Abstract:
Provided are precipitation hardened high strength nickel based alloy welds that yield improved properties and performance in joining high strength metals. The advantageous weldments include two or more segments of ferrous or non- ferrous components, and fusion welds, friction stir welds, electron beam welds, laser beam welds, or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a precipitation hardened nickel based alloy weld metal composition including greater than or equal to 1.4 wt% of combined aluminum and titanium based on the total weight of the nickel based alloy weld metal composition. Also provided are methods for forming the welds from the nickel based alloy weld compositions, wherein the precipitation hardening occurs in the as-welded condition. The nickel based welds do not require a separate heat treatment step after welding to produce advantageous strength properties.
Abstract:
A method of selecting a geometry for a friction stirring tool, said tool having a melting point that is higher than the workpiece material, wherein the tool is placed in motion against the workpiece to generate heat in the workpiece such that workpiece material is transported in surface features of the tool, and wherein surface features manage workpiece material flow around the tool, and wherein the tool can be used in friction stir processing, friction stir mixing, friction stir welding, and friction stir spot welding of high melting temperature materials or high softening temperature materials.
Abstract:
This invention relates to a method of bonding a metallic membrane with metallic part involving pressing a smooth surface of the metallic membrane against the smooth surface of the metallic part, and heating the metallic membrane and metallic part to a temperature above the half melting point of the metallic membrane while subjecting the metallic membrane and metallic part to a controlled environment of a proper gas atmosphere. The metallic membrane can comprise palladium and the pressurized gas can comprise one of hydrogen, an inert gas or their mixture.
Abstract:
Die bekannten, durch ein IHU-Verfahren hergestellten Nockenwellen, deren Nockenringe (1) auf einer Hohlwelle kraft- und formschlüssig befestigt sind, and dabei die Nockenringe in einem getrennten Verfahren funktionsgerecht hergestellt sind, haben den Nachteil, dass durch die Verformung des Nockenringes, vor allem im Bereich (2) der Nockenspitze, Rissbildungen oder Brüche auftreten können. Erfindungsgemäß wird der Nockenring in seinen Materialeigenschaften derart hergestellt, das in seinem äußeren Bereich (3) über eine definierte Dicke das Material hart and elastisch, jedoch nur geringfügig plastisch verformbar ist, und der darunter liegende Bereich relativ weich und plastisch verformbar ist. Die Nockenwellen finden fast ausschliesslich in Fahrzeugmotoren Anwendung.