Anti-burning loss of CuCrZr alloys melted under non-vacuum conditions

Oxidation is one of the key factors of high strength high conductivity CuCrZr alloys melted in the non-vacuum condition which limits its industrialized continuous cast. This paper investigates the effects of anti-oxidation and coverage materials on the non-vacuum melting process in order to slow the mass loss of Zr. The results indicate that Mg addition can effectively slow the mass loss of Zr at the initial stage of melting process below 1 350 ℃. After melting for 30 min, Zr residual keeps the same level; the mass loss of Zr is very marked because the Mg protection is greatly weakened when the melting temperature reaches 1 350 ℃. Composite salt can effectively improve the residual of Zr with 40.86 % of residual of Zr after melting for 30 min. The XRD patterns of slag show that no any other reactants but salts exist in the slag when covered by composite salt.