Non-Magnetic Steel Structure For A Steel Or Aluminium Making Process
A non-magnetic steel structure for a steel or aluminium making process, which non-magnetic steel structure is arranged to enable penetration of a magnetic field from an electromagnetic stirrer or electromagnetic brake into a melt in a vessel for molten metal, wherein the non-magnetic steel structure includes manganese in the range 12-40 mass %.
1 . A fully austenitic high manganese non-magnetic steel structure for a steel or aluminium making process, wherein the non-magnetic steel structure is one of a housing of an electromagnetic stirrer or electromagnetic brake, a window of a ladle, a window of an electromagnetic arc furnace or an aluminium furnace, a window of a casting mould, and a strand support roller for supporting semi-solidified strands, and wherein the non-magnetic steel structure consists of manganese in the range 12-40 mass %, carbon in the range 0.5-1.0 mass %, aluminium in the range 0.1-1.5 mass %, silicon in the range 0.05-1.5 mass %, the remaining content of the non-magnetic steel structure being composed of iron and impurities.
2 . The non-magnetic steel structure as claimed in claim 1 , wherein the manganese is in the range 12-30 mass %.
3 . The non-magnetic steel structure as claimed in claim 1 , wherein the manganese is in the range 16-30 mass %.
4 . The non-magnetic steel structure as claimed in claim 1 , wherein the manganese is in the range 18-30 mass %.
5 . The non-magnetic steel structure as claimed in claim 1 , wherein the manganese is in the range 20-30 mass %.
6 . The non-magnetic steel structure as claimed in claim 1 wherein the manganese is in the range 20-25 mass %.
7 . A vessel for molten metal for a continuous casting process, wherein the vessel for molten metal is one of an electric arc furnace and a ladle, which vessel comprises:
a refractory material forming an internal lining of the casting vessel, and
a non-magnetic steel structure wherein the non-magnetic steel structure is one of a housing of an electromagnetic stirrer or electromagnetic brake, a window of a ladle, a window of an electromagnetic arc furnace or an aluminium furnace, a window of a casting mould, and a strand support roller for supporting semi-solidified strands, and wherein the non-magnetic steel structure consists of manganese in the range 12-30 mass %, carbon in the range 0.5-1.0 mass %, aluminium in the range 0.1-1.5 mass %, silicon in the range 0.05-1.5 mass %, the remaining content of the non-magnetic steel structure being composed of iron and impurities, the non-magnetic steel structure forms part of an external shell of the refractory material and forms a non-magnetic window of the vessel for molten metal.
8 . An electromagnetic stirrer or electromagnetic brake for a steel or aluminium making process, wherein the electromagnetic stirrer or electromagnetic brake comprises:
an electromagnetic circuit arranged to generate a magnetic field, and
a non-magnetic steel structure wherein the non-magnetic steel structure is one of a housing of an electromagnetic stirrer or electromagnetic brake, a window of a ladle, a window of an electromagnetic arc furnace or an aluminium furnace, a window of a casting mould, and a strand support roller for supporting semi-solidified strands, and wherein the non-magnetic steel structure consists of manganese in the range 12-30 mass %, carbon in the range 0.5-1.0 mass %, aluminium in the range 0.1-1.5 mass %, silicon in the range 0.05-1.5 mass %, the remaining content of the non-magnetic steel structure being composed of iron and impurities forming a non-magnetic housing of the electromagnetic circuit.
9 . The non-magnetic steel structure as claimed in claim 2 , wherein the manganese is in the range 16-30 mass %.
10 . The non-magnetic steel structure as claimed in claim 2 , wherein the manganese is in the range 18-30 mass %.
11 . The non-magnetic steel structure as claimed in claim 3 , wherein the manganese is in the range 18-30 mass %.
12 . The non-magnetic steel structure as claimed in claim 2 , wherein the manganese is in the range 20-30 mass %.
13 . The non-magnetic steel structure as claimed in claim 3 , wherein the manganese is in the range 20-30 mass %.
14 . The non-magnetic steel structure as claimed in claim 2 wherein the manganese is in the range 20-25 mass %.
15 . The non-magnetic steel structure as claimed in claim 3 wherein the manganese is in the range 20-25 mass %.