Softening kinetics in Nb-microalloyed TRIP steels with increased Mn content

被引：23
|
作者：
Grajcar, Adam [1 ]
Kuziak, Roman [2 ]
机构：
[1] Silesian Tech Univ, Inst Engn Mat & Biomat, Ul Konarskiego 18A, PL-44100 Gliwice, Poland
[2] Inst Ferrous Metallurgy, PL-44100 Gliwice, Poland
来源：
ADVANCED MANUFACTURING TECHNOLOGY, PTS 1-3 | 2011年 / 314-316卷
关键词：
TRIP steel; dynamic recrystallization; static recrystallization; dynamic recovery; compression test; softening kinetics; manganese steel; Nb microalloying; HOT DEFORMATION; MICROSTRUCTURES;
D O I：
10.4028/www.scientific.net/AMR.314-316.119
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two 5Mn-1.5Al TRIP steels with and without Nb microaddition were developed in the present study. The steels contain bainite, martensite, interlath retained austenite and martensite-austenite islands. The paper presents the results of the compression tests carried out at various temperatures using the Gleeble simulator. To analyze the kinetics of static recrystallization in these steels, a softening kinetics were determined in a double-hit compression test. It was found that the dynamic recovery is a main thermally activated process occurring during hot deformation. The Nb microalloyed steel has higher flow stresses and peak strains than the Nb-free steel. A solute drag effect of Nb results in a slower softening kinetics of Nb containing steel. The effects of Mn on the retardation of Nb(C,N) precipitation and hot deformation characteristics are also discussed.
引用
收藏
页码：119 / +
页数：2
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