Effect of alloying elements on Z-direction property of high strength low alloy H-beam steels

被引：0

作者：

Li, Hu ^{[1
,3
]}

Wang, Zuo-Cheng ^{[1
,3
]}

Xue, Chang-Shen ^{[1
,3
]}

Zhuang, Dong-Dong ^{[1
,3
]}

Wang, Xiao ^{[1
,3
]}

Zhang, Si-Xun ^{[2
]}

机构：

[1] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China

[2] Laiwu Iron and Steel Company Ltd, Laiwu 271104, China

[3] School of Materials Science and Engineering, Shandong University, Jinan 250061, China

来源：

Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | 2013年 / 34卷 / 02期

关键词：

Tensile testing - Grain boundaries - Laminating - Cracks - High strength alloys - Alloying - Refining;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To study the effect of alloying elements, Nb, B and Ni, on lamination crack resistant property (Z-direction property) of high strength low alloy H-beam steels, contrast experiment was designed. Microstructure, composition and mechanical properties, especially the Z-direction property of the experimental steels were investigated by means of SEM, XRD, TEM, EDS analysis and tensile test. The results indicate that the microalloy elements of Nb, B and small amount of Ni do harm to the lamination crack resistant property, and the experiment steel of Q345E, which contains Nb, B, Ni and lower inclusions, exhibits lower Z-direction property after ladle refining than the steel of Q345B, which does not contain Nb, B, Ni and does not experience the refining process. Mechanism of this phenomenon is mainly ascribed to the effect of Nb, B and Ni on obstruction of dislocations at grain boundaries and inside grains.

引用

页码：52 / 56

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