| 摘要 |
1. The use of a heat-treatable steel as the basic material of composite steels with a high-speed steel layer or as the carrier material of bimetallic strips formed with a high-speed steel area, with, in percentages by weight, from 0.30 to 0.65 C, from 0.10 to 0.40 Si, from 0.30 to 1.0 Mn, from 0.80 to 1.30 Cr, at least one of the following alloy elements : from 0 to 1.5 Mo, from 0 to 1.5 Ni, from 0 to 0.25 V, from 0 to 1.5 W and, as microalloy elements, from 0.03 to 0.15 Ti and/or from 0.03 to 0.15 Nb, and in addition from 0.005 to 0.02 B and/or from 0.02 to 0.1 Al, the rest Fe with impurities due to smelting. |
