INFLUENCE OF TEMPERING TEMPERATURE ON THE SECOND PHASE PRECIPITATION AND PROPERTIES OF X60 PIPELINE STEEL

摘要：

　　The paper studied the influence of tempering temperature(580℃-700℃)on the microstructures and properties of X60 pipeline steel,and focused on precipitation of the second phases containing Nb.The corresponding results revealed that the yield strength,strain hardening exponent and absorbed energy is improved,along with increasing of tempering temperature.However,HV10 decreased firstly and then increased with increase in the tempering temperature; HV10 reached its minimum at the tempering temperature of 640℃.The characterization of the microstructures showed that precipitation behavior of the second phases containing Nb should be correlated with the change in the mechanical properties.When tempering processing at higher temperatures,there were a large number of precipitates composed of Nb and Ti by microstructure examination of TEM,which could increase the strength of the steel due to precipitation strengthening.

关键词： Tempering temperature Second phase precipitation X60 Mechanical properties

作者: Zailong Liu Yuxiu Bian Yanfeng Zhao

作者单位: Technology center of TISCO,Taiyuan Iron and Steel(Group)Co.Ltd.,Taiyuan,China,030003

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 737-742

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）