Influence of La-Ce Mischmetal on Dendritical Arm Space and Ultimate Tensile Strength in ZL105 Alloys

摘要

The influence of pure La, pure Ce, (La+Ce) mischmetal on the dendritical arm space(LDAS) of ZL105 alloy in cylinderical casting was studied. The effects of adding amount of (La+ Ce) mischmetal on LDAs and ultimate tensile strength(b) were investigated, and the relationship between b and LDAS was founded. (La+Ce) mischmetal has stronger ability to refine LDAs than pure La or pure Ce. The proper adding amounts of it is 0.15% (mass fraction). LDAs has a remarkable effect on ah of casting, which can be predicted by the regression equation obtained in this work.