Effect of titanium on the as-cast microstructure of hypereutectic high chromium cast iron

被引：103

作者：

Zhi, Xiaohui ^{[1
]}

Xing, Jiandong ^{[1
]}

Fu, Hanguang ^{[2
]}

Gao, Yiming ^{[1
]}

机构：

[1] Xian Jiaotong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi Prov, Peoples R China

[2] Beijing Univ Technol, Sch Mat Sci & Engn, Res Inst Adv Mat Proc Technol, Beijing 100022, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 09期

基金：

中国国家自然科学基金;

关键词：

high chromium cast iron; hypereutectic; refinement; microstructure; titanium;

D O I：

10.1016/j.matchar.2007.10.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of titanium on the as-cast microstructure of a hypereutectic high-Cr cast iron containing 4.0 wt./carbon and 20.0 wt.% chromium was investigated. With the increase of titanium concentration, the primary M(7)C(3) carbides were refined and the volume fraction of all carbides (primary and eutectic carbide) was decreased gradually. TiC particles became larger and agglomerated when the titanium concentration was 1.47 wt.%. Theoretical calculation and experimental results confirmed that TiC particles form before the precipitation of primary carbides. The first precipitated TiC particles can act as the heterogeneous substrate of M(7)C(3) carbides, which results in significant refinement of M(7)C(3) carbides. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：1221 / 1226

页数：6

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