圆钢表面裂纹产生原因的遗传性试验研究  

Experimental Research on Surface Crack Reasons of Round Steel

作　　者：姜碧涛[1] 闫卫兵[1] 林腾昌[2] 

机构地区：[1]河北钢铁集团宣钢公司,河北宣化075100 [2]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《工业加热》2015年第4期34-35,46,共3页Industrial Heating

摘　　要：采用在铸坯表面钻孔的方法模拟铸坯划伤和针孔对圆钢表面裂纹的遗传性影响,运用金相检测、SEM等方法对工业试验样品进行了分析。结果表明,随着钻孔直径的增加,圆钢裂纹深度和长度都增加;随钻孔深度的增加,裂纹深度增加,而裂纹长度变化不明显。试验表明铸坯表面划伤和表面针孔是导致圆钢表面裂纹主要原因。Genetic influence of scratches and pinhole of slab on round steel surface crack was studied by drilling on slab surface, and industrial test samples analysed by methods of metallographic test and SEM. The results showed that depth and length of round steel crack increased with the increase of hole diameter. When drilling depth increasing, the crack depth incresed, but crack length change is not obvious, tests showed that the main reason of round steel surface crack is slab surface scratches and surface pinhole.

关 键 词：圆钢 表面裂纹 划伤 针孔 

分 类 号：TF777.2[冶金工程—钢铁冶金]