烧结温度和升温速率对Ti(C,N)-304不锈钢金属陶瓷组织与性能的影响  

Effects of Sintering Temperature and Heating Rate on Microstructure and Mechanical Properties of Ti(C,N)-304 Stainless Steel Metal Cermet

作　　者：李书文 张兰亭 韩旭 杨泽宇 李军志[3] 郑巧玲[1] 李烨飞[1] LI Shuwen;ZHANG Lanting;HAN Xu;YANG Zeyu;LI Junzhi;ZHENG Qiaoling;LI Yefei(State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China;School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;China Railway Baoji Bridge Group Co.,Ltd.,Baoji 721006,China)

机构地区：[1]西安交通大学金属强度国家重点实验室,材料科学与工程学院,陕西西安710049 [2]西安交通大学能源与动力工程学院,陕西西安710049 [3]中铁宝桥集团有限公司,陕西宝鸡721006

出　　处：《铸造技术》2022年第6期427-432,共6页Foundry Technology

基　　金：国家重点研发计划(2021YFB3701204);广东省重点领域研发计划(2019B010942001);陕西省自然科学基础研究计划(2022JQ-532,2021JM-011);河南科技大学金属材料磨损控制与成型技术国家地方联合工程研究中心开放课题重点项目(HKDNM202103)。

摘　　要：采用传统粉末冶金和无压烧结工艺制备了Ti(C,N)-304不锈钢金属陶瓷。借助TM3000型台式扫描电子显微镜分析了金属陶瓷组织,基于体视学原理分析了硬质相颗粒大小、硬质相邻接度和黏结相自由程,测定了致密度和硬度。研究了烧结温度和升温速率对Ti(C,N)-304不锈钢金属陶瓷的组织和性能的影响。结果表明,随着烧结温度的增加,金属陶瓷致密度逐渐增加,1300℃和1350℃不能使金属陶瓷致密化;金属陶瓷硬质相颗粒平均直径逐渐增加,1450℃时硬度达到峰值,为HRA 86.3;硬质相邻接度逐渐下降,黏结相自由程逐渐增加,硬质相颗粒分散均匀;低升温速率得到的金属陶瓷性能更优。Ti(C,N)-304 stainless steel metal cermets were prepared by traditional powder metallurgy and pressureless sintering.The microstructure of metal cermet was analyzed by means of scanning electron microscope,the particle size of hard phase,the bonding degree of hard adjacent phase and the free path of bond phase were analyzed based on stereological principle,and the density and hardness were measured.The effects of sintering temperature and heating rate on the microstructure and properties of Ti(C,N)-304 stainless steel cermets were studied.The results show that the density of cermets increases with the increase of sintering temperature,and cermets cannot be densified at 1300℃ and 1350℃.The average diameter of hard phase particles increases gradually,and the hardness reaches the peak value of HRA 86.3 at 1450℃.The adjacent bonding degree of hard phase decreases gradually,the free path of bonding phase increases gradually,and the hard phase particles are evenly dispersed.The properties of cermets obtained at lower heating rate are better.

关 键 词：Ti(C N) 烧结温度 升温速率 组织变化 力学性能 

分 类 号：TF124[冶金工程—粉末冶金]