| 摘要 |
The invention relates to a tool steel intended for cold working operations and having very high impact strength and good resistance to wear, said steel being made powder-metallurgically by consolidation of metal powder to a dense body. The steel has the following chemical composition expressed in weight-% 1-2.5 % C, 0.1-2 % Si, max 0.3 % N, 0.1-2 % Mn, 6.5-11 % Cr, max 4 % Mo, max 1 % W and 3-7 % V, wherein up to half the amount of vanadium can be replaced by 1.5 times as much niobium, and wherein the ratio V/C shall amount to between 2.5 and 3.7, balance essentially only iron and impurities and accessory elements in normal amounts. |
