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WO2019064975A1 - Dispositif de cémentation au carbone - Google Patents

Dispositif de cémentation au carbone Download PDF

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Publication number
WO2019064975A1
WO2019064975A1 PCT/JP2018/030285 JP2018030285W WO2019064975A1 WO 2019064975 A1 WO2019064975 A1 WO 2019064975A1 JP 2018030285 W JP2018030285 W JP 2018030285W WO 2019064975 A1 WO2019064975 A1 WO 2019064975A1
Authority
WO
WIPO (PCT)
Prior art keywords
carburizing
heater
gas
chamber
inert gas
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/030285
Other languages
English (en)
Japanese (ja)
Inventor
勝俣　和彦
正敏 三塚
治 坂本
喬裕 永田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
IHI Machinery and Furnace Co Ltd
Original Assignee
IHI Corp
IHI Machinery and Furnace Co 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 IHI Corp, IHI Machinery and Furnace Co Ltd filed Critical IHI Corp
Priority to CN201880055317.1A priority Critical patent/CN111065756B/zh
Priority to JP2019544401A priority patent/JP6736781B2/ja
Priority to EP18861380.6A priority patent/EP3690077B1/fr
Publication of WO2019064975A1 publication Critical patent/WO2019064975A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B5/14—Arrangements of heating devices
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories or equipment specially adapted for furnaces of these types

Definitions

  • the present disclosure relates to a carburizing apparatus.
  • Priority is claimed on Japanese Patent Application No. 2017-186206, filed September 27, 2017, the content of which is incorporated herein by reference.
  • Patent Document 1 describes burnout in a carburizing apparatus. That is, when the object to be treated is carburized, carbon (ie, soot) caused by the carburizing gas adheres to the inside of the carburizing apparatus, but in burnout, the carburizing apparatus is introduced by introducing air into the carburizing apparatus. It is a process which burns and removes carbon (soot) adhering to the inside (especially heater etc.) of Such burnout is disclosed in Patent Document 2 in addition to Patent Document 1.
  • burnout is performed between carburizing processes on a workpiece using a carburizing apparatus, burnout can be a factor that reduces the operation rate of the carburizing apparatus (that is, the processing efficiency of the workpiece). . Therefore, there is a demand for the carburizing apparatus operator to reduce the burnout time and number as much as possible.
  • the heater of the carburizing apparatus has a surface temperature higher than that of other parts, so that the adhesion of carbon (soot) is more significant than that of the other parts. Therefore, it is easy to reduce the operation rate of the carburizing apparatus (processing efficiency of the object to be treated) by the adhesion of carbon (soot) to the heater.
  • This indication is made in view of the situation mentioned above, and aims at controlling or preventing adhesion of carbon ( ⁇ ) to a heater.
  • a carburizing apparatus includes: a furnace body that accommodates an object to be treated; a plurality of heaters provided in the furnace body; a plurality of protective members covering the plurality of heaters; A carburizing gas supply unit for supplying the inert gas, an inert gas supply unit for supplying an inert gas to the gap between the heater and the protective member, and air for burnout in the gap between the heater and the protective member And an air supply unit.
  • the plurality of heaters may be rod-shaped members extending in the horizontal direction in the furnace body, and may be disposed to sandwich the object to be processed in the vertical direction.
  • the plurality of heaters may be rod-shaped members extending in the vertical direction in the furnace body, and may be disposed to sandwich the object to be processed in the horizontal direction.
  • the heater is an electric heater whose first end is connected to a power source and whose second end is grounded, and the inert gas supply unit is connected from the first end to the second end. May be configured to supply an inert gas towards the
  • the inert gas is supplied to the gap between the heater and the protective member, adhesion of carbon (soot) to the heater can be suppressed or prevented.
  • FIG. 1 is a front sectional view of a carburizing apparatus according to an embodiment of the present disclosure. It is a side cross-section electrogram of the upper electrode part in one embodiment of this indication.
  • FIG. 5 is a top cross-sectional view of the upper electrode portion in an embodiment of the present disclosure. It is a side cross-sectional electrogram of the lower electrode part in one embodiment of this indication.
  • FIG. 7 is a top cross-sectional view of the lower electrode portion in an embodiment of the present disclosure.
  • the carburizing apparatus A includes a chamber 1, a heat insulating container 2, a hearth 3, a plurality of heater units 4, an upper electrode portion 5, an upper ground portion 6, a lower electrode portion 7 and a lower portion.
  • An earth unit 8, a carburizing gas pipe 9, an exhaust pipe 10, a gas supply unit 11, a gas recovery unit 12, a carburizing gas supply unit 13 and the like are provided.
  • the chamber 1 corresponds to the furnace body of the present disclosure.
  • the gas supply unit 11 corresponds to the inert gas supply unit and the air supply unit of the present disclosure.
  • the carburizing apparatus A carburizes the object X accommodated in the chamber 1. That is, the carburizing apparatus A causes the carbon (carbon atoms) to enter the surface of the object to be treated X by heating the object to be treated X to a high temperature exceeding 500 ° C. and setting the carburizing chamber to a carburizing gas atmosphere. Form a carburized layer.
  • the to-be-processed object X which is a process target of the carburizing apparatus A is a metal component to which surface hardness rises by a carburized layer.
  • the chamber 1 is a rectangular parallelepiped main body container (metal container), and an open / close door (not shown) is provided on one side surface (surface on the near side in FIG. 1). Also, the chamber 1 is electrically grounded.
  • the heat insulation container 2 is provided in the chamber 1, has a rectangular parallelepiped shape, and is formed of a heat insulation material (ceramic material) having a predetermined heat insulation performance.
  • An internal space (a rectangular parallelepiped space) of the heat insulation container 2 is a carburizing chamber P that accommodates the object X to be treated.
  • the hearth 3 is a mounting table on which the workpiece X is placed, and is provided inside and below the heat insulation container 2.
  • the hearth 3 is formed of a ceramic material such as alumina.
  • the heat insulating plate which forms one side of the heat insulation container 2 is provided inside the opening and closing door mentioned above. That is, the heat insulation container 2 is comprised from the openable-closable heat insulating board provided inside the opening-closing door, and five heat-insulation boards fixedly installed.
  • the object to be treated X is accommodated in the carburizing chamber P by opening the open / close door provided on the front side of FIG.
  • the left and right direction in FIG. 1 is the width direction of the carburizing apparatus A, that is, the chamber 1 and the heat insulating container 2, and the vertical direction in FIG. 1 is the height direction of the carburizing apparatus A.
  • the direction orthogonal to is the depth direction of the carburizing apparatus A.
  • the plurality of heater units 4 are rod-like members having a predetermined length and extending in the horizontal direction, and are vertically disposed to sandwich the object X in the vertical direction. That is, as shown in FIG. 1, the plurality of heater units 4 are provided at the upper and lower portions in the heat insulating container 2 in a posture in which the axial direction is the width direction of the carburizing apparatus A (chamber 1 and heat insulating container 2). The heater units 4 are provided at predetermined intervals in the depth direction of the carburizing apparatus A (the chamber 1 and the heat insulating container 2) as shown in FIGS. 2A and 2B and FIGS. 3A and 3B.
  • seven heater units 4 are provided in the depth direction of the upper part (upper part of the carburizing chamber P) in the heat insulation container 2 as shown in FIGS. 2A and 2B, and as shown in FIGS. 3A and 3B There are eight in the depth direction below the.
  • the seven heater units 4 provided in the upper part of the carburizing chamber P are upper heater units 4A.
  • the upper heater unit 4A is supported at its first end (left end) by the upper electrode portion 5 and at its second end (right end) by the upper ground portion 6.
  • the eight heater units 4 provided in the lower part of the carburizing chamber P are lower heater units 4B.
  • the lower heater unit 4B is supported at its first end (left end) by the lower electrode portion 7 and at its second end (right end) by the lower ground portion 8.
  • the heater units 4 each include a heater main body 4a and a protective tube 4b.
  • the heater main body 4a has a first end located on the upper electrode portion 5 or lower electrode portion 7 side connected to the power supply, and a second end located on the upper earth portion 6 or lower earth portion 8 side is grounded.
  • the heater main body 4a is a columnar electric heater (resistance heating element) that generates heat when power is supplied from the power supply to the first end, and is, for example, a ceramic heater made of ceramic or a graphite heater made of graphite.
  • the heater main body 4a corresponds to the heater of the present disclosure
  • the protective tube 4b corresponds to the protective member of the present disclosure.
  • the protective tube 4b is a ceramic circular tubular member (straight tube) having an inner diameter larger than the diameter of the heater main body 4a, and is provided so as to cover the heater main body 4a.
  • the inner surface of the protective tube 4b and the surface of the heater main body 4a are an annular surface and a cylindrical surface which are concentrically and parallel to each other at a predetermined interval.
  • an inert gas G or a compressed air K for burnout flows between the inner surface of the protective tube 4b and the surface of the heater main body 4a.
  • the upper electrode portion 5 is a structure that mechanically supports the first end (left end) of the upper heater unit 4A, and seven upper heaters are provided at the upper left portion of the chamber 1 as shown in FIGS. 1 and 2A, 2B. It is provided to cover the first end (left end) of the unit 4A as a whole.
  • the upper electrode unit 5 includes an enclosing member 5a, seven receiving members 5b, and the like.
  • the enclosing member 5a is a metal member formed in a substantially rectangular parallelepiped shape, and is provided at the upper left portion of the chamber 1 so as to surround the first end (left end) of the seven upper heater units 4A as a whole.
  • the space inside the enclosing member 5a that is, the space for accommodating the first end (left end) of the seven upper heater units 4A is a substantially enclosed space, and the inert gas G or the compressed air K for burnout is supplied from the gas supply unit 11. It is a gas supply chamber S1 to be supplied.
  • the receiving member 5b is provided corresponding to each upper heater unit 4A, and is an insulating material that receives the load of the first end (left end) of the upper heater unit 4A.
  • the receiving member 5b is a substantially rectangular parallelepiped molded body having a V-shaped groove formed at the top as shown in FIG. 2A, and the V-shaped groove has a first end (left end) of the upper heater unit 4A. It is placed in the engaged state.
  • the upper ground portion 6 is a structure for supporting the second end (right end) of the upper heater unit 4A, and as shown in FIG. 1, the second end (right end) of the seven upper heater units 4A ) Is provided as a whole.
  • the upper ground portion 6 is provided with a surrounding member 6a and seven receiving members 6b provided corresponding to the respective upper heater units 4A.
  • the enclosing member 6a is a metal member formed in a substantially rectangular parallelepiped shape, and is provided at the upper right portion of the chamber 1 so as to entirely surround the second ends (right ends) of the seven upper heater units 4A.
  • the space inside the enclosing member 6a that is, the space for accommodating the second end (right end) of the seven upper heater units 4A is a substantially enclosed space, and a gas recovery for recovering the inert gas G or the compressed air K for burnout etc. It is a room C1.
  • the receiving member 6b is an insulating material that receives the load of the second end (right end) of the upper heater unit 4A.
  • the receiving member 6b is a substantially rectangular parallelepiped molded body having a V-shaped groove formed in the upper portion similarly to the receiving member 5b described above, and the V-shaped groove forms the second end (right end of the upper heater unit 4A). ) Is placed in the engaged state.
  • the lower electrode portion 7 is a structure supporting the first end (left end) of the lower heater unit 4B, and as shown in FIGS. 1 and 3A and 3B, at the lower left portion of the chamber 1, eight lower heater units 4B are provided. It is provided to cover the first end (left end) as a whole.
  • the lower electrode portion 7 includes an enclosing member 7a, eight receiving members 7b, and the like.
  • the enclosing member 7a is a metal member formed in a substantially rectangular parallelepiped shape, and is provided at the lower left portion of the chamber 1 so as to surround the first end (left end) of the eight lower heater units 4B as a whole.
  • the space inside the enclosing member 7a that is, the space for accommodating the first end (left end) of the eight lower heater units 4B is a substantially enclosed space, and the inert gas G or the compressed air K for burnout is supplied from the gas supply unit 11. It is a gas supply chamber S2 to be supplied.
  • the receiving member 7b is provided corresponding to each lower heater unit 4B, and is an insulating material that receives the load of the first end (left end) of the lower heater unit 4B.
  • the receiving member 5b is a substantially rectangular parallelepiped molded body having a V-shaped groove formed in the upper part as shown in FIG. 3A, and the V-shaped groove has a first end (left end) of the lower heater unit 4B. It is placed in the engaged state.
  • the lower ground portion 8 is a structure supporting the second end (right end) of the lower heater unit 4B, and the second end (right end) of eight lower heater units 4B at the lower right portion of the chamber 1 as shown in FIG. ) Is provided as a whole.
  • the lower ground portion 8 includes an enclosing member 8a and eight receiving members 8b provided corresponding to the respective lower heater units 4B.
  • the enclosing member 8a is a member formed in a substantially rectangular parallelepiped shape, and is provided at the lower right portion of the chamber 1 so as to entirely surround the second ends (right ends) of the eight lower heater units 4B.
  • a space for accommodating the inside of the enclosing member 8a, that is, the second end (right end) of the eight lower heater units 4B is a substantially enclosed space, and a gas recovery chamber for recovering the inert gas G or the compressed air K for burnout. It is C2.
  • the receiving member 8b is an insulating material that receives the load of the second end (right end) of the lower heater unit 4B.
  • the receiving member 8b is a substantially rectangular parallelepiped molded body having a V-shaped groove formed in the upper portion similarly to the receiving member 6b described above, and the V-shaped groove forms the second end (right end of the lower heater unit 4B). ) Is placed in the engaged state.
  • the carburizing gas pipe 9 is a tubular member for introducing a carburizing gas into the carburizing chamber P.
  • the tip of the carburizing gas pipe 9 opens into the carburizing chamber P, and the rear end of the carburizing gas pipe 9 communicates with the carburizing gas supply unit 13.
  • the carburizing gas pipe 9 discharges the carburizing gas having a predetermined flow rate supplied from the carburizing gas supply unit 13 to the carburizing chamber P.
  • the exhaust pipe 10 is a tubular member having one end open to the carburizing chamber P and the other end connected to a vacuum pump (not shown).
  • the exhaust pipe 10 exhausts the gas in the carburizing chamber P (the carburizing gas or the pyrolysis gas obtained by pyrolysis of the carburizing gas) to the outside through a vacuum pump.
  • the gas supply unit 11 is connected to the two gas supply chambers S1 and S2, and supplies the inert gas G or the compressed air K for burnout to the gas supply chambers S1 and S2.
  • the inert gas G is, for example, nitrogen gas (N 2 ) pressurized to a predetermined pressure higher than normal pressure
  • the compressed air K is air pressurized to a predetermined pressure higher than normal pressure.
  • the gas recovery unit 12 is connected to the two gas recovery chambers C1 and C2, and recovers the inert gas G or the compressed air K or the like in the gas recovery chambers C1 and C2.
  • the carburizing gas supply unit 13 supplies the carburizing gas to the carburizing chamber P via the carburizing gas pipe 9.
  • the carburizing gas is, for example, acetylene gas (C 2 H 2 ).
  • the operation of the carburizing apparatus A will be described in detail.
  • the object to be treated X is accommodated in the carburizing chamber P and placed on the hearth 3 by opening the opening and closing door provided in the chamber 1 Be done. Then, the carburizing chamber P is sealed by closing the open / close door.
  • the carburizing chamber P is set to a predetermined pressure (carburizing pressure) by operating the vacuum pump in this state.
  • each heater unit 4 upper heater unit 4A and lower heater unit 4B
  • the carburizing gas supply unit 13 operates in such a pressure environment and temperature environment to continuously supply the carburizing gas having a predetermined flow rate from the carburizing gas pipe 9 to the carburizing chamber P, and by operating the vacuum pump. Gas present in the carburizing chamber P is exhausted from the exhaust pipe 10 to the outside. That is, the carburizing chamber P is maintained at a predetermined carburizing pressure by simultaneously operating the carburizing gas supply unit 13 and the vacuum pump.
  • the carburizing chamber P is maintained at the carburizing pressure and the carburizing temperature over a predetermined time (carburizing time), and carbon atoms derived from the carburizing gas infiltrate into the inside from the surface of the object X during this time, A carburized layer is formed from the surface of the object X to a predetermined depth (carburized depth). That is, in the carburizing chamber P, carbon atoms and a pyrolysis gas are generated by thermal decomposition of the carburizing gas, and a part of carbon atoms (carbon) generated by the thermal decomposition form a carburized layer.
  • the inert gas G in a compressed state is supplied to the upper electrode 5 and the lower electrode 7 by the gas supply unit 11 operating in parallel with the formation of the carburized layer, and the gas recovery unit 12 operates.
  • the inert gas G is recovered from the upper ground portion 6 and the lower ground portion 8. That is, in the gap between the heater main body 4a and the protective tube 4b in each heater unit 4 (upper heater unit 4A and lower heater unit 4B), inert gas G is directed from the upper electrode portion 5 to the upper earth portion 6, The lower electrode portion 7 always circulates to the lower earth portion 8.
  • a part of the pyrolysis gas and the carburizing gas generated by the pyrolysis of the carburizing gas is exhausted from the exhaust pipe 10 to the outside.
  • the carburizing gas is acetylene (C 2 H 2 )
  • hydrogen gas (H 2 ) is generated as pyrolysis gas, and this hydrogen gas (H 2 ) is exhausted from the carburizing chamber P via the exhaust pipe 10 .
  • the crucible (carbon) is a substance which is electrically conductive and can change the electric resistance of the heater body 4a. That is, when the carburizing apparatus A is operated for a long time, the electric resistance of the heater main body 4a gradually changes from the initial state due to soot (carbon), so the calorific value of the heater main body 4a may gradually change. . In this case, in the carburizing apparatus A, it becomes difficult to heat the carburizing chamber P to a desired carburizing temperature.
  • an inert gas G is formed in the gap between the heater main body 4a and the protective pipe 4b in each heater unit 4 (upper heater unit 4A and lower heater unit 4B) during carburizing of the object X Is constantly distributed, so that it is possible to suppress or prevent the deposition of soot (carbon) in the gap between the heater main body 4a and the protective tube 4b. Therefore, according to the present embodiment, adhesion of soot (carbon) to the surface of the heater main body 4a can be suppressed or prevented.
  • the inert gas G is circulated in the gap between the heater main body 4a and the protective tube 4b during the carburizing process, so adhesion of soot (carbon) to the heater main body 4a can be suppressed or prevented. Therefore, it is possible to improve the operation rate of the carburizing apparatus more than before.
  • burnout processing is performed regularly or irregularly. That is, there may be a case where adhesion of soot (carbon) to the surface of the heater main body 4a can not be sufficiently prevented only by the circulation of the inert gas G.
  • compressed air is supplied from the gas supply unit 11 to the upper electrode unit 5 and the lower electrode unit 7 in order to eliminate such a concern, so that it exists in the gap between the heater main body 4a and the protective tube 4b.
  • compressed air and soot (carbon) are recovered from the upper earth portion 6 and the lower earth portion 8 to the gas recovery portion 12.
  • soot (carbon) present in the gap between the heater main body 4a and the protective tube 4b is sufficiently removed, and the electric resistance of the heater main body 4a returns to the initial state. That is, according to the present embodiment, the burnout process can more reliably prevent the deposition of soot (carbon) on the heater main body 4a.
  • the heater main body 4 a and the protective tube 4 b the wrinkles present in the gap can be effectively removed. That is, since the heater main body 4a has a predetermined electric resistance, the upper electrode portion 5 and the lower electrode portion 7 connected to the heating power source are on the high voltage side, while the upper earth portion 6 The lower ground portion 8 is on the low voltage side.
  • the crucible tends to adhere to the high pressure side rather than the low pressure side.
  • the inert gas G is supplied to the high pressure side where the soot easily adheres without any influence of pressure loss when passing through the gap between the heater main body 4a and the protective tube 4b. Wrinkles present in the gap with the protective tube 4b can be effectively removed.
  • the plurality of heater units 4 are arranged to extend horizontally in the heat insulation container 2 and to sandwich the object X in the vertical direction, but the present disclosure is not limited thereto.
  • the plurality of heater units 4 may extend in the vertical direction in the heat insulation container 2 and may be arranged to sandwich the object X in the horizontal direction.
  • the inert gas G is supplied to the upper electrode portion 5 and the lower electrode portion 7 and recovered from the upper earth portion 6 and the lower earth portion 8, but the present disclosure is limited thereto I will not.
  • the inert gas G is supplied to the upper ground portion 6 and the lower ground portion 8 It may be recovered from the upper electrode portion 5 and the lower electrode portion 7.
  • the lower part of the article to be treated X is more difficult to heat than the upper part.
  • the number (eight) of the lower heater units 4B is larger than the number (seven) of the upper heater units 4A.
  • the present disclosure is not limited thereto.
  • the numbers of the upper heater unit 4A and the lower heater unit 4B may be the same.
  • the inert gas G is constantly circulated in the gap between the heater main body 4a and the protective tube 4b during the carburizing treatment of the object to be treated X, but the present disclosure is not limited thereto.
  • the inert gas G may be circulated intermittently, or the inert gas G may be circulated only in a specific time zone of carburizing treatment over a predetermined period, for example, only in the latter half of the carburizing treatment.
  • a carburizing apparatus G inert gas K compressed air S1, S2 gas supply chamber C1, C2 gas recovery chamber P carburizing chamber X object to be treated 1 chamber 1 (furnace body) DESCRIPTION OF SYMBOLS 2 heat insulation container 3 hearth 4 heater unit 4A upper heater unit 4B lower heater unit 4a heater main body (heater) 4b Protective tube (protective member) 5 upper electrode portion 5a enclosing member 5b receiving member 6 upper grounding portion 6a enclosing member 6b receiving member 7 lower electrode portion 7a enclosing member 7b receiving member 8 lower grounding portion 8a enclosing member 8b receiving member 9 carburizing gas pipe 10 exhaust pipe 11 gas supply Part 12 Gas recovery part 13 Carburizing gas supply part

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un dispositif de cémentation au carbone (A), qui comprend : un corps de four (1) destiné à recevoir un objet à traiter; de multiples éléments chauffants (4a) disposés dans le corps de four; de multiples éléments de protection (4b) destinés à recouvrir les multiples éléments chauffants; une unité d'alimentation en gaz de cémentation au carbone (13) destinée à introduire un gaz de cémentation au carbone dans le corps de four; une unité d'alimentation en gaz inerte destinée à introduire un gaz inerte dans l'espace ménagé entre les éléments chauffants et les éléments de protection; et une unité d'alimentation en air destinée introduire de l'air de combustion dans l'espace ménagé entre les éléments chauffants et les éléments de protection.
PCT/JP2018/030285 2017-09-27 2018-08-14 Dispositif de cémentation au carbone Ceased WO2019064975A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880055317.1A CN111065756B (zh) 2017-09-27 2018-08-14 渗碳装置
JP2019544401A JP6736781B2 (ja) 2017-09-27 2018-08-14 浸炭装置
EP18861380.6A EP3690077B1 (fr) 2017-09-27 2018-08-14 Dispositif de cémentation au carbone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017186206 2017-09-27
JP2017-186206 2017-09-27

Publications (1)

Publication Number Publication Date
WO2019064975A1 true WO2019064975A1 (fr) 2019-04-04

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PCT/JP2018/030285 Ceased WO2019064975A1 (fr) 2017-09-27 2018-08-14 Dispositif de cémentation au carbone

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EP (1) EP3690077B1 (fr)
JP (1) JP6736781B2 (fr)
CN (1) CN111065756B (fr)
WO (1) WO2019064975A1 (fr)

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JPS5830586B2 (ja) 1979-11-20 1983-06-30 義郎 中松 屋外看板
JP2007131936A (ja) 2005-11-14 2007-05-31 Nachi Fujikoshi Corp 真空浸炭炉のバーンアウト方法
WO2014007046A1 (fr) * 2012-07-04 2014-01-09 関東冶金工業株式会社 Procédé de traitement thermique, dispositif de traitement thermique et système de traitement thermique
JP5830586B1 (ja) * 2014-07-23 2015-12-09 株式会社Ihi 浸炭装置
JP2017186206A (ja) 2016-04-07 2017-10-12 京セラ株式会社 フェライト焼結体およびインダクタ

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