摘要
研究了Ａｌ－５Ｔｉ－１Ｂ和Ａｌ－３Ｂ中间合金对铸造铝合金Ａｌ－１２％Ｓｉ的α－Ａｌ晶粒的细化效果。结果表明，Ａｌ－３Ｂ中间合金的细化能力和抗延时衰减性能皆优于Ａｌ－５Ｔｉ－１Ｂ中间合金。分析认为，ＡｌＢ２和ＴｉＢ２相质点均为铸造Ａｌ－Ｓｉ合金中α－Ａｌ潜在的结晶核心，而Ａｌ３Ｔｉ相易被Ｓｉ原子毒化，失去作为结晶核心的作用。
The effect of α Al grain refinement of Al 12%Si cast alloy with Al 5Ti 1B and Al 3B master alloys has been studied,the results indicated that Al 3B master alloy had a stronger grain refining ability and persisted for longer time than with Al 5Ti 1B master alloy which is a excellent grain refining agent for Al 12%Si cast alloy.It has been found that AlB 2 and TiB 2 phases are potential crystallizing nuclei for α Al in Al Si cast alloys,but Al 3Ti phase is poisoned easily by Si atom and its ability to act as crystallization nuclei lost.
出处
《铸造》
EI
CAS
CSCD
北大核心
1997年第1期19-21,共3页
Foundry
