Process for case hardened dies in improving die life
US6695930B2 · kind B2 · utility
2Cited by
5References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 25, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Aug 14, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Steel alloys susceptible to case and core hardening comprise 0.05 to 0.24 wt % carbon; 15 to 28 wt % cobalt and 1.5 to 9.5 wt % in nickel, small percentages of one or more additives: chromium, molybdenum, and vanadium; and the balance iron. Carburized roll form and punch dies and tools made from case hardened steel alloys with a reduced hardness core provide high wear and fatigue resistance as well as improved contact and bending fatigue resistance thereby avoiding premature failure and extending the useful life of such tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.