1, production principle
(1) the production principle of continuous casting of copper rods is the high temperature state of liquid copper into the continuous casting machine casting pool, by increasing the coldness but the rate of its rapid solidification to form a square or hexagonal copper rods, after drawing, stretching and other subsequent processing, and ultimately processed into a variety of specifications of copper products. Continuous casting of copper rod particles are accurate, high density, tensile strength, ductility, electrical conductivity is relatively good, so the internal pure and unadulterated, so there are very few pores, physical properties and stability of the characteristics. However, the surface of the continuous casting of copper rods with irregularity and angle, more difficult to deal with.
(2) Extruded copper rods will be advanced deformation of the copper billet placed in a rod-shaped mold, along the axial application of pressure, extrusion molding at high temperatures and high pressures. Extruded copper rod billet raw material is more uniform, less miscellaneous quality, each copper rod straight line and length than continuous casting copper rod distribution is more uniform, so the dimensional accuracy of the processed higher. The surface of the extruded copper rods is smooth and neat.
2. Product performance:
Due to the continuous casting of copper rods for the casting organization, the casting process exists in the porosity, porosity, inclusions and other defects are difficult to avoid, and extrusion of copper rods through extrusion thermal deformation makes casting organization broken and recrystallization occurs back to the casting organization of the defects present in the weakened or eliminated, so the extrusion of copper rods material quality and stability is relatively high, extrusion of copper rods are commonly used in the field of direct machine forming, continuous casting of copper rods are used in the field of hot forging (red punch processing) to need to be again. Extruded copper rods are commonly used in the field of direct machine molding, while continuous casting rods are used in the field of hot forging (red punch) processing.
3. Common defects:
As the extruded rod is heated by the copper billet extrusion extension process, the defects in the copper billet will be extended with the extrusion, processed into parts is easy to form a penetrating defects and lead to leakage, so the processing of parts should be reasonably designed to seal the thickness of the material, the choice of process is also very critical, the leakage of vertical continuous casting is better than the level of continuous casting.
Continuous casting rod is cast organization, mechanical properties have inherent disadvantages, do not recommend direct processing of force-bearing, pressure-bearing parts, can not withstand riveting, bending and other mechanical processing: stress corrosion test requirements of the parts can not be selected direct processing of continuous casting rods, continuous casting rods casting process is the side of the crystallization of the side of the traction, easy to produce thermal cracks, direct processing of the parts will lead to fracture, leakage.
In summary, continuous casting of copper rods and extrusion of copper rods have their own advantages, enterprises should be based on their own production needs and causes and other factors to consider the choice, in order to optimize the production results.
