2025年08月13日 星期三 首页   |   期刊介绍   |   编 委 会   |   投稿指南   |   出版法规   |   出版伦理   |   期刊订阅   |   联系我们   |   留言板   |   广告合作   |   ENGLISH
粉末冶金材料科学与工程  2022, Vol. 27 Issue (5): 478-487    DOI: 10.19976/j.cnki.43-1448/TF.2022024
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
选区激光熔融制备Cu-Cr-Nb-Ce合金组织与性能的高温稳定性
艾永康, 刘祖铭, 张亚洲, 叶书鹏, 李建
中南大学 粉末冶金国家重点实验室,长沙 410083
High-temperature stability of microstructure and properties of Cu-Cr-Nb-Ce alloy fabricated by selective laser melting
AI Yongkang, LIU Zuming, ZHANG Yazhou, YE Shupeng, LI jian
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
全文: PDF (1096 KB)   HTML (0 KB) 
输出: BibTeX | EndNote (RIS)      
摘要 采用选区激光熔融(selective laser melting, SLM)法制备Cu-Cr-Nb-Ce合金,通过对合金进行1 000 ℃高温热处理,研究Cu-Cr-Nb-Ce合金显微组织、力学性能和导电性能的高温稳定性。结果表明,在SLM成形件的XY面(垂直于建造方向),基体组织由熔池道中心的长柱状晶和沿熔池道边界分布的细小等轴晶组成,两者交错分布,平均晶粒尺寸为28.3 μm,第二相为在基体中弥散分布的纳米级Cr2Nb相。SLM成形件经1 000 ℃高温热处理10、50和100 h后,晶粒的整体形貌无明显变化,但平均晶粒尺寸分别增加8.5%、18.7%和27.2%;Cr2Nb相的平均尺寸从29.5 nm分别长大到348.6、524.9和589.4 nm,最大尺寸达1~3 μm,并且在晶界分布更密集;合金的维氏硬度(HV)明显下降,从126分别降至84、79和75。经10 h热处理,电导率从18.5%IACS显著提高到54.6%IACS,延长热处理时间,则电导率不再明显提高。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
艾永康
刘祖铭
张亚洲
叶书鹏
李建
关键词 Cu-Cr-Nb-Ce合金选区激光熔融显微组织高温稳定性性能    
Abstract:Cu-Cr-Nb-Ce alloy was fabricated by selective laser melting (SLM). The high-temperature stability of microstructure, mechanical properity and electrical conductivity of Cu-Cr-Nb-Ce alloy was studied by high-temperature heat treatment at 1 000 ℃. The results show that the matrix mocrostructure of the XY plane (perpendicular to the build direction) of the as-SLMed Cu-Cr-Nb-Ce alloy is composed of long columnar grains in the center of the molten pool and fine equiaxed grains distributed along the boundary of the molten pool. The two kinds of grains are staggered and the average grain size is 28.3 μm. The second phase are the nanoscale Cr2Nb phases dispersed in the matrix. After heat treatment at 1 000 ℃ for 10, 50 and 100 h, the overall morphology of the grains does not change obviously, but the grains grow and the average size of grain increases by 8.5%, 18.7% and 27.2%, respectively; The average size Cr2Nb phase grows from 29.5 nm to 348.6 nm, 524.9 nm and 589.4 nm respectively, and the maximum size reaches 1-3 μm. In addition, Cr2Nb phases in heat-treated specimens are more densely along the grain boundary. The hardness (HV) of the alloy decreases significantly from 126 to 84, 79 and 75 respectively; while the electrical conductivity increases significantly from 18.5%IACS to 54.6%IACS after heat treatment for 10 h, whereas no significant progress is observed with extension of the heat treatment time.
Key wordsCu-Cr-Nb-Ce alloy    selective laser melting (SLM)    microstructure    high-temperature stability    properties
收稿日期: 2022-03-14      出版日期: 2022-11-15
ZTFLH:  TG146.1  
基金资助:国家重点研发计划资助项目(2021YFB3701100);金属材料磨损控制与成型技术国家地方联合工程研究中心开放基金资助项目
通讯作者: 刘祖铭,教授,博士。电话:0731-88879422;E-mail: lzm@csu.edu.cn   
引用本文:   
艾永康, 刘祖铭, 张亚洲, 叶书鹏, 李建. 选区激光熔融制备Cu-Cr-Nb-Ce合金组织与性能的高温稳定性[J]. 粉末冶金材料科学与工程, 2022, 27(5): 478-487.
AI Yongkang, LIU Zuming, ZHANG Yazhou, YE Shupeng, LI jian. High-temperature stability of microstructure and properties of Cu-Cr-Nb-Ce alloy fabricated by selective laser melting. Materials Science and Engineering of Powder Metallurgy, 2022, 27(5): 478-487.
链接本文:  
http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2022024     或     http://pmbjb.csu.edu.cn/CN/Y2022/V27/I5/478
版权所有 © 《粉末冶金材料科学与工程》编辑部
地址:长沙市麓山南路中南大学粉末冶金研究院 邮编:410083 电话:0731-88877163 邮箱:pmbjb@csu.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn