【摘要】 制备出一种新型的Al Ba中间合金变质剂,并探讨了它对Al Si合金的变质处理效果。试验结果表明,Al Ba中间合金对共晶Si的变质效果与Al Sr合金相当,可以使共晶Si由片状变为珊瑚状,显著改善Al Si合金的显微组织。另外,用Al Ba中间合金与Al P中间合金同时对Al Si合金进行变质处理时,还可达到双重变质效果。同时,用Al Ba中间合金时,变质持效时间比钠盐变质剂更长久,显示出较好的应用前景。更多还原

【Abstract】 A new type of modifier, AlBa master alloy is prepared, and its modification effect on AlSi alloy is also researched in this paper. The experimental results indicate that the influence of AlBa on eutectic silicon is similar to that of AlSr alloy. It can modify the eutectic silicon from flakelike to corallike in form, for which it can greatly improve the microstructure of AlSi alloy. When AlBa master alloy is added into AlSi alloy together with AlP master alloy, double modification effects can be deserved. In addition, the modification effect of AlBa master alloy can hold longer time than that of sodium. So AlBa master alloy displays preferable applicable foreground.更多还原