Abnormal Trend of Ferrite Hardening in a Medium-Si Ferrite-Martensite Dual Phase Steel

被引:3
|
作者
Khajesarvi, Ali [1 ]
Banadkouki, Seyyed Sadegh Ghasemi [1 ]
Sajjadi, Seyed Abdolkarim [2 ]
Somani, Mahesh C. [3 ]
机构
[1] Yazd Univ, Min Technol Res Ctr, Dept Min & Met Engn, Yazd, Iran
[2] Ferdowsi Univ Mashhad, Dept Mat Sci & Engn, Mashhad, Iran
[3] Univ Oulu, Ctr Adv Steels Res, Mat & Mech Engn, Oulu 90014, Finland
基金
芬兰科学院;
关键词
medium Si low alloy steel; step-quenched heat treatment; ferrite-martensite; ferrite-pearlite DP microstructure; alloying element partitioning; ferrite hardening variation; TENSILE PROPERTIES; VOLUME FRACTION; BEHAVIOR; TRANSFORMATION; DEFORMATION; MORPHOLOGY;
D O I
10.3390/met13030542
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, the effects of carbon, Si, Cr and Mn partitioning on ferrite hardening were studied in detail using a medium Si low alloy grade of 35CHGSA steel under ferrite-martensite/ferrite-pearlite dual-phase (DP) condition. The experimental results illustrated that an abnormal trend of ferrite hardening had occurred with the progress of ferrite formation. At first, the ferrite microhardness decreased with increasing volume fraction of ferrite, thereby reaching the minimum value for a moderate ferrite formation, and then it surprisingly increased with subsequent increase in ferrite volume fraction. Beside a considerable influence of martensitic phase transformation induced residual compressive stresses within ferrite, these results were further rationalized in respect of the extent of carbon, Si, Cr and Mn partitioning between ferrite and prior austenite (martensite) microphases leading to the solid solution hardening effects of these elements on ferrite.
引用
收藏
页数:16
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