Difference Between Brass Bar Extrusion and Horizontal Continuous Casting
Process Principles
Extrusion is a solid plastic forming process, which is to heat the brass billet to above the recrystallization temperature (about 750~900℃), and force the heated brass billet through a specific shape of die by external force to form a brass bar with the required cross-section. The extrusion process is suitable for producing brass bars with complex cross-sections, high precision and high strength. The brass bars produced by extrusion are more uniform, have fewer impurities, high precision, and a smooth and neat surface.
Horizontal continuous casting is a liquid metal solidification molding process. Molten copper is injected into the casting pool of the continuous casting machine, and then cooled and solidified to form square or hexagonal brass rods, which are then processed into brass products of various specifications through subsequent processing such as drawing. The inside of the continuous casting brass rod blank is pure and free of impurities, so it has the characteristics of very few pores and stable physical properties. However, the surface of the continuous casting brass rod has irregularities and angles, which are difficult to process.
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Features |
Extruded Brass Bar |
Horizontal Continuous Casting Brass Bar |
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Organizational Structure |
Small and dense grains, no casting defects | Columnar crystal structure, there may be pores and segregation |
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Mechanical Properties |
High strength (work hardening effect) and good ductility | Low strength, requiring subsequent processing to improve performance |
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Dimensional Accuracy |
High (precision mold control) | General (affected by solidification shrinkage and traction stability) |
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Surface Quality |
Smooth, thin oxide layer, can be used directly | Rough and may have oxide scale that needs to be removed |
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Production Length |
Usually shorter(limited by the extruder) | Up to hundreds of meters in length(continuous production) |
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Production Costs |
High (equipment, mold, energy consumption) | Low (continuous production, low energy consumption) |
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Production Cycle |
Single molding is fast, suitable for small batch customization | Continuous and efficient, suitable for large-scale standardized production |
