EP 0191873 A1 19860827 - Method and steel alloy for producing high-strength hot forgings.
Title (en)
Method and steel alloy for producing high-strength hot forgings.
Title (de)
Verfahren und legierter Stahl zum Herstellen hochfester Schmiedestücke.
Title (fr)
Procédé et acier allié pour la fabrication d'une pièce de forge à résistance élevée.
Publication
Application
Priority
EP 85101721 A 19850216
Abstract (en)
This invention concerns a method and a steel alloy for producing high-strength hot forgings, the forging billet being cold-sheared from cast or hot-rolled steel and the finished forging being immediately quenched from the forging temperature, machined and used without tempering. The forgings can also be assembled by fusion welding a number of parts together. For manufacturing the forging, a steel is used with the following composition: <IMAGE> the remainder being iron and the usual impurities. The tensile strength of the forgings when quenched and without tempering is at least 900 N/mm<2>, 0.2-proof stress at least 700 N/mm<2> and the impact toughness at room temperature is at least 25 J measured on a V-notched impact test-piece. The hardness of steel, when air cooled, is at most 225 HB.
IPC 1-7
IPC 8 full level
C21D 1/02 (2006.01); C22C 38/18 (2006.01)
CPC (source: EP)
C21D 1/02 (2013.01); C22C 38/18 (2013.01)
Citation (search report)
- [Y] DE 927213 C 19550502 - OBERHUETTEN VEREINIGTE OBERSCH
- [AD] EP 0052308 A1 19820526 - THYSSEN INDUSTRIE [DE]
- [A] EP 0072867 A1 19830302 - KAWASAKI STEEL CO [JP]
- [A] DE 1033692 B 19580710 - BOEHLER & CO AG GEB
- [A] DE 749477 C 19530323 - EDELSTAHLWERKE A G KREFELD DEU, et al
- [Y] VEREIN DEUTSCHER EISENHÜTTENLEUTE "Werkstoff-Handbuch Stahl und Eisen" 2nd edition 1940, VERLAG STAHLEISEN MBH, Düsseldorf pages H19-1-H19-5
- [A] VDI-Z, vol. 122, no. 17, September 1980, Düsseldorf; S. ENGINEER "Entwicklungen auf dem Gebiet der Stähle für Gesenkschmiedestücke", pages 705-711
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0191873 A1 19860827; EP 0191873 B1 19890628; AT E44290 T1 19890715; DE 3571254 D1 19890803
DOCDB simple family (application)
EP 85101721 A 19850216; AT 85101721 T 19850216; DE 3571254 T 19850216