Nippon Steel Corporation

Atuhiko Imai

Mikio Yamanaka

Masayuki Kasuya

Kazutoshi Iwami

Tamio Noda

Tadayuki Otani

Hitoshi Ohta

Yoshikuni Tokunaga

Toru Utsumi

Fujio Shimizu

Toshihiro Egami

In order to improve solid phase diffusion bondability at contact portions between a metal flat foil and a metal corrugated foil together constituting a metal honeycomb body for a catalyst converter used for purifying an exhaust gas and to improve engine durability, the present invention comprises one or combination of the following structures; a structure wherein at least one of the metal foils has a foil thickness of less than 40 &mgr;m; a structure wherein an Al content after bonding is at least 3%; a structure wherein the surface condition of both metal foils in a width-wise direction has a predetermined surface coarseness or a predetermined surface shape and condition; and a structure wherein the width of contact portions between both metal foils is at least five times the thickness of the metal foils. In order to further improve engine durability, the present invention disposes an unbonded portion inside the honeycomb body having the construction described above, or disposes a shell on the outer periphery of the honeycomb body.

Metal honeycomb body for exhaust gas purification catalyst and method for producing the same

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Tokai, Japan

Atuhiko Imai