Effect of Ti and Al addition on the distribution of MnS inclusion in steel during solidification

被引：0

作者：

Oikawa, K ^{[1
]}

Ohuchi, Y ^{[1
]}

Ishida, K ^{[1
]}

机构：

[1] Tohoku Natl Ind Res Inst, Mat Engn Div, Sendai, Miyagi 983, Japan

来源：

THERMEC '97 - INTERNATIONAL CONFERENCE ON THERMOMECHANICAL PROCESSING OF STEELS AND OTHER MATERIALS, VOLS I-II | 1997年

关键词：

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of Ti and Al additions on the morphology, size and distribution of MnS inclusions in Fe-0.1C-1Mn-0.02S(mass%) base alloys during solidification has been investigated by optical and scanning electron microscopy. The addition of Ti brings about a marked decrease in the size of MnS inclusions. Al additions, on the other hand do not effect any change in the size of the inclusions, instead change the MnS inclusions morphology from globular to rod-like. The formation mechanism of MnS inclusions is discussed on the basis of phase diagram information. It is shown that the changes in morphology and size of MnS inclusions depend on the nature of oxides such as (Ti,Mn)O, Al2O3 . MnO, Al2O3 etc. in the melts. As Al content is increased, deoxidation products tend to become richer in the high mehing Al2O3 particles, which act as the nucleation sites for the rod-like MnS inclusions. As Ti content is increased, the low melting oxide phase (Ti,Mn)O particles are formed, which acts as nucleant for the globular MnS inclusions. The reduction in size of the MnS inclusions on Ti addition is the result of successive nucleation events involving (Ti,Mn)O and the MnS nucleate at the solid/liquid interface of iron.

引用

页码：859 / 865

页数：7