Flexible manufacturing technology of controlling exact bake hardening value in continuous galvanizing line  

作　　者：Xiao-fei Zheng Yong-lin Kang Bao-yong Wang Zhi-gang Han Xin-Iong Luo 

机构地区：[1]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Shougang Jingtang Iron and Steel United Co.,Ltd., Tangshan 063200,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2018年第12期1296-1302,共7页

基　　金：the financial support by National Natural Science Foundation of China (Grant No. U1460101).

摘　　要：Flexible manufacturing technology for ultra-low-carbon bake hardening (BH)steels with different solute carbon contents in the range of (6-16)× 10^-4 wt.%was systematically studied.The effects of soaking temperature,cooling rate and aging time on solute carbon content were explored.The bake hardening value in a continuous galvanizing line with an over-aging section was investigated.Optimal manufacturing parameters were calculated using the design of experiment to obtain the best and most flexible process parameters.Results indicate a relationship among carbon content,soaking temperature and cooling rate.When solute carbon is 9 × 10^-6,cooling rate is 50 ℃/s,the soaking temperature is 745 ℃,and BH value is 45 MPa,the requirements of an automobile factory can be met.

关 键 词：BAKE HARDENING VALUE SOLUTE carbon content Aging time SOAKING temperature Cooling rate 

分 类 号：TF[冶金工程]