铝硅合金中铁相存在的形态及影响其形成的因素  

Effect of various factors on morphology of iron phase in Al-Si alloy

作　　者：周晓霞[1] 张仁元[1] 刘银峁 

机构地区：[1]广东工业大学材料与能源学院 [2]陕西精密合金股份有限公司技术处,陕西西安710077

出　　处：《广东有色金属学报》2003年第1期51-54,共4页Journal of Guangdong Non-Ferrous Metals

摘　　要：铁是铝硅合金中最为常见的杂质,通常以β-铁相存在,对合金的力学性能有很大影响。降低铝硅合金中的铁含量,或使铁以α-铁相形式存在,可消除铁的有害影响。目前,减少β-铁相的方法主要有:加入锰、钴、铍等中和元素;熔体过热法;提高冷却速率等。要消除或减少铁在铝硅合金中的有害影响,必须综合考虑施用各种方法。Iron is the common impurity in Al--Si alloy. β--iron phase, usually existing in the alloy, effects its mechanical properties directly. When decreasing the content of iron in Al- Si alloy,or keeping α--iron phase existing, we can eliminate the bad influence of iron. At proseat, the main methods of reducing the amount of β--iron phase are as follows: adding the neutralized elements (such as Mn, Co, Be, etc.), overheating molten liquid, raising the cooling speed and so on. In order to eliminate or reduce the bad effect of iron in Al--Si alloy, many ways should be employed combinativly.

关 键 词：铝硅合金 铁相 形态 晶体形态学 β-铁相 α-铁相 熔体过热法 冷却速率 

分 类 号：TG146.21[一般工业技术—材料科学与工程]