首页|Characteristics and stability of oxide+carbonitride in H13 steel at 1250 ℃
Characteristics and stability of oxide+carbonitride in H13 steel at 1250 ℃
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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(Tix,V1-x)(Cy,N1-y),including xCaO·zAl2O3,xCaO·yMgO·zAl2O3,and CaO after holding at 1250 ℃,in addition to MgO·Al2O3 and Al2O3 in the original steel.The equilibrium temperature for(Tix,V1-x)(Cy,N1-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(Tix,V1-x)(Cy,N1-y)is influenced by the oxide cores.It is convinced that(Tix,V1-x)(Cy,N1-y)with oxide cores has a higher stability,especially for oxides with a high Al2O3 content.Heat treatment at high temperature facilitates a more reasonable analysis of oxide+carbonitride,and the generation mechanism of oxide+carbonitride was discussed.
Xiao-lin Sun、Han-jie Guo、Jing Guo、Fei Wang、Dong Xu、Gao-yang Song、Shuai Wang
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School of Materials Science and Engineering,Hebei University of Engineering,Handan 056038,Hebei,China
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China
High Temperature Materials Research Institute,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China
Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Hebei University of Engineering,Handan 056038,Hebei,China
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Hebei Natural Science FoundationHebei Natural Science FoundationHebei Natural Science FoundationOpen Program of State Key Laboratory of Advanced MetallurgyKey Project of Handan Scientific Research ProgramScience and Technology Research and Development Program of Handan City
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