摘要
利用光学显微镜、X射线衍射仪和EBSD研究了初次再结晶退火温度对低温Hi-B钢组织、织构和晶界特征的影响。结果表明,初次再结晶退火温度直接影响低温Hi-B钢的初次再结晶的组织均匀性和晶粒平均尺寸,随着退火温度的提高,初次再结晶组织的晶粒平均尺寸从15.2μm增加到26.7μm,820℃退火的初次再结晶组织均匀性最好。初次再结晶主要织构类型为γ织构、α织构、{001}<120>织构和{114}<481>织构,退火温度880℃时,{001}<120>织构强度明显增加。随着退火温度的提高,Goss晶粒数量减少,{114}<481>组分的面积分数先减少后增加,而{111}<112>组分的面积分数在退火温度升高到840℃后开始减少。退火温度为800℃时,{110}<001>取向晶粒与相邻晶粒的取向差为20°~45°的比例最高,为89.2%。不同退火温度下,{110}<001>取向晶粒周围的CSL晶界分布情况变化很大。
Effect of annealing temperature of primary recrystallization on the microstructure,texture and grain boundary characteristics of low-temperature Hi-B steel was studied by means of metallographic microscope,X-ray diffractometer and EBSD.The results show that the annealing temperature of the primary recrystallization directly affects the microstructure uniformity and the average grain size of the low-temperature Hi-B steel.With the increase of annealing temperature,the average grain size of the primary recrystallization structure increases from 15.2 μm to 26.7 μm,the primary recrystallization microstructure has the best uniformity after annealing at 820 ℃.The main texture types of primary recrystallization are:γ texture,α texture,{001}120 texture and {114}481 texture.When the annealing temperature rises to 880 ℃,the texture strength of {001}120 increases obviously.With the increase of annealing temperature,the number of Goss grains decreases,area fraction of {114}481 first decreases and then increases,while area fraction of {111}112 begins to decrease after the annealing temperature rises to 840 ℃.When the annealing temperature is 800 ℃,the proportion of misorientation 20°-45° angle between {110}001 grains and adjacent grains is the highest,which is 89.2%.The distribution of CSL grain boundaries around {110}001 grains varies at different annealing temperatures.
作者
刘磊
郭飞虎
时朋召
乔家龙
仇圣桃
Liu Lei;Guo Feihu;Shi Pengzhao;Qiao Jialong;Qiu Shengtao(Engineering and Research Center for Continuous Casting Technology,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;School of Metallurgy,Northeastern University,Shenyang Liaoning 110819,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第7期8-14,共7页
Heat Treatment of Metals
基金
国家重点研发计划(2016YFB0300305)。
关键词
退火温度
Hi-B钢
初次再结晶
组织
织构
annealing temperature
Hi-B steel
primary recrystallization
microstructure
texture
