慢走丝线切割加工对Ti(C,N)基金属陶瓷抗弯强度的影响  

Effect of Low-speed Wire Cut Electrical Discharge Machining on the Bending Strength of Ti(C,N)-based Cermet

作　　者：曾守富 王晓灵[2] 易健宏[1] ZENG Shou-fu;WANG Xiao-ling;YI Jian-hong(Powder Metallurgy Research Institute, Central South University, Changsha 410083, China;Chengdu Branch, Zigong Cemented Carbide Corp. , Ltd, Chengdu 610100, China)

机构地区：[1]中南大学粉末冶金研究院,湖南长沙410083 [2]自贡硬质合金有限责任公司成都分公司,四川成都610100

出　　处：《稀有金属与硬质合金》2018年第2期42-48,共7页Rare Metals and Cemented Carbides

摘　　要：采用液压万能试验机研究了慢走丝线切割加工对Ti(C,N)基金属陶瓷——Ti(C,N)-7%WC-20%Ni-7%Mo的抗弯强度影响。采用SEM、EDS对切割表面形貌和成分,以及变质层的显微组织进行了观察和分析。结果表明,慢走丝线切割加工造成了明显的电蚀变质层,显著降低了试样的抗弯强度,增大了强度散差。变质层的组织中存在大量微裂纹、孔洞、晶粒脱落等显微缺陷。The effect of low-speed wire cut electrical discharge machining （WEDM-LS） on the bending strength of Ti（C,N）-based cermet of Ti（C,N）-7%WC -20%Ni-7%Mo was studied by hydraulic universal testing machine. The morphology and chemical composition of the machining surface, and the microstruc- ture of the deterioration layer were observed and analyzed by SEM and EDS. The results show that WEDM -LS causes obvious electrical erosion deterioration layer, significantly reducing the bending strength and increasing the intensity dispersion of the sample. There are a large number of microscopic defects such as micro-cracks,holes and grain shedding in microstructure of the deterioration layer.

关 键 词：慢走丝线切割 Ti(C N)基金属陶瓷 抗弯强度 变质层 磨削 

分 类 号：TF125.31[冶金工程—粉末冶金]