摘要
采用DIQ(两相区形变-保温-淬火)热处理工艺,借助扫描电镜(SEM)及透射电镜(TEM)等测试手段研究了两相区不同变形量对一种含Cu低碳钢组织演变、位错密度和Mn、Cu合金元素配分行为与分布的影响规律。结果表明,对于经历了两相区热模拟压缩变形处理的含Cu低碳钢,随变形量的增加,铁素体和马氏体组织均趋于细化,位错密度逐渐增加,合金元素配分行为先增强后减弱。两相区变形处理的变形量为10%时,Mn、Cu原子的配分效果最好,二者在马氏体中的平均含量较原实验钢分别提高了62.82%和20.73%。
The purpose of the present work was to study a novel heat treatment process,i.e.intercritical deformation-intercritical annealing-quenching(DIQ),for the microstructure improvement of copper-bearing low-carbon steel.The thermal simulation test was conducted and the microscopic observation of SEM and TEM were employed to analyze the microstructure evolution,dislocation density,and Mn,Cu elements partitioning and distribution within the Cu-bearing low-carbon steel specimens experienced the DIQ processes differing in deformation extent.The results indicated that,for the experimental steel processed by simulated DIQ,a larger deformation extent can lead to the refinement of ferrite and martensite,the gradual increase in dislocation density,and the biphasic change(enhanced→attenuated)of the alloy elements partitioning behavior.Through the DIQ treatment with 10%deformation,the best partitioning of Mn and Cu atoms could be achieved,as the average concentration of Mn and Cu within martensite increased by 62.82%and 20.73%,respectively,compared with the original steel specimen.
作者
陈连生
李跃
田亚强
郑小平
魏英立
宋进英
CHEN Liansheng;LI Yue;TIAN Yaqiang;ZHENG Xiaoping;WEI Yingli;SONG Jinying(Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan 063210)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第6期1032-1035,共4页
Materials Reports
基金
国家自然科学基金(51574107)
河北省自然科学基金(E2016209048
E2017209048)
唐山市科技创新团队(15130202C)
河北省研究生创新项目(2017S01)~~
关键词
含铜低碳钢
两相区形变
位错增殖
空位
合金元素配分
copper-bearing low-carbon steel
intercritical deformation
dislocation multiplication
vacancy
alloy elements partitioning
