Effect of Cr and Its Adding Method on Microstructure and Properties of WC-9wt%Ni Cemented Carbides

摘要：

　　The aim of this work was to evaluate the effect of Cr and its adding mode on microstructure mechanical properties and corrosion resistance of a series of WC-9wt%Ni cemented carbides.The WC-9wt%Ni alloys were prepared by ball milling method and low pressure sintering.The microstructure and properties of the alloys were then investigated using scanning electron microscope,mechanical property tester and immersion corrosion tests.It has been demonstrated that Cr additions can refine the WC grains,decrease the strength of WC-9wt%Ni cemented carbides,and increase the hardness and immersion corrosion resistant (in tap water) properties of the base alloys.Furthermore,the adding method of Cr shows a significant influence on the WC-9wt%Ni-2.3wt%Cr alloys microstructure and properties.Alloys with Cr added in the form of chromium carbide (Cr3C2) characterized by carburizing and shows a relative high strength and lower hardness.While the addition of pure Cr resulted in the formation of (W,Cr)C solid solution phases in WC-9wt%Ni-2.3wt%Cr cemented carbide and enable the alloys exhibit a higher immersion corrosion resistance in tap water.

关键词： cemented carbides Cr adding method microstructure properties

作者: Shi Kaihua Zhou Kechao Xu Shangzhi Min Zhaoyu Zan Xiuqi

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Zi Gong Cem State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China Zi Gong Cemented Carbide Corporation Limited,Zigong 643011,China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 137-143

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）