Patent · US Expired

Method of flash butt welding high-carbon material, in particular nodular cast iron

US5091624A · kind A · utility

2Cited by

6References

3Claims

0Family size

Assignee

Georg Fischer LLC · CH

Inventors

Anton Alt · Schaffhausen, CH
Peter Toelke · Diessenhofen, CH
Ludwig Wilhelm · Engen, DE
Urban Zimmermann · Waldshut-Tiengen, DE

Key dates

Filing date	Sep 25, 1989
Grant date	Feb 25, 1992
Priority date	—
Expiry date	Sep 25, 2009

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/06
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method of flash butt welding high-carbon materials, in particular nodular cast iron wherein the arcing craters produced by intermitting contact of the contact faces have a maximum roughness depth R.sub.T such that this roughness depth lies within the narrowest thickness of the plasticized zone. As a result, when the upsetting pressure is applied, the entire molten material areas on the contact faces are pressed out of the contact faces into the welding bead thereby prohibiting the creation of hardening structures, such as, for example, ledeburite in the welding zone. The method is especially suitable for flash butt welding workpieces having wall thicknesses of over 12 mm.

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