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Plasma Treatment Casting (PTC)

Plasma Treatment Casting (PTC). 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

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Plasma Treatment Casting (PTC)

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  1. Plasma Treatment Casting (PTC)

  2. 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 largerdimensions • Shrinkage and porosity elimination • Environmental emission reduction by 15%

  3. 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 metalwhile solidification- through multi-dimension electric and electromagnetic fields • Producing additional pressure in risers - reducing risers height by exchanging potential energy with kinetic energy

  4. The PTC Process The PTC process applies plasma arc during metals and metal alloys solidification process.The rotating plasma arc movesalong a prescribed path, defined bya special electrode. Confidential

  5. 1.6 Ton steel ingots Casting Yield increase from 80% to 93%

  6. Microstructure )center ( of 10 ton P-20 tool steel ingot Conventional ingot Plasma treated ingot Top Middle Bottom M x 50 Confidential

  7. Microstructure )R/2 ( of 10 ton P-20 tool steel ingot Conventional ingot Plasma treated ingot Top Middle Bottom M x 50 Confidential

  8. Microstructure ) Surface (of 10 ton P-20 tool steel ingot Conventional ingot Plasma treated ingot Top Middle Bottom M x 50 Confidential

  9. PTC improves austenite grain size of P20 tool steel Top Middle Bottom

  10. Microstructure )Bottom (of 12 ton AISI 4130 steel ingot PTC Conventional 75mm from surface 10mm from surface 150mm from surface

  11. Microstructure )Middle (of 12 ton AISI 4130 steel ingot PTC Conventional 150mm from surface 10mm from surface 75mm from surface

  12. Microstructure )Top (of 12 ton AISI 4130 steel ingot PTC Conventional 150mm from surface 10mm from surface 75mm from surface

  13. Grain size [micron] Grain size [micron] Grain size [micron] PTC improves grain size of AISI 4130 steel

  14. PTC improves hardness variation of AISI 4130 steel

  15. Average in cross-section Bottom Top Relative Ingot height PTCImproves Tensile strength Average along the ingot Tensile strength variation in Conventional and Plasma Treated 1.6 ton steel ingots after heat treatment

  16. 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

  17. 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)

  18. The PTC equipment

  19. The PTC equipment

  20. The PTC equipment PTC position during the PTC process

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