Casting Brass Used for Producing Castings. Brass castings are widely applied in mechanical manufacturing, shipbuilding, aviation, automotive, construction, and other industrial sectors, occupying a significant position in heavy non-ferrous metal materials and forming a casting brass series.
1. **Chemical Composition of Casting Brass**
Casting brass is a Cu-Zn binary alloy with zinc as the primary alloying element, commonly referred to as ordinary brass. Ordinary brass exhibits moderate strength, hardness, and excellent casting properties, but it shows poor wear resistance, corrosion resistance, particularly against flowing seawater, steam, and inorganic acids. By incorporating various alloying elements, its mechanical, physical, and chemical properties can be enhanced, leading to specialized brass varieties suitable for specific environments, such as naval brass, free-cutting brass, high-strength manganese brass, and die-casting brass.
2. **Casting Processes** Due to differences in melting point, fluidity, solidification shrinkage, sensitivity to gases, volatility, and thermal cracking tendency among casting brass alloys, their applicable casting methods vary.
Common casting techniques for casting brass include die casting, sand casting, centrifugal casting, continuous casting, and investment casting.
The selection of casting methods must be tailored to the specific alloy.
