EP 0362122 B1 19930331 - METHOD OF HEAT-STRAIGHTENING STEEL TUBES
Title (en)
METHOD OF HEAT-STRAIGHTENING STEEL TUBES
Publication
Application
Priority
DE 3833163 A 19880927
Abstract (en)
[origin: EP0362122A1] The invention relates to a method of heat-straightening extended steel rolling stock in a roller straightening machine, in which method the rolling stock has a temperature below Ar1 or Ac1 and of at least 300 DEG C and is cooled down to room temperature after the straightening. In order to improve the mechanical-technological properties, it is proposed according to the invention that the rolling stock, accelerated immediately after reaching the required geometry, be cooled down at least to such a temperature at which distortion due to cooling stresses no longer occurs as a result of further cooling.
IPC 1-7
IPC 8 full level
B21D 3/00 (2006.01)
CPC (source: EP)
B21D 3/00 (2013.01)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0362122 A1 19900404; EP 0362122 B1 19930331; AT E87515 T1 19930415; DE 58903947 D1 19930506; ES 2039933 T3 19931001
DOCDB simple family (application)
EP 89730188 A 19890816; AT 89730188 T 19890816; DE 58903947 T 19890816; ES 89730188 T 19890816