公开(公告)号：US20190100833A1

公开(公告)日：2019-04-04

申请号：US16136768

申请日：2018-09-20

申请人： NOVA Chemicals Corporation ,  Kubota Corporation ,  Kubota Materials Canada Corporation

发明人： Vasily Simanzhenkov ,  Hany Farag ,  Leslie Benum ,  Billy Santos ,  Kathleen Donnelly ,  Nobuyuki Sakamoto ,  Kunihide Hashimoto ,  Michael Gyorffy

IPC分类号： C23C8/18 ,  C23C8/02 ,  C21D1/72 ,  C22C30/00 ,  C22C19/05

摘要： A substrate steel of the comprising from 0.01 to 0.60 wt. % of La, from 0.0 to 0.65 wt. % of Ce; from 0.06 to 1.8 wt. % of Nb up to 2.5 wt. % of one or more trace elements and carbon and silicon may be treated in an oxidizing atmosphere to product a coke resistant surface coating of MnCr2O4 having a thickness up to 5 microns.