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首页> 外文期刊>Metallurgia Italiana >Production of aluminium coated ferritic stainless steel by co-rolling and annealing
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Production of aluminium coated ferritic stainless steel by co-rolling and annealing

机译：通过共同轧制和退火生产铝涂层铁素体不锈钢

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摘要

Ferritic stainless steel enriched with aluminium (>7 percent) represents the best material for the production of substrates in catalytic converters because of its good corrosion resistance at high temperature (700-1000 deg C). Enriching steel surface with aluminium avoids brittleness problems related to the traditional metallurgical process and, due to the high superficial aluminium concentration, enhances the Al_2O_3 scale formation in the early stages of the oxidation process. Among several techniques, the co-rolling process appears to be a promising technology for enriching ferritic stainless steel surface with aluminium. That versatile technology produces, at room temperature, a very adherent aluminium coating without affecting the structural and mechanical properties of the substrate. In this work annealed AISI 430 ferritic stainless steel has been cold rolled together with aluminium foil to form an Al-steel-Al sandwich. The aim of the work was to enhance the oxidation resistance through a controlled oxidation of a thin aluminium layer. The diffusion bonding obtained via an annealing treatment was evaluated studying the concentration profiles as a function of process temperature. Intermetallics and for solid solutions formed were characterized by X-Ray Diffraction (XRD).
机译：富含铝（> 7％）的铁素体不锈钢代表了在催化转化器中生产基材的最佳材料，因为它在高温（700-1000摄氏度）下具有良好的耐腐蚀性。用铝富集钢表面避免了与传统冶金工艺相关的脆性问题，并且由于高的表观铝浓度，在氧化工艺的早期阶段增强了Al_2O_3结垢的形成。在几种技术中，共同轧制工艺似乎是一种用铝富集铁素体不锈钢表面的有前途的技术。这项通用技术可在室温下产生非常附着的铝涂层，而不会影响基材的结构和机械性能。在这项工作中，将退火的AISI 430铁素体不锈钢与铝箔一起冷轧以形成Al-steel-Al三明治。这项工作的目的是通过控制薄铝层的氧化来增强抗氧化性。通过研究浓度分布随工艺温度的变化，对通过退火处理获得的扩散结合进行了评估。通过X射线衍射（XRD）表征金属间化合物和形成的固溶体。

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