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Effect of Intercritical Annealing Parameters on Dual Phase Behavior of Commercial Low-Alloyed Steels
作者姓名:Aydin Hüseyin  Kazdal Zeytin Havva  Kubilay Ceylan
作者单位:TUBiTAK Marmara Research Center (MAM), Materials Institute, Gebze 41400, Kocaeli, Turkey
基金项目:Item Sponsored by Prime Ministry State Planning Organization of Turkey(5045003)
摘    要: It is known that dual phase (DP) heat treatments and alloying elements have a strong effect on martensitic transformations and mechanical properties. In the present work, the effects of some intercritical annealing parameters (heating rate, soaking temperature, soaking time, and quench media) on the microstructure and mechanical properties of cold rolled DP steel were studied. The microstructure of specimens quenched after each annealing stage, was analyzed using optical microscopy. The tensile properties, determined for specimens submitted to complete annealing cycles, are influenced by the volume fractions of multi phases (originated from martensite, bainite and retained austenite), which depend on annealing processing parameters. The results obtained showed that the yield strength (YS) and the ultimate tensile strength (UTS) increase with the increasing intercritical temperature and cooling rate. This can be explained by higher martensite volume ratio with the increased volume fraction of austenite formed at the higher temperatures and cooling rates. The experimental data also showed that, for the annealing cycles carried out, higher UTS values than ~ 800 MPa could be obtained with the S3 steel grade.

关 键 词:退火效应  双相钢  性能参数  低合金  残余奥氏体  商业  浸泡温度  淬火介质
收稿时间:2008-12-25

Effect of Intercritical Annealing Parameters on Dual Phase Behavior of Commercial Low-Alloyed Steels
Aydin Hüseyin,Kazdal Zeytin Havva,Kubilay Ceylan.Effect of Intercritical Annealing Parameters on Dual Phase Behavior of Commercial Low-Alloyed Steels[J].Journal of Iron and Steel Research,2010,17(4):0-73.
Authors:Aydin Hüseyin  Kazdal Zeytin Havva  Kubilay Ceylan
Affiliation:TUBÍTAK Marmara Research Center (MAM), Materials Institute, Gebze 41400, Kocaeli, Turkey
Abstract:It is known that dual phase (DP) heat treatments and alloying elements have a strong effect on martensitic transformations and mechanical properties. In the present work, the effects of some intercritical annealing parameters (heating rate, soaking temperature, soaking time, and quench media) on the microstructure and mechanical properties of cold rolled DP steel were studied. The microstructure of specimens quenched after each annealing stage, was analyzed using optical microscopy. The tensile properties, determined for specimens submitted to complete annealing cycles, are influenced by the volume fractions of multi phases (originated from martensite, bainite and retained austenite), which depend on annealing processing parameters. The results obtained showed that the yield strength (YS) and the ultimate tensile strength (UTS) increase with the increasing intercritical temperature and cooling rate. This can be explained by higher martensite volume ratio with the increased volume fraction of austenite formed at the higher temperatures and cooling rates. The experimental data also showed that, for the annealing cycles carried out, higher UTS values than ~ 800 MPa could be obtained with the S3 steel grade.
Keywords:Automotive  Carbon / Alloy Steels  Mechanical Testing  Metallography  Heat Treating
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