EP 0079864 B1 19871125 - PROCESS FOR HIGH-TEMPERATURE CARBURIZING TREATMENT OF TRACK BUSHES FOR TRACTORS OR TRACKED VEHICLES, WITH CARBURIZING ATMOSPHERE PRODUCED IN SITU, DIRECT QUENCHING, ANNEALING AT ENDS AND TOTAL STRESS RELIEVING
Title (en)
PROCESS FOR HIGH-TEMPERATURE CARBURIZING TREATMENT OF TRACK BUSHES FOR TRACTORS OR TRACKED VEHICLES, WITH CARBURIZING ATMOSPHERE PRODUCED IN SITU, DIRECT QUENCHING, ANNEALING AT ENDS AND TOTAL STRESS RELIEVING
Publication
Application
Priority
IT 4955281 A 19811023
Abstract (en)
[origin: EP0079864A1] The invention refers to a process for the production of track bushes for tractors and tracked vehicles in general, said bushes being carburized in semicontinuous furnaces, with preheating chamber and extraction chamber, in which the carburizing atmosphere is obtained directly in situ, and then individually submitted to direct quenching, followed by tempering of the ends and total stress-relieving. The production cycle calls for tight control of temperatures and of treatment times as well as of the composition of the carburizing atmosphere; on the other hand it ensures a big saving in energy, shorter treatment times and consistently high product quality.
IPC 1-7
IPC 8 full level
C21D 1/78 (2006.01); C21D 9/14 (2006.01); C23C 8/80 (2006.01)
CPC (source: EP)
C21D 1/78 (2013.01); C21D 9/14 (2013.01); C23C 8/80 (2013.01)
Citation (examination)
Industrial Heating, september 1984, pages 22-23
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0079864 A1 19830525; EP 0079864 B1 19871125; BR 8206000 A 19830913; DE 3277732 D1 19880107; IT 1171606 B 19870610; IT 8149552 A0 19811023
DOCDB simple family (application)
EP 82830210 A 19820721; BR 8206000 A 19821014; DE 3277732 T 19820721; IT 4955281 A 19811023