机械球磨与反应烧结制备铜铬合金的工艺研究（毕业学术论文设计）.doc

哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学毕业设计（论文） - PAGE II - - PAGE III - 摘要 Cu - Cr系高强高导铜合金是目前广泛应用的高强高导铜基复合材料之一，其主要的特点便是在保持材料高电导率的同时还具有较高的强度。Cu-Cr合金虽然具有良好的应用性能，但Cu-Cr组元的各自特性给Cu-Cr合金的制取带来了较为严重的困难，Cr在Cu中固熔度很低，因此很难用传统的熔炼方法制备Cu-Cr合金，目前制备Cu-Cr合金最普遍的方法是粉末冶金法。为此，本论文研究了机械球磨与反应烧结制备铜铬合金的工艺,观察分析了多个球磨时间段的机械化合金粉末以及高温烧结后的铜铬合金显微组织，通过扫描电镜分析，X射线衍射分析以及金相分析，发现经过机械球磨之后，铬在铜基体中发生了一定程度的固溶，经过烧结之后铬从铜基体中析出，弥散分布在铜基体中形成强化相，改善了合金的机械性能。 关键词　铜铬合金、机械合金化、机械球磨、热压烧结、扫描电镜分析、显微硬度、 Abstract The Cu-Cr alloy of high intensity and conductive rate is one of the composite materials which has been widely used.,its main features is that it has high intensity mean while hasing high conductive rate. Although the Cu–Cr copper alloy has a good application performance, it is hard to make the kind of material for the features of Cu and Cr , because the Solutions degrees Cr in Cu is so little. It is hard to prepare the Cu–Cr copper with the traditional smelting method. Now the most common method to prepare the Cu–Cr copper is powder metallurgy france. Therefore in the paper we made research of the method, mechanical milling and Sinterring which is to prepare the Cu–Cr copper, analysised the mechanized alloy powder of different qiumo time and the micro-organization of the Cu–Cr alloy after high temperature sintering. By means of scanning electron microscope (SEM), X-ray diffraction analysis (XRD) and metallography analysis，we found that Cr dissolved in Cu partly after mechanical milling. And after sinterin Cr Separated out from the copper matrix,dispersible distributed in the copper matrix, which formed strengthening comparing. It improved the mechanical performance of the alloy . Keywords　 Cu-Cr alloy、mechanical alloying、mechanical milling、Sinterin、 SEM、 Micro -hardness 哈尔滨工业大学毕业设计（论文） PAGE II - - - PAGE V - 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc138295854 摘要 PAGEREF _Toc138295854 \h II HYPERLINK \l _Toc138295855 Abstract PAGEREF _Toc138295855 \h III HYPERLINK \l _Toc138295856 第1章 绪论 PAGEREF _Toc138295856 \