EP 0141761 A3 19850612 - DIFFERENTIAL QUENCHING PROCESS FOR REDUCING THE DEFORMATION OF FLAT METAL PRODUCTS
Title (en)
DIFFERENTIAL QUENCHING PROCESS FOR REDUCING THE DEFORMATION OF FLAT METAL PRODUCTS
Publication
Application
Priority
FR 8315823 A 19830929
Abstract (en)
[origin: ES8505731A1] The invention concerns a method for minimizing deformation during rapid cooling of flat metallurigcal products such as sheets, strips, flattened portions, wide sections and the like. The method comprises rapidly cooling the product by means of a fluid (or mixtures of fluids) at temperature TF, comprising at least one vaporizable liquid, with modulation in a direction perpendicular to the direction of advance of the product, so as to impart different cooling speeds to the edges and the axis (case I) or to one edge and the other (case II). The technique may be completed by careful masking of the cooling in the zone for the rapid cooling action, or by controlled precooling prior to said rapid cooling. The method makes it possible to obtain the rapid cooling which is necessary e.g. in quenching operations, while at the same time minimizing the deformations or the internal stress level of flat products.
IPC 1-7
IPC 8 full level
B21B 45/02 (2006.01); C21D 1/00 (2006.01); C21D 1/667 (2006.01); C21D 9/52 (2006.01); C21D 9/573 (2006.01); C22F 1/04 (2006.01)
CPC (source: EP KR US)
C21D 9/573 (2013.01 - EP US); C22C 1/04 (2013.01 - KR); C22F 1/04 (2013.01 - EP US)
Citation (search report)
- [Y] FR 2100227 A5 19720317 - NIPPON KOKAN KK
- [Y] EP 0069618 A1 19830112 - USINOR [FR]
- [Y] DE 890804 C 19530921 - WESTFALENHUETTE DORTMUND AG
- [A] FR 2222149 A1 19741018 - NIPPON KOKAN KK [JP]
- [A] WO 8300880 A1 19830317 - NIPPON STEEL CORP [JP]
- [A] GB 1081954 A 19670906 - YAWATA IRON & STEEL CO
Designated contracting state (EPC)
AT BE CH DE GB IT LI NL SE
DOCDB simple family (publication)
EP 0141761 A2 19850515; EP 0141761 A3 19850612; EP 0141761 B1 19870722; AT E28479 T1 19870815; CA 1220699 A 19870421; DE 3464935 D1 19870827; ES 536247 A0 19850601; ES 8505731 A1 19850601; FR 2552780 A1 19850405; FR 2552780 B1 19880304; JP S6092420 A 19850524; KR 850002107 A 19850506; SU 1314950 A3 19870530; US 4610735 A 19860909
DOCDB simple family (application)
EP 84420162 A 19840927; AT 84420162 T 19840927; CA 464329 A 19840928; DE 3464935 T 19840927; ES 536247 A 19840926; FR 8315823 A 19830929; JP 20391984 A 19840928; KR 840006056 A 19840929; SU 3794609 A 19840928; US 65554684 A 19840928