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, Optimization of ingot geometry, casting technology and chemical composition of a 20 tons 42CrMo4 ingot to minimize A-segregation and increase material homogeneity Ovidiu Bogdan, Industrial Soft Montreal, Canada , Outline A Segregation in

  1. , Optimization of ingot geometry, casting technology and chemical composition of a 20 tons 42CrMo4 ingot to minimize A-segregation and increase material homogeneity Ovidiu Bogdan, Industrial Soft Montreal, Canada

  2. , Outline A Segregation in Steel Ingots Analysis Tools - Online Ingot and Mold Design - Online Solidification Simulation and Segregation Analysis - Segregation Prediction Technique Optimization of Ingot Geometry - H/D ratio, Ingot Taper, Hot Top Size Optimization of Casting technology - Pouring Temperature, Exothermic Material Optimization of Chemical Composition - C, Si, Mn, Cr, Mo Conclusions 2

  3. , Macrosegregation in Steel Ingots Macrosegregation Sulfur print in in steel ingots sectioned ingots 3

  4. , Online Ingot and Mold Design Assistant 4

  5. , Online Ingot and Mold Design Assistant 5

  6. , Online Solidification and A Segregation Analysis 6

  7. , Online Solidification and A Segregation Analysis 7

  8. , A Segregation Analysis Technique 8

  9. , A Segregation Assessment Indicators Segregation intensity Segregation area ratio 9

  10. , Optimization of Ingot Geometry 10

  11. , A Segregation function by H/D ingot ratio 11 H/D: 3.0 H/D: 4.0 H/D: 5.0

  12. , A Segregation function by Ingot Taper 12

  13. , A Segregation function by Hot Top Size Hot top 13.5% Hot top 16.7% Hot top 20.0% 13

  14. , Choosing the ingot geometry to minimize A segregation 14

  15. , A Segregation function by Pouring Temperature and Exothermic Material A Segregation area function by pouring temperature A Segregation area function by exothermic material 15

  16. , Optimization of chemical composition 16

  17. , A Segregation function by Carbon content 17 Carbon: 0.38% Carbon: 0.41% Carbon: 0.45%

  18. , A Segregation function by Silicon content 18 Silicon: 0.15% Silicon: 0.30% Silicon: 0.40%

  19. , A Segregation function by Molybdenum content 19 Molybdenum: 0.15% Molybdenum: 0.20% Molybdenum: 0.30%

  20. , A Segregation function by Chemical Element 20

  21. , Ingots for Forged Plates 21

  22. , Ingots for Forged Plates 22

  23. , Ingots for Forged Plates 23

  24. , Conclusions Having in view the results of experiments and solidification analysis, we can conclude the following: - to minimize A segregation in a forged bar we need an ingot with a high H/D ratio, small hot top and a steel with low C and Si and high Mo content; - to minimize A segregation in a forged plate we need a rectangular ingot with high sides ratio; - pouring temperature, ingot taper and Mn content have low influence on A segregation; - exothermic material and Cr content does not have influence on A segregation. Mold Design and A Segregation Analysis are easy to use tools available online with a PC, MAC, tablet or smart phone to design molds, analyze segregation and choose the mold function by steel grade and forged shape. 24

  25. , Contact OVIDIU BOGDAN, Industrial Soft, Canada Phone: 1-514-3425833 http://demo.simcade.com bogdan@castingsnet.com 25

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