Abstract: The present invention relates to a high-hardness hardfacing alloy powder, containing: 0.5<C?3.0 mass %, 0.5?Si?5.0 mass %, 10.0?Cr?30.0 mass %, and 16.0<Mo?40.0 mass %, with the balance being Co and unavoidable impurities, wherein a total amount of Mo and Cr satisfies 40.0?Mo+Cr?70.0 mass %. The high-hardness hardfacing alloy powder according to the present invention may further contain at least one element selected from the group consisting of: Ca?0.03 mass %, P?0.03 mass %, Ni?5.0 mass % and Fe?5.0 mass %. The high-hardness hardfacing alloy powder according to the present invention can be employed for build-up welding of a face part of a valve used in various internal combustion engines, automotive engines, steam turbines, heat exchangers, heating furnaces and the like.

Abstract: The present invention relates to a precipitation hardened heat-resistant steel containing, in terms of % by mass: 0.005 to 0.2% of C, not more than 2% of Si, 1.6 to 5% of Mn, 15% or more and less than 20% of Ni, 10 to 20% of Cr, more than 2% and up to 4% of Ti, 0.1 to 2% of Al, and 0.001 to 0.02% of B, with the balance being Fe and inevitable impurities, in which a ratio (Ni/Mn) of an amount of Ni to an amount of Mn is 3 to 10, a total amount of Ni and Mn (Ni+Mn) is 18% or more and less than 25%, and a ratio (Ti/Al) of an amount of Ti to an amount of Al is 2 to 20.

Abstract: The present invention relates to a high-hardness hardfacing alloy powder, containing: 0.5<C?3.0 mass %, 0.5?Si?5.0 mass %, 10.0?Cr?30.0 mass %, and 16.0<Mo?40.0 mass %, with the balance being Co and unavoidable impurities, wherein a total amount of Mo and Cr satisfies 40.0?Mo+Cr?70.0 mass %. The high-hardness hardfacing alloy powder according to the present invention may further contain at least one element selected from the group consisting of: Ca?0.03 mass %, P?0.03 mass %, Ni?5.0 mass % and Fe?5.0 mass %. The high-hardness hardfacing alloy powder according to the present invention can be employed for build-up welding of a face part of a valve used in various internal combustion engines, automotive engines, steam turbines, heat exchangers, heating furnaces and the like.

Abstract: The present invention relates to a precipitation hardened heat-resistant steel containing, in terms of % by mass: 0.005 to 0.2% of C, not more than 2% of Si, 1.6 to 5% of Mn, 15% or more and less than 20% of Ni, 10 to 20% of Cr, more than 2% and up to 4% of Ti, 0.1 to 2% of Al, and 0.001 to 0.02% of B, with the balance being Fe and inevitable impurities, in which a ratio (Ni/Mn) of an amount of Ni to an amount of Mn is 3 to 10, a total amount of Ni and Mn (Ni+Mn) is 18% or more and less than 25%, and a ratio (Ti/Al) of an amount of Ti to an amount of Al is 2 to 20.

Abstract: A magneto generator can increase a suppression force to suppress permanent magnets from being moved to an opening side of a flywheel with easy construction and at low cost. In this magnet generator, the flywheel has a groove formed on its inner peripheral wall surface at an opening side thereof, and a magnet positioning member has a magnet coming-off preventing member formed at the opening side of the flywheel so as to cover end faces of the permanent magnets, with a protrusion being formed on the magnet coming-off preventing member so as to engage the groove in the flywheel. The protrusion is in engagement with the groove whereby the movement in an axial direction of the permanent magnets can be suppressed.

Abstract: A permanent-magnet generator includes a flywheel having a ringlike portion and a bottom portion which closes off one end of the ringlike portion and a plurality of protrusions bulging inward from the bottom portion of the flywheel. An irregular surface portion is formed in each of the protrusions for producing turbulence when the flywheel rotates, the irregular surface portion being irregularly shaped in section along a circumferential direction of the flywheel.

Abstract: A magneto generator can increase a suppression force to suppress permanent magnets from being moved to an opening side of a flywheel with easy construction and at low cost. In this magnet generator, the flywheel has a groove formed on its inner peripheral wall surface at an opening side thereof, and a magnet positioning member has a magnet coming-off preventing member formed at the opening side of the flywheel so as to cover end faces of the permanent magnets, with a protrusion being formed on the magnet coming-off preventing member so as to engage the groove in the flywheel. The protrusion is in engagement with the groove whereby the movement in an axial direction of the permanent magnets can be suppressed.

Abstract: A permanent-magnet generator includes a flywheel having a ringlike portion and a bottom portion which closes off one end of the ringlike portion and a plurality of protrusions bulging inward from the bottom portion of the flywheel. An irregular surface portion is formed in each of the protrusions for producing turbulence when the flywheel rotates, the irregular surface portion being irregularly shaped in section along a circumferential direction of the flywheel.