OEM service precision parts of brass products
- Gray iron castings
Good fluidity, small body shrinkage and line shrinkage. The comprehensive mechanical properties are low, and the compressive strength is about 3 to 4 times higher than the tensile strength. Good vibration absorption. The elastic modulus is low. OEM service precision parts of brass products
Application: The shape can be complex, and the structure can be asymmetrical. There are box type, cylinder type, etc., for example, castings such as cylinder blocks, cylinder sleeves, various machine tool beds, bases, flat plates, platforms, etc. for engines.
- Ductile iron castings
The fluidity is similar to that of gray cast iron; the body shrinkage is larger than that of gray cast iron, while the linear shrinkage is small, which is easy to form shrinkage holes and looseness. The comprehensive mechanical properties are higher, and the elastic modulus is higher than that of gray cast iron; the wear resistance is good; the impact toughness and fatigue strength are better. The vibration damping capacity is lower than that of grey cast iron. OEM service precision parts of brass products
Application: Generally, it is designed to have a uniform wall thickness; for thick and large section parts, hollow structures can be used, such as ductile iron crankshaft journal parts.
- Malleable iron castings
Flowability is poorer than grey cast iron; bulk shrinkage is large, and after annealing, final linear shrinkage is small. Before annealing, it is very brittle and the blank is easily damaged. The comprehensive mechanical properties are slightly inferior to that of ductile iron, and the impact toughness is 3 to 4 times larger than that of gray cast iron.
Application: Because the casting state requires white mouth, it is generally thin-walled and uniform, and the common thickness is 5-16mm. In order to increase its rigidity, the shape of the section is mostly I-shaped, T-shaped or box-shaped, avoiding cross-shaped section; the protruding part of the parts should be reinforced with ribs.
- Steel castings
The fluidity is poor, and the volume shrinkage, line shrinkage and crack susceptibility are large. High comprehensive mechanical properties; compressive strength and tensile strength are almost equal. Poor vibration absorption. OEM service precision parts of brass products
Application: The structure should have minimal thermal nodes and create conditions for sequential solidification. The connection and transition of adjacent walls should be more smooth; the cross-section of castings should adopt box-shaped and trough-shaped structures that are close to closed; some horizontal walls should be changed to inclined walls or wavy shapes; It is best to be oval or round, and the edge of the window must be raised to reduce the possibility of cracks.
- Tin bronze and phosphor bronze pieces
Casting properties are similar to gray cast iron. However, the crystallization range is large, and shrinkage cavities are prone to occur; the fluidity is poor; the high temperature performance is poor, and it is easy to be brittle. The strength decreases significantly with increasing cross-section. Good abrasion resistance.
Application: The wall thickness should not be too large; the protruding parts of the parts should be reinforced with thinner reinforcing ribs to avoid thermal cracking; the shape is not easy to be too complicated. OEM service precision parts of brass products
- Wuxi bronze and brass parts
The shrinkage is large, the crystallization range is small, and it is easy to produce concentrated shrinkage holes; the fluidity is good. Wear-resistant and corrosion-resistant.
Application: Similar to steel castings.
Seven, aluminum alloy parts
Casting properties are similar to cast steel, but the strength decreases more significantly with increasing wall thickness.
Application: The wall thickness should not be too large; the rest are similar to steel castings. OEM service precision parts of brass products