摘要
通过扫描电镜和能谱分析仪对含Ti螺纹钢筋的纵向裂纹缺陷进行分析,发现螺纹钢筋纵向裂纹的位置集中在肋部与非肋部,且均沿纵向方向呈连续直线分布;在裂纹上出现了不连续的翘皮缺陷,翘皮底部与基体相连。经EDS分析表明,裂纹中间层主要是铁的氧化物,说明该缺陷是在高温轧制过程形成的。结合工艺参数、设备状况分析产生纵向裂纹缺陷的主要原因是坯料自身所带的裂纹,经过轧制并未愈合,并沿轧制方向发生扩展;而翘皮缺陷主要由于在轧制前几道次出现耳子或过充满现象。
The longitudinal cracks of a screw-thread steel with Ti addition were analyzed by SEM and EDS.The cracks locate at both of the rib and the non-rib positions,showing continuous and linear distribution along the longitudinal direction.Discontinuous warping defects were found on the cracks,and the bottoms of the warps are connected with the substrate with clear edges.According to the EDS results,the intermediate layer of the cracks is mainly consisted of iron oxide,indicating that the cracks formed in the high temperature rolling process.Based on the applied process parameters and equipment conditions,it is concluded that the longitudinal cracks mainly originated from the initial cracks in the blank,which were not healed by the rolling and extended along the rolling direction.The warping defects were caused by the earring or overfilling occurred in the previous rolling passes.
作者
戚桓
庞启航
李维娟
崔娟
郭菁
阮士朋
QI Huan;PANG Qihang;LI Weijuan;CUI Juan;GUO Jing;RUAN Shipeng(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Xingtai Iron&Steel Corp.,Ltd.,Xingtai 054027,China;Hebei Engineering Research Center for Wire Rod,Xingtai 054027,China)
出处
《辽宁科技大学学报》
CAS
2019年第6期415-419,425,共6页
Journal of University of Science and Technology Liaoning
基金
国家自然科学基金(U1860112)。
关键词
螺纹钢筋
纵向裂纹
翘皮缺陷
析出物
screw-thread steel
longitudinal crack
defect of warping
precipitates
作者简介
戚桓(1995-),男,辽宁鞍山人;通讯作者:庞启航(1986-),男,辽宁本溪人,讲师。
