Influence of normalizing process on the banded structure in the 22Si2MnCrNi2MoA drill steel

摘要：

　　The influence of normalizing process on the banded structure in the 22Si2MnCrNi2MoA drill steel was studied by means of optical microscope,SEM (scanning electron microscope) and EDS (energy dispersive spectroscopy).Besides,the banded structure of the steel was discussed.The results indicate that the level and the composition homogeneity of the banded structure in the rolled materials could be slightly improved by the normalizing process,and the optimal normalizing process is at 920℃ for 20 h on the whole.Furthermore,the banded structure is caused by the segregation of alloy elements as Si,Mn,Cr,Ni and Mo.Finally,microstructure homogenization can be enhanced by improving the cross section deformation uniformity of bars.However,homogeneous distribution control of the alloy elements in the metallurgical process is the critical way to reduce or eliminate the composition inhomogeneity of the banded structure.

关键词： drill steel 22Si2MnCrNi2MoA normalizing process banded structure

作者: ZHU Hong-wu LIU Ya-zheng ZHOU Le-yu WANG Lei-ying HUANG Bin

作者单位: School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100 Xining Special Steel Co.,Ltd.,Xining 810005,Qinghai,China

会议类型: 国际会议

会议名称: Asia Steel International conference 2012(第五届亚洲钢铁大会)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2012-09-23（万方平台首次上网日期，不代表论文的发表时间）