Hot ductility behavior of 800MPa Ultra High Strength Niobium Containing Steels

被引：1

作者：

Li, Qingshan ^{[1
]}

Zhang, Mei ^{[1
]}

Huang, Chaobin ^{[1
]}

Wu, Ruyi ^{[1
]}

Zhao, Xue ^{[1
]}

Zhong, Yong ^{[2
]}

Li, Lin ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat, Shanghai 200072, Peoples R China

[2] State Key Lab Dev & Applicat Tech Automot Steel, Baosteel Grp, Shanghai 201900, Peoples R China

来源：

MATERIAL DESIGN, PROCESSING AND APPLICATIONS, PARTS 1-4 | 2013年 / 690-693卷

关键词：

800MPa High Strength Steel; Continuous casting slabs; hot ductility; brittle zone; TRANSVERSE CRACKING; MICROALLOYED STEELS; PRECIPITATION;

D O I：

10.4028/www.scientific.net/AMR.690-693.227

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot ductility behavior of 800MPa ultra high strength niobium containing steels has been investigated with Gleeble3500 hot simulator. Tensile test was carried out at 650 degrees C-1300 degrees C at a constant true strain rate of 0.001 s(-1). Experimental results showed that steel A has quite well ductility, and the brittle zone is narrow. Due to pro-eutectoid ferrite film formation along the prior austenite grain boundary at 650 degrees C-750 degrees C, samples showed a loss of hot ductility, and the fracture morphology of the specimens was brittle intercrystalline fracture, indicating the third brittle zone of the steel. However, the third brittle zone can be avoided during continuous casting, if the temperature of straightening could be kept over 800 degrees C.

引用

页码：227 / +

页数：3

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