| 摘要 |
PURPOSE:To obtain an inexpensive metal honeycomb for a catalyst by a simple joining method by doing mutual diffusion joining or liquid phase joining of a flat plate and a corrugated plate consisting of ferrite stainless steel foil having specified Mo and forming a coating film of chrome oxide at high temp. CONSTITUTION:A flat plate and a corrugated plate consisting of ferrite stainless steel foil contg. 0.3-3% Mo and on which surface a coating film comprising primarily chrome oxide is formed at high temp. are subjected to mutual diffusion joining or liquid phase joining, allowing a metal honeycomb for a catalyst to be constituted. For example, in a honeycomb body housed in an outer cylinder 1, a diffusion stop material consisting essentially of titania is applied to a shadowed portion 3 when the honeycomb body is wound to prevent the diffusion joining from occurring. The part 2 indicated by a dotted line is the area to be joined. In this way, a foil material of low manufacturing cost is used, the joining is accelerated and oxidation resistance is secured, and also an assembling process is simplified to attain cost reduction. |
