Download PDF by Jernkontoret: A guide to the Solidification of Steels

By Jernkontoret

ISBN-10: 9172601566

ISBN-13: 9789172601567

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_J" I' '-.. ;-. - f". ,I,. {J .. -' , .. I Y ". \..... •.. Figure 2 R = 2,0°C/s Tq = 1350°C d = 70 fLm Figures 2 - 4: Former o-dendrites, transformed to y by the peritectic reaction. r· R Tq d = 0,1°C/s = 1350°C 160 fLm x 25 Steel211 STEEL 211. 7218 Composition (wt-%) Nr C Si Mn p S Cr Ni Mo Cu v 0,29 0,21 0,62 0,012 0,006 1,11 0,15 0,21 0,04 0,04 Thermal Analysis 0,0 0,2 0,4 0,6 0,8 N 0,011 0,004 1,0 CD t 1500 1450 1400 0 dT d,( 1350 R = a,scC/s -1,5 1300 0 100 200 Average Liquidus temperature, ferritic primary phase, cC Temperature of austenite formation, cC Solidus temperature, cC CD CD CD 300 t(s) Cooling Rate,R, eC/s) 2,0 0,5 0,1 1501 1501 1503 1460 1471 1475 1420 1435 1450 Solidification range, cC 85 65 55 Solidification time, s 95 220 630 Precipitates Small amount of MnS.

D = 0,1°C/s 1290°C = 130 fLm x 25 Steel 215 • 51 Figure 5 R Tq = O,5°C/s = 1290°C Interdendritic area with carbide-austenite eutectic (El, Fe3P and MnS. x 1000 52 • Steel 216 STEEL 216. 0,5 ° 1350 -0,5 1300 -1,0 - 1,5 R = 0,5 C/s 125O Average 2,0 Liquidus temperature, Temperature Solidus temperature, Solidification Solification austenitic of formation C primary phase, DC of eutectic, QC CD CD 300 200 100 ° CD 1450 1320-1270 range, C time, s L(S) Cooling Rate,R, ("C/s) 0,5 0,1 1450 1451 1340 -1300 -1300 ~1300 1270 1300 180 150 150 170 330 1400 Precipitates 1.

1 A /, • I < Completely solidified ~Jf' I r .. ~ Y I' , , -- , . ,\ " •• 25 , I 'r \ i ,. • .. - , 1& \ ~ )- ~ ) ) " \ x liquid (L). \ . Figure 3 J '. I ,-. I •.. ( , • R = O,5°C/s Tq = 1360°C d =110fLm Figures 3-4: Former o-dendrites, transformed to y by the peritectic reaction. ,.. I \'" . , r x 25 - Figure 4 R Tq d " ", = O,1°C/s = 1360°C =180fLm 400 fLm x 25 Steel 213 • 45 STEEL 213. m o-dendrites and quenched liquid (L). (-- . m Figures 2 - 4: Former Il-dendrites, transformed to y by the peritectic reaction.

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A guide to the Solidification of Steels by Jernkontoret


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