The optimized microstructure and properties of a V-Ti microalloyed forging steel by boron addition

被引：9

作者：

Zhao, Fan ^{[1
]}

Jiang, Bo ^{[2
]}

Xie, Jianxin ^{[1
]}

Liu, Yazheng ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, 30 Xueyuan Rd, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China

来源：

MATERIALS LETTERS | 2019年 / 236卷

关键词：

Boron; Steel; Intragranular ferrite; Phase transformation; Microstructure; INTRAGRANULAR FERRITE NUCLEATION; GRAIN-BOUNDARY SEGREGATION; NITROGEN CONTENTS; SOLID-PHASE; STRENGTH; CRYSTALLOGRAPHY; TOUGHNESS; AUSTENITE;

D O I：

10.1016/j.matlet.2018.10.154

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and properties of a V-Ti microalloyed forging steel was optimized by boron addition. The uneven distribution of boron suppressed the formation of grain boundary ferrite (GBF) and promoted the formation of intragranular ferrite (IGF) idiomorphs. The volume fraction of GBF decreases from 21.2% to 14.3%, while that of IGF idiomorphs increases from 3.5% to 10.2%. After boron addition, the strength of the steel has little change, but the total elongation increases from 21.2% to 23.6%, and the impact energy increases from 38.2 J to 51.4 J, which is attributed to the higher volume fraction of IGF idiomorphs. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：440 / 443

页数：4

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