Case hardened steel with high tempering temperature, method for obtaining same and parts formed with said steel
US6699333B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention discloses a carburizing steel composition comprising, by weight:0.06% to 0.18% of C;0.5% to 1.5% of Si;0.2% to 1.5% of Cr;1% to 3.5% of Ni;1.1% to 3.5% of Mo;and, if appropriate:at most 1.6% of Mn; and/orat most 0.4% of V; and/orat most 2% of Cu; and/orat most 4% of Co;the complement being constituted by iron and residual impurities;the amounts of Ni, Mn, Cu, Co, Cr, Mo and V in said composition, expressed by weight, satisfying the following relationships:2.5≦Ni+Mn+1.5Cu+0.5Co≦5  (1)2.4≦Cr+Mo+V≦3.7  (2)and a process for producing carburized and treated parts produced from the compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.