Provided is a Ni-based alloy for hot forging die having high compressive strength at high temperature and good oxidation resistance that is capable of suppressing work environment deterioration and shape deterioration. A Ni-based alloy for hot forging die in the present invention includes, by mass, 7.0 to 12.0% W, 4.0 to 11.0% Mo, 5.0 to 7.5% Al, and 0.5 to 7.5% Cr, and the balance of Ni with inevitable impurities. In addition, the Ni-based alloy for hot forging die may further include 0.5 to 7.0% by mass Ta and may further include one or more elements selected from, by mass, 0.001 to 0.5% Zr, 0.001 to 0.5% Hf, 0.001 to 0.2% a rare-earth element, 0.001 to 0.2% Y, and 0.001 to 0.03% Mg. The Ni-based alloy for hot forging die may have a 0.2% compressive proof strength of at least 500 MPa at a test temperature of 1000 C. and a strain rate of 10.sup.3/sec.

A release agent for a hot-forging die, containing micronanobubbles.

A release agent for a hot-forging die, containing micronanobubbles.

A punch, such as a socket punch, with an angle on a portion of the punch and method of manufacturing a punch with an angle on a portion of the punch using wire EDM. A punch for a cold forming process includes a base portion adapted to be a structural backbone for the punch and a work portion extending from the base portion that performs a punching operation. In addition, grooves and a hex portion are formed in the working portion with an electric discharge machining (EDM) machine. Further, a cone point is machined on an end of the hex portion and a land area with an inwardly tapered angle formed between the hex portion and the cone point. The punch can be manufactured more quickly and from a CAD model, therefore removing the need for over-specialized equipment and improving manufacturing times.

A punch, such as a socket punch, with an angle on a portion of the punch and method of manufacturing a punch with an angle on a portion of the punch using wire EDM. A punch for a cold forming process includes a base portion adapted to be a structural backbone for the punch and a work portion extending from the base portion that performs a punching operation. In addition, grooves and a hex portion are formed in the working portion with an electric discharge machining (EDM) machine. Further, a cone point is machined on an end of the hex portion and a land area with an inwardly tapered angle formed between the hex portion and the cone point. The punch can be manufactured more quickly and from a CAD model, therefore removing the need for over-specialized equipment and improving manufacturing times.

A method of manufacturing a component, the method including a maraging steel blank with an initial shape; and performing an incremental cold forming operation on the maraging steel blank, wherein the incremental cold forming operation reduces a thickness of the maraging steel blank.

Provided is a method for producing a hot forged material capable of preventing the generation of double-barreling shaped forging defects. A method for producing a hot forged material, wherein both an upper die and a lower die are made of Ni-based super heat-resistant alloy, and a material for hot forging is pressed by the lower die and the upper die in the air to form the hot forged material, the method comprising: a raw material heating step of heating the material for hot forging in a furnace to a heating temperature within a range of 1000 to 1150 C.; a jig heating step of heating a holding jig for holding the material for hot forging within a temperature range of 50 C. lower than and 100 C. higher than the heating temperature of the material for hot forging; a die heating step of heating the upper die and the lower die to a heating temperature within a range of 950 to 1100 C.; and a transferring step of transferring the material for hot forging onto the lower die by using the holding jig attached to a manipulator after the completion of the raw material heating step, the jig heating step, and the die heating step.

Provided is a method for producing a hot forged material capable of preventing the generation of double-barreling shaped forging defects. A method for producing a hot forged material, wherein both an upper die and a lower die are made of Ni-based super heat-resistant alloy, and a material for hot forging is pressed by the lower die and the upper die in the air to form the hot forged material, the method comprising: a raw material heating step of heating the material for hot forging in a furnace to a heating temperature within a range of 1000 to 1150 C.; a jig heating step of heating a holding jig for holding the material for hot forging within a temperature range of 50 C. lower than and 100 C. higher than the heating temperature of the material for hot forging; a die heating step of heating the upper die and the lower die to a heating temperature within a range of 950 to 1100 C.; and a transferring step of transferring the material for hot forging onto the lower die by using the holding jig attached to a manipulator after the completion of the raw material heating step, the jig heating step, and the die heating step.

A method for manufacturing a gear toothing on a metallic workpiece and a tool device for calibration of a gear toothing inlet and/or a gear toothing outlet of a gear of the metallic workpiece. The method includes producing the gear toothing by forming manufacturing and performing a compression process to calibrate a gear toothing inlet and/or a gear toothing outlet of the gear toothing, wherein a gear tooth shape and a gear tooth length are adjusted during the compression process. The tool device includes a workpiece location for accommodating the workpiece, an axially movable die selectively engageable with the gear toothing, the die supporting the gear toothing and predefining the gear tooth shape to be adjusted on the gear toothing inlet and/or on the gear toothing outlet, and at least one axially movable compression ring which calibrates the gear toothing inlet and/or gear toothing outlet by a compression process.

A press die includes: a die base; a plurality of die members arranged on the die base so as to produce a forming surface; a plurality of shims each of which is interposed between the die base and each of the plurality of die members; and a frame that surrounds the die base, the plurality of die members, and the plurality of shims. Each of the plurality of shims has a hardness higher than the plurality of die members. A regulating means that carries out a regulation so that an amount of displacement of each of the plurality of die members caused by pressure applied during press forming becomes smaller in proportion to proximity of the die member to the frame is provided between the die base and the plurality of die members or provided on the die base.