Investigation on decomposition behavior of austenite under continuous cooling in vanadium microalloyed steel (30MSV6)

被引：20

作者：

Azghandi, Seyed Hadi Mohamadi ^{[1
]}

Ahmadabadi, Vahide Ghanooni ^{[1
]}

Raoofian, Iman ^{[1
]}

Fazeli, Fateh ^{[1
]}

Zare, Mansour ^{[1
]}

Zabett, Ahad ^{[1
]}

Reihani, Hamed ^{[1
]}

机构：

[1] Ferdowsi Univ Mashhad, Dept Met & Mat Engn, Fac Engn, Mashhad 916771111, Iran

来源：

MATERIALS & DESIGN | 2015年 / 88卷

关键词：

Microalloyed steel; Austenite decomposition; Modeling; CCT; Hardness; ACICULAR FERRITE; DILATOMETRIC ANALYSIS; TRANSFORMATION; CARBON; MICROSTRUCTURE; MODEL; PARAMETERS; MECHANISM;

D O I：

10.1016/j.matdes.2015.09.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present study, investigations are focused on microstructural evolution and the resulting hardness during continuous cooling transformation (CCT) in a commercial vanadium microalloyed steel (30MSV6). Furthermore, the effects of cooling rate and austenite grain size (AGS) on CCT behavior of the steel have been studied by employing high-resolution dilatometry. Quantitative metallography accompanied with scanning electron microscopy (SEM) has efficiently confirmed the dilatometric measurements of transformation kinetics and austenite decomposition products. A semi-empirical model has been proposed for prediction of microstructural development during austenite decomposition of the steel and the resultant hardness. The model consists of 8 sub-models including ferrite transformation start temperature, ferrite growth, pearlite start temperature, pearlite growth, bainite start temperature, bainite growth, martensite start temperature and hardness. The transformed fractions of ferrite, pearlite and bainite have been described using semi-empirical Johnson-Mehl-Avrami-Kolmogorov (JMAK) approach in combination with Schell's equation of additivity. The JMAK rate parameter for bainite has been formulated using a diffusion-controlled model. Predictions of the proposed model were found to be in close agreement with the experimental measurements. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：751 / 758

页数：8

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