a discharge port 12 communicating with the bore 14 is formed in the bottom surface of the external intensifier 5, and the external intensifier 5 includes a ram 5 a that can be inserted into the bore 14.
  • the heater 10 is mounted on the outer periphery of the external intensifier 5, the outer periphery of the heater 10 is covered with the heat insulating material 11, and the discharge port 12 and the outer end of the flow path 7 are separated from each other. They are connected by a pipe 13.
  • the molten salt as a pressurized medium contained in the bore 14 can be heated to a predetermined temperature or higher, and the molten salt discharged from the bore 14 of the external pressure intensifier 5 is introduced into the flow path 7. Can be sent.
  • the outer circumference of the conduit 13 is actually provided with the heater 10 over substantially the entire length thereof, and the outer circumference of the heater 10 is covered with the heat insulating material 11. hand! Therefore, the molten salt as a pressurized medium discharged from the external pressure intensifier 5 can reach the inside of the flow channel 7 while maintaining a predetermined temperature.
  • a method of performing the heating and pressurizing treatment by using the apparatus having the above-described configuration using an aluminum material M as an example will be described.
  • a molten salt as a heat / pressure transmitting medium is injected into the cavity 3 beforehand into a liquid by being heated.
  • a molten salt in this case, a commercially available complex salt having a melting point of 145 ° C (trade name “Baslic”) manufactured by Sankei Metal Industry Co., Ltd. was used.
  • the vessel 2 is heated by the heater 10 to raise the temperature of the molten salt injected into the cavity 3, and finally reaches 520 ° C, which is the temperature required for the densification treatment of the aluminum oxide M. And maintain that temperature.
  • the aluminum material M heated to a predetermined temperature (520 ° C.) is immersed in the molten salt in the cavity 3.
  • the lid 2a is moved directly above the container 2 by a transport device (not shown), and thereafter, the hydraulic cylinder 6 as a fixing means is actuated to push up the container 2 to raise the upper surface of the lid 2a to the frame.
  • the container 2 is pressed against the ceiling surface of the container 1 to tightly fix the container 2 and the lid 2a so that the molten salt in the cavity 3 can be maintained in close contact with the container 2 even when the molten salt is pressurized. .
  • a small amount of air is trapped in the air reservoir 8, which is discharged to the outside by opening a valve (not shown) connected to the outside end of the air passage 9.
  • the inside of the flow path 7, the inside of the pipe 13, and the inside of the bore 14 of the external pressure booster 5, which are formed in the lid 2 a, are connected to the pipe 13, not shown. It is filled with molten salt as a pressurized medium by an injection device.
  • This molten salt has the same composition as the above-mentioned heat transfer medium.
  • the heater 10 attached to the lid 2a in which the flow path 7 is bored, the pipe 13 and the external intensifier 5 is heated to a temperature equal to or higher than the melting point of the molten salt (180 ° in this embodiment).
  • the molten salt in the flow path 7, the pipe 13 and the bore 14 is all completely in a liquid state.
  • the ram 5a of the external intensifier 5 is caused to enter the molten salt in the bore 4 by a pressurizing cylinder (not shown), and the molten salt is subjected to a predetermined pressure (about 1 in the present embodiment). 20MPa). Then, since the molten salt is completely in a liquid state, a predetermined pressure is applied as the heat-pressure transmission medium in the cavity 3 via the molten salt in the pipe 13 and the flow path 7. Instantaneously propagates to the molten salt, and a predetermined pressure (approximately 120 MPa) acts on the aluminum material M in the cavity 3, whereby the voids of the aluminum material M are miniaturized. Or it is made to disappear and densified.
  • a predetermined pressure approximately 120 MPa
  • the reason why the molten salt as the pressurized medium is made completely liquid is in part due to the fact that the molten salt is completely liquid. Otherwise, pressure cannot be accurately transmitted to the heat / pressure transmission medium in the cavity 3. That is, if a part of the pressurized medium is not liquid, only a part of the pressure applied by the external intensifier 5 propagates to the heat and pressure transfer medium in the cavity 3. Therefore, a higher pressure must be generated by the external pressure intensifier 5 in order to propagate the required pressure, so that a more powerful device is required. Further, there is also a problem that the pressure medium in the bore 14 becomes liquid, and a predetermined pressure cannot be generated even when the ram 5a enters.
  • the molten salt in the cavity 3 As a heat and pressure transmitting medium It is sufficient to heat to a temperature higher than the melting point of the molten salt that does not need to be heated to the same level as the salt. Therefore, at the time of pressurization processing, the force at which the molten salt having a lower temperature than the molten salt in the cavity 3 flows into the air reservoir 8 from the flow path 7 is larger than that of the cavity 3. Therefore, the temperature of the molten salt in the cavity 3 is hardly reduced, and does not affect the heat treatment of the aluminum oxide M.
  • the melting point of the pressure transfer medium can be lower than the melting points of the heat transfer medium and the pressurized medium.
  • hydraulic oil, gear oil, lubricating oil, and cutting oil with high noncombustibility can be used. This refers to the use of industrial oils that are liquid at room temperature and pressure (25 ° C, 1 atm) such as cutting oil and cleaning oil, and low melting point alloys such as bismuth, lead, and tin with melting points of 70-140 ° C.
  • the liquid separator includes therein a medium accommodating chamber for accommodating the pressurized medium and the pressure transmitting medium, respectively.
  • the pressure transfer medium accommodating chamber containing the pressure transfer medium is connected to the external pressure intensifier, and when the pressure transfer medium is pressure-fed from the external pressure intensifier into the pressure transfer medium accommodating chamber, the isolation member is released.
  • the size of this separator, The shape is not particularly limited, and is appropriately selected according to the heating and pressurizing temperatures for treating the article.
  • the telescopic isolation member means that when the pressure transfer medium is pressure-fed into the pressure transfer medium accommodating chamber by the external pressure intensifier, the pressure transfer medium transmits pressure to the pressurized medium, A function of transmitting the pressure to the heat transfer medium in the cavity 3 by the pressurized medium filled in the first conduit and the flow path; It has a function of isolating the pressurized medium and the pressure transmitting medium housed in the chambers, respectively, and preventing the passage of a liquid that makes them immiscible.
  • metal bellows and diaphragms are suitable.
  • FIG. 2 shows a second embodiment of the apparatus for carrying out the present invention.
  • FIG. 2 shows a frame 1 and a heat and pressure transfer medium (molten salt in this embodiment) filled with a cavity 3 of a container 2 connected to the frame 1 and housed in the frame 1.
  • An external pressure intensifier 5 that pressurizes via a pressure medium (a molten salt in the present embodiment), a pressure transmission medium discharged from the external pressure intensifier 5 and the pressure medium, and pressurized by the pressure transmission medium.
  • FIG. 2 is a schematic cross-sectional view showing a separator 20 that transmits pressure to a medium.
  • the heater 10 attached to the outer periphery of 2a and the heat insulating material 11 covering the outer periphery of the heater 10 have the same action as that shown in FIG. The description of these elements will not be repeated.
  • a liquid separator 20 having a medium accommodating chamber 21 therein is provided separately from the frame 1.
  • the medium accommodating chamber 21 is separated into a pressurized medium accommodating chamber 22 and a pressure transmitting medium accommodating chamber 23 by a metal bellows 17 which is extendable and contractable and has one end closed as a separating member.
  • the open end of the metal bellows 17 is in close contact with the inner wall of the medium accommodating chamber 23, and the inside of the metal bellows 17 is the pressure transmitting medium accommodating chamber 23.
  • the pressure transfer medium storage chamber 23 is formed in the wall of the liquid separator 20, and communicates with the pressure transfer medium through the pressure transfer medium inlet 16 that communicates the inside of the pressure transfer medium storage chamber 23 with the outside of the liquid separator 20. Pressure transfer medium can be introduced into medium storage chamber 23 Has been enabled.
  • the pressurized medium storage chamber 22 and the flow path 7 are connected to each other through a first conduit 13a. That is, one end of the first conduit 13a is connected to the outer end of the flow path 7, and the other end is bored in the wall of the separator 20, and is connected to the inside of the pressurized medium storage chamber 22 and the outside of the separator 20.
  • the communication connection between the pressurized medium housing chamber 22 and the flow path 7 is realized by connecting the medium to the pressurized medium discharge port 15 that communicates with the pressurized medium.
  • a heater 10 is mounted on the outer periphery of the liquid separator 20, and the outer periphery of the heater 10 is covered with a heat insulating material 11. Both media can be maintained at a predetermined temperature.
  • An external pressure booster 5 is provided separately from the frame 1, and the external pressure booster 5 is provided with a bore for filling industrial oil (hydraulic hydraulic oil in this embodiment) as a pressure transfer medium therein. 4 is formed.
  • a transmission medium discharge port 12 communicating with the inside of the bore 14 is formed in the bottom surface of the external intensifier 5 so as to penetrate therethrough.
  • the external intensifier 5 includes a ram 5a that can be inserted into the bore 14. ing.
  • the pressure transmission medium introduction port 16 and the pressure transmission medium discharge port 12 of the liquid separator 20 are connected to each other through a second conduit 18.
  • the industrial oil contained in the bore 14 as the pressure transfer medium is extruded from the bore 14 of the external pressure intensifier 5 through the pressure transfer medium discharge port 12 and the second pipeline 18
  • the pressure medium can be fed into the pressure medium storage chamber 23 through the pressure medium inlet 16.
  • a heater 10 is mounted on the outer periphery of the external intensifier 5, and the outer periphery of the heater 10 is covered with the heat insulating material 11. For this reason, when using a low-melting-point alloy that is in a solid state that is harder than liquid industrial oil at normal temperature and normal pressure (25 ° C., 1 atm) as the pressure transfer medium, heating is performed using the heater 10. It will be liquid and pumped.
  • the outer circumference of the first pipeline 13a and the second pipeline 18 is actually provided with a heater 10 over substantially the entire length thereof.
  • the outer periphery of 10 is covered with the heat insulating material 11! Therefore, both the pressure transmitting medium discharged from the external pressure intensifier 5 and the pressurized medium discharged from the separator 20 can be pumped while maintaining a predetermined temperature and a liquid state! RU
  • a method of performing the heating and pressurizing treatment by using the apparatus having the above-described configuration with an example of an aluminum material M as an article will be described.
  • a molten salt serving as a heat-pressure transmitting medium which has been heated and becomes a liquid is injected into the cavity 3 in advance.
  • a molten salt in this case, a commercially available complex salt having a melting point of 145 ° C (trade name “Baslic”) manufactured by Sankei Metal Industry Co., Ltd. was used.
  • the vessel 2 is heated by the heater 10 to raise the temperature of the molten salt injected into the cavity 3, and finally reaches a temperature of about 520 °, which is the temperature required for the densification treatment of the aluminum oxide M. Reach C and maintain that temperature.
  • the aluminum material M heated to a predetermined temperature about 520 ° C.
  • the cover 2a is moved to a position immediately above the container 2 by a transfer device (not shown), and after being pressed, the hydraulic cylinder 6 as a fixing means is actuated to push up the container 2 and raise the upper surface of the cover 2a.
  • the container 2 and the lid 2a are tightly fixed to each other by pressing against the ceiling surface of the frame 1, so that even if the molten salt in the cavity 3 is pressurized, the close contact between the lid 2a and the container 2 can be maintained. To do. At this time, a force for trapping a small amount of air in the air reservoir 8 is released to the outside by opening a valve (not shown) connected to the outer end of the air passage 9.
  • the inside of the flow passage 7 pierced in the lid 2a, the inside of the first conduit 13a, and the inside of the pressurized medium storage chamber 22 of the separator 20 are connected to the first conduit 13a.
  • Fill with molten salt as pressurized medium by means of the injection device.
  • the pressure transmission medium storage chamber 23 formed inside the metal bellows 17 as an isolation member in the medium storage chamber 21 is empty, the injected metal salt is The closed end of case 17 is pushed down and reduced to a minimum length.
  • the molten salt has the same composition as the heat and pressure transmission medium.
  • the inside of the bore 14 of the external pressure intensifier 5 is filled with hydraulic working oil as a pressure transfer medium by an injection device (not shown) connected to and connected to the bore 14.
  • the heater 10 attached to the lid 2a in which the flow path 7 is bored, the first conduit 13a, and the liquid separator 20 is at least the melting point of the molten salt as the pressurized medium.
  • the molten salt in the flow path 7, the first conduit 13 a and the pressurized medium storage chamber 22 is brought into a liquid state by heating.
  • the ram 5a of the external intensifier 5 is caused to enter the hydraulic oil in the bore 14 by a pressurizing cylinder (not shown), and the hydraulic oil is supplied with a predetermined pressure (about 210M in this embodiment). Pa). Then, since the hydraulic oil is already in a liquid state, it is discharged from the pressure transmission medium discharge port 17 drilled on the bottom surface of the external pressure intensifier 5 and is discharged through the second conduit 18 and the pressure transmission medium introduction port 16. Through the pressure transfer medium storage chamber 23. For this reason, the metal bellows 17 is pushed by the pressure transmitting medium from the inside of its closed end, and expands by overcoming the pressure of the pressure transmitting medium in the pressurized medium accommodating chamber 22 to expand the pressure transmitting medium storage.
  • the volume of the pressurized medium storage chamber 22 decreases. Then, an amount of the pressurized medium corresponding to the reduced volume of the pressurized medium storage chamber 22 is discharged from the pressurized medium discharge port 15 into the first pipe 13a, and the first pipe 13a
  • a predetermined pressure is instantaneously transmitted to the molten salt serving as the heat 'heat' pressure transmitting medium in the cavity 13 by the pressurized medium filled in the flow path 8, and the aluminum in the cavity 3 is discharged.
  • a predetermined pressure (approximately 210 MPa) acts on the rubber material M. As a result, the aluminum material M is densified by miniaturizing or eliminating the voids.
  • the volume of the bore 14 of the external pressurizing machine 4 is the sum of the maximum volume of the pressure transfer medium storage chamber 23 (when the metal bellows 17 is extended to the maximum) and the volume of the second conduit 18. Since the volume is sufficiently larger than the volume, reliable pressure transmission by the pressure transmitting medium is possible.
  • the molten salt flows from the air passage 9 communicating with the air reservoir 8 to the outside of the container 2. In this case, leakage of the molten salt is stopped by closing the valve (not shown) connected to the air passage 9 in this case.
  • the heat and pressure transfer medium in the cavity 3 is required. It is sufficient if the molten salt is heated to a temperature higher than the melting point of the molten salt without having to raise the temperature as much as the molten salt. Therefore, at the time of pressurization, the force at which the molten salt having a lower temperature than the molten salt in the cavity 3 flows into the air reservoir 8 from the flow path 7 is smaller than that of the cavity 3 in the capacity of the air reservoir 8. Therefore, the temperature of the molten salt in the cavity 3 hardly decreases, and does not affect the heat treatment of the aluminum oxide M.
  • the container for heating the molten salt in the cavity 3 is used.
  • the heater 10 mounted on the outer periphery of 2 the heater 10 can be provided inside the cavity 3 to directly heat the molten salt.
  • the outer periphery of the container 2 is covered with a heat insulator 11, and the outer periphery of the heater 10 between the heater 10 and the inner wall of the cavity 3 is covered with the heat insulator 11. .
  • a molten salt as a heat and pressure transfer medium is injected into the cavity 3 to cast an aluminum article M as a power article into the cavity 3.
  • a method is also possible in which the aluminum material M is first put into the cavity 3 and then a molten salt as a heat-pressure transmission medium is injected into the cavity 3.
  • the container 2 is heated in advance, the temperature of the inside of the cavity 3 is raised to a predetermined temperature, and then the heated article is put in the cavity 3, and then heated to the predetermined temperature.
  • the process proceeds with a step of injecting the molten salt into the cavity 3.
  • FIG. 1 is a schematic sectional view of Embodiment 1 of the apparatus of the present invention.
  • FIG. 2 is a schematic sectional view of Embodiment 2 of the device of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de compression et de traitement thermique qui permet d'exercer de manière sûre une force de compression sur un article par compression et chauffage/traitement de l'article par l'intermédiaire d'un milieu de transfert thermique/de pression maintenu à l'état liquide. Le dispositif comprend un récipient (2) qui présente un couvercle permettant de fermer et d'ouvrir une cavité adaptée amovible sur le récipient, qui présente des passages d'écoulement (7) permettant à la cavité de communiquer avec l'extérieur du récipient, une conduite (13) qui communique avec les extrémités extérieures des passages d'écoulement (7) à une extrémité de ceux-ci, un propulseur externe (5) qui communique avec l'autre extrémité de la conduite (13) et qui est monté séparé du récipient et permet de stocker un milieu de compression et de comprimer le milieu de transfert thermique/de pression dans la cavité par l'intermédiaire du milieu de compression, ainsi que des système de chauffage (10) qui sont installés dans le récipient, dans le propulseur externe et dans la conduite et qui permettent de chauffer le milieu de transfert thermique/de pression et le milieu de compression.
PCT/JP2005/000362 2004-01-14 2005-01-14 Procede et dispositif pour chauffer et comprimer un article par l'intermediaire d'un milieu de transfert thermique/de pression liquide WO2005068167A1 (fr)

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JP2005517072A JPWO2005068167A1 (ja) 2004-01-14 2005-01-14 液体の熱・圧力伝達媒体を介して物品を加熱及び加圧する方法及び装置

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JP2004-006339 2004-01-14
JP2004-011254 2004-01-20
JP2004011254 2004-01-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108254261A (zh) * 2016-12-28 2018-07-06 深圳市弗赛特科技股份有限公司 一种高温高压试验装置及试验方法
CN115947612A (zh) * 2022-12-09 2023-04-11 秦皇岛琨煜晶材科技有限公司 一种用于高温高压的传压介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59177302A (ja) * 1983-03-28 1984-10-08 Hitachi Metals Ltd カプセルの異常膨張防止方法及びカプセル
JPS61150798A (ja) * 1984-12-26 1986-07-09 Japan Steel Works Ltd:The 冷間静水圧減圧装置
JPH06226428A (ja) * 1992-12-21 1994-08-16 Metal Casting Technol Inc 物品の高密度化の方法と装置
JP2002361067A (ja) * 2001-06-01 2002-12-17 Kobe Steel Ltd 高圧容器装置
JP2004074176A (ja) * 2002-08-12 2004-03-11 Yuken Kogyo Co Ltd 液体の熱・圧力伝達媒体を介して物品に高温下で圧力を与える方法と装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59177302A (ja) * 1983-03-28 1984-10-08 Hitachi Metals Ltd カプセルの異常膨張防止方法及びカプセル
JPS61150798A (ja) * 1984-12-26 1986-07-09 Japan Steel Works Ltd:The 冷間静水圧減圧装置
JPH06226428A (ja) * 1992-12-21 1994-08-16 Metal Casting Technol Inc 物品の高密度化の方法と装置
JP2002361067A (ja) * 2001-06-01 2002-12-17 Kobe Steel Ltd 高圧容器装置
JP2004074176A (ja) * 2002-08-12 2004-03-11 Yuken Kogyo Co Ltd 液体の熱・圧力伝達媒体を介して物品に高温下で圧力を与える方法と装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108254261A (zh) * 2016-12-28 2018-07-06 深圳市弗赛特科技股份有限公司 一种高温高压试验装置及试验方法
CN115947612A (zh) * 2022-12-09 2023-04-11 秦皇岛琨煜晶材科技有限公司 一种用于高温高压的传压介质
CN115947612B (zh) * 2022-12-09 2023-09-12 秦皇岛琨煜晶材科技有限公司 一种用于高温高压的传压介质

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