Shear-assisted extrusion assemblies are provided. The assemblies can include a billet containing assembly containing a billet comprising a billet outer material and a billet inner material in at least one cross-section; a tool operably engaged with the billet; an extrudate receiving channel configured to receive extrudate from the tool, wherein the extrudate comprises extruded outer material and extruded inner material in at least one cross-section, the extruded outer material being the same material as the billet outer material, and the extruded inner material being the same as the billet inner material. Methods for producing multi-material shear-assisted extrudate are also provided.

A hot extrusion die for a special-shaped square pipe includes a die cavity sleeve with a special-shaped cavity. A hot extrusion mandrel is arranged in the die cavity sleeve. An area between the die cavity sleeve and the hot extrusion mandrel forms a die cavity hole. A first extrusion diversion hole and a second extrusion diversion hole are arranged below the die cavity hole. An integral centroid of the die cavity hole is located at a circle center of a radial cross section of the die cavity sleeve. Further disclosed is a hot extrusion integral forming method for a special-shaped square pipe, including: heating and expanding a blank material; heating the blank material again after expanding; performing hot extrusion on the blank material; and cooling the formed special-shaped square pipe in air to a room temperature, and inspecting surface quality and mechanical properties of the special-shaped square pipe.

An intravenous therapy system may include a curved needle; and a curved catheter formed around the outside surface of the curved needle; wherein, upon insertion of a first length of the curved needle and curved catheter into a patient's body, a curvature angle of the curved needle and curved catheter causes the curved needle and curved catheter to intersect axially with a blood vessel in the patient's body.

An extruded material includes a peripheral wall having a closed loop-shaped cross-section and defining a hollow, and a middle rib connected to an inner peripheral surface of the peripheral wall and dividing the hollow. The extruded material is provided with a corrected portion set at a predetermined portion in a longitudinal direction and subjected to correction processing, and an uncorrected portion not subjected to the correction processing. The peripheral wall is expanded outward with respect to an original shape of the uncorrected portion in the corrected portion. While the middle rib is curved with respect to an imaginary straight line connecting connecting portions connected with the peripheral wall at both end portions of the middle rib in the uncorrected portion, the middle rib has a smaller degree of curvature than the original shape of the uncorrected portion in the corrected portion.

Extruded cylinder liners and methods of forming the same are disclosed. The extruded engine cylinder liner may include a cylindrical body having a longitudinal axis and defining an inner surface and an outer surface. A plurality of spaced apart features may protrude from the outer surface and may extend in a direction oblique to the longitudinal axis. The method may include extruding a metal material through a die to form a cylindrical body defining an inner surface and an outer surface and a plurality of spaced apart features protruding from the outer surface. The die may be rotated about a longitudinal axis during at least a portion of the extruding step such that the features extend in a direction oblique to the longitudinal axis. The oblique features may allow parent casting material to enter channels therebetween and prevent the liner from moving in the vertical and horizontal directions.

A method for manufacturing a strand from a stainless steel by cold forming a billet into the cold-hardened strand and subsequently annealing the strand is provided. The method allows stainless steel strands to be produced, which have both a high tensile strength, as well as a high degree of elongation. The strand is heated to a temperature ranging from 400 C. to 460 C. while the strand is being annealed, and the cold-hardened strand is surrounded by a protective gas atmosphere during the heating process.

A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 m to 50 m and an average length of a roughness curve element RSm of 150 m to 400 m, the male mold being to be used in combination with a female mold in the impact pressing.

A method for forming a hard disk drive base plate with an extended height is described. The method may include forming an initial hard disk drive base plate, forming a filler shim, and forming a shroud. The method may also include joining the initial hard disk drive base plate, the filler shim, and the shroud to extend a height of walls of the formed initial hard disk drive base plate, and to form the hard disk drive base plate with the extended height.

A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 m to 50 m and an average length of a roughness curve element RSm of 150 m to 400 m, the male mold being to be used in combination with a female mold in the impact pressing.

In this flat extruded aluminum multi-port tube, the corrosion-resistance, at inner surfaces of a plurality of flow passages independently and parallelly extending in the tube axial direction, is effectively enhanced. In a flat extruded aluminum multi-port tube 10 formed by an extrusion by employing an aluminum tube material and an aluminum sacrificial anode material having an electrochemically lower potential than the aluminum tube material, the aluminum sacrificial anode material is exposed to form a sacrificial anode portion 18 at least in a part of an inner circumferential portion in each of the plurality of flow passages 12.