摘要
研究了合金元素Bi的加入对18％Si、22％Si和26％Si铝硅合金流动性、线膨胀的影响规律。结果表明：Bi的加入可以显著提高Al-xSi（x=18-26）的流动性，在Al—26Si中加入3％的Bi时，其螺旋试样长度比不加Bi时增加了约43％；Bi的加入同时还影响到合金的线膨胀，对Al-18Si来说，Bi的加入会降低其平均线膨胀率；对Al-22Si和Al-26Si来说，Bi加入有增加其线膨胀的趋势。此外，Bi的加入使得该类过共晶铝硅合金在250℃到300℃之间有相变发生。
The effects on the fluidity and linear expansion of the 18%Si, 22%Si and 26%Si aluminum-silicon alloys by adding Bi were studied. The results show that the addition of Bi can significantly increase the Al-xSi （x=18-26） fluidity, the addition of 3% Bi in Al-26Si, the spiral sample length increased by about 43% than without Bi; Bi addition also affects alloy expansion, the average line expansion rate of Al-18Si was reduced because of adding Bi; for Al-22Si and Al-26Si, linear expansion trend growth with the addition of Bi. In addition, the phase transformation occurs from 250 ℃to 300 ℃ in the hypereutectic aluminum silicon alloy with adding Bi.
出处
《铸造》
CAS
CSCD
北大核心
2014年第7期659-661,664,共4页
Foundry
基金
四川省科技厅科学研究基金项目(2011JYZ029)
关键词
铝硅合金
流动性
线膨胀
铸造性能
aluminum silicon alloy
fluidity
linear expansion
casting properties
