Advanced Casting Technology: Electroslag Remelting

摘要

Dept. of Metallurgical Engineering and Materials Science Indian Institute of Technology - Bombay, India Demand for cleaner and stronger metals in many fields of engineering is increasing. With the developments in nuclear, aviation and aerospace industries there is a need for high quality metals with improved properties. Components like turbine blades, rotor shafts for turbogenerators, aircraft engine shafts, high temperature bearings, etc work under severe temperature and stress conditions. The metals used for fabricating such parts should have superior chemical and mechanical properties. There is an increasing demand on the quality and performance of steels to meet its growing needs. Steels are produced by liquid metal route because of its cost advantage and flexibility. Steels obtained from conventional ingot are not suitable in critical applications where cleaner steels are required. Studies in metals have confirmed that sources of weakness in steels are non metallic inclusions like sulphides, oxides and dissolved gases. If care is taken in conventional steel making produce clean steel non metallic particles may enter the liquid metal from ladle lining.