Q460C钢板微观组织对拉伸断口特征的影响  

Effect of microstructure on tensile fracture characteristics of Q460C steel plate

作　　者：冯锐[1] 李胜利[1] 冯勇[2] 孙卫华[2] 

机构地区：[1]山东大学材料科学与工程学院,山东济南250061 [2]济钢集团技术中心,山东济南250101

出　　处：《金属热处理》2012年第1期21-24,共4页Heat Treatment of Metals

摘　　要：用SEM和EDS等手段研究了Q460C钢板微观组织和拉伸断口的特征。结果表明,具有铁素体和珠光体、晶粒尺寸相对均匀的Q460C钢板伸长率较高;有带状贝氏体和铁素体混晶组织的钢板伸长率明显降低。带状贝氏体和混晶组织是导致钢板产生木纹状分层断口的主要原因,出现木纹状分层断口的Q460C钢板伸长率较低。The microstructure and tensile fracture characteristics of Q460C steel plate were studied with scanning electron microscope and energy disperse spectroscopy,etc.The results show that the ferrite-pearlite Q460C plate with relatively uniform grain size has higher elongation,while the plate with banded bainite and ferrite mixed grain structure has obviously lower elongation.The banded bainite and mixed grain structure are the main cause of wooden pattern layered fracture,and the emergence of this kind fracture can lead to a fall in elongation of Q460C plate.

关 键 词：Q460C钢 木纹状分层断口 中心偏析 带状贝氏体 混晶 

分 类 号：TG142.1[一般工业技术—材料科学与工程]