Patent · US Expired

Process for the aluminothermic welding of rails with alloying of the weld metal in the rail head region

US6125913A · kind A · utility

1Cited by

3References

8Claims

0Family size

Assignee

Elektro-Thermit GmbH · US

Inventors

Gerhardus Johannes Mulder · Essen, DE
Michael Steinhorst · Essen, DE

Key dates

Filing date	Sep 9, 1997
Grant date	Oct 3, 2000
Priority date	—
Expiry date	Sep 9, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2101/26
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for the aluminothermic welding of rails, the aluminothermically produced steel being poured into a refractory mold surrounding the rail ends which are to be joined, and alloying additives being contacted with that part of the steel which runs out of the reaction crucible and forms the weld in the rail head region, wherein the alloying with the alloying additives is carried out after the completion of the aluminothermic reaction and separation of the steel from the slag during tapping and before the steel runs into the casting cavity formed by the mold, and the overflow in the casting mold is closed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.