کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1629654 | 1006154 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Refinement of Steel Austenite Grain Under an Extremely High Degree of Superheating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
There thermal cycles for the cyclic heat treatment of a bainitic steel were simulated under the different heating rate ranged from 2°C/s to 100°C/s and 1000°C/s followed by subsequent rapid cooling using a Gleeble3500 thermal-mechanical simulator equipped with the self-designed quench system. The microstructural change of the starting material imposed by the different thermal cycles was observed by optical and transmission electron microscope (TEM). The results indicate that a high degree of superheating for the reverse bainitic αâγ transformation was realized as a result of extremely rapid heating (1000°C/s) up to an elevated austenitisation temperature (1250°C), which prevent restoration of the initial coarse-grained austenite and lead to a significant refinement of austenite grain. An ultrafine-grained structure with enhanced mechanical properties then formed during the subsequent rapid γâα reaction on cooling. The results indicate a novel microstructure refinement route for the bainitic steels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Iron and Steel Research, International - Volume 14, Issue 5, Supplement 1, September 2007, Pages 161-166
Journal: Journal of Iron and Steel Research, International - Volume 14, Issue 5, Supplement 1, September 2007, Pages 161-166
نویسندگان
WANG Q.F., ZHANG C.Y., XU W.W., ZHAO S.J., ZHAO X.Q., YAN Z.S.,