2025年01月05日 星期日 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  2023, Vol. 28 Issue (4): 338-346    DOI: 10.19976/j.cnki.43-1448/TF.2023030
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
超声冷冻干燥混粉工艺对WC-6Co-GO/Al2O3硬质合金组织及性能的影响
张振, 苏武丽, 孙兰
四川大学 机械工程学院,成都 610065
Effects of powder mixing process by ultrasonic freeze-drying method on the microstructure and properties of WC-6Co-Go/Al2O3 cemented carbide
ZHANG Zhen, SU Wuli, SUN Lan
School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
全文: PDF (884 KB)   HTML (0 KB) 
输出: BibTeX | EndNote (RIS)      
摘要 分别采用机械球磨法和球磨-超声-冷冻干燥法制备WC-6Co-GO/Al2O3混合粉末,并通过冷压成形-烧结制备块体硬质合金,研究混粉工艺和GO/Al2O3复合粒子含量对混合粉末的分散性以及合金的微观形貌、致密度和力学性能的影响。结果表明:超声-冷冻干燥可以有效地解决GO/Al2O3复合粒子的团聚问题,获得细小均匀的粉末颗粒。采用球磨-超声-冷冻干燥法混粉时,所制备的GO/Al2O3复合粒子质量分数为0.15%的硬质合金中,复合粒子均匀分布在WC晶粒间使细化晶粒的效果较显著,而且合金的相对密度较高,合金的强度提高至2 723.6 MPa,比普通机械球磨的合金提高约600 MPa,硬度(HV30)和断裂韧性分别提高约200.0和1.0 MPa∙m1/2
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
张振
苏武丽
孙兰
关键词 超声-冻干机械球磨氧化石墨烯(GO)纳米氧化铝WC-6Co硬质合金    
Abstract:The mixed powders of WC-6Co-GO/Al2O3 were prepared by mechanical ball milling method and ball milling-ultrasonic-freeze-drying method, respectively, and the bulk cemented carbide was prepared by cold press forming-sintering. The effects of the mixing process and the content of GO/Al2O3 composite particles on the dispersion of the mixed powders and the microscopic morphology, density and mechanical properties of the alloy were studied. The results show that ultrasonic freeze-drying can effectively solve the agglomeration problem of GO/Al2O3 composite particles and obtain fine uniform powder particles. In the prepared cemented carbide with the mass fraction of GO/Al2O3 composite particles of 0.15% when mixing powder by ball milling-ultrasonic- freeze-drying method, the composite particles are uniformly distributed among the WC grains to make the effect of refining the grains more significant, and the relative density of the alloy is higher, and the strength of the alloy increases to 2 723.6 MPa, which is about 600 MPa higher than that of the alloy with ordinary mechanical ball milling, and the hardness (HV30) and toughness also increase by about 200.0 and 1.0 MPa∙m1/2, respectively.
Key wordsultrasonic freeze-drying    mechanical ball milling    graphene oxide (GO)    nano-alumina    WC-6Co comented carbide
收稿日期: 2023-03-28      出版日期: 2023-09-21
ZTFLH:  TG135.5  
通讯作者: 孙兰,副教授,博士。电话:028-85595187;E-mail: sunlan@scu.edu.cn   
引用本文:   
张振, 苏武丽, 孙兰. 超声冷冻干燥混粉工艺对WC-6Co-GO/Al2O3硬质合金组织及性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(4): 338-346.
ZHANG Zhen, SU Wuli, SUN Lan. Effects of powder mixing process by ultrasonic freeze-drying method on the microstructure and properties of WC-6Co-Go/Al2O3 cemented carbide. Materials Science and Engineering of Powder Metallurgy, 2023, 28(4): 338-346.
链接本文:  
http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2023030     或     http://pmbjb.csu.edu.cn/CN/Y2023/V28/I4/338
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