摘要:
High cleanliness spring steel useful in manufacturing a spring with SiO2-based inclusions being extremely controlled and excellent in fatigue properties is provided.High cleanliness spring steel which is steel containing; C: 1.2% (means mass %, hereafter the same with respect to the component) or below (not inclusive of 0%), Si: 1.2-4%, Mn: 0.1-2.0%, Al: 0.01% or below (not inclusive of 0%), and the balance comprising iron with inevitable impurities, wherein; the total of oxide-based inclusions of 4 or above of L (the large diameter of an inclusion)/D (the short diameter of an inclusion) and 25 μm or above of D and oxide-based inclusions of less than 4 L/D and 25 μm or above of L, in the oxide-based inclusions of 25 mass % or above of oxygen concentration and 70% (means mass %, hereafter the same with respect to inclusions) or above of SiO2 content when Al2O3+MgO+CaO+SiO2+MnO=100% is presumed, out of inclusions in the steel, is 20 nos./500 g or below.
摘要:
High cleanliness spring steel useful in manufacturing a spring with SiO2-based inclusions being extremely controlled and excellent in fatigue properties is provided. High cleanliness spring steel which is steel containing; C: 1.2% (means mass %, hereafter the same with respect to the component) or below (not inclusive of 0%), Si: 1.2-4%, Mn: 0.1-2.0%, Al: 0.01% or below (not inclusive of 0%), and the balance comprising iron with inevitable impurities, wherein; the total of oxide-based inclusions of 4 or above of L (the large diameter of an inclusion)/D (the short diameter of an inclusion) and 25 μm or above of D and oxide-based inclusions of less than 4 L/D and 25 μm or above of L, in the oxide-based inclusions of 25 mass % or above of oxygen concentration and 70% (means mass %, hereafter the same with respect to inclusions) or above of SiO2 content when Al2O3+MgO+CaO+SiO2+MnO=100% is presumed, out of inclusions in the steel, is 20 nos./500 g or below.
摘要:
High cleanliness spring steel useful in manufacturing a spring with SiO2-based inclusions being extremely controlled and excellent in fatigue properties is provided.High cleanliness spring steel which is steel containing;C: 1.2% (means mass %, hereafter the same with respect to the component) or below (not inclusive of 0%), Si: 1.2-4%, Mn: 0.1-2.0%, Al: 0.01% or below (not inclusive of 0%), and the balance comprising iron with inevitable impurities, wherein; the total of oxide-based inclusions of 4 or above of L (the large diameter of an inclusion)/D (the short diameter of an inclusion) and 25 μm or above of D and oxide-based inclusions of less than 4 L/D and 25 μm or above of L, in the oxide-based inclusions of 25 mass % or above of oxygen concentration and 70% (means mass %, hereafter the same with respect to inclusions) or above of SiO2 content when Al2O3+MgO+CaO+SiO2+MnO=100% is presumed, out of inclusions in the steel, is 20 nos./500 g or below.
摘要:
An object of this invention is to provide a steel for high-cleanliness spring which is useful for the production of a spring excellent in fatigue characteristics in high Si steels. The steel for high-cleanliness spring with excellent fatigue characteristics according to the invention contains: in terms of mass %, C: 1.2% or less (excluding 0%); Si: 1.8% to 4%; Mn: 0.1% to 2.0%; and total Al: 0.01% or less (excluding 0%), with the remainder being iron and inevitable impurities, in which the Si amount and a solute (SIMS) Ca amount in the steel satisfy a relationship of the following expression (1): Si×10−7≦solute (SIMS) Ca≦Si×5×10−7 (1) (in which each of the solute (SIMS) Ca and Si represents the amount thereof (mass %) in the steel).
摘要:
An object of this invention is to provide a steel for high-cleanliness spring which is useful for the production of a spring excellent in fatigue characteristics in high Si steels. The steel for high-cleanliness spring with excellent fatigue characteristics according to the invention contains: in terms of mass %, C: 1.2% or less (excluding 0%); Si: 1.8% to 4%; Mn: 0.1% to 2.0%; and total Al: 0.01% or less (excluding 0%), with the remainder being iron and inevitable impurities, in which the Si amount and a solute (SIMS) Ca amount in the steel satisfy a relationship of the following expression (1): Si×10−7≦solute (SIMS) Ca≦Si×5×10−7 (1) (in which each of the solute (SIMS) Ca and Si represents the amount thereof (mass %) in the steel).
摘要:
An electric storage system includes at least two types of electric storage cells. A first electric storage unit is configured from a first electric storage cell, and a second electric storage unit is configured from a second electric storage cell. The first and second electric storage units are electrically connected to each other through a current controlling circuit.
摘要:
Electronic apparatus that can suppress the operating voltage of an incorporated semiconductor integrated circuit to a low voltage is provided. Electronic apparatus 1 includes a power supply circuit 13, a semiconductor integrated circuit 10 that operates by a supply voltage supplied from the power supply circuit 13, and a temperature sensor 11 that measures the temperature of the semiconductor integrated circuit 10. The power supply circuit 13 decreases the supply voltage according to a rise in the measured temperature.
摘要:
A signal processing device includes: a first correlator that sequentially multiplies a first receive signal including a pattern in a receive signal and a first reference pattern signal including a complex conjugate of a first partial signal of the first receive signal at a sampling timing to generate a first correlation voltage; a second correlator that sequentially multiplies the first receive signal and a second reference pattern signal including a complex conjugate of a second partial signal, which is behind the first partial signal, at a sampling timing to generate a second correlation voltage; and a phase difference generation circuit that generates a first phase difference between the first partial signal and the second partial signal based on a first correlation peak voltage obtained when the first correlation voltage has a peak value and a second correlation peak voltage obtained when the second correlation voltage has a peak value.
摘要:
A rotor includes a rotor core, a first magnet, a second magnet, a first pole partition line, and a second pole partition line. The first and second magnets are provided inside the rotor core and between the first and second pole partition line. The first magnet is closer to the first pole partition line than to the second pole partition line, and the second magnet is closer to the second pole partition line than to the first pole partition line. A distance between the first and second magnets at a position is wider as the position is closer to a circumference portion of the rotor core. The first magnet and the first pole partition line have a first minimum distance therebetween, the second magnet and the second pole partition line have a second minimum distance therebetween, and the first minimum distance is smaller than the second minimum distance.
摘要:
An electromagnetic steel plate forming member provides the two magnet holes for inserting therein the two permanent magnets per pole along the V-shape, which are provided in the region of the radial pole pitch lines OP provided in the rotor core at the predetermined pole pitch angle θ, one magnet hole is displaced in a direction apart from the center line OC of the pole pitch lines OP, and the other magnet hole is displaced in a direction approaching to the center line OC of the pole pitch lines OP.