Method for the fabrication of steels with high machinability
US4531972A · kind A · utility
4Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1983 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Nov 2, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C7/0056
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to the methods for the preparation of steels with high machinability, comprising globular inclusions which allow for high cutting speeds by means of carbide tools. The method according to the invention consists of introducing into a liquid steel which has been deoxidized carefully with aluminum, and desulfurized, additions of calcium and sulfur, carried out by a cored wire, the contents obtained being from 20 to 100 ppm calcium and 150 to 500 ppm sulfur. The steels prepared under this method offer a particular aptitude for high speed machining with the aid of carbide cutting tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.