2Cr-1Mo钢热处理特性及其强韧化机制  

HEAT-TREATMENT FEATURES AND STRENGTHENINGAND TOUGHENING MECHANISM IN STEEL

作　　者：刘正东 吴光大 张光中 

出　　处：《钢铁研究学报》1994年第S1期25-31,共7页Journal of Iron and Steel Research

摘　　要：本文采用光学显微镜、扫描电镜、透射电镜和定量金相等试验手段，主要研究了Ｃｒ－１Ｍｏ钢正火处理后显微组织对钢强韧性的影响。在奥氏体化处理后冷却过程中（１００～１℃／ｍｉｎ），共得到四种显微组织─—粒状贝氏体，细珠光体，典型的片层状珠光体和先析铁素体，该钢先析铁素体临界冷速约为６０℃／ｍｉｎ，冷速高于６０℃／ｍｉｎ获得的组织为完全粒状贝氏体组织。试验结果表明，显微组织的类型及其含量的变化是造成Ｃｒ－１Ｍｏ钢强韧性能变化的主要原因。By optical microscopy,SEM,TEM and quantitative metallograpraphy,thispaper mainly studied the effect of microstructure on the strength and toughness ofnormalized steel . During normalization(CR=1～100℃/min),granularbainite,fine pearlite,typical lamellar pearlite and proeutectoid ferrite formed .The criti-cal cooling rate for proeutectoid ferrite formation in this steel was about 60℃/min,and fully granular bainite Was obtained when cooling rate was over 60℃/min,It wasthe changes in type of microstructure and its content that determined the change instrength and toughness of steel.

关 键 词：粒状贝氏体 奥氏体化处理 强韧化 片层状珠光体 显微组织 Cr-1Mo钢 珠光体组织 析铁 铁素体组织 冷速 

分 类 号：TG142.33[一般工业技术—材料科学与工程]