Characteristics and stability of oxide+carbonitride in H13 steel at 1250℃  

作　　者：Xiao-lin Sun Han-jie Guo Jing Guo Fei Wang Dong Xu Gao-yang Song Shuai Wang 

机构地区：[1]School of Materials Science and Engineering,Hebei University of Engineering,Handan,056038,Hebei,China [2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing,100083,China [3]High Temperature Materials Research Institute,Central Iron and Steel Research Institute Co.,Ltd.,Beijing,100081,China [4]Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Hebei University of Engineering,Handan,056038,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2024年第1期134-142,共9页

基　　金：This work is financially supported by Hebei Natural Science Foundation under Grant Nos.E2020402067,E2018402098,and E2021402056,Open Program of State Key Laboratory of Advanced Metallurgy under Grant No.K1:21-08;Key Project of Handan Scientific Research Program under Grant No.21122015004;the Science and Technology Research and Development Program of Handan City under Grant No.21422101235.The authors would like to express their sincere thanks to Tianjin CISRI-HARDER Materials&Technology Co.,Ltd.for the experiment.

摘　　要：The morphology,size,quantity,and composition of complex oxide+carbonitride in H13 steel held at 1250℃for 5,10,and 15 h were determined.The results show that the ratio and number of complex carbonitrides with cores in H13 steel are gradually increased when holding at 1250℃compared with those in the original H13 steel,and the core size increases.There are one or more oxide cores in(Ti_(x),V_(1-x))(Cy,N_(1-y)),including xCaO·zAl_(2)O_(3),xCaO·yMgO·zAl_(2)O_(3),and CaO after holding at 1250℃,in addition to MgO·Al_(2)O_(3)and Al_(2)O_(3)in the original steel.The equilibrium temperature for(Ti_(x),V_(1-x))(Cy,N_(1-y))precipitation at the solidification front and decomposition in the solid state was theoretically analyzed,which was affected by the x value and the product of Ti and N contents in H13 steel.Meanwhile,the composition of(Ti_(x),V_(1-x))(Cy,N_(1-y))is influenced by the oxide cores.It is convinced that(Ti_(x),V_(1-x))(Cy,N_(1-y))with oxide cores has a higher stability,especially for oxides with a high Al_(2)O_(3)content.Heat treatment at high temperature facilitates a more reasonable analysis of oxide+carbonitride,and the generation mechanism of oxide+carbonitride was discussed.

关 键 词：Complex carbonitride DECOMPOSITION Oxide core CHARACTERISTIC STABILITY 

分 类 号：TG142[一般工业技术—材料科学与工程]