15 FE CARBON DIA INTRO-1 - 1537 1545 2 1 3 1 ECTECTIC 2...

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1545 1 2 3 1. ECTECTIC 2. PERITECTIC 3. EUTECTOID 1537 Cementite Fe 3 C
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Fe- C diagram- REGIONS H Y P O EU T E C TOI D HY PEREUTECT IC H YP E R E U T E C TO ID STEEL CAST IRON 1131 723 0.8 2 4.3 1545 1537 0.16 1493 6.7 HYPO EUTEC TIC
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Fe- C diagram- simplified R P Q C 100 Fe Austenite+cementite- LEDEBURITE Ferrite + Cementite- PEARLITE MARTENSITE- a metastable phase of steel- by quenching- highly stressed α iron supersaturated with carbon
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EUTECTIC REACTION EUTECTIC TEMPERATURE LIQUID α+ β
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Location 1- Eutectic Reaction
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PERITECTIC REACTION Liquid + β α Peritectic Temperature PERI in Greek- Around
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Location 2- Peritectic Reaction δ Iron - BCC - γ Iron – FCC - AUSTENITE
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EUTECTIOD REACTION SOLID 1 SOLIDS 2 & 3 EUTECTIOD TEMPERATURE
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Location 3- EUTECTOID REACTION
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