摘要
镁合金在熔炼及压铸过程中易发生氧化燃烧。在众多的阻燃方法中,以合金化阻燃方法的效果最为明显。研究了加入混合轻稀土和Ca对AZ91D镁合金起燃温度的影响,观察了镁合金的金相组织,测试了各合金试样的起燃点,并进行了总结与比较。结果表明,Ca对提高AZ91D镁合金的起燃点有显著的作用,加入量为2%时,起燃点可提高至768℃;混合轻稀土对AZ91D镁合金的起燃点的影响与钙相比,效果更加明显,稀土加入量为2%左右,起燃点达到802℃。稀土更有利于提高AZ91D镁合金的起燃温度。
Magnesium is easy to oxidize or even bum during melting or die-casting. Among all the ways of ignition proof, the alloying is the most effective. The variation of ignition temperature caused by the addition of RE and Ca is discussed, the micro structure of the alloys is observed, and the ignition point is tested. And the effects each addictive obtained are summarized and compared with each other. The results show that, Calcium is benefi- cial to increase the ignition point of AZ91D magnesium alloy. The ignition temperature can rise to 768℃ when the addition of calcium is 2.0%. The effect of addition of rare-earth is better than that of calcium. The ignition temperature can rise to over 802℃ when the addition of rare-earth is 2.0%. So rare-earth is more beneficial to increase the ignition temperature.
出处
《重庆科技学院学报（自然科学版）》
CAS
2006年第2期36-38,共3页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
关键词
镁合金
钙
稀土
阻燃
Magnesium alloy
Calcium
Rare-earth
ignition proof
