A method of forming an earth-boring tool includes introducing metal into a die, rotating the die to generate centrifugal forces on the metal, and cooling the metal in the rotating die. A rotary drill bit may include a unitary, centrifugally cast bit body including an integral shank, at least one blade, and at least one cutting element on the blade. A rotary drill bit or a roller cone may include a first centrifugally cast material and a second centrifugally cast material. Another rotary drill bit includes a bit body comprising a maraging steel alloy. A method of forming a rotary drill bit may include disposing cutting elements on a rotary drill bit comprising maraging steel and aging the rotary drill bit to form at least one intermetallic precipitate phase. Methods of repairing a rotary drill bit include annealing and aging at least a portion of a rotary drill bit.

A method of forming an earth-boring tool includes introducing metal into a die, rotating the die to generate centrifugal forces on the metal, and cooling the metal in the rotating die. A rotary drill bit may include a unitary, centrifugally cast bit body including an integral shank, at least one blade, and at least one cutting element on the blade. A rotary drill bit or a roller cone may include a first centrifugally cast material and a second centrifugally cast material. Another rotary drill bit includes a bit body comprising a maraging steel alloy. A method of forming a rotary drill bit may include disposing cutting elements on a rotary drill bit comprising maraging steel and aging the rotary drill bit to form at least one intermetallic precipitate phase. Methods of repairing a rotary drill bit include annealing and aging at least a portion of a rotary drill bit.

The present application belongs to the technical field of new energy vehicle motors, and discloses an aluminum alloy for casting a motor rotor in a new energy vehicle and a preparation method thereof. The aluminum alloy includes 0.05 wt %-0.06 wt % titanium, 0.04 wt %-0.06 wt % boron, 0.15 wt %-0.5 wt % silicon, 0.01 wt %-0.08 wt % iron, 0.5 wt %-0.7 wt % copper, 0.3 wt %-0.5 wt % magnesium, 0.01 wt %-0.2 wt % zinc, 0.02 wt %-0.12 wt % manganese, and the balance of aluminum. By adding new elements and adjusting the ratio of the elements, the strength of the cast aluminum alloy is enhanced, and meanwhile, the excellent electricity conductivity can also be kept.

The present application belongs to the technical field of new energy vehicle motors, and discloses an aluminum alloy for casting a motor rotor in a new energy vehicle and a preparation method thereof. The aluminum alloy includes 0.05 wt %-0.06 wt % titanium, 0.04 wt %-0.06 wt % boron, 0.15 wt %-0.5 wt % silicon, 0.01 wt %-0.08 wt % iron, 0.5 wt %-0.7 wt % copper, 0.3 wt %-0.5 wt % magnesium, 0.01 wt %-0.2 wt % zinc, 0.02 wt %-0.12 wt % manganese, and the balance of aluminum. By adding new elements and adjusting the ratio of the elements, the strength of the cast aluminum alloy is enhanced, and meanwhile, the excellent electricity conductivity can also be kept.

Cylinder liners, methods of forming the same, and outer surface designs of a cylinder liner having as-cast projections with certain functional shapes are provided. The as-cast projections increase the clamping performance of the cylinder liner and do not result in any air gaps between a cast aluminum block and the cylinder liner.

Cylinder liners, methods of forming the same, and outer surface designs of a cylinder liner having as-cast projections with certain functional shapes are provided. The as-cast projections increase the clamping performance of the cylinder liner and do not result in any air gaps between a cast aluminum block and the cylinder liner.

A process for producing a casing for a roller press for subjecting particulate matter to be ground to high pressure treatment, the casing having a profiling defined by profile comb, wherein the process includes the steps of casting a cylindrical hollow body and introducing axial longitudinal grooves onto the surface of the cylindrical hollow body. The material for casting is of a particular composition, where that composition includes, among other components, between 0.0012% and 0.0027%, by weight, of phosphorus (P).

A process for producing a casing for a roller press for subjecting particulate matter to be ground to high pressure treatment, the casing having a profiling defined by profile comb, wherein the process includes the steps of casting a cylindrical hollow body and introducing axial longitudinal grooves onto the surface of the cylindrical hollow body. The material for casting is of a particular composition, where that composition includes, among other components, between 0.0012% and 0.0027%, by weight, of phosphorus (P).

A method of assembling a centrifugal casting apparatus includes positioning a wedge on a rotatable axis and positioning at least two molds into sealing engagement with the wedge. Each of the at least two molds includes a front face and defines at least two cavities extending from the front face into the mold. A sprue chamber is defined and is structured to receive molten material, and at least a portion of the sprue chamber is defined by at least a portion of the front faces of the at least two molds.

The present disclosure provides a concrete distributing boom. The concrete distributing boom is provided with a bracket. The bracket is configured to support a hose at a tail end of a concrete conveying pipe (11). The bracket is formed by a multilayer composite tube made of at least two layers of aluminum alloy arranged in a stacked manner. The at least two layers of aluminum alloy include an outermost layer of aluminum alloy and an innermost layer of aluminum alloy. Of the at least two layers of aluminum alloy, the outermost layer of aluminum alloy is more resistant to abrasion, and the innermost layer of aluminum alloy is more rigid. The bracket of the present disclosure has improved abrasion-resistance and load-bearing property and a reduced weight, thereby improving the load-bearing property and the service life of the concrete distributing boom.