机械合金化和放电等离子体烧结技术制备Fe-(8/15)Cr合金及其微观结构分析  

Microstructure characterization of Fe-(8/15)Cr alloy fabricated by mechanical alloying and spark plasma sintering

作　　者：靳忠伟 黄依娜 吴玉程[2,3,4] 罗来马 卫勇[2] JIN Zhong-wei;HUANG Yi-na;WU Yu-cheng;LUO Lai-ma;WEI Yong(School of Electronic Science&Applied Physics,Hefei University of Technology,Hefei 230601,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Nationale Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei 230009,China;Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230601 [2]合肥工业大学材料科学与工程学院,安徽合肥230009 [3]有色金属与加工技术国家地方联合工程研究中心,安徽合肥230009 [4]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《材料热处理学报》2020年第12期72-79,共8页Transactions of Materials and Heat Treatment

基　　金：合肥工业大学人才引进启动项目基金。

摘　　要：研究了机械合金化过程中球磨时间对Fe-(8/15)Cr粉末微观结构的影响。采用放电等离子烧结(SPS)技术制备了Fe-(8/15)Cr的烧结样品,分析了球磨时间对Fe-(8/15)Cr烧结样品组织及性能的影响。结果表明,随着球磨时间的增加,Fe-(8/15)Cr粉末的平均晶粒尺寸逐渐减小,烧结样品的维氏硬度逐渐增加,Cr元素原有的晶体结构被破坏并逐渐固溶到Fe基体中。在球磨时间为40 h时,Fe-(8/15)Cr粉末的平均晶粒尺寸和烧结样品的维氏硬度不再发生明显变化,各合金元素在粉末内部分布均匀。烧结样品中晶粒呈双峰分布,随着球磨时间的增加,大晶粒减少,细晶粒增多。The effect of mechanical alloying time on microstructure of Fe-(8/15)Cr powders were investigated.The Fe-(8/15)Cr sintered samples were prepared by spark plasma sintering(SPS),and the effect of mechanical alloying time on microstructure and properties of the Fe-(8/15)Cr sintered samples were analyzed.The results show that with the increase of the milling time,the average grain size of the Fe-(8/15)Cr powder gradually decreases,the Vickers hardness of the SPS sintered sample gradually increases,and the originalcrystal structure of Cr element is destroyed and gradually dissolved into the Fe matrix.After milling for 40 h,the average grain size of the Fe-(8/15)Cr powders and the Vickers hardness of the SPS sintered samples no longer change significantly,and each alloying elements are uniformly distributed inside the powder.The grains in the SPS sintered samples show a bimodal distribution.With the increase of the milling time,the amount of the large grains decreases while the amount of the fine grains increases.

关 键 词：FE-CR合金 机械合金化 放电等离子烧结 微观结构 

分 类 号：TG142.7[一般工业技术—材料科学与工程]