Casting is one of the earliest metal heat treatment processes mastered by humans, with a history of approximately 6,000 years. China entered the heyday of bronze casting between 1700 and 1000 BC, having reached a high level of craftsmanship. Casting involves melting solid metal into a liquid and pouring it into a specific shaped mold, allowing it to solidify into the desired shape. Cast metals include copper, iron, aluminum, tin, lead, etc., while the common material for molds is sand, clay, water glass, resin, and other auxiliary materials. Special casting molds include investment casting, lost foam casting, metal mold casting, ceramic mold casting, etc. (Sand includes quartz sand, magnesia sand, zircon sand, chromite sand, peridotite sand, andleucite sand, graphite sand, iron sand, etc.)

Casting is one of the earliest metal heat treatment processes mastered by humans, with a history of approximately 6,000 years. China entered the heyday of bronze casting between 1700 and 1000 BC, having reached a high level of skill in the craft. Casting involves pouring molten metal into a mold cavity shaped to match the part, allowing it to cool and solidify to obtain the finished part or blank. [1] The materials to be cast are typically solids that are heated to become liquid, such as copper, iron, aluminum, tin, and lead, while the mold materials can be sand, metal, or even ceramic. Different requirements call for different methods of casting.