The inclusion formation mechanism of the 409L stainless steel

In order to solve the problem of the inclusion defects in the cold rolled 2B strip of 409L stainless steel, samplings have been taken from the cold rolled stainless steel strip, to facilitate the research for the forming process of the inclusions of TiN and MgO-Al 2 O 3 , etc., which presented in th...

Full description

Saved in:
Bibliographic Details
Published in:Materials research innovations 2015-11, Vol.19 (sup9), p.S9-377-S9-382
Main Authors: Qiang, R., Ju-Cang, L., Bin, X., Li-Juan, J., Hong-Liang, L.
Format: Article
Language:English
Subjects:
Clogging
Cold rolling
Defects
Ferritic stainless steels
Floaters
Flux
Flux floater
Inclusion modification
Inclusions
Molds
Plugging
Product [Ti]%×[N]
Stainless steels
Tin
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to solve the problem of the inclusion defects in the cold rolled 2B strip of 409L stainless steel, samplings have been taken from the cold rolled stainless steel strip, to facilitate the research for the forming process of the inclusions of TiN and MgO-Al 2 O 3 , etc., which presented in the hot steel of 409L and the submerged entry nozzle (SEN) clogging and flux floaters, with the aid of metallographic microscope and electron back scanner. It is revealed from the investigation that: the inclusions of 409L stainless steel consist of TiN inclusions, the complex inclusions nucleated upon MgO-Al 2 O 3 , enwrapped by TiN, and the complex inclusions from the mould flux picked up during the continuous casting process. The origins of the inclusions consist of the content of MgO-Al 2 O 3 and the product [Ti]%×[N]%; The mould flux picked up during the hot metal surface fluctuation caused by the SEN clogging and flux floaters in the mould. To eliminate the above-mentioned inclusions, it is recommended that proper control shall be implemented for the composition of N, Al and Ti in the hot steel, the inclusion modification during the smelting process, soft blowing after refining, killing, minimisation of re-oxidation and well-adjusted mould flux, etc., to minimise the inclusion defects in the final stainless steel products.
ISSN:1432-8917
1433-075X
DOI:10.1179/1432891715Z.0000000002023