Microalloyed steel and process for preparing a railroad joint bar
US5017335A · kind A · utility
4Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Jun 29, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D7/13
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A microalloyed, fully killed steel has a composition, in weight percent, of from about 0.20 to about 0.45 percent carbon, from about 0.90 to about 1.70 percent manganese, from about 0.10 to about 0.35 percent silicon, from about 0.01 to about 0.04 percent aluminum, from about 0.05 to about 0.20 percent vanadium, from about 0.008 to about 0.024 percent nitrogen, balance iron. The steel is particularly useful when hot rolled to a railway joint bar section, and air cooled. The resulting joint bar meets AREA specifications in the as-rolled condition, without the need for a reheat and oil quench heat treatment after rolling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.