工业黄铜H68的晶界工程处理及晶界特征分布  

A GBE Processing and Grain Boundary Character Distribution of Industry Brass H68

作　　者：姜英[1] 胡柳[1] 郭红[1] 

机构地区：[1]山东理工大学机械工程学院,淄博255049

出　　处：《机械工程材料》2011年第5期4-6,10,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(50771060)

摘　　要：采用电子背散射衍射等技术研究了工业黄铜H68的晶界工程(GBE)处理及晶界特征分布(GBCD)。结果表明:工业黄铜H68经固溶和预处理,再进行6%冷轧并在923 K退火10 min后,其特殊晶界比例达到76%,一般大角晶界包围的∑3n(n=1,2,3)特殊晶粒团尺寸大于300μm,较好地阻断了一般大角晶界网络的连通性,实现了GBCD优化;预处理中非共格∑3晶界的形成及再结晶引起的晶粒细化,为后续冷轧退火中诱发∑3n(n=1,2,3)晶界迁移反应提供了条件,这是H68黄铜发生GBCD优化的主要机制。A grain boundary enginering（GBE） processing and grain boundary character distributions（GBCD） in the industry brass H68 were studied by means of electron back-scattered diffraction,etc.The results show that the H68 brass was subjected to cold rolling 6% followed by annealing at 923 K for 10 min after solid solution and pretreatment,its special boundary percentage of 76% was obtained,and the size of the ∑3 n（n=1,2,3）special particle clusters surrounded by general grain bounderies with high angle was larger than 300 μm.The connectivity of general large angle boundaries networks were interrupted by the special boundaries,and the GBCD optimization was realized.It was found out that the formation of incoherent ∑3 grain boundaries and the grain refinement from recrystallization during pretreatment provided conditions for the induction of migration of ∑3 n（n=1,2,3） grain boundaries during subsequent cold rolled and followed by annealing,which was the main mechanism of GBCD optimization in the brass H68.

关 键 词：H68黄铜 晶界工程处理 晶界特征分布 

分 类 号：TG111.7[金属学及工艺—物理冶金]