[특허]Method for brazing a metallic honeycomb body for exhaust gas treatment and apparatus for carrying out the method

Method for brazing a metallic honeycomb body for exhaust gas treatment and apparatus for carrying out the method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B23K-031/02
출원번호	US-0050095 (2011-03-17)
등록번호	US-8261962 (2012-09-11)
우선권정보	DE-10 2008 047 498 (2008-09-17)
발명자 / 주소	Caspar, Hans-Peter Kotthoff, Hubertus Gutowski, Jörg Chauchet, Dietmar Wieres, Ludwig
출원인 / 주소	EMITEC Gesellschaft fuer Emissionstechnologie mbH
대리인 / 주소	Greenberg, Laurence A.
인용정보	피인용 횟수 : 0 인용 특허 : 28

초록 ▼

A method for brazing a metallic honeycomb body (1) for exhaust gas treatment, includes at least: a) pretreatment of a honeycomb body (1) at a temperature above 400° C.;b) cooling the honeycomb body (1);c) brazing the honeycomb body (1) at a temperature in a range of from 1050° C. to 1100° C. under a

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1. A method for brazing a metallic honeycomb body for exhaust gas treatment, the method comprising the following steps carried out in a continuous-flow process: a) pretreating a honeycomb body at a temperature above 400° C. in a first furnace to remove water and grease from the honeycomb body in a cleaning step;b) cooling the honeycomb body;c) brazing the honeycomb body in a second furnace at a temperature in a range of from 1050° C. to 1100° C. under atmospheric pressure;d) cooling the honeycomb body; andcarrying out permanent process gas scavenging at least during steps a) and c). 2. The method according to claim 1, which further comprises carrying out a temperature increase predominantly during step c). 3. The method according to claim 1, wherein the process gas has a purity of at least 99.999% during step c). 4. The method according to claim 1, which further comprises forming the honeycomb body of an iron material having chrome and aluminum as main alloying elements, and a chrome fraction being greater than an aluminum fraction by at least a factor of 3. 5. The method according to claim 1, which further comprises carrying out the brazing step with a nickel-based brazing material having chrome, phosphorus and silicon as main additives. 6. The method according to claim 1, which further comprises oxidizing the honeycomb body after step c) in a step e). 7. The method according to claim 1, which further comprises monitoring an oxygen content during step c). 8. The method according to claim 1, which further comprises forming the honeycomb body with aluminum as an alloying material. 9. The method according to claim 1, which further comprises forming the honeycomb body with aluminum as an alloying element having an aluminum fraction lying in a range of 3 to 6% by weight. 10. The method according to claim 1, which further comprises: e) exposing the honeycomb body to an oxidative environment with temperatures above 600 ° C. after step c). 11. The method according to claim 10, which further comprises, during step e), providing surfaces of the honeycomb body with an aluminum oxide layer serving for corrosion protection. 12. The method according to claim 10, which further comprises, during step e), providing surfaces of the honeycomb body with an aluminum oxide layer preventing diffusion bonds at foil contact points not being brazed to one another but bearing one against the other. 13. The method according to claim 10, which further comprises maintaining step e) for 20 to 60 minutes. 14. The method according to claim 10, which further comprises carrying out step e) directly following step c). 15. The method according to claim 10, which further comprises carrying out cooling and then step e) following step c). 16. The method according to claim 10, which further comprises carrying out steps c) and e) in one common furnace having different ambient conditions separated from one another by separation devices. 17. The method according to claim 16, which further comprises selecting the different ambient conditions as a presence of oxygen and a protective gas. 18. The method according to claim 16, which further comprises selecting the separation devices as slides or intermediate walls. 19. The method according to claim 10, which further comprises carrying out step e) at temperatures below a melting temperature of brazing material, permitting steps e) and c) to be carried out in direct spatial proximity. 20. The method according to claim 19, which further comprises carrying out step e) at 50° C. below the melting temperature of the brazing material or lower.

이 특허에 인용된 특허 (28)

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Hirota, Norihide; Sugimoto, Yusaku; Hasegawa, Kazuhiko, Layered heat-resistant alloy plate and method of producing the same.
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Otani, Tadayuki; Imai, Atuhiko; Kasuya, Masayuki; Iwami, Kazutoshi; Utsumi, Toru; Yamanaka, Mikio; Ohta, Hitoshi; Tokunaga, Yoshikuni; Shimizu, Fujio; Egami, Toshihiro; Noda, Tamio, Metal honeycomb body for exhaust gas purification catalyst and method for producing the same.
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Okazaki, Yuichi; Kasuya, Masayuki; Kako, Takuzo; Yamanaka, Mikio, Metallic carrier, for automobile exhaust gas purification, made of thin metal foil and method of producing the same.
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Nakagawa Toshikazu (Tokai JPX) Ishikawa Yasushi (Tokai JPX) Tsushima Sadao (Futtsu JPX) Yashiro Masao (Tokai JPX) Ohta Hitoshi (Tokai JPX), Metallic honeycomb body for supporting catalyst for automobiles and process for producing the same.
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Barten Brian L. (Lockport NY) Halstead Gary A. (Lockport NY), Method and apparatus for convection brazing of aluminum heat exchangers.
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Irish Michael J. (Tonawanda) Halstead Gary A. (Lockport) Barten Brian L. (Lockport NY), Method and apparatus for convection brazing of aluminum heat exchangers.
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Konya Shogo (Kawasaki JPX) Okamoto Akira (Ube JPX) Yoshizaki Kouji (Numazu JPX), Method for brazing heat resisting alloy having on its surface insulating oxide film and preheat type metallic carrier fo.
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Matsuoka Katsunori,JPX ; Nakajima Jun,JPX, Method for manufacturing honeycomb structures made of titanium.
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Wieres Ludwig,DEX, Method for producing a metal structure and apparatus for metallic joining of sheet-metal layers of a metal structure.
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Kurth, Ferdi; Bergmann, Andree; Schlotmann, Helge; Faust, Günther; Wieres, Ludwig, Method for producing a sintered honeycomb body.
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Yasuda Shinya,JPX ; Takatsuki Toyohiko,JPX ; Fujiyama Mamoru,JPX ; Haita Hiroshi,JPX, Method for sealing vacuum structure.
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Ishikawa Kazunori (Nikko JPX) Asami Shigenori (Nikko JPX), Method of manufacturing heat-exchanger.
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Doko Takeyoshi (Kiyotakinakayasudo JPX), Method of producing aluminum alloy heat-exchanger.
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Emmerich Kurt (Alzenau DEX), Nickel-base solder for high-temperature solder joints.
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Inaba Junpei,JPX, Nickel-based brazing material, method of brazing with the brazing material, process for producing EGR cooler with the brazing material, and EGR cooler.
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Rabinkin Anatol, Nickel-chromium-based brazing alloys.
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Br체ck,Rolf; Hirth,Peter; Konieczny,Katrin, Process and device for producing metallic honeycomb bodies using radiation heaters.
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Das Santosh K. (Randolph NJ) Chang Chin-Fong (Morris Plains NJ), Rapidly solidified aluminum-germanium base brazing alloys.
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Winterbottom Walter L. (Farmington Hills MI) Badgley J. Scott (Dearborn MI) Baumgartner Linda J. (Livonia MI), Thermal degreasing in reactive atmospheres and subsequent brazing of aluminum-based sheets or parts.
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