Continuous casting

Continuous casting

1. SAURABH NEGI 2061443 (02) mechanical ENGG. V SEM CONTINUOUS CASTING SUBMITTED TO: SUBMITTED BY :

2. CONTINUOUS CASTING

3. 1. Molten metal, from some nearby source, is poured into a  tundish . ( A tundish is a container that is located above the mold,it holds the liquid metal for the casting ) 2. This particular casting operation uses the force of gravity to fill the mold and to help move along the continuous metal casting. 3. The tundish is placed about 80-90 feet above the ground level . 4. The tundish is constantly supplied with molten steel to keep the process going. 5. The whole process is controlled to ensure there is smooth flow ofmolten steel through tundish . THE PROCESS

4. CONT. 6. Further, the impurities and slag are filtered in tundish before they move into the mold. 7. The entrance of the mold is filled with inert gases to prevent reaction of molten steel with the gases in the environment like oxygen. 8. The molten metal moves swiftly through the mold and it does not completely solidify in it. 9. The entire mold is cooled with water that flows along the outer surface.

5. CONT. 10. The metal casting moves outside the mold with the help of different sets of rollers. 11. While one set of rollers bend the metal cast, another set will straighten it. 12. This helps to change the direction of flow of the steel slab from vertical to horizontal.

6. ADVANTAGES OF CONTINUOUS CASTING ( i ) The process is cheaper than rolling. (ii) 100% casting yield. (iii) The process can be easily mechanized and thus unit labor cost is less. (iv) Casting surfaces are better. (v) Grain size and structure of the casting can be easily controlled. (vi)High roduction rates.

7. DISADVANTAGES 1.Continous and capable cooling of mould is required. 2.Just simple shapes can be cast. 3.Last capital investment is necessary to set up process. 4.Not proper for small scale production. 5.Require large ground space.

8. APPLICATION OF CONTINUOUS CASTING 1. A great tonnage of continuous casting is done using cast steel. 2. Other metals that are continuous casting are copper, aluminum, grey cast irons, white cast irons, aluminum bronzes, oxygen-free copper, etc. 3. Metals are cast as ingot for rolling, extrusion, or forging, and long shapes of simple cross section are cast as round, square, hexagonal rods, etc.