Heat Treatments (Leaving Cert Engineering): Flashcards
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Definition of annealing
Definition of annealing
Heat treatment process to soften materials, particularly steel
Purpose of annealing
Purpose of annealing
Makes materials more workable for further manufacturing
Heating temp. in annealing
Heating temp. in annealing
Approx. of steel's melting temperature
Purpose of soaking step
Purpose of soaking step
Ensures even heat distribution throughout component
Cooling method in annealing
Cooling method in annealing
Turn off oven, leave component inside to cool extremely slowly
Key characteristic of annealing
Key characteristic of annealing
Slow cooling rate
Recrystallisation in annealing
Recrystallisation in annealing
Formation of completely new grain structure within steel
Grain structure after annealing
Grain structure after annealing
Large, unstressed grain structure
Softness of annealed steel
Softness of annealed steel
Soft material that deforms easily
Ductility of annealed steel
Ductility of annealed steel
Ductile, allows shaping without breaking
Main application of annealing
Main application of annealing
Prepares steel for cold working processes
Cold working processes after annealing
Cold working processes after annealing
Bending, hammering, twisting, stretching
