| 摘要 |
Rolls for metal shaping have at least a peripheral surface of an iron-based Fe- B or Fe-B-C cast alloy having from 1 to 20 wt% chromium; from 0.5 to 3 wt% boron; up to 1.0 wt% carbon; or higher carbon if substantial amounts of strong carbide forming elements such as Mo, V, Ti, W and Nb are present; optional alloying additions including the Mo, V, Ti, W and Nb and also including Si, Al, Mn, Ni and Cu; and, apart from incidental impurities, a balance of Fe.
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