کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7971700 | 1514612 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of hot rolling temperature on the microstructure and mechanical properties of ultra-low carbon medium manganese steel
ترجمه فارسی عنوان
اثر درجه حرارت نورد گرم بر ریزساختار و خواص مکانیکی فولاد منگنز فوق العاده کم کربن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The effect of hot rolling temperature on microstructural evolution and mechanical properties of 0.05C-5Mn (wt%) steel was investigated. With the decrease of hot rolling temperature from 1150â¯Â°C to 900â¯Â°C, the average size of prior austenite grain was decreased from ~ 40â¯Âµm to ~20â¯Âµm, and average width of martensite lath was refined from ~ 400â¯nm to ~ 250â¯nm. The morphology of reversed austenite was changed from film-like shape to block-like shape, and the volume fraction of reversed austenite was increased from 14.75% to 16.28% because of the stimulated nucleation in refined prior austenite grains by rolling at lower temperature. The yield strength, tensile strength and the total elongation were simultaneously increased from 673â¯MPa, 805â¯MPa, and 27.5% to 704â¯MPa, 846â¯MPa, and 31%, respectively. The low temperature impact toughness was significantly enhanced from 133â¯J to 222â¯J at ââ¯40â¯Â°C. The significant improvement in mechanical properties by lower hot rolling temperature were attributed to both the refined tempered martensite lath with higher density of high misorientation grain boundaries and the active TRIP effect of reversed austenite with suitable mechanical stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 731, 25 July 2018, Pages 149-155
Journal: Materials Science and Engineering: A - Volume 731, 25 July 2018, Pages 149-155
نویسندگان
S. Yu, L.X. Du, J. Hu, R.D.K. Misra,