Patent classifications
C22C21/08
Manufacturing process for obtaining high strength extruded products made from 6xxx aluminium alloys
A manufacturing process for obtaining extruded products made from a 6xxx aluminium alloy, wherein the said manufacturing process comprises following steps: a) homogenizing a billet cast from said aluminium alloy; b) heating the said homogenised cast billet; c) extruding the said billet through a die to form at least a solid or hollow extruded product; d) quenching the extruded product down to room temperature; e) optionally stretching the extruded product to obtain a plastic deformation typically between 0.5% and 5%; f) ageing the extruded product without applying on the extruded product any separate post-extrusion solution heat treatment between steps d) and f). characterised in that: i) the heating step b) is a solution heat treatment where: b1) the cast billet is heated to a temperature between Ts-15° C. and Ts, wherein Ts is the solidus temperature of the said aluminium alloy; b2) the billet is cooled until billet mean temperature reaches a value between 400° C. and 480° C. while ensuring billet surface never goes below a temperature substantially close to 400° C.; ii) the billet thus cooled is immediately extruded (step c)), i.e. a few tens seconds after the end of step b2).
Aluminum alloy brazing sheets for fluxless brazing
New aluminum alloy brazing sheets are disclosed. The new aluminum alloy brazing sheets may include a core, an interliner layer adjacent the core, and a braze liner adjacent the interliner layer. The interliner layer may include a first aluminum alloy having at least 0.35 wt. % Si and from 0.05 to 2.0 wt. % Mg. The braze liner may include a second aluminum alloy having 0.05 to 2.0 wt. % Mg. The first aluminum alloy and the second aluminum alloy may include an amount of magnesium sufficient to achieve T.sub.solidus(IL)≥5° C. T.sub.liquidus(BL). The new aluminum alloy brazing products may be useful, for instance, in fluxfree brazing.
Aluminum alloy brazing sheets for fluxless brazing
New aluminum alloy brazing sheets are disclosed. The new aluminum alloy brazing sheets may include a core, an interliner layer adjacent the core, and a braze liner adjacent the interliner layer. The interliner layer may include a first aluminum alloy having at least 0.35 wt. % Si and from 0.05 to 2.0 wt. % Mg. The braze liner may include a second aluminum alloy having 0.05 to 2.0 wt. % Mg. The first aluminum alloy and the second aluminum alloy may include an amount of magnesium sufficient to achieve T.sub.solidus(IL)≥5° C. T.sub.liquidus(BL). The new aluminum alloy brazing products may be useful, for instance, in fluxfree brazing.
AL-MG-SI BASED NEAR-EUTECTIC ALLOY COMPOSITION FOR HIGH STRENGTH AND STIFFNESS APPLICATIONS
Alloy materials and three-dimensional (3-D) printed alloys are disclosed. An alloy in accordance with an aspect of the present disclosure comprises aluminum, magnesium, and silicon wherein a composition of the alloy comprises from at least 5 percent (%) by weight to 20% by weight of silicon and from at least 7% by weight to 10% by weight of magnesium.
AL-MG-SI BASED NEAR-EUTECTIC ALLOY COMPOSITION FOR HIGH STRENGTH AND STIFFNESS APPLICATIONS
Alloy materials and three-dimensional (3-D) printed alloys are disclosed. An alloy in accordance with an aspect of the present disclosure comprises aluminum, magnesium, and silicon wherein a composition of the alloy comprises from at least 5 percent (%) by weight to 20% by weight of silicon and from at least 7% by weight to 10% by weight of magnesium.
Flat steel product with an AI-coating, method for producing the same, steel component and method for producing the same
A flat steel product for hot forming may be produced from a steel substrate that includes a steel comprising 0.1-3% by weight Mn and up to 0.01% by weight B, along with a protective coating that is applied to the steel substrate. The protective coating may be based on Al and may contain up to 20% by weight of other alloy elements. Also disclosed are methods for producing such flat steel products, steel components, and methods for producing steel components. Absorption of hydrogen is minimized during heating necessary for hot forming. This is achieved at least in part through an alloy constituent of 0.1-0.5% by weight of at least one alkaline earth or transition metal in the protective coating, wherein an oxide of the alkaline earth or transition metal is formed on an outer surface of the protective coating during hot forming of the flat steel product.
Flat steel product with an AI-coating, method for producing the same, steel component and method for producing the same
A flat steel product for hot forming may be produced from a steel substrate that includes a steel comprising 0.1-3% by weight Mn and up to 0.01% by weight B, along with a protective coating that is applied to the steel substrate. The protective coating may be based on Al and may contain up to 20% by weight of other alloy elements. Also disclosed are methods for producing such flat steel products, steel components, and methods for producing steel components. Absorption of hydrogen is minimized during heating necessary for hot forming. This is achieved at least in part through an alloy constituent of 0.1-0.5% by weight of at least one alkaline earth or transition metal in the protective coating, wherein an oxide of the alkaline earth or transition metal is formed on an outer surface of the protective coating during hot forming of the flat steel product.
High strength 7XXX series aluminum alloys and methods of making the same
Described herein are 7xxx series aluminum alloys with unexpected properties and novel methods of producing such aluminum alloys. The aluminum alloys exhibit high strength and are highly formable. The alloys are produced by continuous casting and can be hot rolled to a final gauge and/or a final temper. The alloys can be used in automotive, transportation, industrial, and electronics applications, just to name a few.
ALUMINUM BASED NANOGALVANIC COMPOSITIONS USrEFUL FOR GENERATING HYDROGEN GAS AND LOW TEMPERATURE PROCESSING THEREOF
Alloys comprised of a refined microstructure, ultrafine or nano scaled, that when reacted with water or any liquid containing water will spontaneously and rapidly produce hydrogen at ambient or elevated temperature are described. These metals, termed here as aluminum based nanogalvanic alloys will have applications that include but are not limited to energy generation on demand. The alloys may be composed of primarily aluminum and other metals e.g., tin bismuth, indium, gallium, lead, etc. and/or carbon, and mixtures and alloys thereof. The alloys may be processed by ball milling for the purpose of synthesizing powder feed stocks, in which each powder particle will have the above-mentioned characteristics. These powders can be used in their inherent form or consolidated using commercially available techniques for the purpose of manufacturing useful functional components.
Aluminium extrusion alloy suitable for etched and anodized components
Aluminium alloys suitable for etched and anodized components, in particular aluminum extrusion alloys of the types containing Magnesium and Silicon, which after being extruded to any wide variety of forms for different applications such as house buildings and other building applications is subjected to etching in a conventional alkaline etching bath and subsequent anodizing, wherein the relation between Cu and Zn is controlled to avoid preferential grain etching and the ratio of Cu/Zn is below 1.