Molten metal from an induction furnace is fed directly into a mold with the required shape. The molten metal enters the die through a series of holes in the u
Molten metal from an induction furnace is fed directly into a mold with the required shape. The molten metal enters the die through a series of holes in the upper portion of the mold. Heat is extracted by the water-cooled jacket surrounding the mold, and the metal solidifies. The molten metal above the die acts as a riser keeping the die filled and preventing the formation of shrinkage cavities in the required finished form: bar, tube or special shape .
Solidification occurs in the die and then the solidified metal casting exits through the bottom of the die by means of a continuous process of short intermittent extractions performed by a mechanical device .
The product is withdrawn at controlled increments and speed until the production length is met. Lengths are cut off by a traveling saw which moves with the cast shape. The standard length for continuous cast material is 144 inches.
Since continuous casting operates as a true gravity fed bottom-flow casting method, the process minimizes the possible trapping of casual dirt and dross in the casting. Foreign matter in the furnace crucible floats to the top of the melt so it does not become part of the cast product.
Low casting temperatures combined with the chill mold and directional solidification inherent in this process promote a homogeneous, fine-grained, high-density product with high yield.
A horizontal method of continuous casting has also found some favor in the foundry industry. The principle is basically the same as it is for the vertical method, except the equipment stretches out horizontally and is contained on one level. Tube hollows produced by the horizontal method require somewhat more stock allowance to compensate for the natural effect of gravity on ovality and straightness.
Shapes other than solid round bar and tube hollows are routinely cast by either method. Rectangular, hexagonal, square, gears with teeth, and a multitude of other shapes lend themselves to the continuous cast method. This method is excellent for producing small inside diameters.
Continuous cast products can offer cost advantages over other types of casting if the optimum quantity, shaping, and sizes are chosen.
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Harm of too high temperature: when molten steel out of cooper mold, the billet shell is thin and easy to break out; The accelerated erosion of refractory can ea
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1. The barrier function (mainly completed by the liquid slag layer) isolates the contact between air and molten steel, blocks the secondary oxidation of molten
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In continuous casting, low corrosion resistance often occurs, which directly leads to uneven composition and will eventually affect the smelting quality. In or