کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973180 | 1514625 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure, precipitation and mechanical properties of a titanium-tungsten alloyed hot rolled high strength steel
ترجمه فارسی عنوان
ریزساختار، بارش و خواص مکانیکی فولاد ضد زنگ داغ آلیاژ تیتانیوم تنگستن
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کلمات کلیدی
میکروالئون، بارش، تیتانیوم، تنگستن، ساز و کار تقویت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
A new titanium-tungsten-bearing hot rolled high strength bainitic steel was developed through the design of chemical composition and rolling processing. The chemical composition of 0.04C-0.1Ti-0.4W (wt%) was determined to make full use of alloying elements through considering the atomic ratio of elements. The rolling condition in the region through austenite recrystallization to austenite non-recrystallization region was adopted to realize a homogenous and fine microstructure. The effects of coiling temperature (CT) on the microstructure, precipitation and mechanical properties of the steel were investigated. Results showed that the average effective grain sizes of bainite ferrite were measured to be 2.2â¯Âµm, 1.8â¯Âµm and 2.4â¯Âµm for the sample of CTs 550â¯Â°C, 600â¯Â°C and 650â¯Â°C, respectively. The precipitates formed during coiling process were identified as nanoscale NaCl-type (TiW)C carbides that contain a high level of Ti and W. As CT increases, the precipitation amount of nanoscale precipitate increases. At the CT of 600â¯Â°C, an optimal combination of strength and ductility was achieved (yield strength: 733â¯MPa; ultimate tensile strength: 806â¯MPa; uniform elongation: 14.9%; total elongation: 24.4%). In addition, due to re-precipitation of nanoscale carbides, the strength of the steels coiled at 600â¯Â°C was obviously increased after tempering at 650â¯Â°C for 15 à 103 s holding, exhibiting superior ageing strengthening effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 56-63
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 56-63
نویسندگان
Zhenqiang Wang, Yuhang Sun, Yanyuan Zhou, Zhigang Yang, Fengchun Jiang,