METAL CARRIER FOR EXHAUST GAS PURIFYING CATALYST

摘要

PURPOSE: To prevent generation of cracks on a honeycomb body and improve the durability of a metal carrier by making the brazing material amount per unit area of a brazing section between an intermediate cylinder and the honeycomb body less than the brazing material amount per unit area between the intermediate section and an outer cylinder. CONSTITUTION: A cylindrical honeycomb body 1 is formed by rolled concentrically and alternately a metal flat sheet 2 and a metal corrugated sheet 3 and the outer periphery of the honeycomb body 1 is covered with a metal intermediate cylinder 4, while the outer periphery of the intermediate cylinder 4 is covered with a metal carrier cylinder 5, and a catalyst is carried on the honeycomb body 1. Then the flat sheet 2 is brazed with the corrugated sheet 3 only on the upstream and downstream ends of the honeycomb body 1 when viewed from the flowing direction X of exhaust gas and the outer periphery of the honeycomb body 1. The axial direction length L1 of a brazing material layer 7 is made longer than the axial direction length L2 of a brazing material layer 8, and the thickness t1 of the brazing material layer 7 is made thinner than the thickness t2 of the brazing material layer 8 to make the brazing material amount per unit area of the brazing material layer 7 less than that of the brazing material layer 8.