风力发电塔筒用钢Q345FTE/F的正火热处理试验  

Research on Normalizing Process of Q345FTE/F Steel for Wind Power Generation Tower

作　　者：范巍[1] 童明伟[1] 张开广[1] 孔君华[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《山东冶金》2015年第1期31-33,共3页Shandong Metallurgy

摘　　要：对采用真空感应炉冶炼,Nb、V、Ti、Ni单一或组合微合金化,控轧控冷工艺开发的风电塔筒用钢Q345FT进行正火处理,试验钢屈服强度均不低于360 MPa,抗拉强度在500 MPa以上,除Ti+Ni系钢的伸长率在27%,其余均在30%以上,符合技术指标要求;除Ti系钢在-60℃冲击功值低外,其余冲击功值均在100 J以上,并且Ti系钢、Ti+Ni系钢、Nb+Ti系钢经正火后,冲击功下降均较为明显,Nb、Nb+Ni、V+Ni系钢冲击功变化不大。应适当下调含Ti系列钢正火温度。Q345FTE/F used in wind turbine tower were produced by controlled rolling and controlled cooling technology with single or combination of Nb, V, Ti and Ni in vacuum induction furnace. After normalizing, the yield strength and tensile strength of the steel is more than 360 MPa and higher than 500 MPa respectively. The elongation of test steel is above 30% except Ti＋Ni series steel（ that has the elongation 27%）, they all can meet the technical requirements. The impact energy values of Ti series steel at -60 ℃ is less than 100 J. After normalizing, the impact energy values of Ti, Ti＋Ni and Nb＋Ti series steel decreased significantly, however, that of Nb, Nb＋Ni and V＋Ni series steels almost unchanged. The normalizing temperature is slighdy higher for Ti series steel which cause austenite grain coarsening, and the impact energy values decreased. It is necessary to reduce the normalizing temperature.

关 键 词：风力发电塔筒用钢 Q345TE/F 正火 力学性能 组织 

分 类 号：TG162.83[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]