A process for the production of rolling mill cast rolls and...

Details A process for the production of rolling mill cast rolls and... A process for the production of rolling mill cast rolls and...

B - Operations, Transporting

22

D

B22D 25/00 (2006.01) C22B 7/00 (2006.01) C22C 1/02 (2006.01)

Patent

CA 2667819

The present invention is directed to a rolling mill cast roll with a higher resistance to adhesion and propagation of cracks, and the process for the manufacture thereof, said process comprising the steps of: introduction (1) of waste liquid metal (a), alloy elements (b) and a lot of scrap (c) into a melting furnace; next, melting (2) of the load at about 1,200°C to 1,500°C; next, chemical pre--analysis (3) of a sample (d) of the load in order to correct (4) the chemical composition (through the addition (e) of iron alloys or pure metals); next, addition (5) of sulfur (f) to the load and another chemical pre-analysis (6) of a new sample (g) of the load in order to correct (7) the chemical composition (h) is made; next, addition (8) of at least one rare earth metal (k) to the foundry ladle (j); transfer (9) of the liquid metal (i) from the melting furnace to the foundry ladle (j); and finally transfer of the content of the foundry ladle to the casting equipment (10), thus forming the semi-finished roll (11).

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