| 简介 |
The invention relates to the use of a dimensionally stable iron-chrome-aluminum film that comprises a support strip consisting of (in weight %) 16 to 25 % chrome, 2 to 4 % aluminum, 0.1 to 3 % silicon, not more than 0.5 % manganese, 0.01 to 0.3 % zirconium and/or 0.01 to 0.1 % rare-earth elements and/or yttrium, hafnium, titanium, not more than 0.01 % Mg, not more than 0.1 % Ca, remainder iron and the usual impurities resulting from the process. The strip further comprises an aluminum or aluminum alloy coating either on one or both sides thereof. In order to obtain a shrinkage in the longitudinal or transversal direction of < 0.5 % during a homogenization annealing treatment following the rolling or a later fabrication step, the total coating (in weight %) is in the range of 0.5 to 5 % of the support strip weight. The inventive support strip is used as a support material for catalysts, especially for exhaust catalysts, or as a resistor material or heat conductor. |
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