Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第11卷    第1期    总第40期    2001年2月

[PDF全文下载]        

    

文章编号:1004-0609(2001)01-0047-04
预变形及液固两相区等温处理对ZA27合金铸态组织的影响
谢 辉, 许丽君,袁中岳, 郑红星, 郭学锋

(西安理工大学 材料科学与工程学院,西安 710048)

摘 要: 研究了固液两相区等温处理对铸态ZA27合金初生相形貌的影响。结果表明: 在固液两相区进行等温处理时,枝晶熔断受固液界面处原子的扩散控制,提高等温温度、延长等温时间因有利于Zn和Al原子的扩散而促进初生相由枝晶向颗粒状晶演变;预变形促进初生相形貌演变的根本原因在于等温处理时液相沿预变形产生的亚晶界的熔渗。

 

关键字: 固液两相区; 等温处理; 预变形

Effects of pre-deforming and isothermal treatment on structural granular transformation of as-cast ZA27 alloy
XIE Hui, XU Li-jun, YUAN Zhong-yue, ZHENG Hong-xing,  GUO Xue-feng

School of Materials Science and Engineering, Xi′an University of Technology,
Xi′an 710048, P.R.China

Abstract:The effects on transformation of primary phase morphology were studied by using isothermal heat treatment of the as-cast ZA27 ingots in semisolid state. The results show that remelting of dendrite is controlled by atom diffusion in the solid-liquid interface. Increasing isothermal temperature and prolonging isothermal time, which promoted the diffusion of Zn and Al atoms, are helpful to the transformation. Liquefaction along hypo-grain boundaries caused by pre-deforming is the radical reason for the morphological transformation.

 

Key words: semisolid state; pre-deformation; isothermal treatment

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com