钢中过热断口遗传性的SEM研究  

SEM INVESTIGATION ON FRACTURE HEREDITY IN OVERHEATED STEEL

作　　者：张帆[1] 康沫狂[1] 

机构地区：[1]西北工业大学

出　　处：《钢铁》1990年第9期51-55,共5页Iron and Steel

摘　　要：将断口遗传分为宏观断口遗传及微观断口遗传两个方面。借助扫描电镜详细研究了过热断口的遗传性及机制。研究表明,微观断口是否遗传取决于预先过热断口的稳定性,对不稳定过热断口,再次热处理后虽然宏观断口产生遗传,但微观断口遗传程度很弱,属“伪遗传断口”;而对稳定过热断口,则宏观及微观均产生严重遗传,属真正的遗传断口。最后对断口遗传机制进行了分析。Fracture heredity(FH)is classified into two different concepts in this paper,namely“Ma-cro-FH”and“Micro-FH”.The phenomenon and mechanism of“Micro-FH”are closely studiedby means of SEM.The results show that“Micro-FH”is dependant on stability of overheatedfracture.In case of unstable overheated fracture although“Macro-FH”emerges after heat trea-tment,the degrce of“Micro-FH”is very weak and this kind of phenomenon can be called“Fa-lse-FH”.In case of stable overheated fracture,both“Macro-FH”and“Micro-FH”phonomenaemerge,that is“True-FH”.Finaly,the mechanism of FH is analyzed.

关 键 词：钢 断口遗传 SEM 

分 类 号：TG142.15[一般工业技术—材料科学与工程]