Microstructure and Properties of Gradient Cemented Carbide with Nano-TiN  被引量:2

Microstructure and Properties of Gradient Cemented Carbide with Nano-TiN

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作  者:杨天恩 SUN Lan 熊计 GUO Zhixing ZHENG Xiaoming 

机构地区:[1]School of Manufacturing Science and Engineering, Sichuan University

出  处:《Journal of Wuhan University of Technology(Materials Science)》2014年第1期102-108,共7页武汉理工大学学报(材料科学英文版)

基  金:Funded by Research Funds for the Central Universities(No.2011SCU11038);Chengdu Science and Technology Project(Nos.10GGZD080GX-268 and 11DXYB096JH-027)

摘  要:Gradient cemented carbides with nano-TiN were prepared by the common powder metallurgical procedure. The formation of gradient zone and the microstructure, properties of the alloys were investigated using scanning electron microscope(SEM), energy dispersive spectroscopy(EDS) and other performance testing apparatus. Moreover, the effect of nano-TiN on the gradient cemented carbide was studied. It is found that gradient zone width increases slightly with nano-TiN introduction. Both cobalt and titanium concentrations reach the maximum near the gradient border. Tungsten concentration shows fluctuation from the surface to the bulk. (Ti ,W)C phase grains are refined for nitrogen introduction. Core-rim structure has been observed under the SEM back-scattered mode. The core appears as dark due to more titanium in it and the rim with more tungsten appears as grey. In addition, the hardness and transverse rupture strength of gradient cemented carbide are enhanced with nano-TiN introduced.Gradient cemented carbides with nano-TiN were prepared by the common powder metallurgical procedure. The formation of gradient zone and the microstructure, properties of the alloys were investigated using scanning electron microscope(SEM), energy dispersive spectroscopy(EDS) and other performance testing apparatus. Moreover, the effect of nano-TiN on the gradient cemented carbide was studied. It is found that gradient zone width increases slightly with nano-TiN introduction. Both cobalt and titanium concentrations reach the maximum near the gradient border. Tungsten concentration shows fluctuation from the surface to the bulk. (Ti ,W)C phase grains are refined for nitrogen introduction. Core-rim structure has been observed under the SEM back-scattered mode. The core appears as dark due to more titanium in it and the rim with more tungsten appears as grey. In addition, the hardness and transverse rupture strength of gradient cemented carbide are enhanced with nano-TiN introduced.

关 键 词:gradient cemented carbide cubic phase nano-TiN core-rim structure 

分 类 号:TB383.1[一般工业技术—材料科学与工程]

 

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