【摘要】 利用差示扫描量热仪 (DSC)、扫描电子显微镜 (SEM)和金相显微镜等手段对Cu P基中间合金进行了研究。结果表明 ,在二元共晶Cu P中间合金中加入一定量的Sn可制成低熔点的Cu 16Sn 8P中间合金 ;在此基础上研制出一种熔点为63 0℃左右的低熔点的多元Cu P基中间合金。与Cu P中间合金相比 ,该低熔点多元Cu P基中间合金对过共晶Al 2 4Si合金具有更好的变质效果。同时 ,该中间合金对ZL10 9合金也具有良好的变质效果。更多还原

【Abstract】 Cu-P base master alloy was studied by means of DSC, SEM and OM. The results showed that ternary Cu-16Sn-8P master alloy can be obtained by adding some Sn into binary eutectic Cu-P master alloy. Based on above results a multi-element Cu-P base master alloy with low melting point of 630℃ can be developed. Compared with binary Cu-P base master alloy, the new master alloy possessed better modification effects on hypereutectic Al-24Si alloy, meanwhile, the master alloy have good modification effects on ZL109 alloy also.更多还原