Experimental Verification of a Critical Condition for the Formation of As-Cast Coarse Columnar Austenite Grain Structure in a Hyperperitectic Carbon Steel

被引：4

作者：

Ohno, Munekazu ^{[1
]}

Maruyama, Masato ^{[2
]}

Matsuura, Kiyotaka ^{[1
]}

机构：

[1] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Univ, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2015年 / 46A卷 / 11期

关键词：

HOT-DUCTILITY; PERITECTIC REACTION; GAMMA-GRAIN; SIZE; TRANSFORMATION; GROWTH; MICROSTRUCTURES; KINETICS; MODEL;

D O I：

10.1007/s11661-015-3115-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental verification of a critical condition for the formation of coarse columnar gamma grain (CCG) structure in as-cast hyperperitectic carbon steels, which was put forward based on theories of grain growth and phase-field simulations in early studies, is carried out by means of a Bridgman-type directional solidification experiment. The occurrence of the discontinuous and continuous grain growth processes and the resulting formation of CCG and equiaxed gamma grain structures, respectively, are demonstrated. Importantly, these changes of the as-cast microstructures and the grain growth modes are in excellent agreement with the previously proposed critical condition of the CCG formation. (C) The Minerals, Metals & Materials Society and ASM International 2015

引用

页码：5240 / 5247

页数：8

共 23 条

[1] A Model for Predicting the Austenite Grain Size at the Surface of Continuously-Cast Slabs [J].