HIP (hot isostatic pressing) manufacturing methods were developed to fabricate bi-metallic valve-bodies. The use of slurry cast molochite cores was demonstrated in industrial-scale bimetal parts: a core of 220 litres for a massive valve body was successfully slurry cast. The bimetal valve bodies were tested ultrasonically on-site and proven to be sound and with the desired cladding thickness.
In Finland based fabrication, special products are needed to be able to compete with mass production of lower cost countries. Therefore, a new manufacturing technology can give a competitive edge on special projects that require key components with high performance. To increase competitiveness of HIP-products in oil and gas business.
Commercialization is on-going and several offers are made. Two pilot valve bodies were completed from which one will be installed to customer’s plant.
Janne Nurminen, Metso Minerals Oy, Lokomo Steel Foundry.
Metso Minerals Oy, VTT, Aalto University