INCLUSION CONTROL IN A 16-MN STEEL USING A COMBINED RARE-EARTH AND CALCIUM TREATMENT

被引：16

作者：

SHI, LQ

CHEN, JZ

NORTHWOOD, DO

机构：

[1] Engineering Materials Group, University of Windsor, Windsor, N9B 3P4, Ontario

[2] Institute of Metal Research, The Chinese Academy of Sciences, Shenyang

来源：

JOURNAL OF MATERIALS ENGINEERING | 1991年 / 13卷 / 04期

关键词：

D O I：

10.1007/BF02834029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two treatment methods, namely Ca-Si injection into the ladle and rare earth (RE) additions to the mold, were investigated for their effectiveness in controlling the sulphide inclusions in a 16 Mn steel. Ca desulphurization did not completely remove all of the MnS inclusions and the RE inclusion shape modification treatment increased the amount of inclusions compared to using only a Ca treatment. A combined RE plus Ca treatment gave the best control of inclusion shape, amount, and distribution. The combination treatment also provides a relatively homogeneous distribution of Mn in the banded (ferrite + pearlite) structure of hot rolled sheet. A criterion for effective inclusion control is established whereby [RE/S]effective is equal to (or slightly higher than) 3. [RE/S]effective is given by the formula [RE/S]effective, = [RE/S] + 1.875 [Ca/Si] where RE, Ca, and S are the compositions of rare earth, calcium, and sulphur in weight percent in the steel sheet.

引用

页码：273 / 279

页数：7