WO2024005198A1 - 接合体、腐食性ガス処理装置およびトラクタ - Google Patents

接合体、腐食性ガス処理装置およびトラクタ Download PDF

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Publication number
WO2024005198A1
WO2024005198A1 PCT/JP2023/024449 JP2023024449W WO2024005198A1 WO 2024005198 A1 WO2024005198 A1 WO 2024005198A1 JP 2023024449 W JP2023024449 W JP 2023024449W WO 2024005198 A1 WO2024005198 A1 WO 2024005198A1
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WO
WIPO (PCT)
Prior art keywords
insulating member
joined body
alloy
holding member
brazing
Prior art date
Application number
PCT/JP2023/024449
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English (en)
French (fr)
Japanese (ja)
Inventor
洋之 根本
Original Assignee
京セラ株式会社
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 京セラ株式会社 filed Critical 京セラ株式会社
Priority to JP2024531000A priority Critical patent/JPWO2024005198A1/ja
Publication of WO2024005198A1 publication Critical patent/WO2024005198A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case

Definitions

  • the present disclosure relates to a joined body, a corrosive gas treatment device, and a tractor that are applied to airtight terminals and the like.
  • Patent Document 1 proposes a purification device in which a heater is provided in the exhaust system upstream of the filter, and the heater is energized to raise the exhaust temperature during filter regeneration in order to efficiently regenerate the filter. .
  • an airtight terminal as proposed in Patent Document 2 When energizing a terminal portion of a heater or the like, for example, an airtight terminal as proposed in Patent Document 2 is considered.
  • This airtight terminal consists of a metal cylinder joined to a through hole of an airtight container, a cylindrical ceramic insulator inserted into the through hole of the metal cylinder, and a terminal part inserted into the through hole of the ceramic insulator at both ends.
  • the airtight terminal is supported by an insulator fixed to the inner surface of the airtight container or a metal cylinder inside the airtight container of the current-carrying conductor.
  • Patent Document 2 discloses that a thermosetting insulator is injected into the gap between the current-carrying conductor and the ceramic insulator and the gap between the ceramic insulator and the metal tube to create a gap between the current-carrying conductor and the ceramic insulator. Further, an airtight terminal in which a ceramic insulator and a metal cylinder are fixed has also been proposed.
  • JP2013-11256A Japanese Patent Application Publication No. 07-153512
  • the joined body of the present disclosure includes an insulating member containing ceramics, and a holding member that surrounds the insulating member and has an enlarged diameter portion whose inner diameter increases, and the outer surface of the insulating member and the inner surface of the holding member are in contact with each other. It has a contact portion and a first brazing portion that joins the outer surface of the insulating member and the inner surface of the holding member. The contact portion and the first brazing portion are located with the enlarged diameter portion interposed therebetween.
  • another joined body of the present disclosure includes an insulating member containing ceramics, a holding member surrounding the insulating member and having an enlarged diameter portion whose inner diameter increases, and a sleeve disposed between the insulating member and the holding member. It has a first brazed part that joins the insulating member and the sleeve, and a second brazed part that joins the holding member and the sleeve.
  • the corrosive gas treatment device of the present disclosure includes the above-mentioned joined body.
  • a tractor of the present disclosure is equipped with the above corrosive gas treatment device.
  • FIG. 1 is a schematic cross-sectional view showing a joined body according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view showing a joined body according to another embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view showing still another example of the joined body according to the embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view showing still another example of the joined body according to the embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view showing still another example of the joined body according to the embodiment of the present disclosure.
  • the airtight terminal proposed in Patent Document 2 requires a large space inside the airtight container to accommodate the insulator that supports the airtight terminal, and if a large space cannot be secured, such a Airtight terminals cannot be used. Furthermore, if the airtight insulated terminal proposed as a modified example is used in a space exposed to corrosive gas, the thermosetting insulator is likely to be eroded by the corrosive gas.
  • FIG. 1 is a schematic cross-sectional view showing a joined body 1 according to this embodiment.
  • the joined body 1 shown in FIG. 1 is used as an airtight terminal, and includes an insulating member 2 including a cylindrical ceramic having a through hole 21 in the axial direction, and a holding member 3 that holds the insulating member 2. has. Inside the through hole 21 of the insulating member 2, at least a portion of the conductive member through which the current passes is located.
  • the conductive member is used, for example, to introduce current into a thermal control element such as a heater.
  • This thermal control element is installed in an exhaust system upstream of a filter included in an engine mounted on a vehicle such as an agricultural machine such as a tractor, a construction machine, a ship, or an automobile.
  • the thermal control element increases the temperature by supplying electricity through the conductive member, thereby efficiently regenerating the filter.
  • the exhaust gas is under high pressure and contains corrosive gases such as nitrogen oxides and sulfur oxides. Therefore, airtight terminals used in corrosive gas treatment equipment (purification equipment) used in such corrosive gases are required to have high airtightness.
  • arrow P indicates pressure due to corrosive gas, etc.
  • a high-pressure side A1 on which a heat control element such as a heater is installed, and a low-pressure side A2, located on the opposite side, with the joined body 1 interposed therebetween.
  • the space on the low pressure side A2 has a lower pressure than the space on the high pressure side A1, and has a pressure equal to or close to atmospheric pressure.
  • the insulating member 2 is an insulating material containing, for example, alumina (Al 2 O 3 ) ceramics, etc., and has the function of maintaining electrical insulation and holding the conductive member located within the through hole 21 .
  • alumina Al 2 O 3
  • the insulating member 2 includes Al 2 O tertiary ceramics, raw material powder and solvent containing alumina, silicon oxide (SiO 2 ), magnesium hydroxide (Mg(OH) 2 ), calcium carbonate (CaCO 3 ), etc.
  • a slurry is obtained by mixing and pulverizing some water, for example, in a mill. Examples of the mill include a vibration mill, bead mill, sand mill, agitator mill, and ball mill.
  • the insulating member 2 is obtained by filling this into a press mold of a predetermined shape, pressurizing it with a predetermined pressure to obtain a molded body, and then firing it at a temperature of 1550° C. or higher and 1750° C. or lower.
  • the holding member 3 that holds the insulating member 2 has an enlarged diameter portion 31 that surrounds the insulating member 2 and has an enlarged inner diameter.
  • a contact portion 32 and a first brazing portion 33 are located with the enlarged diameter portion 31 in between.
  • the first brazing portion 33 joins the outer surface of the low voltage side A2 of the insulating member 2 and the inner surface of the holding member 3.
  • the first brazed portion 33 may be the entire inner surface of the holding member 3 that is in contact with the outer surface of the low voltage side A2 of the insulating member 2, or may be only a part thereof.
  • the holding member 3 is made of Ti, Ti alloy, Mo, Cu-Ni, Cu, Fe-Co alloy, Fe-Co-C alloy, Fe-Ni alloy, Fe-Ni-Co alloy, SUS430, SUS434, It may contain ferritic stainless steel such as SUS405, martensitic stainless steel such as SUS403, US410, SUS431, austenitic stainless steel such as SUS201, SUS301, SUS305, or nickel-based superalloy.
  • the holding member 3 is obtained by forming these metals into a predetermined shape by pressure molding or the like, and subjecting them to grinding if necessary.
  • the surface of the holding member 3 to which the first brazing portion 33 is brazed may be previously plated with Ni to a thickness of approximately 1 ⁇ m or more and 3 ⁇ m or less in order to improve wettability with the brazing material.
  • the inner surface of the holding member 3 in the contact portion 32 may have an average value of arithmetic mean roughness (Ra) in the roughness curve of 1 ⁇ m or more, 2 ⁇ m or more, and 6.5 ⁇ m or less.
  • the thickness may be 6.3 ⁇ m or less.
  • the inner surface has a cutting level difference (R ⁇ c) representing the difference between the cutting level at a load length ratio of 25% and the cutting level at a load length ratio of 75% in the roughness curve (hereinafter simply called the cutting level).
  • the average value of the difference (referred to as R ⁇ c) may be 11 ⁇ m or less, or 10 ⁇ m or less.
  • the outer surface of the insulating member 2 at the contact portion 32 may have an average value of arithmetic mean roughness (Ra) in the roughness curve of 0.6 ⁇ m or more, or 0.8 ⁇ m or more and 2 ⁇ m or less.
  • the thickness may be 1.6 ⁇ m or less.
  • the average value of the cutting level difference (R ⁇ c) of the outer surface may be 3.1 ⁇ m or less, or 2.4 ⁇ m or less.
  • the difference between the average value of the arithmetic mean roughness (Ra) of the inner surface and the average value of the arithmetic mean roughness (Ra) of the outer surface is preferably 4.7 ⁇ m or less.
  • the difference between the average value of the cutting level difference (R ⁇ c) on the inner surface and the average value of the cutting level difference (R ⁇ c) on the outer surface is preferably 7.6 ⁇ m or less.
  • the arithmetic mean roughness (Ra) and cutting level difference (R ⁇ c) were measured in accordance with JIS B 0601:2001 using a laser microscope (manufactured by Keyence Corporation, ultra-deep color 3D shape measuring microscope (VK-X1000 or its successor). (model)).
  • the illumination method is coaxial illumination
  • the measurement magnification is 120 times
  • the cutoff value ⁇ c is 0.08 mm
  • there is no cutoff value ⁇ f and there is correction of the end effect.
  • the measurement range per location from the inner surface of the holding member 3 to be measured is, for example, 2792 ⁇ m ⁇ 2093 ⁇ m, and two locations may be set at both ends along the axial direction.
  • four lines to be measured are drawn at approximately equal intervals along the axial direction (longitudinal direction in each measurement range), and the line roughness is measured.
  • the length of each line to be measured is 2640 ⁇ m.
  • the average values of the arithmetic mean roughness (Ra) and the cutting level difference (R ⁇ c) may be calculated using the respective measured values obtained for each line.
  • the average values of the arithmetic mean roughness (Ra) and the cutting level difference (R ⁇ c) of the outer surface of the insulating member 2 can also be determined by the same method as described above.
  • the gap G between the inner surface forming the expanded diameter portion 31 of the holding member 3 and the outer surface of the insulating member 2 facing the inner surface is preferably 2 mm or less. Since the gap G is narrow in this way, the flow rate of corrosive gas leaking from the gap G can be reduced. Both sides of the enlarged diameter portion 31 in the axial direction are inclined surfaces with respect to the axial direction. Therefore, stress concentration occurring on both sides of the enlarged diameter portion 31 can be reduced more than when both sides are orthogonal surfaces perpendicular to the axial direction.
  • the first brazed portion 33 is located in a space on the opposite side (i.e., low-pressure side A2) from the space on the side where the thermal control element is installed (i.e., high-pressure side A1). Therefore, corrosive gas moving from the high-pressure side A1 toward the low-pressure side A2 becomes difficult to touch, and high bonding strength and high airtightness can be maintained for a long period of time.
  • the insulating member 2 has a metallized layer 4 facing the first brazing part 33 on the outer surface.
  • the metallized layer 4 may have extending portions 41, 41 extending beyond both ends of the first brazing portion 33 in the axial direction in a cross-sectional view parallel to the axial direction of the insulating member 2. Since the metallized layer 4 has the extensions 41, 41, the reliability of the bonding is improved compared to the case where the extensions 41, 41 are not provided.
  • the metallized layer 4 is formed, for example, by the following procedure. First, a metal paste containing at least one metal powder selected from the group consisting of tungsten (W), molybdenum (Mo), and manganese (Mn) as a main component is applied onto the outer surface of the insulating member 2. Thereafter, the metallized layer 4 is formed by firing at a temperature of about 1300° C. in a hydrogen atmosphere (for example, a mixed gas of 75% hydrogen gas and 25% nitrogen gas). In addition, in order to improve the wettability with the brazing material and to reduce oxidation of the metal contained in the metal paste, Ni plating may be applied to the surface of the metallized layer 4 to a thickness of approximately 1 ⁇ m or more and 3 ⁇ m or less. . The thickness of the metallized layer 4 is, for example, 10 ⁇ m or more and 50 ⁇ m or less.
  • the brazing material for example, Ag-Cu brazing material (BAg-8, BAg-8A, BAg-8B), etc. can be used.
  • a brazing material such as Ag-Cu brazing material
  • the joined body 1 of this embodiment is used, for example, as an airtight terminal in a corrosive gas treatment device (purification device) that requires high airtightness.
  • the corrosive gas treatment device can be mounted on a vehicle or the like and can greatly contribute to the purification of exhaust gas.
  • FIG. 2 Note that the same constituent members as in FIG. 1 are given the same reference numerals and their explanations will be omitted.
  • the joined body 10 shown in FIG. 2 is used as an airtight terminal like the above embodiment.
  • the joined body 10 includes a cylindrical insulating member 2 containing ceramic, a holding member 5 that surrounds the insulating member 2 and holds the insulating member 2, and an insulating member 2 and the holding member 5. and a sleeve 6 disposed between them.
  • the holding member 5 has an enlarged diameter portion 51 whose inner diameter is enlarged.
  • the insulating member 2 and the sleeve 6 are joined at a first brazed portion 7.
  • the holding member 5 and the sleeve 6 are joined at a second brazed portion 8.
  • the insulating member 2 has a through hole 21 that penetrates in the axial direction, and a conductive member that introduces current to a heat control element such as a heater is located within this through hole 21.
  • the first brazing portion 7 and the second brazing portion 8 are located in a space on the low pressure side A2 opposite to a space on the high pressure side A1 where the thermal control element is installed. Since the first brazed portion 7 and the second brazed portion 8 are formed at a position away from the thermal control element, the influence of corrosive gas leaking from the gap between the holding member 5 and the insulating member 2 can be reduced. The airtightness is maintained for a long period of time.
  • the gap G between the inner surface of the holding member 5 forming the enlarged diameter portion 51 and the outer surface of the insulating member 2 facing the inner surface may be 2 mm or less.
  • the sleeve 6 has a bent portion 61 whose diameter decreases from the second brazed portion 8 toward the first brazed portion 7. As a result, a space is created by the holding member 5, the insulating member 2, and the sleeve 6 (that is, an internal space formed by the enlarged diameter portion 51), so that stress concentration is alleviated.
  • the bent portion 61 is preferably inclined with respect to the axial direction of the insulating member 2. Thereby, stress concentration occurring at both ends of the bent portion 61 is reduced more than when the bent portion 61 is perpendicular to the axial direction.
  • the thickness of the sleeve 6 is preferably 0.3 mm or more and 0.7 mm or less.
  • the insulating member 2 may include ceramics such as alumina (Al 2 O 3 ) ceramics.
  • the holding member 5 is made of, for example, Ti, Ti alloy, Mo, Cu-Ni, Cu, Fe-Co alloy, Fe-Co-C alloy, Fe-Ni alloy, Fe-Ni-Co alloy, SUS430, SUS434. , ferritic stainless steel such as SUS405, martensitic stainless steel such as SUS403, US410, SUS431, austenitic stainless steel such as SUS201, SUS301, SUS305, or nickel-based superalloy.
  • the sleeve 6 may include an elastically deformable material.
  • the sleeve 6 may contain, for example, Ti, Ti alloy, Mo, Cu-Ni, Cu, Fe-Co alloy, Fe-Co-C alloy, Fe-Ni alloy, or Fe-Ni-Co alloy. good.
  • each of the holding member 5, the sleeve 6, and the insulating member 2 can be selected in this order so that they decrease with an appropriate difference. Further, the difference in coefficient of linear expansion between the holding member 5 and the sleeve 6 and the difference in coefficient of linear expansion between the sleeve 6 and the insulating member 2 can be selected so as to decrease in this order. Thereby, an appropriate compressive force acts on the insulating member 2, and airtightness becomes high. Further, when the sleeve 6 is made of an elastically deformable material, both the insulating member 2 and the holding member 5 are pressurized. As a result, the reliability of bonding is improved.
  • the insulating member 2 has a metallized layer 11 facing the first brazed portion 7 on the outer surface.
  • the metallized layer 11 extends beyond both ends of the first brazed portion 7 in the axial direction in a cross-sectional view parallel to the axial direction of the insulating member 2 . This improves the reliability of the bonding compared to the case where the metallized layer 11 does not extend beyond both ends of the first brazed portion 7 in the axial direction.
  • the first brazed portion 7 may be formed on the entire surface of the contact area between the insulating member 2 and the sleeve 6, or may be formed on a part thereof.
  • the second brazed portion 8 may be formed on the entire surface of the contact area between the holding member 5 and the sleeve 6, or may be formed on a part thereof.
  • the brazing material for forming the first brazing part 7 and the second brazing part 8 the above-mentioned Ag-Cu brazing material (BAg-8, BAg-8A, BAg-8B), etc. can be used. The rest is the same as the previous embodiment.
  • the joined bodies 1 and 10 of the present embodiment when corrosive gas moves from one side (for example, high pressure side A1) to the other side (for example, low pressure side A2), the first brazed parts 7, 33 are located in locations that are difficult to come into contact with corrosive gases. As a result, the joined bodies 1 and 10 can maintain high joint strength and high airtightness over a long period of time. Therefore, the joined bodies 1 and 10 do not require a large space unlike conventional airtight terminals.
  • the insulating member in the present disclosure is not limited to a cylindrical shape as shown in FIGS. 1 and 2, but can be made of columnar, conical, or frustum-shaped ceramics as shown in FIGS. 3A to 3C, for example.
  • the insulating members 12, 13, and 14 may be included.
  • 3A to 3C show a joined body including insulating members 12, 13, and 14, and holding members 15, 16, and 17 having enlarged diameter portions that surround the insulating members 12, 13, and 14, and have enlarged inner diameters. ing.
  • Such a bonded body can be used as a window member for transmitting electromagnetic waves for introducing electromagnetic waves into semiconductor manufacturing equipment or outputting high frequency waves from an accelerator. The rest is the same as the previous embodiment, so detailed explanation will be omitted.
  • the joined body of the present disclosure is not limited to application to airtight terminals, but can also be used, for example, for discharge tubes with holding parts, insulators, vacuum switches, vacuum containers, etc.
  • this discharge tube with a holding part is, for example, a component that constitutes a reactor for purifying exhaust gas generated in an internal combustion engine.
  • the discharge tube with a holding portion includes a discharge tube having a cylindrical insulating tube, and an annular holding member that holds the discharge tube on the outer peripheral side.
  • the insulator When the bonded body is an insulator, this insulator is used, for example, in physical and chemical equipment such as vacuum equipment and accelerators.
  • the insulator includes a holding member having a pair of annular bases disposed opposite to each other, an annular wall having an enlarged diameter portion on each main surface on the side where the bases face each other, and both ends of the insulator. and a cylindrical insulating member whose outer surface is joined to the inner surface of each of the wall sections.
  • the conjugate When the conjugate is a vacuum switch, it is used in physical and chemical equipment. Its structure is the same as that of the above-mentioned insulator.
  • this vacuum container is, for example, a container for accommodating a lens for an electron microscope inside.
  • the vacuum container includes a disc-shaped insulating member (window part) containing ceramic, and a bottomed cylindrical holding member (main body part) having an enlarged diameter part whose inner diameter increases.
  • the vacuum container has a contact portion where the outer surface of the insulating member and the inner surface of the holding member abut on one side, and the outer surface of the insulating member and the inner surface of the holding member on the other side, with the enlarged diameter portion in between. It has a first brazed portion to be joined.
  • the joined body is a discharge tube with a holding part, an insulator, a vacuum switch, or a vacuum container
  • the outer surface of the insulating member and the inner surface of the holding member should be placed on one side with the enlarged diameter part provided on the holding member in between. and a first brazing portion that joins the outer surface of the insulating member and the inner surface of the holding member.
  • the first brazing portion includes a holding member that surrounds the insulating member and has an expanded diameter portion whose inner diameter increases, and a sleeve disposed between the insulating member and the holding member, and joins the insulating member and the sleeve. and a second brazing portion that joins the holding member and the sleeve.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Materials Engineering (AREA)
  • Connection Of Plates (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2023/024449 2022-06-30 2023-06-30 接合体、腐食性ガス処理装置およびトラクタ WO2024005198A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07153511A (ja) * 1993-11-26 1995-06-16 Sumitomo Osaka Cement Co Ltd 気密絶縁端子
JP2021144835A (ja) * 2020-03-11 2021-09-24 京セラ株式会社 気密端子
WO2021241276A1 (ja) * 2020-05-25 2021-12-02 京セラ株式会社 ヒータ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58159176U (ja) * 1982-04-19 1983-10-24 日機装株式会社 サブマ−ジドポンプ用気密端子
JP4423211B2 (ja) * 2005-01-28 2010-03-03 京セラ株式会社 ロウ付け構造および気密端子

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07153511A (ja) * 1993-11-26 1995-06-16 Sumitomo Osaka Cement Co Ltd 気密絶縁端子
JP2021144835A (ja) * 2020-03-11 2021-09-24 京セラ株式会社 気密端子
WO2021241276A1 (ja) * 2020-05-25 2021-12-02 京セラ株式会社 ヒータ

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