石墨表面状态及加入方式对制备Al-Ti-C晶粒细化剂的影响

The Effects of the Surface Condition of Graphite and the Ways to Add Graphite on Preparing Al-Ti-C Grain Refiner

采用不同表面状态的石墨粉和以不同方式加入到Al Ti合金的方法来制备Al Ti C晶粒细化剂。采用金相显微镜观察了Al Ti C合金的微观组织 ,采用Leco装置检测了Al Ti C合金中的碳含量。结果表明 ,在制备Al Ti C合金过程中 ,石墨表面经预处理后可以提高石墨收得率 。

With different surface condition and in different way graphite was added into Al Ti alloy to prepare the Al Ti C grain refiner. The microstructure of Al Ti C alloy was observed by OM , the carbon magnitude of Al Ti C grain refiner was detected by Leco device . The results showed in the process of preparing Al Ti C grain refiner the yield factor of graphite could be improved by pretreatment of graphite and dramtically more if adding aluminum powder and additive R in graphite powder.