HTT 110 · Metal Heat Treatment
Session 7 · Hour 1 · Shape is the story
Instructor cue 주철은 강이 아니다.
90 minNow Open · 5 min left · next Demo
Shape is the story
Desk 53 · HTT 110 · booth
Hold the heat.
graphitepreheatslow
A kindness is missing. A shock is a crack.
Name why a cast repair fears a shock of heat
0/6
Gray iron. Flakes. Casts well. Snaps if you shock it.
Ductile iron. Balls. Kinder than gray.
White iron. Hard. A wear friend.
Malleable. Cast, then heat writes a kinder iron.
Shape of graphite is the story.
Preheat. Slow cool. A shock is a crack.
CheckCompare gray, ductile, white, malleable. Point graphite shape. Write a repair checklist: preheat, heat input, slow cool. Do not invent a pattern. The approved paper owns the walk. Cast iron is brittle. A falling housing is a wound. Hot after a slow cool still bites. Experience is not a procedure.