EP 2762247 A1 20140806 - FORGING METHOD FOR HIGH-EFFICIENCY CLOSING OF POROUS DEFECTS IN STEEL INGOTS OR BILLETS
Title (en)
FORGING METHOD FOR HIGH-EFFICIENCY CLOSING OF POROUS DEFECTS IN STEEL INGOTS OR BILLETS
Title (de)
SCHMIEDEVERFAHREN ZUM HOCHEFFIZIENTEN VERSCHLIESSEN PORÖSER DEFEKTE BEI STAHLBLÖCKEN ODER BARREN
Title (fr)
PROCÉDÉ DE FORGEAGE À HAUT RENDEMENT DE LA PARTIE INTERNE D'UN LINGOT D'ACIER OU D'UN FLAN PAR COALESCENCE À RETASSURES
Publication
Application
Priority
- CN 201110282883 A 20110922
- CN 201210225394 A 20120702
- CN 2012081732 W 20120921
Abstract (en)
The present invention relates to the field of forging, and more particularly to a forging method which can heal the void in ingots or billets effectively. It can be used in open die forging process of ingots and billets of all shapes. Wide anvil radial forging method is used during forging, which uses two flat plates as upper and lower anvils. For ingots or billets with height-diameter ratio less than 2, the reduction ratio during wide anvil radial forging is 20% to 25%; for ingots or billets with height-diameter ratio larger than 2, the reduction ratio is 20% to 40%. This invention can heal the voids in the ingots or billets, especially the central porosities, which cannot be done by traditional forging methods. Moreover, this invention can also heal the voids in large height-diameter ratio ingots or billets using small reduction ratio.
IPC 8 full level
B21J 5/06 (2006.01)
CPC (source: EP)
B21J 1/02 (2013.01); B21J 5/022 (2013.01); C21D 7/13 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2762247 A1 20140806; EP 2762247 A4 20150819; WO 2013041043 A1 20130328
DOCDB simple family (application)
EP 12833320 A 20120921; CN 2012081732 W 20120921