Effect of Zr Microalloying on Austenite Grain Size of Low-Carbon Steels

被引：11

作者：

Shi, Minghao ^{[1
,2
]}

Kannan, Rangasayee ^{[2
]}

Zhang, Jian ^{[1
,3
]}

Yuan, Xiaoguang ^{[1
,2
]}

Li, Leijun ^{[2
]}

机构：

[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China

[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada

[3] Ansteel Beijing Res Inst, Beijing 102211, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2019年 / 50卷 / 06期

关键词：

HEAT-AFFECTED ZONE; MICROSTRUCTURE; TOUGHNESS; TI; INPUT;

D O I：

10.1007/s11663-019-01701-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of microalloying addition of Zr on the characteristics of inclusions and prior austenite grain sizes following a quench heat treatment has been investigated for two custom-made steels. The average size of particles in the Zr-containing steel is found to be the same as the Zr-free steel (0.49 mu m). However, the number of smaller particles in the Zr-containing steel is much higher than the Zr-free steel. The inclusions in the Zr-containing steel are composed of ZrO2-TiN-MnS, and inclusions in the Zr-free steel are consisted of TiOx-Ti(C,N). The average prior austenite grain size of the Zr-containing steel is consistently smaller than that of the Zr-free steel, due to a large number of fine oxide inclusions and Ti(C,N) precipitates, working to pin the austenite grain boundaries at temperatures up to 1673 K (1400 degrees C). The grain refinement mechanisms by inclusions through the addition of Zr are discussed via thermodynamic and kinetic calculations. (C) The Minerals, Metals & Materials Society and ASM International 2019

引用

页码：2574 / 2585

页数：12

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