NiAl-Cr(Mo)和NiAl-Cr(Mo)-4Fe共晶合金组织的高温稳定性研究  

High Temperature Stability of Microstructure of NiAl-Cr(Mo) and NiAl-Cr(Mo)-4Fe Eutectic Alloys

作　　者：吕永飞 康胜峰 王雷 LYU Yongfei;KANG Shengfeng;WANG Lei(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《铸造技术》2022年第5期357-361,共5页Foundry Technology

基　　金：国家自然科学基金项目(51501147);陕西省重点研发计划(2022GY-389)。

摘　　要：将Ni Al-Cr(Mo)和Ni Al-Cr(Mo)-4Fe两种共晶合金分别在1 100℃和1 200℃下进行热处理,并通过OM、SEM和SEM-EDS对比研究了组织的高温稳定性。结果表明,1 100℃以上热处理后,共晶枝晶中心的Cr(Mo)层片被夹断,形成相应的间隔。随着温度和时间的增加,间隔的数量和长度逐渐增加,组织的高温稳定性变差。Fe的添加也在一定程度上降低了其高温稳定性。Ni Al-Cr(Mo) and Ni Al-Cr(Mo)-4Fe eutectic alloys were heat treated at 1 100 ℃ and 1 200 ℃, respectively, and their high temperature stability was studied by OM, SEM and SEM-EDS. The results show that the Cr(Mo) layer in the center of eutectic dendrite is clipped and the corresponding gap is formed after heat treatment above 1 100 ℃. With the increase of temperature and time, the number and length of interstitial space gradually increase, and the high-temperature stability of the microstructure becomes worse. The addition of Fe also reduces its high temperature stability to a certain extent.

关 键 词：共晶合金 高温稳定性 热处理 

分 类 号：TG132.3[一般工业技术—材料科学与工程]