A guide to the Solidification of Steels by Jernkontoret PDF

By Jernkontoret

ISBN-10: 9172601566

ISBN-13: 9789172601567

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8159 Nr Composition (wt-%) C Si Mn p S Cr Ni Mo Cu 0,52 0,22 0,85 0,010 0,006 1,07 0,07 0,07 0,04 fs Thermal Analysis 0,0 0,2 0,4 0,6 N 0,14 0,008 ~0,004 1,0 0,8 dT d"t T (OC) (OC/s) CD t 1500 +1,5 T +1,0 1450 +0,5 0 1400 dT dt -0,5 1350 -1,0 -1,5 R = O,soC/s 1300 0 200 100 300 't (5) Average Cooling Rate,R, eC/s) 2,0 Liquidus Solidus temperature, temperature, austenitic °C Solidification range, °C Solidification time, s CD primary phase, °C CD Small amount carbides. :. -.. ' " . ' ", ( • . I , .

Lm Figures 2-4: Former o-dendrites, (transformed to y by the peritectic reaction), and interdendritic carbide eutectic. •. \ , " '\ ,/" ~. ~" ' •• \ I \";; Figure 5 "I t. t,' (" i11'~ " ' R = 2,0°C/s Tq = 1290°C Quenched liquid. ' , 10 jLm x 1000 \ " Figure 6 , , R = 2,0°C/s Tq = 1200°C Eutectic formation of MC. • . \ Figure 7 R = 2,O°C/s Tq = 1000°C Morphology of MC. , " ,. ,/ I. •. •.. • l' '( •..... -{ Figure 8 R = 2,O°C/s Tq = 1000°C Interdendritic distribution x 150 of MC . Steel 304 • 63 STEEL 304.

M23C6, K2 = M7C3) 29 primary austenite formation It should be noted that the pseudobinary phase diagrams are strictly valid for ternary Fe-Cr-C-alloys only. The superimposed lines for the commercial steel grades are therefore only indicative. References The solidification of chromium steels has not been widely studied. General aspects of the process have been reported, [55-59]. Research work on microsegregation is described in references [60-64]. 56 • Steel 301 STEEL 301. Lm o-dendrites and quenched liquid (L).

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A guide to the Solidification of Steels by Jernkontoret


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