项目名称： 高硅含量高温钛合金粉末热锻制备及硅化物析出状态对力学行为的影响

项目编号： No.51504072

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 邹黎明

作者单位： 广东省材料与加工研究所

项目金额： 22万元

中文摘要： 为了提高高硅含量Ti-Al-Si-Zr系高温钛合金的综合力学性能，本项目提出将等离子雾化制粉技术与粉末锻造加工相结合，先等离子雾化制备出高品质钛合金粉末，通过机械模压和真空烧结制备出烧结胚。后续采用等温锻造进行加工，制备出具有优异综合力学性能的粉末钛合金。主要研究内容为：研究等离子雾化制粉过程中工艺参数对粉末的物化性能、相组成和组织结构的影响规律；研究制得钛合金粉末的物化性能差异对最终粉末钛合金力学性能的影响关系；研究烧结胚热锻过程中，工艺参数对钛合金致密度、组织结构和力学性能的影响规律；重点研究硅化物的析出状态对钛合金力学性能的影响。本项目的顺利完成将形成一种此类高温钛合金的新的加工方法，并拓展此类钛合金的应用范围，具有重要的科学意义与广泛的应用前景。

中文关键词： 高温钛合金；等离子雾化；粉末锻造；硅化物；力学性能

英文摘要： In order to enhance the mechanical properties of Ti-Al-Si-Zr system high temperature alloy with high Si content, a technology combining plasma atomization with powder forging will be used to prepare powder alloy.Firstly the high quality Ti alloy powder will be prepared by plasma atomization. Then powder Ti alloy will be prepared by mechanical molding and vacuum sintering.Finally the sample will be processed by isothermal forging to achieve high mechnical properties.The main research contents include follows: Studying the effect law of atomization process parameters on physical and chemical properties, microstructure of powder. Studying the effect mechanism of physical and chemical properties from powder on mechnical properties of Ti alloy. Studying the effect law of forging process parameters on density,microstructure and mechanical properties. Focusing on studying the effect mechanism of silicide precipitates on mechnical properties of powder Ti alloy.Successful completion of this project will develop a new method for preparing such kind of high temperature Ti alloy and extend its application range.Hence, the project has important scientific meanings and wide application prospects.

英文关键词： high temperature Ti alloy;plasma atomization;powder forging;silicide;mechanical properties