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Heat Treatment of Steel
~Quenching
~Annealing
~Tempering
~Normalizing

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Heat treatment of steel
-annealing
-Normalizing
-quenching
-tempering

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Heat treatment of steel:
-Annealing
-Normalizing
-Quenching
-Tempering

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Heat treatment of steel:
-Annealing
-Normalizing
-Quenching
-Tempering

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Heat Treatment of steel
1) Annealing
-heat to an elevated temp. and maintain it for some time , then cooled.
2) Normalising
-Heat , soak and then air cooled.
3) Quenching
-using brine, water, oil or air cooled
-cooling rate : water>oil>air
4) Tempering
-heat , soak and air cooled (martensite to Tempered martensite)
-austempering, produces bainite

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Chapter 6
Heat treatment of steel
1) quenching
2) annealing
3) normalizing
4) tempering

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Heat treatment of steel which is quenching, annealing, normalizing and tempering

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Chp 6 Heat treatment of steel
-quenching
-annealing
-normalizing
-tempering

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Heat treatment of steel
1 annealing
2 normalizing
3 quenching
4 tempering

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Heat treatment of steel:
1. Annealing - heating, soaking and furnace cooled
2. Normalizing - heating, soaking and air cooled.
3. Quenching - brine quench (fastest cooling rate), water quench ( fast and cheap), oil quench (flammable) and air cool (slow).
4. Tempering

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Heat treatment of steel:
1. annealing
2. normalizing
3. quenching
4. tempering

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Heat treatment of steel
1) annealing - the time at the high temp is long enough to allow the desired transformation to accur
2) normalizing
1 Heating 2 Soaking 3 Air cooled
3)quenching
medium( brine quench, water quench, oil quench, air cool)
-brine quench is fastest cooling rates but it can make steel corrosive
4)tempering

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Heat treatment of steel
1 annealing
2 normalizing
heating-soaking-aircooled
3 quenching
4 tempering

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Heat treatment of steel
1 annealing
2 normalizing
3 quenching
4 tempering

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Heat treatment of steel(annnealling,normalizing,quenching,tempering)

Annealling
1. Heating
2.soaking
3. Furnace cooled

Normalizing
1.heating
2.soaking
3.air cooled

Quenching
-medium( brine quench, water quench, oil quench, air cool)
-brine quench is fastest cooling rates but it can make steel corrosive

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Heat treatment of steel - annealing , normalizing , quenching , tempering

Annealing - relieve internal stress
1 heating 2 hypoeutectoid 3 soaking 4 furnace cooled

Normalizing
1 Heating 2 Soaking 3 Air cooled

Quenching
1 Heating

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heat treatment of steel
1)annealing
2)normalizing
3)quenching
4)tempering

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Heat treatment of steel
1) annealing - the time at the high temp is long enough to allow the desired transformation to accur
2) normalizing
3)quenching
4)tempering

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heat treatment of steel:
1) annealing - relieve internal stresses, increase ductility and toughness. (Subcritical)-remove effects of cold work by recrytalizzation of ferite. (Spherodizing)-improve ductility of material.

2)normalizing - heating, soaking, air-cooled

3)quenching [MARTENSITE] - brine quench(fastest cooling rate) , water quench(cheap and fast), oil quench(flammable), air cool(relatively slow).