Discover the factors that let molten metal fill a mould completely.
Section 1
Define fluidity in the context of metal casting.
List the factors that increase or decrease fluidity.
Relate low fluidity to misrun and cold-shut defects.
Section 2
Fluidity is the ability of molten metal to flow and fill every detail of a mould before it solidifies. High fluidity captures thin sections and fine detail, while low fluidity can leave the cavity partly unfilled.
Pouring temperature, alloy composition, mould material and pouring rate all affect fluidity.
If the metal freezes before filling the mould, the result is a misrun (incomplete casting) or a cold shut, where two streams meet but fail to fuse. Raising the pouring temperature is a common way to improve fluidity.
Section 3
Interactive animation will appear here.
Animated visualizations for this mission are being crafted and will be embedded in this space.
Section 4
Interactive activity coming in Sprint 3.
Hands-on drag-and-drop and simulation activities will be unlocked here in the next sprint.
Section 5
Answer all 5 questions correctly to unlock the next mission.