EP 0552479 B1 19961002 - Process for improving the flexibility of cuprous semi-finished products
Title (en)
Process for improving the flexibility of cuprous semi-finished products
Title (de)
Verfahren zur Verbesserung der Biegewechselfestigkeit von Halbzeug aus Kupferlegierungen
Title (fr)
Procédé pour améliorer la flexibilité de demi-produits en alliage de cuivre
Publication
Application
Priority
DE 4201065 A 19920117
Abstract (en)
[origin: EP0552479A1] The invention relates to a process for improving the fatigue strength under reversed bending stresses of semi-finished copper alloy products. In this case, the copper alloy is melted, a preform is produced and the end form is obtained from the preform by usual steps of hot- and cold-forming. In order to improve the fatigue strength under reversed bending stresses as compared with conventionally manufactured semi-finished products, it is proposed according to the invention that the preform is produced by the process of spray-compacting and that a copper alloy is used which contains nitride-forming elements (such as, for example, zirconium, titanium, magnesium, chromium, aluminium, manganese, boron, niobium, tantalum, vanadium) individually or in combination in a concentration range of from 0.001 to 3.0% in total.
IPC 1-7
IPC 8 full level
B22D 23/00 (2006.01); B22F 3/115 (2006.01); C22C 1/10 (2006.01); C22C 9/00 (2006.01); C22F 1/08 (2006.01); C23C 4/12 (2006.01); C23C 4/123 (2016.01)
CPC (source: EP)
C22F 1/08 (2013.01); C23C 4/123 (2016.01)
Designated contracting state (EPC)
CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0552479 A1 19930728; EP 0552479 B1 19961002; AU 3118793 A 19930722; AU 663143 B2 19950928; DE 4201065 A1 19930722; DE 4201065 C2 19941208; DE 59207289 D1 19961107; FI 104640 B 20000315; FI 930161 A0 19930115; FI 930161 A 19930718; JP 3479919 B2 20031215; JP H07166264 A 19950627
DOCDB simple family (application)
EP 92121734 A 19921221; AU 3118793 A 19930114; DE 4201065 A 19920117; DE 59207289 T 19921221; FI 930161 A 19930115; JP 1966493 A 19930112