What is cold-rolled cast-in channel

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Cold rolling refers to a rolling method in which the steel is squeezed with the pressure of a roller at normal temperature to change the shape of the steel. Although the processing process will also increase the temperature of the steel plate, it is still called cold rolling.

Generally, cold-rolled steel such as galvanized and color steel plates must be annealed, so the plasticity and elongation are also good, and they are widely used in automobiles, home appliances, hardware and other industries. The surface of the cold-rolled sheet has a certain finish. The thinnest thickness of the hot-rolled steel strip is generally 1.0mm, and the cold-rolled steel strip can reach 0.1mm. Hot rolling is rolling above the crystallization temperature, and cold rolling is rolling below the crystallization temperature.

The change of the shape of the steel by cold rolling belongs to continuous cold deformation. The cold work hardening caused by this process causes the strength and hardness of the rolled hard coil to rise and the toughness and plasticity index to decrease. The product is suitable for simple deformed parts.

Advantage:

1. It can destroy the casting structure of the steel ingot, refine the grains of the steel, and eliminate the defects of the microstructure, so that the steel structure is compact and the mechanical properties are improved.
2. This improvement is mainly reflected in the rolling direction, so that the steel is no longer isotropic to a certain extent.
3. The bubbles, cracks and looseness formed during pouring can also be welded under the action of high temperature and pressure.

Disadvantages:

1. After hot rolling, non-metallic inclusions (mainly sulfides and oxides, as well as silicates) inside the steel are pressed into thin slices and delamination occurs. The delamination greatly deteriorates the tensile properties of the steel in the thickness direction, and there may be interlayer tearing when the weld shrinks. The local strain induced by the shrinkage of the weld often reaches several times the yield point strain, which is much larger than the strain caused by the load.
2. Residual stress caused by uneven cooling. Residual stress is the stress of internal self-phase balance without external force. Hot-rolled steel sections of various cross sections have this type of residual stress. The larger the section size of the general steel section, the greater the residual stress. Although the residual stress is self-balanced, it still has a certain influence on the performance of the steel member under the action of external forces. Such as deformation, stability, fatigue resistance, etc. may have adverse effects.

cold rolled cast-in channel

Geoda is committed to the Cast-in channel system and uses advanced Swiss cold riveting technology to ensure reliable and durable load capacity. We provide high quality hot rolled cast-in channel and cold rolled cast-in channel, together with our semi-automatically produced hot forged T-bolts, we can provide a complete Cast-in channel system.

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