Heat treatments are currently key steps in the production of optimum materials. Today’s foundry industry is being shaped by accelerating technological developments, with megatrends including autonomous driving, electromobility, 3D printing, Industry 4.0, the shortage of specialists and globalisation all having a major impact even as they simultaneously create new market opportunities.
Conductive heat transfer to secondary cooling water inside vertical direct chill casting tables contributes to undesirable thermal gradients. By integrating thermal insulation into tabletop refractory with high thermal resistance and low thermal expansion, metal delivery temperature variation is reduced without compromising joint integrity. This paper introduces the refractory design and includes a summary of computational and field validation studies.
Thanks to the standardized modules of the mobile, integrated heat treatment plants, the ALUVATION system makes it possible to develop processes through to series maturity without having installed the final production plant. This significantly reduces development times. Plants can be installed within just a few days with the same configuration at different locations, ensuring constant heat treatment results.
Many aluminium components and semi-finished products must undergo an optimal, reproducible heat treatment process to achieve the desired mechanical properties, depending on the alloy and geometry.
The heat treatment processes are manifold and so is the required flexibility of the plant systems.
Nevertheless, it makes sense to combine the heat treatment plants from modular systems.
Ceramic Foam Filtration is a well known process for effectively removing inclusions from the molten metal in DC casting. It has however limitations for the removal of small particles. In industrial application and for high metal flowrate 40 ppi is almost the limit. Filter pads with fine pores are available but the priming is more difficult. Solutions that have been developed to improve priming of the fine pore filter pads are complex and expensive. A new priming technique was developed and tested both in laboratory and plant conditions.
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