保温时间对微波烧结Ti(C,N)基金属陶瓷刀具材料力学性能的影响  

Effect of Holding Time on Mechanical Properties of Microwave Sintered Ti(C,N)-based Cermet Tool Material

作　　者：李吉遵 高洪玉 刘含莲[1,2] 黄传真[1,4] 王利梅 袁玉兰 Li Jizun;Gao Hongyu;Liu Hanlian;Huang Chuanzhen;Wang Limei;Yuan Yulan(School of Mechanical Engineering,Shandong University,Jinan 250061,China;不详)

机构地区：[1]山东大学机械工程学院,济南市250061 [2]山东大学先进射流工程技术研究中心 [3]中国重汽济南动力有限公司 [4]燕山大学机械工程学院

出　　处：《工具技术》2022年第4期23-27,共5页Tool Engineering

基　　金：国家自然科学基金项目(52075300);山东省自然科学基金重大基础研究项目(ZR2018ZA0401)。

摘　　要：利用微波烧结技术制备了一种新型Ti(C,N)基金属陶瓷刀具材料,主要研究了保温时间对烧结Ti(C,N)-WC-HfN金属陶瓷刀具材料的力学性能影响规律,并结合微观组织对其影响规律进行了分析。研究表明,当保温时间为10min和15min时,Ti(C,N)基金属陶瓷刀具材料的微观组织均匀,晶粒相对细小,致密度较高,力学性能明显优于更长保温时间的金属陶瓷刀具材料;当采用更短的保温时间烧结时,尽管获得的晶粒尺寸较小,但此时致密度不够高,性能较低;在1400℃烧结温度下,保温10min时,材料的组织缺陷最少,综合力学性能较优,其中断裂韧度约为8.19MPa·m^(1/2),优于传统烧结工艺制备的刀具材料,材料的断裂方式为沿晶/穿晶混合断裂模式。本研究对快速烧结制备高性能金属陶瓷刀具材料具有指导意义。A novel kind of Ti(C,N)-based cermet tool material is prepared by microwave sintering.The effect of holding time on the mechanical properties of sintered Ti(C,N)-WC-HfN cermet tool material is mainly studied,and it is analyzed according to the microstructure.The research showes that the material has a homogeneous microstructure,relatively fine grains and high relative density when the holding time is 10 minutes and 15 minutes,and its mechanical properties are much better than those of cermet tool materials with the longer holding time.Although the small grain size can be obtained under shorter holding time,the relative density is not high enough at this time,in the lower mechanical properties.The material has the least microstructure defects and the best comprehensive mechanical properties,when sintered at 1400℃for 10 minutes.The fracture toughness is about 8.19MPa·m^(1/2),which is better than the tool materials prepared by the traditional sintering.The fractured mode of the material is a mixed fracture mode of intergranular and transgranular.This research has guiding significance for the rapid sintering preparation of high-performance cermet tool materials.

关 键 词：保温时间 力学性能 微观组织 微波烧结 TI(C N)基金属陶瓷刀具 

分 类 号：TG711[金属学及工艺—刀具与模具] TQ174.75[化学工程—陶瓷工业]