Preparation of nanocrystal modificator and its modification mechanism  

作　　者：董天顺 崔春翔 刘双进 杨薇 刘福才 

机构地区：[1]School of Materials Science and Engineering, Hebei University of Technology

出　　处：《中国有色金属学会会刊：英文版》2007年第4期823-827,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(E2006000025) supported by the Natural Science Foundation of Hebei Province, China

摘　　要：In order to increase the modifying effect, the Cu-P master alloy was rapidly solidified with melt-spin method, and the nano-sized ribbon was gained at 105?106 ℃/s. Subsequently, ZL109 alloy was modified by nanocrystal and massive Cu-P master alloy, respectively, with molten metal casting method. The results show that the microscopic structure of ZL109 alloy modified by nanocrystal Cu-P master alloy is better than that modified by massive Cu-P master alloy, the original crystal silicon and eutectic silicon are refined more effectively and the mechanical properties are increased evidently: the tensile-strength is increased by 25%, the elongation is increased by 32.26% and the hardness is increased by 17.2%. Therefore, the melt-spin treatment is a feasible method to improve the modifying effect of Cu-P master alloy.In order to increase the modifying effect, the Cu-P master alloy was rapidly solidified with melt-spin method, and the nano-sized ribbon was gained at 10^5-10^6 ℃/s. Subsequently, ZL109 alloy was modified by nanocrystal and massive Cu-P master alloy, respectively, with molten metal casting method. The results show that the microscopic structure of ZL109 alloy modified by nanocrystal Cu-P master alloy is better than that modified by massive Cu-P master alloy, the original crystal silicon and eutectic silicon are refined more effectively and the mechanical properties are increased evidently： the tensile-strength is increased by 25%, the elongation is increased by 32.26% and the hardness is increased by 17.2%. Therefore, the melt-spin treatment is a feasible method to improve the modifying effect of Cu-P master alloy.

关 键 词：铜磷中间合金 ZL109合金 熔化旋转 快速凝固 纳米晶 

分 类 号：TB383.1[一般工业技术—材料科学与工程]