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《Materials for Mechanical Engineering》 2013-01
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Elimination for δ Ferrite in X12CrMoWVNbN10-1-1 Steel

LIU Zhi-xiang,LIU Jian-sheng,HE Wen-wu,ZHAO Xiao-dong(College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)  
After X12CrMoWVNbN10-1-1 steel was heated at high temperature for a long time,a lot of δ ferrites would separated out,which had larger effects on mechanical properties of the steel.Firstly,the original samples were re-treated,and then were heated to 1 000-1 100 ℃ for a long time or was treated with hot upsetting;finally,impact property was tested.The effects of heat treatment and hot upsetting on δ ferrites in tested steels were studied.The results show that heat treatment had not obvious effect on eliminating δ ferrite,and had limited improvement on mechanical properties.δ ferrite eliminated with the happening of recrystallization during hot upsetting,and residual δ ferrite was inversely proportional to effective strain,and mechanical properties of the steel improved obviously,too.
【Fund】: 国家重大科技专项资助项目(2009ZX04014-062);; 太原市大学生创新创业专项资助项目
【CateGory Index】: TG142.15
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