摘要
目的细化β-γTiAl合金的显微组织。方法通过水冷铜坩埚熔炼制备纳米SiC颗粒添加的TiAl合金,合金成分为Ti-43Al-2Mo-0.4SiC,并对其进行热处理实验。研究SiC颗粒对晶粒细化情况,以及Mo元素对合金凝固路径的影响。结果炉冷条件下,合金显微组织为全片层组织,空冷或水冷条件,合金将保留高温β相,说明Mo元素的加入扩大了β相相区。结论 SiC颗粒的添加可以有效细化晶粒。
The paper aims to further refine the microstructure ofβ-γTiAl alloy.SiC alloy with SiC particles was prepared with water-cooling copper crucible.Ti-43Al-2Mo-0.4SiC was the component of the alloy.It suffered heat treated to study refinement of SiC particle and influence of Mo on the solidifying path.In furnace cooling,the microstructure of the alloy was full lamellar.While high temperatureβphase was preserved by air cooling or water quenching.The alloying with Mo strongly enlargedβphase field.Therefore,the adding of SiC particles could refine the grain dramatically.
作者
李桂
陈闯
张聪惠
韩建超
张长江
张树志
LI Gui;CHEN Chuang;ZHANG Cong-hui;HAN Jian-chao;ZHANG Chang-jiang;ZHANG Shu-zhi(School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 71005, China;Baotai Group Co., Ltd., Baoji 721014, China;School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;College of Materials Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
出处
《精密成形工程》
2018年第2期82-85,共4页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(51604191)
