| 摘要 |
The invention concerns a steel material which is powder metallurgy manufactured and has a chemical composition which contains in weight -%: 2.2-3.3 (C + N), however at least 0.3 C and at least 0.06 N, 0.1-2.0 Si, 0.1-2.0 Mn, 19-23 Cr, max. 2.0 Ni, max. 2.0 Co, 0.5-3.0 (Mo + W/2), however max. 1.0 W, 4.2-7.5 (V + Nb/2), however max. 0.1 Nb, max. 0.2 S balance essentially only iron and impurities in normal amounts. The steel is particularly suitable for encapsulation of electronic components in reinforced plastic material. The steel in the tool contains 25-35 vol-% carbides, nitrides, and/or carbonitrides. |
