无钴Ti(C,N)基金属陶瓷与3Cr2W8V钢的热疲劳行为差异  

THERMAL FATIGUE BEHAVIOR OF COBALT-FREE Ti(C,N) BASED CERMET AND 3Cr2W8V STEEL

作　　者：周凤云[1] 熊惟皓[1] 胡镇华[1] 崔崑[1] 

机构地区：[1]华中理工大学模具技术国家重点实验室,武汉430074

出　　处：《理化检验（物理分册）》1998年第10期3-6,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家自然科学基金资助项目59571027;湖北省自然科学基金资助项目96J029

摘　　要：采用热疲劳龟裂网纹模拟法,定性地研究了无钴Ti(C,N)基金陶瓷与3Cr2W8V钢的热疲劳行为差异.结果表明,在相同周次的热循环下,前者热疲劳裂纹呈粗大交叉的直线,起源于试样棱边的尖角处,并以较快的速度进入失稳扩展;后者形成细小典型的龟裂网纹,扩展缓慢,显示出热疲劳抗力高于前者.The thermal fatigue behavior of Ti(C,N) based cermet and 3Cr2W8V steel were studied by thermal fatigue cracking simulation test. The results showed that cracks in the cobalt-free Ti(C,N) based cermet originated from tip angle of the specimen surface, these cracks are straight and propagate rapidly. For the 3Cr2W8V steel, fine cracking net were formed after thermal fatigue test, and the crack propagate slowly.

关 键 词：金属陶瓷 热疲劳 裂纹 TI(C N) 合金钢 

分 类 号：TQ174.758[化学工程—陶瓷工业] TG142.33[化学工程—硅酸盐工业]