EP 0105368 A4 19840703 - METHOD OF HOT-FORMING METALS PRONE TO CRACK DURING ROLLING.
Title (en)
METHOD OF HOT-FORMING METALS PRONE TO CRACK DURING ROLLING.
Title (de)
VERFAHREN ZUR WARMVERFORMUNG VON METALLEN, DIE BEIM WALZEN RISSANFÄLLIG SIND.
Title (fr)
PROCEDE DE FORMAGE A CHAUD DE METAUX SUSCEPTIBLES DE SE FISSURER PENDANT LE LAMINAGE.
Publication
Application
Priority
US 34588582 A 19820204
Abstract (en)
[origin: WO8302783A1] A method of continuously casting a molten ferrous alloy in a casting means (12) to obtain a solidified cast bar (20) at a hot-forming temperature, passing the cast bar (20) at a hot-forming temperature from the casting means (12) to a hot-forming means (10), and hot forming the cast bar into a wrought product by a two-stagereduction of its cross-sectional area while it is still at a hot-forming temperature, including, in the first stage, the step of forming a substantially uniform fine grained, equiaxed or cell structure in the outer surface layers of the cast bar by a selected small amount of deformation of the cast bar in its as-cast condition prior to the second stage in which substantial reduction of its cross-sectional area forms the wrought product. The substantially uniform subgrain structure formed on the cast bar during the first stage of deformation produces a bar that has increased ductility compared to bar produced by the prior art processes and permits substantial reduction of the cross-sectional area of the cast bar during the second stage of deformation without the cast bar cracking, even when the cast bar has a relatively high percentage of alloying elements present.
IPC 1-7
IPC 8 full level
B21B 1/46 (2006.01); B22D 11/12 (2006.01); C21D 7/13 (2006.01); B21B 3/00 (2006.01)
CPC (source: EP)
B21B 1/463 (2013.01); B22D 11/1206 (2013.01); C21D 7/13 (2013.01); B21B 3/003 (2013.01)
Citation (search report)
- [X] DE 2019700 A1 19701119 - VOEST AG
- [Y] GB 2014071 A 19790822 - NIPPON KOKAN KK
- [Y] FR 2461010 A1 19810130 - DORYOKURO KAKUNENRYO [JP]
- [Y] GB 1596395 A 19810826 - JERNKONTORET FORSKNINGSAVDELNI
- [A] FR 2223114 A1 19741025 - NIPPON KOKAN KK [JP]
Designated contracting state (EPC)
BE
DOCDB simple family (publication)
WO 8302783 A1 19830818; EP 0105368 A1 19840418; EP 0105368 A4 19840703; EP 0105368 B1 19880601; GB 2124939 A 19840229; GB 2124939 B 19860205; GB 8326523 D0 19831102
DOCDB simple family (application)
US 8300194 W 19830204; EP 83902518 A 19830204; GB 8326523 A 19830204