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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
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- DOI:
- 作者:
- 李书文1，张兰亭1，韩 旭2，杨泽宇1，李军志3，郑巧玲1，李烨飞1
LI Shuwen1, ZHANG Lanting1, HAN Xu2, YANG Zeyu1, LI Junzhi3, ZHENG Qiaoling1, LI Yefei1
- 作者单位:
- 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
1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2. School of Energy and Power Engineering, Xi 'an Jiaotong University, Xi 'an 710049, China; 3. China Railway Baoji Bridge Group Co., Ltd., Baoji 721006, China
- 关键词:
- Ti(C, N)；烧结温度；升温速率；组织变化；力学性能
Ti(C, N); sintering temperature; heating rate; microstructure change; mechanical properties
- 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，1 300 ℃和1 350 ℃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，1 450 ℃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 1 300 ℃ and 1 350 ℃.The average diameter of hard phase particles increases gradually, and the hardness reaches the peak value of HRA 86.3 at 1 450 ℃. 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.