Strain Aging Behavior of Microalloyed Low Carbon Seamless Pipeline Steel

被引：8

作者：

Wu, Qianlin ^{[1
]}

Zhang, Zhonghua ^{[2
]}

Liu, Yaoheng ^{[2
]}

机构：

[1] Shanghai Maritime Univ, Coll Ocean Sci & Engn, Shanghai 201306, Peoples R China

[2] Baoshan Iron & Steel Co, Baosteel Res Inst, Shanghai 201900, Peoples R China

来源：

ISIJ INTERNATIONAL | 2016年 / 56卷 / 01期

关键词：

microalloyed low carbon steel; seamless pipe; strain aging; microstructure; mechanical properties; MECHANICAL-PROPERTIES; WELDMENT;

D O I：

10.2355/isijinternational.ISIJINT-2015-521

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Strain aging behavior of microalloyed low carbon seamless pipeline steel with normalized (ferriticpearlitic) and quenched-and-tempered (ferritic-cementitic) microstructures has been investigated in different pre-strains at 250 degrees C. The yield ratios of steels with ferritic-pearlitic microstructure at different pre-strains are significantly higher than that with ferritic-cementitic microstructure. It is attributed that an interaction between particles and dislocation is stronger for quenched-and-tempered steel in comparison with that for normalized steel. Therefore, strain aging resistance of normalized steel is, to a great extent, better than that of quenched-and-tempered steel. Unlike welded pipe, few carbon atoms in supersaturated solid solution diffuse to the mobile dislocations, forming Cottrell atmospheres and producing strain aging phenomenon in seamless pipe. This different is attributed to the different pipe making technique: TMCP (Thermo-Mechanical Control Process) for welded pipe and traditional heat-treatment for seamless pipe.

引用

页码：126 / 131

页数：6

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