Steel and mould tool for plastic materials made of the steel
US7722727B2 · kind B2 · utility
1Cited by
3References
68Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 2003 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/0068
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a steel, particularly a steel for mould tools for plastic moulding, having the following chemical composition in weight-%:0.43-0.60 C from traces to 1.5 Si from traces to 1.5 (Si+Al) 0.1-2.0 Mn 3.0-7.0 Cr 1.5-4.0 (Mo+), however max. 1.0 W 0.30-0.70 V max. 0.1 of each of Nb, Ti and Zr max. 2.0 Co max. 2.0 Ni balance essentially only iron and unavoidable impurities. After hardening and high temperature tempering at 520-560° C., the steel has a hardness of 56-68 HRC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.