半固态A356铝合金坯料切口断面特征  

Characteristics in the Cross Section of Semi-solid Billets of A356 Aluminum Alloy Incision

作　　者：王明[1,2] 刘旭波[1,2] 郭洪民[2,3] 杨湘杰[1,2] 

机构地区：[1]南昌大学机电工程学院 [2]江西省高性能精确成形重点实验室 [3]南昌大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2015年第7期720-722,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51261019);高校博士点专项科研基金资助项目(20113601110008)

摘　　要：研究了3组半固态坯料断面的组织特征。结果表明,通过坯料切口断面的宏观、微观特征,可以粗略地判断制备浆料的初生相的基本形态,大小和分布特征。合金熔体未经过处理的浆料组织,初生晶粒呈粗大的等轴晶团簇和粗大的枝晶形态,大小不一,分布不均匀;合金熔体经过螺旋线槽处理后的浆料组织,初生晶粒呈相对细小的均匀分布的球晶或近球晶形态。Three groups macro-micro characteristics in the cross section of A356semi-solid slurry incision were observed.The results show that the basic morphology,size and distribution of primary phases in the slurry prepared can be evaluated roughly through the characteristics in the cross section of the incision.The primary grains in untreated alloy melt present coarsening equiaxed grain and dendrite with varied size and uneven distribution.The primary grains in alloy treated through the helical curve duct present more tiny uniform distributed spheroidization or nearly spheroidizaed morphology.

关 键 词：浆料制备 切口断面 微观组织 螺旋线槽 三维重建 

分 类 号：TG292[金属学及工艺—铸造]