Microstructure, thermal stability and mechanical properties of the novel (W_1−x

详细信息    查看全文

• 作者：Zhuhui Qiao ; Xianfeng Ma ; Wei Zhao ; Huaguo Tang
• 关键词：Novel cemented carbide ; Mechanical alloying ; Hot-pressing sintering ; Microstructure ; Mechanical properties
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2009
• 出版时间：January 2009
• 年：2009
• 卷：27
• 期：1
• 页码：48-51
• 全文大小：361 K

文摘

Bulk novel cemented carbides (W_1−xAl_x)C–10.1 vol % Co (x = 0.2, 0.33, 0.4, 0.5) are prepared by mechanical alloying and hot-pressing sintering. Hot-pressing (HP) is used to fabricate the bulk bodies of the hard alloys. The novel cemented carbides have good mechanical properties compared with WC–Co. The density and operating cost of the novel material is much lower than a WC–Co system. The material is easy to process and the processing leads to nano-scaled, rounded, particles in the bulk material. The hardness of (W_1−xAl_x)C–10.1 vol % Co (x = 0.2, 0.33, 0.4, 0.5) hard material is 20.37, 21.16, 21.59 and 22.16 GPa, and the bending strength is 1257, 1238, 1211 and 1293 MPa, with the aluminum content varying from 20 % to 50 % . The relationship between the microstructure and the mechanical properties of the novel hard alloy is also discussed.