By Jernkontoret

ISBN-10: 9172601566

ISBN-13: 9789172601567

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5°C/s Tq = 1450°C d = 55fLm o-dendrites and quenched liquid (L). 0°C/s Tq = 1300°C d = 70 fLm Figures 2-4: Former o-dendrites, transformed to y by the peritectic reaction. J '" < . •. •... 1°C/s = 1300°C = 120fLm x 25 400fLm { . ' ""-. i' 60 • Steel 303 STEEL 303. 0,5 % C Mo V 5 % CHROMIUM STEEL Designations SIS AISI Werkstoff Nr Composition (wt-%) C Si 0,50 1,00 p Mn 0,48 S 0,025 0,010 fs Thermal Analysis 0,0 T Cr Ni Mo Cu W v 5,1 0,18 1,36 0,10 0,02 1,20 0,2 DJ. O0 1350 0 1300 1250 -1,5 R 1200 0,5°C/s = o 100 300 200 Average Cooling Rate,R, rC/s) 2,0 Liquidus temperature, ferritic primary phase, QC Temperature of austenite formation, Temperature of formation Solidus temperature, QC QC CD of MC-austenite CD CD eutectic,QC CD 0,5 0,1 1460 1460 1460 1410 1410 1412 1320-1240 1345-1300 -1320 1140 1240 1260 Solidification range, cC 320 220 200 Solidification time, s 170 380 1900 Precipitates 1.

400 ........ : ,,' . )-- •.. ' Completely solidified _. ·4 I ~~. _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.

Temperature 1600 I 1400 1300 1200 l+y+Kc 900 Si 301 302 303 304 0,13 0,35 0,50 0,96 0,4 1,0 1,0 0,3 Mn Cr 0,4 0,5 0,5 0,7 5,0 5,2 5,1 5,2 Ni 0,2 0,2 0,1 Mo 0,6 1,3 1,4 1,2 V l a Chromium steels are produced as castings and ingots of moderate size, continuous casting is unusual. C I 1500 1000 No. 5% Cr I l+a Steels containing 17-25% chromium have not been examined. They are similar to the 13 % Cr-group in regard to solidification and structure at high temperatures. Both the groups of steels investigated are made with a wide range of carbon contents.

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A guide to the Solidification of Steels by Jernkontoret


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