摘要
在不同P、RE添加量下对P-RE复合变质和未变质的过共晶铝硅合金的冲击韧度进行了研究。结果表明,P-RE复合变质明显提高了合金的冲击韧度,当加入0.08%的P和0.6%的RE时,合金的冲击韧度达到最佳,合金的冲击韧度从未变质的9.7862J/cm2提高到11.0098J/cm2,提高了12.5%。冲击断裂机制主要是脆性断裂,也伴随有韧度断裂。合金冲击韧度的改善与复合变质引起的共晶硅和初晶硅颗粒的细化和合金强度、塑性的提高有关。
The impact toughness of modified and non-modified hypereutectic Al-20%Si alloys were studied in the different content of P and RE. The results show that the complex modification of P and RE can obviously improve impact toughness of hypereutectic Al-20%Si alloy. When the tested alloys modified with 0.08%P and 0.6%RE, the optimal impact toughness of modified alloys is obtained. The impact toughness is increased to 11.0098J/cm2 from 9.786 2 J/cm2 of the unmodified alloy, increased by 12.5%.With the toughness f...
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2008年第12期975-977,共3页
Special Casting & Nonferrous Alloys
关键词
过共晶铝硅合金
复合变质
冲击韧度
hypereutectic Al-Si alloy
complex modification
Impact toughness
