ANNEALING
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NORMALISING
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Main purpose of annealing is to
relieve internal stresses
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Main purpose of normalising is to
improve mechanical properties.
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Less hardness, more T.S & Toughness
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Slightly more hardness, less T.S & Toughness.
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Pearlite is coarse
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Pearlite is fine and usually appears
unresolved with optical microscope.
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Grain size distribution is more.
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Grain size distribution is less.
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Internal stresses are least.
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Internal stresses are slightly more.
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Furnace cooling is employed.
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Air cooling is employed.
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Cooling rate is slow.
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Cooling rate is high.
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Costly and inconvenient.
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Economical and more convenient.
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