Process for connecting frogs consisting of austenitic manganese steel casting with rails consisting of carbon steel

US4724890A · kind A · utility

Assignee

• Voest-Alpine · AT

Inventors

• Alfred Moser · Leoben, AT
• Hubert Augustin · Geldern, DE

Key dates

• Filing date: Jul 10, 1986
• Grant date: Feb 16, 1988
• Expiry date: Jul 10, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K35/34
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

For the purpose of connecting frogs consisting of austenitic manganese steel casting with rails consisting of carbon steel there is proposed an aluminothermic process in which the carbon content of the aluminothermic welded connection is limited with 0.2 percent by weight. In this case, the procedure is preferably such that the composition of the melt corresponds, as related to the Schaffler-diagram, to a Ni-equivalent of 13 to 35 percent and to a Cr-equivalent of 8 to 25 percent, noting that for a carbon content of .ltoreq.0.15 percent and preferably .ltoreq.0.1 percent, the equivalent value for Ni is 1x%Ni+30x%C+0.5%Mn and the equivalent value for Cr is 1x%Cr+1x%Mo+1.5x%Si.