Process for the continuous casting of an austenitic stainless steel strip onto one or between two moving walls with dimpled surfaces, and casting plant for its implementation
US5807444A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The subject of the invention is a process for the continuous casting of an austenitic stainless steel strip directly from liquid metal of composition, expressed in percentages by weight: C.ltoreq.0.08%, Si.ltoreq.1%; Mn.ltoreq.2%; P.ltoreq.0.045%; S.ltoreq.0.030%; Cr between 17.0 and 20.0%; Ni between 8.0 and 10.5% on a machine for casting onto one or between two moving walls whose external surface is provided with dimples and in which the region surrounding the meniscus is inerted with an inerting gas of controlled composition, wherein: PA1 a Cr.sub.equ /Ni.sub.equ ratio greater than 1.55 is conferred on said liquid metal, with: PA2 Cr.sub.equ =% Cr+1.37.times.% Mo+1.5.times.% Si+2.times.% Nb+3.times.% Ti and PA2 Ni.sub.equ =% Ni+0.31.times.% Mn+22.times.% C+14.2.times.% N+% Cu; PA1 one or more moving walls are used whose entire surface includes touching dimples having a diameter of between 100 and 1500 .mu.m and a depth of between 20 and 150 .mu.m; PA1 and an inerting gas is used consisting, at least partially, of a gas which is soluble in steel. The subject of the invention is also a casting plant for implementing this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.