A flux composition for electro-slag over-lay welding of a cylindrical vessel with a strip electrode

摘要

A flux composition suitable for electro-slag over-lay welding a stainless steel on a circumferential inner surface of a cylindrical vessel with a strip electrode under controlling a flow of molten slag and metal with an outer electro-magnetic field, which contains 50-60% by weight of CaF₂, 10-20% by weight of SiO₂, 5-25% by weight of CaO and 10-30% by weight of AI₂0₃ in a ratio of Si0₂/CaF₂ of at least 0.20 and a ratio of CaO/SiO₂ of at least 0.50