摘要
以Ni为粘结相,短切碳纤维(C_(sf))为增强相,采用真空热压烧结技术,在1600℃下制备了含不同C_(sf)量的WC基复合陶瓷刀具材料。研究了C_(sf)的含量对WC基复合陶瓷刀具材料微观组织和力学性能的影响。结果表明:加入C_(sf)后,WC基复合陶瓷刀具材料晶粒明显细化,并随着C_(sf)的增多,WC基复合陶瓷刀具材料的硬度下降,抗弯强度和断裂韧度增大;当C_(sf)含量为0.8wt%时,力学性能良好,此时的抗弯强度为(921.32±24.20)MPa,断裂韧度为(13.01±0.26)MPa·m^(1/2),硬度为(16.92±0.23)GPa。
WC-based composite tool materials were fabricated by using Ni as sintering additive and short carbon fiber as reinforcing phase by vacuum hot-pressing technique sintering at 1600 ℃. The effect of short carbon fiber content on microstructure and mechanical properties of these composites were investigated. The results show that when the C（sf）is added,the grains of the composites are obviously refined, and with the increase of C（sf）content, the hardness decreases, the flexural strength and fracture toughness increase. When the C（sf）content is 0.8wt%, the mechanical properties are good. The flexural strength, fracture toughness and Vickers hardness of the composite are（921.32 ±24.20）MPa,（13.01 ±0.26）MPa·m^1/2 and（16.92±0.23） GPa, respectively.
出处
《热加工工艺》
CSCD
北大核心
2017年第16期108-111,共4页
Hot Working Technology
基金
国家自然科学基金项目(51405326
51575375)
山西省高等学校科技创新项目(2014122)
关键词
WC基陶瓷刀具
短切碳纤维
微观组织
力学性能
WC-based composite ceramic tool
short carbon fiber
microstructure
mechanical properties
