自蔓延高温合成法（SHS）制备Al-Ti-C中间合金的研究

Preparation of Al-Ti-C Master Alloy by SHS

摘要:

采用自蔓延高温合成（SHS）技术制备出了一种用于铝及铝合金晶粒细化的Al-Ti-C中间合金，并研究了压坯密度、压坯直径、预热温度对自蔓延高温合成Al-Ti-C中间合金时的燃烧温度及微观组织结构的影响。结果表明：采用SHS法合成的Al-Ti-C中间合金由Al，Al3Ti，TiC3相组成：本研究中压坯压力、预热温度对反应合成Al-Ti-C中间合金时的燃烧温度及产物的微观组织结构有较大的影响，而压坯直径变化对微观组织的影响不是很大。

Abstract:

Al-Ti-C master alloys used as grain refiners of the aluminum and its alloys have been prepared by self-propagating high-temperature synthesis (SHS) technology. The influence of pressure, diameter and preheating temperature of green-pellet on combustion temperature (T_c) during preparing Al-Ti-C master alloy and the microstructure of synthesized product has been investigated. The results show that synthesized master alloy consist of Al, Al_3Ti and TiC, and green-pellet pressure and preheating temperature have remarkable influence on combustion temperature (T_c) and microstructure of synthesized product. However, in this study, the influence of green-pellet diameter is unapparent.