Transcript Steel Ingot Casting cost reducing PTC stirring process

NETANYA PLASMATEC LTD
Plasma Treatment Casting (PTC)
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NETANYA PLASMATEC LTD
PTC’s Competitive Advantages for high grade
steel ingot
•Production cost reduction by 10%-20%
•Ingot casting yield increase from 80% to 90%
•Segregation reduction
•Grain refinement
•Mechanical properties improvement
•Enables ingots casting with larger dimensions
•Shrinkage and porosity elimination
•Environmental emission reduction by 15%
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NETANYA PLASMATEC LTD
The Effects of PTC Process
•Replacing hot isolation- feeding the liquid metal with a
concentrated energy
•Reducing heat gradient - intensive heat exchange in liquid
metal
•Stirring liquid metal while solidification- through multidimension electric and electromagnetic fields
•Producing additional pressure in risers - reducing risers
height by exchanging potential energy with kinetic energy
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NETANYA PLASMATEC LTD
The PTC Process
The PTC process applies plasma arc
during metals and metal alloys
solidification process.
The rotating plasma arc moves
along a prescribed path, defined by
a special electrode.
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Confiden
NETANYA PLASMATEC LTD
1.6 Ton steel ingots
Casting Yield increase from 80% to 93%
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Microstructure
)center
( of 10
ton P-20 tool steel ingot
NETANYA
PLASMATEC
LTD
Conventional ingot
Plasma treated ingot
Top
Middle
Bottom
M x 50
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Microstructure
)R/2
( of 10 ton
NETANYA
PLASMATEC
LTD P-20 tool steel ingot
Conventional ingot
Plasma treated ingot
Top
Middle
Bottom
M x 50
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Microstructure
) Surface
(of 10
ton P-20 tool steel ingot
NETANYA
PLASMATEC
LTD
Plasma treated ingot
Conventional ingot
Top
Middle
Bottom
M x 50
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PTC improves austenite grain size
NETANYA PLASMATEC
of LTD
P20 tool steel
Top
Middle
Bottom
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Microstructure
NETANYA
PLASMATEC
)Bottom
(of 12LTD
ton AISI 4130 steel ingot
PTC
Conventional
10mm from surface
75mm from surface
150mm from surface
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Microstructure
NETANYA
PLASMATEC
)Middle
(of 12LTD
ton AISI 4130 steel ingot
PTC
Conventional
10mm from surface
75mm from surface
150mm from surface
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Microstructure
NETANYA
PLASMATEC
LTD AISI 4130 steel ingot
)Top
(of 12 ton
PTC
Conventional
10mm from surface
75mm from surface
150mm from surface
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PTC improves grain size of AISI 4130 steel
NETANYA PLASMATEC LTD
Middle
Grain size [micron]
Grain size [micron]
Bottom
location from surface [mm]
PTC
conventinal
Grain size [micron]
Top
location from surface [mm]
location from surface [mm]
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PTC improves
variation of AISI
NETANYA
PLASMATEC hardness
LTD
4130 steel
Bottom
Hardeness HD
Hardeness HD
Middle
surface
%R
%R
%R
center
surface
location from surface
%R
%R
%R
center
location from surface
Top
conventinal
Hardeness HD
PTC
surface
%R
%R
%R
center
location from surface
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NETANYA
LTD
PTCPLASMATEC
Improves
Tensile strength
Average in cross-section
Bottom
Average along the ingot
Top
Relative Ingot height
Tensile strength variation in Conventional and Plasma Treated
1.6 ton steel ingots after heat treatment
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NETANYA PLASMATEC LTD
PTC Improves Hardness variation As cast
Bottom
Top
Bottom
Top
Metal Hardness variation in Conventional and Plasma
Treated 1.6 ton steel ingots as cast
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NETANYA PLASMATEC LTD
PTC Improves Relative Elongation Variation
Relative elongation
variation in Conventional
and Plasma Treated 1.6
ton steel ingots after heat
treatment (average along
the ingot from top to
bottom)
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NETANYA PLASMATEC LTD
The PTC equipment
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NETANYA PLASMATEC LTD
The PTC equipment
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NETANYA PLASMATEC LTD
The PTC equipment
PTC position during the PTC
process
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