(1.中國科學院 金屬研究所，沈陽110016；
2.中國科學技術(shù)大學 材料科學與工程學院，合肥230026)
摘 要: 為了研究銅管材游動芯頭拉拔成形過程中組織結(jié)構(gòu)及力學性能變化規(guī)律，采用OM和EBSD等試驗方法對不同拉拔變形量的TP2管材進行分析。結(jié)果表明：經(jīng)過拉拔變形后，晶粒沿著拉拔方向伸長形成纖維組織，管材顯微硬度增加且軸向硬度值較高；經(jīng)過第三道次拉拔變形量達到75%，晶粒沿軸向長度為80~100 μm，寬度為8~10 μm；經(jīng)過拉拔變形，管材內(nèi)部織構(gòu)發(fā)生轉(zhuǎn)變，隨著變形量的提高，由原始軋制態(tài){001}á110？、{111}á110？織構(gòu)逐漸發(fā)生轉(zhuǎn)動，經(jīng)過三個道次后變?yōu)閧110}á100？、{110}á111？織構(gòu)。
關(guān)鍵字: 銅管拉拔；織構(gòu)轉(zhuǎn)變；顯微組織；EBSD
（1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China）
Abstract:In order to study the changes of microstructure and mechanical properties of copper tubes during floating plug drawing process, OM and EBSD methods were used to analyze the tube with different drawing deformations. The results show that the grains were elongated along the drawing direction and form fibrous tissue after drawing, the micro-hardness of tube increases and is higher along the transverse than that along the longitudinal; after the third pass deformation amount to 75%, the grain sizes are 80-100 μm in length and 8-10 μm in width. With the deformation increasing, the type of texture transforms from {001}á110？ and {111}á110？ texture, which is formed in original rolling, into {110}á100？ and {110}á111？ texture.
Key words: tube drawing; texture transform; microstructure; EBSD method
