A magnetic geared rotary electric machine includes: a casing; a stator which includes a stator core, a coil, and a stator magnet provided inside the stator core; a first rotor which includes pole pieces provided inside the stator; a second rotor which includes a rotor core provided inside the first rotor and rotor magnets provided in the rotor core at intervals in a circumferential direction; movable bearings which are provided in the casing so as to be arranged at intervals in the circumferential direction and which come into contact with at least one of outer peripheral surfaces of the first rotor and the second rotor; and actuators which move the movable bearings in a direction included in a plane orthogonal to an axis.

Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050° C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.

A heterogeneous composite consisting of near-nano ceramic clusters dispersed within a ductile matrix. The composite is formed through the high temperature compaction of a starting powder consisting of a core of ceramic nanoparticles held together with metallic binder. This core is clad with a ductile metal such that when the final powder is consolidated, the ductile metal forms a tough, near-zero contiguity matrix. The material is consolidated using any means that will maintain its heterogeneous structure.

A heterogeneous composite consisting of near-nano ceramic clusters dispersed within a ductile matrix. The composite is formed through the high temperature compaction of a starting powder consisting of a core of ceramic nanoparticles held together with metallic binder. This core is clad with a ductile metal such that when the final powder is consolidated, the ductile metal forms a tough, near-zero contiguity matrix. The material is consolidated using any means that will maintain its heterogeneous structure.

An evaluation test method for flaking caused by hydrogen embrittlement includes: preparing a rolling bearing having a first bearing ring, a second bearing ring, and a rolling element, the first bearing ring being a rotation ring including a first raceway surface, the second bearing ring being a stationary ring including a second raceway surface facing the first raceway surface, the rolling element being disposed between the first raceway surface and the second raceway surface; and applying a rotation around a central axis onto the first bearing ring in a state in which a load is applied between the first raceway surface and the second raceway surface through the rolling element. Each of the first bearing ring, the second bearing ring, and the rolling element is composed of a steel. The first raceway surface and the second raceway surface are always entirely immersed in lubricating oil during the rotation.

A bearing cover assembly configured to assemble to a bearing housing in which a rolling element bearing is accommodated. The bearing housing assembly includes an end cap with a sleeve portion that mates to an interior conical surface of the bearing housing with a complementary outer bevel formed on the sleeve portion.

A method for controlling carbide network in a bearing steel wire rod by controlling cooling and rolling, comprises the following steps: rapidly rolling a bar to a wire rod and spinning it into a loose coil, controlling the rolling temperature at 780° C.-880° C.; and the spinning temperature at 750° C.-850° C.; carrying out on-line controlling cooling of continuous loose coils using EDC water bath austempering cooling process, controlling the cooling rate at 2.0° C./s-10° C./s, and controlling the final cooling temperature within 620-630° C.; after EDC water bath austempering cooling, using slow cooling under a cover, and the temperature is controlled to be 400° C.-500° C. when being removed out of the cover; after slow cooling, collecting coils, and cooling in air to the room temperature.

Wettable structures that retain liquid layers are defined at surfaces of substrates. The wettable structures include grooves or ridges that are spaced apart by between 10 nm and 10 μm and can be defined in substrate or in a layer formed on a surface of the substrate. In typical examples, wettable structures are defined with hydrophobic materials or at hydrophobic surfaces and produce hydrophilic surfaces.

Wettable structures that retain liquid layers are defined at surfaces of substrates. The wettable structures include grooves or ridges that are spaced apart by between 10 nm and 10 μm and can be defined in substrate or in a layer formed on a surface of the substrate. In typical examples, wettable structures are defined with hydrophobic materials or at hydrophobic surfaces and produce hydrophilic surfaces.

A bearing component such as a bearing ring includes a metallic base body and at least one alloy steel coating on the base body, the coating being applied to the base body by deposition welding. The base body is preferably non-alloy steel or cast iron, and the alloy includes at least one carbide-forming transition metal such as niobium, tantalum, zirconium, titanium, hafnium, tungsten, molybdenum, vanadium, or manganese. The coating can form a raceway of the bearing component or a structural element such as a flange. Also a method of forming such a bearing component is provided.