219 results about "High strength aluminium" patented technology

The present invention a high strength aluminium alloy brazing sheet, comprising an Al—Zn core layer and at least one clad layer, the core layer including the following composition (in weight percent):Zn1.2 to 5.5Mg0.8 to 3.0Mn0.1 to 1.0Cu<0.2Si <0.35Fe<0.5optionally one or more of:Zr<0.3Cr<0.3V<0.3Ti<0.2Hf<0.3Sc<0.5,the balance aluminium and incidental elements and impurities. The clad layer includes an Al—Si based filler alloy and is applied on at least one side of the core layer. The invention relates furthermore to a brazed assembly including such brazing sheet, to the use of such brazing sheet and to method for producing an aluminium alloy brazing sheet.

(a) The metal matrix composite is suitable for the manufacture of flat or shaped titanium aluminide, zirconium aluminide, or niobium aluminide articles and layered metal composites having improved mechanical properties such as lightweight plates and sheets for aircraft and automotive applications, thin cross-section vanes and airfoils, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and doors, as well as sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. The composite material consists of a metal (e.g., Ti, Zr, or Nb-based alloy) matrix at least partially intercalated with a three-dimensional skeletal metal aluminide structure, whereby ductility of the matrix metal is higher than that of the metal aluminide skeleton. The method for manufacturing includes the following steps: (a) providing an aluminum skeleton structure having open porosity of 50-95 vol. %, (b) filling said skeleton structure with the powder of a reactive matrix metal, (c) compacting the aluminum skeleton / matrix powder composite preform by cold rolling, cold die pressing, cold isostatic pressing, and / or hot rolling, (d) consolidating the initial or compacted composite preform by sintering, hot pressing, hot rolling, hot isostatic pressing, and / or hot extrusion to provide, at least partially, a reaction between aluminum skeleton and matrix metal powder, and (e) diffusion annealing followed by any type of heat treatment needed to provide predetermined mechanical and surface properties of the resulting metal matrix composite. The combination of ductile matrix and metal aluminide skeletal structure results in significant improvement of mechanical properties of the composite material, especially hot strength. This high-strength aluminide-based material can also be used as a core component in multilayer metal matrix composites.

The invention relates to a high strength automobile aluminium alloy wheel rim, in particular to an automobile wheel rim matched with oversize vehicles. The high strength automobile aluminium alloy wheel rim is made of high strength aluminium alloy material which comprises main chemical elements with the mass percent: 0.4-0.8% of Si, 0.8-1.2% of Mg, 0.16-0.22% of Ti, 0.2-0.3% of Zn, 0.6-0.8% of Fe,0.15-0.4% of Cu, 0.04-0.35% of Cr, 0.1-0.2% of Mn, 0.02-0.03% of Sb, 0.02-0.03% of Sr and the rest of Al. The automobile aluminium alloy wheel rim has high tensile strength which is 10% higher than that of the existing aluminium alloy wheel rim produced by 6061-T6, is good in mechanical property, enhances the rotatable performance of alloy when the structure is refined, and has the advantages ofwide application scope, low production cost and easy popularization and use.

Disclosed is a high strength aluminium alloy brazing sheet, including an Al—Cu core layer and at least one clad layer, the core layer having the following composition (in weight percent): Cu: 1.2-4.0, Mn: 0.06-1.5, Mg: 0.06-1.5, Si: up to 0.5, Zn: ≦0.4, Zr: ≦0.25, Fe: ≦0.5, Ti: ≦0.25, Cr: ≦0.25; V≦0.25; the balance substantially aluminium and impurities, the clad layer including an Al—Si based filler alloy and being applied on at least one side of the core layer. Also disclosed is a brazed assembly including the brazing sheet and the use of the brazing sheet for a brazing application such as a heat exchanger.

The present invention relates to aluminum alloy material, and is especially one kind of directly extrusion cast high strength aluminum alloy. The aluminum alloy consists of Cu 4.0-5.0 wt%, Mg 1.0-2.0 wt%, Mn 0.4-0.8 wt%, trace alloy elements including Ti 0.05-0.25 wt%, B 0.01-0.05 wt%, V 0.05-0.20 wt% and Zr 0.05-0.20 wt%, and mixed RE 0.05-0.15 wt% except Al and inevitable impurities, including Fe less than 0.2 wt% and Si less than 0.1 wt%. The aluminum alloy is prepared through direct extrusion casting, quenching and perfect artificially ageing process, has the features of capacity of being heat treated to reinforce, high strength, low cost, etc, and is suitable for use in making heavy bearing aluminum alloy structures.

The invention provides a high-strength aluminum alloy plate which is suitable for use as structural materials such as ones for domestic electrical appliances and exterior automotive sheets and combines excellent unsusceptibility to surface roughening and formability; and a process for producing the plate. The high-strength aluminum alloy plate has a chemical composition containing 2.0-3.3 mass% Mg, 0.1-0.5 mass% Mn, and 0.2-1.0 mass% Fe, the remainder being unavoidable impurities and Al and the unavoidable impurities containing less than 0.20 mass% Si. In the plate, intermetallic compounds have an average diameter in terms of equivalent-circle diameter of 1 mum or smaller and an areal proportion of 1.2% or higher, recrystallized grains have an average grain diameter of 10 mum or smaller, and the tensile strength is 220 MPa or higher. An aluminum alloy melt having the chemical composition is poured into a twin-belt casting machine to continuously produce, by casting, a thin slab having a thickness of 6-15 mm at a cooling rate of 50-200 DEG C / sec as measured in a position corresponding to 1 / 4 the slab thickness. The cast is wound into a coil and then cold-rolled at a cold rolling reduction of 60-98%. The resultant plate is subjected to final annealing with a continuous annealing furnace in which the plate is heated at a rate of 100 DEG C / min or higher and held at a temperature of 400-520 DEG C for a period of 5 minutes or shorter to produce the high-strength aluminum alloy plate.