This torsion beam manufacturing method is for manufacturing a torsion beam including a central portion of which a cross-section orthogonal to a longitudinal direction is a closed cross-section having a substantial V-shape or a substantial U-shape at any position in the longitudinal direction, and a shape changing portion which has a connection region leading to the central portion and including a closed cross-section having a shape different from the shape of the closed cross-section of the central portion. This torsion beam manufacturing method has a compression step of thickening at least the connection region through application of a compression force in the longitudinal direction to at least the connection region of a torsion beam material to obtain the torsion beam, the torsion beam material being formed with the central portion and the shape changing portion.

The invention provides a method and a product for manufacturing a titanium alloy dual-structure turbine disk based on partial hydrogenation, which includes the following steps: coating a glass coating on the partial surface of a titanium alloy billet where hydrogen-blocking is required, and sintering the titanium alloy billet coated with the glass coating; performing hydrogenation treatment on the titanium alloy billet, such that the hydrogen concentration at the hydrogenation-required portion reaches the predetermined level; removing the glass coating from the titanium alloy billet; preheating the titanium alloy billet, and then performing high temperature die forging in the forging dies; performing vacuum dehydrogenation treatment on the forged turbine disk to remove hydrogen element inside the forging, so that the hydrogen content is 0.015 wt. % or less.

The invention provides a method and a product for manufacturing a titanium alloy dual-structure turbine disk based on partial hydrogenation, which includes the following steps: coating a glass coating on the partial surface of a titanium alloy billet where hydrogen-blocking is required, and sintering the titanium alloy billet coated with the glass coating; performing hydrogenation treatment on the titanium alloy billet, such that the hydrogen concentration at the hydrogenation-required portion reaches the predetermined level; removing the glass coating from the titanium alloy billet; preheating the titanium alloy billet, and then performing high temperature die forging in the forging dies; performing vacuum dehydrogenation treatment on the forged turbine disk to remove hydrogen element inside the forging, so that the hydrogen content is 0.015 wt. % or less.

A method for producing a sheet metal part for a laminated core of a rotor of an electric motor, a sheet metal part, and a rotor are disclosed. The method includes punching out the sheet metal part from a sheet metal strip to provide at least two recesses and at least two rotor webs; and forming an elevation at least in one region that protrudes out of the sheet metal part with respect to a sheet metal part plane.

Described are processes for shaping age hardenable aluminum alloys, such as 2XXX, 6XXX and 7XXX aluminum alloys in T4 temper, or articles made of such alloys, including aluminum alloy sheets. The processes involve heating the sheet or article before and/or concurrently with a forming step. In some examples, the sheet is heated to a specified temperature in the range of about 100-600° C. at a specified heating rate within the range of about 3-600° C./s, for example about 3-90° C./s. Such a combination of temperature and heating rate results in an advantageous combination of sheet properties.

Described are processes for shaping age hardenable aluminum alloys, such as 2XXX, 6XXX and 7XXX aluminum alloys in T4 temper, or articles made of such alloys, including aluminum alloy sheets. The processes involve heating the sheet or article before and/or concurrently with a forming step. In some examples, the sheet is heated to a specified temperature in the range of about 100-600° C. at a specified heating rate within the range of about 3-600° C./s, for example about 3-90° C./s. Such a combination of temperature and heating rate results in an advantageous combination of sheet properties.

A roll stamping apparatus includes sets of rollers rotating while facing each other so as to press opposite surfaces of a material which is continuously supplied to move between the rollers; and molding portions having a stamping structure applied to outer surfaces of the sets of rollers so as to mold the material, wherein a plurality of sets of rollers are disposed in a movement direction of the material, the molding portions of the sets of rollers are formed to sequentially change a cross section of the material in the movement direction of the material, wherein at least one of the sets of rollers before a final set of rollers through which the material finally passes is a set of over-molding rollers having molding portions of which a length in a circumferential direction is longer than a length of the molding portions of the final set of rollers.

A roll stamping apparatus includes sets of rollers rotating while facing each other so as to press opposite surfaces of a material which is continuously supplied to move between the rollers; and molding portions having a stamping structure applied to outer surfaces of the sets of rollers so as to mold the material, wherein a plurality of sets of rollers are disposed in a movement direction of the material, the molding portions of the sets of rollers are formed to sequentially change a cross section of the material in the movement direction of the material, wherein at least one of the sets of rollers before a final set of rollers through which the material finally passes is a set of over-molding rollers having molding portions of which a length in a circumferential direction is longer than a length of the molding portions of the final set of rollers.

A press forming method for controlling a shape change of a press formed part over time after the press formed part springs back at a moment of a release from a press-forming die includes: a press forming step of press forming a metal sheet into the press formed part by using the press-forming die; a die releasing step of releasing the press formed part, which is press-formed, from the press-forming die; and a post-release die holding step of holding the released press formed part in a forming bottom dead center shape for 30 minutes or more by using the press-forming die.

A method of forming a shaped steel object, includes cutting a blank from an alloy composition. The alloy composition includes 0.1-1 wt. % carbon, 0.1-3 wt. % manganese, 0.1-3 wt. % silicon, 1-10 wt. % aluminum, and a balance being iron. The method also includes heating the blank to a temperature above a temperature at which austenite begins to form to generate a heated blank, transferring the heated blank to a die, forming the heated blank into a predetermined shape defined by the die to generate a shaped steel object, and decreasing the temperature of the shaped steel object to ambient temperature. The heating is performed under an atmosphere comprising at least one of an inert gas, a carbon (C)-based gas, and nitrogen (N.sub.2) gas.