The influence of heat treatment on δ ferrite transformation for austenitic stainless steel billet 00Cr24Ni13

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• 作者：SHU Wei
• 会议时间：2013-06-01
• 关键词：δ ferrite ; austenitic stainless steel ; heat treatment ; phase change
• 作者单位：State Key Laboratory of Advanced Stainless Steels,Taiyuan Iron & Steel(Group) Co.,Ltd.,Taiyuan 030003,Shanxi,China
• 母体文献：第五届宝钢学术年会论文集
• 会议名称：第五届宝钢学术年会
• 会议地点：上海
• 主办单位：中国金属学会
• 语种：chi

摘要

The effects of heat treatment on δ ferrite transformation for austenitic stainless steel billet 00Cr24Ni13 have been investigated.The result shows that the continuous mesh δ ferrite in the billet will disconnect and grow up as the heating temperature increased.Prolonging the holding time will mainly affect the disconnection degree of the reticular δ ferrite.Air cooling will induce the δ ferrite which grows up in the high temperature to transform to the granular δ ferrite with the small size.After air cooling from 1 200℃ for 3 h,continuous reticular δ ferrite has completely transformed into dispersed granular δ ferrite with the size less than 10 μm,and δ phase proportion has decreased from 14.3 % to 7.3%.Relative to the granular ferrite,phase interface of reticular ferrite is easier to crack during rolling process.