Global Patent Index - EP 1683882 A1

EP 1683882 A1 20060726 - Aluminium alloy with low quench sensitivity and process for the manufacture of a semi-finished product of this alloy

Title (en)

Aluminium alloy with low quench sensitivity and process for the manufacture of a semi-finished product of this alloy

Title (de)

Abschreckunempfindliche Aluminiumlegierung sowie Verfahren zum Herstellen eines Halbzeuges aus dieser Legierung

Title (fr)

Alliage d'Aluminium avec sensitivité à la trempe réduite et procédé de fabrication d'un produit demi-final lors de cet alliage

Publication

EP 1683882 A1 20060726 (DE)

Application

EP 05111026 A 20051121

Priority

DE 102005002390 A 20050119

Abstract (en)

An aluminum alloy for production of high-strength forged pieces that are low in inherent tension, and high-strength extruded and rolled products, comprises 7.0-10.5 wt.% zinc (Zn); 1-2.5 wt.% magnesium (Mg); 0.1-1.15 wt.% copper (Cu); 0.06-0.25 wt.% zirconium; 0.02-0.15 wt.% titanium; =0.5 wt.% manganese; =0.6 wt.% silver; =0.10 wt.% silicon; =0.10 wt.% iron; =0.04 wt.% chrome; hafnium, scandium, strontium and/or vanadium at =1 wt.%. An aluminum alloy for production of high-strength forged pieces that are low in inherent tension, and high-strength extruded and rolled products, comprises 7.0-10.5 wt.% zinc (Zn); 1-2.5 wt.% magnesium (Mg); 0.1-1.15 wt.% copper (Cu); 0.06-0.25 wt.% zirconium (Zr); 0.02-0.15 wt.% titanium (Ti); =0.5 wt.% manganese (Mn); =0.6 wt.% silver (Ag); =0.10 wt.% silicon (Si); =0.10 wt.% iron (Fe); =0.04 wt.% chrome; hafnium (Hf), scandium (Sc), strontium (Sr) and/or vanadium (V) with a summary content of =1 wt.%, and contaminants at proportions of =0.05 wt.% per element with a total contaminant proportion of =0.15 wt.%. A remaining amount by wt.% is aluminum (Al); and a sum of the alloy elements Zn, Mg and Cu is >=9 wt.%. An independent claim is also included for a method for the production of a high-strength semifinished product low in inherent tension, up to greater thickness values, comprising providing an aluminum alloy; hot forming homogenized bars via forging, extrusion and/or rolling, at 350-440[deg]C; solution heat treating the hot-formed semi-finished product at a temperature sufficiently high to bring the alloy elements necessary for hardening into solution uniformly distributed in the structure; quenching the solution heat treated semi-finished products in a quenching medium comprising water, in a water/glycol mixture, or in a salt mixture at 100-170[deg]C; cold forming the quenched semi-finished product to reduce a set of inherent tensions that occurred during quenching in the quenching medium; and artificial aging the quenched semi-finished product, in at least one stage, where a heating rate, holding time, and temperature is adjusted for optimization of the properties.

IPC 8 full level

C22C 21/10 (2006.01); C22F 1/053 (2006.01)

CPC (source: EP US)

C22C 1/06 (2013.01 - EP US); C22C 21/10 (2013.01 - EP US); C22F 1/002 (2013.01 - EP US); C22F 1/053 (2013.01 - EP US); Y10T 428/12 (2015.01 - EP US)

Citation (search report)

  • [XY] US 4629517 A 19861216 - LIFKA BERNARD W [US], et al
  • [A] JP H08295976 A 19961112 - SHOWA ALUMINUM CORP
  • [A] EP 1241275 A1 20020918 - G PREDPR VSEROSSIISKY NII AVIA [RU], et al
  • [A] FR 2853667 A1 20041015 - CORUS ALUMINIUM WALZPROD GMBH [DE]
  • [Y] "Aluminium and Aluminium alloys", 1993, ED. J.R. DAVIS, ASM INTERNATIONAL, MATERIALS PARC, OH, XP002369750
  • [A] H.J. KOLKMAN, W.G.J. 'THART, L. SCHRA: "Quench sensitivity of airframe aluminium alloys", 1988, STRENGTH OF METALS AND ALLOYS (ICSMA 8), PROC. OF THE 8TH INTERNATIONAL CONFERENCE, PERGAMON PRESS, OXFORD, XP009062512
  • [A] G. FISCHER, F.W. LYNKER, M. MARKWORTH: "Eine abschreckunempfindliche AlZnMgCu-Legierung mit Zusätzen von Chrom, Zircon und Silber", ALUMINIUM, vol. 48, no. 6, 1972, pages 413 - 418, XP009062511 & US 2003219353 A1 20031127 - WARNER TIMOTHY [FR], et al

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family (publication)

EP 1683882 A1 20060726; EP 1683882 B1 20071017; EP 1683882 B2 20100721; DE 502005001724 D1 20071129; ES 2292075 T3 20080301; ES 2292075 T5 20101217; US 10301710 B2 20190528; US 2006157172 A1 20060720; US 2011008202 A1 20110113; US 2012202086 A1 20120809; US 2014099230 A1 20140410; US 2016010195 A1 20160114

DOCDB simple family (application)

EP 05111026 A 20051121; DE 502005001724 T 20051121; ES 05111026 T 20051121; US 201113136301 A 20110728; US 201314101036 A 20131209; US 201514861853 A 20150922; US 33481306 A 20060118; US 85975710 A 20100819