کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
830837 1470361 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and study of high-strength low-Mo fire-resistant steel
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Development and study of high-strength low-Mo fire-resistant steel
چکیده انگلیسی

Microstructures and properties of hot-rolled fire-resistant steels with two Mo addition levels (about 0.15 and 0.3 wt.%) have been investigated. The results show that a low-Mo (about 0.15 wt.%) fire-resistant steel with high strength (ultimate tensile strength: 770.3 MPa, yield strength: 488.7 MPa) and low yield ratio (0.634) has been successfully developed by microalloying Nb, V, and Ti and controlling cooling rate in combination. It is possible to obtain two-thirds of room-temperature yield strength at 600 °C in high-strength low-Mo (about 0.15 wt.%) fire-resistant steel. The analysis indicates that the bainite strengthening and precipitation strengthening are both important in improving the high-temperature strength of fire-resistant steel, and these strengthening effects effectively replace the strengthening effects of Mo. The present results also show that two different components in bainitic microstructure, discontinuous cementites or retained austenite, have similar effects on high-temperature strength of fire-resistant steel.


► A high-strength low-cost fire-resistant steel has been successfully developed.
► Bainite and precipitation strengthening are both important in improving strength.
► Bainite and precipitation strengthening effectively replace Mo strengthening.
► Different bainitic microstructures have similar effects on high-temperature strength.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design (1980-2015) - Volume 36, April 2012, Pages 227–232
نویسندگان
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