| 简介 |
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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