Vereinigte Edelstahlwerke Aktiengesellschaft (vew)

Vereinigte Edelstahlwerke Aktiengesellschaft

Vereinigte Edelstahlwerke (vew)

Vereinigte Edelstahlwerke Aktiengesellshaft

Alexander Kohnhauser

Bruno Hribernik

Manfred Gstettner

Kurt Haberfellner

A metallic die for extruding a metal material, preferably a material of Al or alloys thereof, and/or of nonferrous metals, particularly Cu or alloys thereof, has an essentially flat, disc-shaped die body with at least one aperture, and a second aperture segment which adjoins a first aperture segment. The first aperture segment corresponds to and gives the final form to the desired cross section of the extrusion, and the second aperture segment is at least coincident with the first in its extent transversely to the pressing direction, and is preferably everywhere wider than the first aperture segment. The die body has at least two die parts which adjoin each other at a surface which is preferably generally flat and extends transversely to the press direction. The die parts are of different metallic materials, the first die part having an aperture segment which at least covers the cross section of the entire opening which accomplishes the final forming, and the second die part has an aperture segment which generally adjoins that of the first and preferably has a release clearance. The die part having the aperture segment which produces the final form is of a material with high wear-resistance and hot strength, preferably a high alloy hot-work steel, a high speed tool steel, or a superalloy, particularly an alloy based on Co-, Ni-, or Mo, and the die part with the release clearance is comprised of a tough, nonductile, heat-resistant steel, preferably a medium alloy hot-work steel, and wherein the die parts are bonded together over the surface (23) by a pure metal-to-metal bond of the type of the metals themselves to form a single unit die body.

Extrusion press die

The weapon barrel comprises a liner and at least one jacket tube. The liner is made of a highly wear-resistant material, like a cobalt or nickel base alloy, and the jacket tube is made of a tough alloy, like steel. In the manufacturing process the liner material is packed into the jacket tube in the form of a powdery material which may be pre-pressed or pre-sintered. The packing is arranged such as to leave a central free space in the jacket tube, and the jacket tube may be surrounded by an encapsulating tube. The jacket tube or the encapsulating tube is closed either before or after evacuation, and the closed tube arrangement is subjected to a combined heat and pressure treatment at temperatures of at least 900.degree. C., but below the melting point of the relevant materials and at pressures of at least 900 bar. The compound body thus obtained is formed with a full-area metallic bond between the liner and the jacket tube. After eventual heat treatment the compound body is further machined and a rifling is worked thereinto as, for example, by forging.

Method of manufacturing a weapon barrel

Weapon barrel with metallorgically bonded wear resistant liner

A method of fabricating conveyor or feed worms, especially those used in plastic processing machines, containing a tough steel core and a high wear resistant plating. Initially, there is fabricated a compound metal blank by forging or hot rolling a substantially rod-shaped steel core provided with a snugly bearing sleeve or sheath formed of the plating material while forming a metallic bond between the core and the sleeve and while reducing the sleeve diameter by at least 20%. After soft annealing the blank there is formed therefrom the worm profile, and then there is accomplished a thermal treatment which entails hardening and tempering in order to set the hardness of the plating material as well as the core material, and finally there is accomplished the finished machining to the final dimensions.

Method for fabricating conveyor worms or the like

Method for fabricating hollow cylinders of machines

Growing community of inventors

Kapfenberg, Austria

Alexander Kohnhauser