Patent · US Expired

Method for heat treatment of material to be worked on, especially of aluminium or magnesium alloys

US3953247A · kind A · utility

9Cited by

2References

12Claims

0Family size

Assignees

Prolizenz Aktiengesellschaft · CH
Friedrich W. Elhaus · CH

Inventors

Friedrich W. Elhaus · Radolfzell, DE
Bernhard Hilge · Mettmenstetten, CH

Key dates

Filing date	Nov 20, 1973
Grant date	Apr 27, 1976
Priority date	—
Expiry date	Nov 20, 1993

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF27M2001/1552
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

For heat treatment metal pieces like billets, ingots, bars and the like are pre-heated by direct flame impingement in a pre-heating furnace and then transfered into a holding furnace with forced hot gas circulation where they are held for the time required at the desired heat treatment temperature.

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