Cast Iron Enamel Technology and Production Process

Release time:

2026-01-22 09:43

Source:

Cast iron enamel generally refers to gray cast iron coated with enamel. Main products include bathtubs, valves, and cookware. Gray cast iron is a raw material produced by melting pig iron for casting with scrap machine parts, scrap steel, and some alloying elements in a cupola or electric furnace. Gray cast iron has a relatively complex alloy structure, and the main chemical composition of castings varies depending on the specific melting, sand molding, casting process, and composition ratio.

The chemical composition of suitable cast iron blanks for enamel coating is as follows:

Carbon: 3.1-3.7% (of which graphite is 2.2-3%)

Silicon: 2.2-3%

Manganese: 0.35-0.80%

Phosphorus: 0.5-1%

Sulfur: 0.07-0.1%

 

The chemical composition of castings of the same type is generally similar. However, the success of enamel coating and the resulting excellent enamel surface depend on the actual operating conditions and casting experience of each foundry. Factors such as molten iron temperature, sand mold type, cooling rate, process design, and gating system settings all determine the internal crystal structure and surface finish of the casting.

Previous Page

Porcelain Enamel Ball Milling and Management

None

Next Page

Previous Page

Porcelain Enamel Ball Milling and Management

Next Page

None