摘要
采用热型连续铸造方法，选择不同的工艺参数制备直径为3mm的铜线材。用光学显微镜观察线材晶粒形成及生长进程。结果表明：在一定的牵引速度条件下，纯铜线材晶粒生长的特征是从引晶开始阶段的等轴多晶体渐渐演化为柱状多晶体，最终形成单晶体；当牵引速度增大时多晶体演化成单晶体的距离也随之增长；直径为3mm铜线材演化成单晶体的距离在30～80mm内。经X射线分析和透射电镜分析能够确定：铜单晶线材晶体择优生长方向为[100]。
Copper wires with diameter of 3. 0 mm was produced by O. C. C method in different conditions. Grain formation and growth evolution of the wires was observed with optical microscope. The results indicate that the characteristic of copper wire＇s crystal formation and growth is that grade crystals gradually evolve into pillar crystal during the early stage, then single crystal is formed. As the casting speed is increased, the distance of multi-crystals evolution into single crystal also increase. In addition, the distance of crystals for finishing the process of crystal evolution is in the range of 30-80 mm. The preferable growth direction of copper single crystal is （100）.
出处
《铸造技术》
EI
CAS
北大核心
2006年第1期11-14,共4页
Foundry Technology
基金
兵科院预研项目420010800304的资助
关键词
热型连铸
铜单晶线材
晶粒演化
Hot-mould continues casting
Copper single crystal wire
Crystal evolution
