WC/Co硬质合金界面特征分布
Interface character distributions in WC/Co cemented carbide
余顺仕 1陈松 2李广慧 2李辉 3林燕 2李泓枫 1代思远 1武体真 3王卫国2
作者信息
- 1. 福建理工大学 晶界工程研究所,福州 350118
- 2. 福建理工大学 晶界工程研究所,福州 350118;福建理工大学 材料科学与工程学院,福州 350118
- 3. 济南市冶金科学研究所有限责任公司,济南 250022
- 折叠
摘要
利用电子背散射衍射、五参数分析、重叠极图迹线分析和近重位点阵分析等方法研究不同热处理状态WC/Co硬质合金中的WC/WC晶界与WC/Co相界等界面特征分布.结果表明:经高温烧结后油淬的样品,生成了比例为4.5%的WC/WC Σ2晶界,具有{10-10}/{10-10}界面匹配特征的Σ2晶界的比例约为2.6%;该样品中的Co主要为面心立方结构,具有{10-10}WC/{001}Co,{10-10}WC/{110}Co和{11-20}WC/{110}Co等界面匹配特征的界面是WC/Co相界的主要部分.经800℃回火后气氛保护随炉缓冷的样品,其WC/WC Σ2晶界比例及特征与油淬样品十分接近;该样品中的Co主要为六方结构,具有{10-10}WC/{10-10}Co和{11-20}WC/{11-20}Co等界面匹配特征的界面是WC/Co相界的主要部分.
Abstract
Electron backscatter diffraction,five parameter analysis,overlap-pole-figure analysis and near coincident site analysis were used to investigate the interface character distributions of WC/WC grain boundaries and WC/Co phase boundaries in WC/Co cemented carbides under different heat treatment states.The results show that the WC/WC Σ2 grain boundaries with a fraction of 4.5%are generated in the oil-quenched sample after high temperature sintering.The fraction of Σ2 boundaries with interface matching features of{10-10}/{10-10}is 2.6%.The cobalt in this sample is basically face-centered-cubic structure,and the interface with the interface inter-connection features of{10-10}WC/{001}Co,{10-10}WC/{110}Co and{11-20}WC/{110}Co is the main part of the WC/Co phase boundary.After tempering at 800℃,the samples with atmosphere protection and slow cooling in the furnace have the proportion and characteristics of WC/WC Σ2 grain boundaries,which are very close to those of oil-quenched samples.The cobalt in this sample is primarily hexagonal structure,and the interface with the interface inter-connection features of{10-10}WC/{10-10}Co and{11-20}WC/{11-20}Co is the main part of the WC/Co phase boundary.
关键词
WC/Co硬质合金/电子背散射衍射/界面特征分布/晶界界面匹配Key words
WC/Co cemented carbide/electron backscatter diffraction/interface character distribution/grain boundary inter-connection引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据