HONEYCOMB TYPE METAL CARRIER AND CATALYTIC CONVERTER

• Main Authors: NOZAWA, Souhei, KONYA, Shogo, INAGUMA, Toru, GOTO, Yasuhide, MURAMATSU, Kei
• Format: Patent
• Language: English; French; German
• Published: 15.05.2024
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

[Problem] To achieve both an improvement in emission control performance of a catalytic converter and suppression of catalyst deterioration.[Solution] A honeycomb-type metal substrate formed by alternately layering a metal flat foil and a metal corrugated foil, a plurality of holes being formed in the metal flat foil and the metal corrugated foil, a burr having a small height being formed on an edge of each hole, among the metal flat foil and the metal corrugated foil, at least surfaces of the burrs are covered with an oxide coating film containing α-alumina, the following expressions (1) to (3) being satisfied when an average hole diameter of the plurality of holes is defined as D, an aperture ratio of the holes is defined as R, and an average height of the burrs is defined as L, 0.2mm≤D≤4.0mm5%≤R≤70%0.1μm≤L≤30μm