高强钢板拉伸断口分层缺陷成因的探讨  

Discussion on Causes of Delamination Defect at Tensile Fracture of High Strength Steel Plate

作　　者：孙雪娇 王学娜 王彦国 张婷 曹静 

机构地区：[1]莱钢集团银山型钢有限公司,山东莱芜271104 [2]山东莱钢建设有限公司,山东莱芜271104

出　　处：《山东冶金》2016年第6期53-55,61,共4页Shandong Metallurgy

摘　　要：针对高强度钢Q690D60-80mm规格拉伸试验后试样断门出现分层的现象，利用金相显微镜、扫描电子显微镜及能谱仪对典型断口分层试样和断门合格试样进行试验分析。显微组织、断口形貌以及分层附近区域检测分析表明，该种分层与组织形貌和中心偏析无关，主要是小尺寸夹杂物和气泡的共同作用在厚度方向上对基体产生分割而造成的。In order to solute the problems of tension fracture delamination of the Q690D high-strength steel plate with 60-80 mm thickness, samples with typical layered fracture and regular fracture were observed with optical microscopy, scanning electron microscopy and energy disperse spectroscopy. The research of microstructure, fracture appearance and area near the dclamination shows that the defect has nothing to do with microstructure and center segregation but is mainly related to subsize inclusions and bubbles, which function together segmented the base material in the thickness direction.

关 键 词：Q690D高强度钢板 拉伸断口 分层 夹杂物 气泡 

分 类 号：TG142.1[一般工业技术—材料科学与工程]