A microalloyed steel component according to an aspect of the present disclosure includes a structure composed of ferrite and pearlite. The microalloyed steel component includes a columnar structure including band-shaped pearlite layers extending in a longitudinal direction of the microalloyed steel component and having a width of 200 m or shorter, and a ferrite layer precipitated so as to extend in the longitudinal direction between the pearlite layers.

In a method for making a tooth system of a gearing component, an unfinished tooth-system part is heat-treated. At least part of an oxide layer on the unfinished tooth-system part is mechanically removed, while leaving a residual oxide layer in at least one region, and the residual oxide layer is at least partially removed by irradiating with a laser at least a portion of the residual oxide layer.

Disclosed is a method for vacuum electron beam welding of twinning-induced plasticity (TWIP) steel and use thereof. The welding method according to the present disclosure includes preheating welding, tack welding, and deep penetration welding. The method according to the present disclosure can achieve welding stability, a uniform butt joint width, small splash and full arc ending, and ensure that the internal quality of a welded joint meets requirements for an ISO13919-1 grade B butt joint, and the plasticity and tensile strength of the welded joint are equivalent to those of a base metal, thereby ensuring that the welded joint has a high energy-absorbing buffering function equivalent to that of a base metal. A vehicle anti-collision beam manufactured after welding and a vehicle energy-absorbing buffer component assembled by using the anti-collision beam have the advantages of light structure, high safety protection, etc.

This invention relates to a method and arrangement for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by supplying the metallic feed material in the form of a wire and employing two gas transferred arcs, one plasma transferred arc for heating the deposition area on the base material and one plasma transferred arc for heating and melting the feed wire.

Method of repairing and manufacturing of turbine engine components includes application of a transition layer by fusion welding with dissimilar nickel based filler material, preferably comprising from about 0.05 wt. % to about 1.2 wt. % B and other alloying elements, followed by a diffusion and primary aging heat treatment and application of the top oxidation resistance layer using dissimilar nickel based filler materials comprised 3-6 wt. % Al, 0.5-6 wt. % Si, 12-25 wt. % Cr and other alloying elements that enhance strength and oxidation resistance followed by a secondary aging heat treatment and machining of the repaired area to restore geometry of turbine engine components. The inventions also relates to a turbine engine components repaired and manufactured by the method.

In an outer joint member of a constant velocity universal joint, a cup member and a shaft member are made of medium to high carbon steel and welded together. The cup member has a bottomed cylindrical shape that is opened at one end, and includes a cylindrical portion, a bottom portion, and a short shaft section of a solid shaft shape protruding from the bottom portion and having a joining end surface. The shaft member has a solid shaft shape and a joining end surface. The joining end surfaces of the cup and shaft members are brought into abutment against each other, and a high energy intensity beam is radiated from an outer side in a radial direction to form a welded portion. A structure of a molten metal at the welded portion is in a mixed phase of ferrite and granular cementite.

A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 8.0 to 12.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 30 to 100 mm is heated to a temperature of 1050 to 1200 C. and is held at this temperature for 2 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant from the surface of the edge by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 720 to 780 C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1):

(Log(t)+12).Math.(T+273)<13810(1).

A three-dimensional shaping device shapes a three-dimensional article by irradiating a powder material with an electron beam and melting the powder material. The three-dimensional shaping device includes an electron beam emitting unit emitting the electron beam, melting the powder material in order to shape the article, and performing preliminary heating of the powder material by irradiating the powder material with the electron beam before the article is shaped. The electron beam emitting unit moves an irradiation position of the electron beam in a spiral pattern when the powder material is irradiated with the electron beam for preliminary heating.

An additive manufacturing device performs manufacturing of an additively manufactured article by supplying a powder material to an irradiation region of an electron beam, laying and leveling the powder material, irradiating the powder material with the electron beam, and melting the powder material. The additive manufacturing device determines whether or not the powder material has scattered during manufacturing of the article. When it is determined that the powder material has scattered, an irradiation region R is heated by a heater before a new powder material is supplied to the irradiation region R. Manufacturing of the article is restarted after the new powder material has been supplied to the heated irradiation region.

A method for producing a workpiece, includes providing a substrate having a predetermined surface structure; coating the surface structure with a coating material, wherein the coating material is resistant to a production temperature of an additive production method; the additive production of a material for the workpiece on the coated surface structure using the additive production method such that the coated surface structure defines a base surface of the workpiece to be produced, and the detachment of the substrate. A workpiece is produced by the described method.