A system and method for an improved material flow through an extrusion machine by altering the material properties in a magnetic field are provided. The electromagnetic extrusion system includes a ram that is moved into a chamber containing an extrusion material to force the extrusion material out of an opening defined, at least in part, by a die to create an extrusion with a cross-sectional shape corresponding to the predetermined shape of the opening. An electromagnetic winding of electrically conductive material is embedded within a tool retainer block surrounding the container and is helically wound about the chamber and carries a DC electrical current to generate a magnetic field having a magnetic flux density of at least 2 Tesla within the extrusion material to dissipate dislocation defect structures in the extrusion material being extruded via the magnetoplasticity effect. The magnetic field therefore provides for reduced flow stress on the tooling.

The invention relates to a method for manufacturing an aluminum alloy product including the steps of: creating a bath of liquid metal in an aluminum-copper-lithium alloy, casting said alloy by vertical semi-continuous casting so as to obtain a plate with thickness T and width W such that, during solidification, the hydrogen content of said liquid metal bath (1) is lower than 0.4 ml/100 g, the oxygen content above the liquid surface (14, 15) is less than 0.5% by volume.

An extrusion press for extrusion of a material to be pressed through a die has a recipient that holds the material to be pressed, and a module that can be displaced relative to the die. The module can be acted on, during extrusion, by an electric motor drive, with the force required for extrusion. The electric motor drive is connected to the module that is displaceable relative to the die, by a bearing unit that has play perpendicular to the force; and/or during extrusion, drives contraction devices for contraction of a region of a tension element that stands under tension, which element counters the force required for extrusion by tension, and/or is a linear drive, which displaces a module that is fixed in place relative to the die during extrusion and the module that is displaceable relative to the die during extrusion, relative to one another, during extrusion.

The invention relates to a tool unit (12) for an extrusion machine (1) with a scraping element (51), a tool element (49) with an expanding channel (50) receiving the scraped extrusion material (3) and a die (53). The tool unit (12) includes a receiving cage (42) with first and second receiving cage parts (43, 44). In the first receiving cage part (43) there is a tool element (49) inserted in a receiving channel (48). In the second receiving cage part (44) a receiving chamber (52) facing the first receiving cage part (43) is formed, in which at least the die (53) is received and supported by a support surface (56). In the tool element (49) as well as in the first receiving cage part (43) a common receiving groove (62) is formed with at least one groove base surface (63, 64), in which the scraping element (51) is inserted loosely and is supported. The invention also relates to an extrusion machine (1) as well as to a method for changing the friction wheel (4).

An Ni-based super heat resistant alloy extruded material manufacturing method includes: (1) obtaining an ingot by casting molten metal having a component composition of a precipitation-strengthened Ni-based super heat resistant alloy wherein the equilibrium precipitation amount of gamma prime at 700 C. is at least 40 mol % and using it as a billet, wherein the billet is heated to a hot working temperature that is at least 1030 C. and is less than the gamma prime solvus temperature of the alloy; and (2) inserting the billet that has been heated to the hot working temperature into a container, imparting a compressive force to the billet from one end side of the container, and extruding the billet at an extrusion rate of 10 to 300 mm/s from a hole in a die placed at the other end side of the container, to yield an Ni-based super heat resistant alloy extruded material.

An electric powered extrusion press pushes an extrusion stem by extrusion force generated by an electric powered drive device so that pressure is applied to a billet and a predetermined product is extruded through a die, wherein the electric powered drive device is provided with one or more freely rotatable wire drums, an electric powered extrusion-use main motor makes the wire drums rotate wind up wires and thereby give a thrust to movable pulleys in the extrusion direction so that a crosshead and extrusion stem are driven to advance through an extrusion movement part.

An electric powered extrusion press pushes an extrusion stem by extrusion force generated by an electric powered drive device so that pressure is applied to a billet and a predetermined product is extruded through a die, wherein the electric powered drive device is provided with one or more freely rotatable wire drums, an electric powered extrusion-use main motor makes the wire drums rotate wind up wires and thereby give a thrust to movable pulleys in the extrusion direction so that a crosshead and extrusion stem are driven to advance through an extrusion movement part.

A dummy block for a metal extrusion press includes: a generally cylindrical base having a forward surface and an outwardly extending circumferential flange; an expandable collar coupled to the base, the collar having an inwardly extending circumferential rib abutting the circumferential flange; a plunger disc seated against the forward surface of the base and accommodated by the collar, and a plunger shaft extending through the plunger disc and coupled to the base.

The present disclosure provides methods for preparing an extruded product from a solid billet. The methods can include providing an as-cast billet for extrusion; applying a simultaneous rotational shear and axial extrusion force to the as-cast billet to plasticize the as-cast billet; and extruding the plasticized as-cast billet with an extrusion die to form an extruded product. Methods for preparing extruded products from billets can also include: providing a billet for extrusion; while maintaining a majority of the billet below 100? C., applying a simultaneous rotational shear and axial extrusion force to one end of the billet to plasticize the one end of the billet; and extruding the plasticized one end of the billet with an extrusion die to form an extruded product. Methods for preparing an extruded product from a billet can also include providing a billet for extrusion; applying a simultaneous rotational shear and axial extrusion force to the billet to plasticize the billet; extruding the plasticized billet with an extrusion die to form an extruded product; and artificially aging the extruded product for less than the ASTM recommended amount of time.

There is described an extrusion press (1) of a metal billet, comprising a die (3), a punch (2) able to push the billet through the die (3), and a container (4) of the billet upstream of the die (3). Said extrusion press (1) further comprises a screw (5) with which the punch (2) is integral, able to engage a nut screw (6) provided in the extrusion press (1). At least one electric motor (7) drives the reciprocal movement of the screw (5) and nut screw (6), thus causing the translation of the punch (2) in the extrusion direction.