Partial austenitisation and TBF steel composed of ferrite, bainitic ferrite, and austenite

被引：2

作者：

Erisir, Ersoy ^{[1
]}

Bilir, Oguz Gurkan ^{[1
]}

Sozer, Yunus Emre ^{[2
]}

Ararat, Ozge ^{[1
]}

Davut, Kemal ^{[3
]}

机构：

[1] Kocaeli Univ, Dept Met & Mat Engn, Kocaeli, Turkey

[2] Erdemir, Eregli Demir & Celik Fabrikalari TAS, Zonguldak, Turkey

[3] Izmir Inst Technol, Mat Sci & Engn Dept, Urla Izmir, Turkey

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2023年 / 39卷 / 01期

关键词：

TBF steels; partial austenitisation; phase transformations; microstructural characterisation; mechanical properties; MECHANICAL-PROPERTIES; STRENGTH; MICROSTRUCTURE; MARTENSITE; FORMABILITY; DUCTILITY; EBSD; NB; ALUMINUM;

D O I：

10.1080/02670836.2022.2102289

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A TRIP-aided bainitic-ferritic (TBF) steel with a chemical composition of Fe-0.19C-1.7Mn-1.09Si-0.51Al-0.05Nb (wt-%) was partially austenitised from a hot-rolled martensitic initial microstructure. After the hot rolling, the martensitic specimens were reheated to different intercritical temperatures and then austempered at 350 degrees C. Thus, the effect of the initial microstructure of TBF steel on intercritical austenite formation during partial austenitisation was studied. The microstructures were investigated by scanning electron microscopy and electron backscatter diffraction (EBSD), and the tensile properties were tested. Microstructural observations revealed that a final microstructure of fine ferrite, bainitic ferrite, and retained austenite can be obtained. The steel partial austenitised at 770 degrees C showed a good combination of ultimate tensile strength and total elongation.

引用

页码：105 / 116

页数：12

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