A sand source selecting structure for a sandblasting gun has a main body; a channel provided in the main body, for passing pressurized gas; at least two sub-channels provided in the main body respectively connected to the channel; a sandbox mounted on the main body connected to the channel through the first sub-channel; a first control valve installed in the first sub-channel; and a second control valve installed in the second sub-channel. Therefore, the combination of the first control valve with the second valve provides a selecting structure, which can offer different sand supply sources.

A method for surface treatment includes performing blasting on a surface of a workpiece, and irradiating the blasted surface of the workpiece with electron beam.

A shot peening method includes performing first shot peening for applying residual stress to a surface of an object formed of a metal material at a first depth, and performing second shot peening for applying residual stress to the surface of the object at a second depth deeper than the first depth after the first shot peening.

A shot peening method includes performing first shot peening for applying residual stress to a surface of an object formed of a metal material at a first depth, and performing second shot peening for applying residual stress to the surface of the object at a second depth deeper than the first depth after the first shot peening.

A glass article including a first main surface, a second main surface, and an end face, in which: the glass article includes an antiglare layer on the first main surface side; the antiglare layer has a glass transition point Tg of equal to or less than a glass transition point Tg.sub.0 of the glass article at a center portion in a cross section along a thickness direction; and the first main surface has a protrusion diameter y (μm) that satisfies the relation (1) with respect to a 60° specular gloss (gloss value) x (%) of the first main surface, y>−0.0245x+3.65 (1).

A depowdering apparatus for depowdering a cake comprising a build part includes a depowdering chamber, a blast nozzle, and a build elevator. The depowdering chamber includes a bottom surface and a build inlet extending through the bottom surface, where the build inlet includes an inlet axis that is substantially vertically oriented. The blast nozzle is positioned within the depowdering chamber and oriented to direct a fluid stream toward the inlet axis. The blast nozzle is laterally spaced from the inlet axis and operable to revolve about the inlet axis on a travel path encircling the inlet axis. The build elevator is arranged below the build inlet in a vertical direction and is operable to raise the cake comprising the build part through the build inlet and into the depowdering chamber along the inlet axis as the blast nozzle is revolved about the inlet axis on the travel path.

A rust inhibiting process for cleaning and protecting a target object is disclosed. Comprising mixing at least a rust inhibitor and a fluid into a slurry mixture, spraying the slurry mixture at the target object from within a reservoir of a slurry blasting system, separating a tarnished top layer and a parent metal of the target object with a slurry stream, cleaning the parent metal with the rust inhibitor, preventing the parent metal from impregnating with contaminants during cleaning with the rust inhibitor, and protecting the parent metal with the rust inhibitor after spraying is complete. The slurry stream comprises the slurry mixture of the slurry blasting system being sprayed with the slurry blasting system. The slurry blasting system comprises a tank.

A method for manufacturing a magnetostrictive torque sensor shaft (100) to which a sensor portion (2) of a magnetostrictive torque sensor (1) is to be attached includes: a heat treatment step of subjecting an iron-based shaft member to a carburizing, quenching, and tempering process; a shot peening step of performing shot peening using a steel shot media having a Vickers hardness at least equal to 1100 and at most equal to 1300, at least in a position on the shaft member, after the heat treatment step, to which the sensor portion (2) is to be attached; and a surface polishing step of subjecting the shaft member after the shot peening to surface polishing.

A method for manufacturing a magnetostrictive torque sensor shaft (100) to which a sensor portion (2) of a magnetostrictive torque sensor (1) is to be attached includes: a heat treatment step of subjecting an iron-based shaft member to a carburizing, quenching, and tempering process; a shot peening step of performing shot peening using a steel shot media having a Vickers hardness at least equal to 1100 and at most equal to 1300, at least in a position on the shaft member, after the heat treatment step, to which the sensor portion (2) is to be attached; and a surface polishing step of subjecting the shaft member after the shot peening to surface polishing.

A method of cleaning a component includes providing the component following the operation of the component in a high temperature environment, the component including a thermal barrier coating (TBC), cleaning the TBC of the component using a sponge jet blasting process, and measuring a cleaned thickness of the TBC to verify that the cleaned thickness exceeds a predetermined minimum value that will allow the return of the component to the high temperature environment.