Nippon Steel Corporation

Nec Corporation

Mitsubishi Denki Kabushiki Kaisha

Daisuke Matsuo

Yusaku Tomio

Masayuki Ariyoshi

Shingo Yamanouchi

Akihiko Sugiyama

Motoki Morita

Takahiro Nobukiyo

Hisashi Amaya

Kazumine Ogura

Hideki Takabe

Masayuki Sagara

Hiroaki Watano

Kyohei Kanki

Tsutomu Okuyama

Takuji Nakahata

Toshiya Nishimura

Mitsuyasu Numaguchi

A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3):ΔCr=([Cr*]−[Cr*])/[Cr*]  (1)ΔMo=([Mo*]−[Mo*])/[Mo*]  (2)ΔCr+ΔMo≤0.59  (3).

Martensitic stainless steel material

The chemical composition of the seamless steel pipe contains Cr: 15.00 to 18.00% in mass % and satisfies Formulae (1) and (2). Furthermore, in the microstructure, (I) a total volume ratio of ferrite and martensite is 80% or more, with the balance being retained austenite of a volume ratio of 20% or less, (II) the number of intersections NTin the L-direction observation field of view is 38 or more and NT/NL is 1.80 or more, and further (III) the number of intersections NTin the C-direction observation field of view is 30 or more and NT/NC is 1.70 or more.156Al+18Ti+12Nb+11Mn+5V+328.125N+243.75C+12.5S≤12.5  (1)Ca/S≥4.0  (2)

Seamless steel pipe and method for producing the same

The seamless steel pipe according to the present disclosure includes a chemical composition consisting of, in mass %, C: 0.030% or less, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.0050% or less, Al: 0.001 to 0.100%, N: 0.0500% or less, O: 0.050% or less, Ni: 5.00 to 6.50%, Cr: more than 10.00 to 13.40%, Cu: more than 1.50 to 3.50%, Mo: 1.00 to 4.00%, V: 0.01 to 1.00%, Ti: 0.050 to 0.300%, and Co: 0.010 to 0.300%, with the balance being Fe and impurities, and satisfying Formula (1), wherein a depassivation pH of an inner surface is 3.00 or less.Cr+2.0 Mo+0.5 Ni+2.0 Cu+0.5 Co≥20.0  (1)

Martensitic stainless seamless steel pipe

The martensitic stainless steel material has a chemical composition, which contains: in mass %, C: 0.030% or less, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less, S: 0.005% or less, Al: 0.010 to 0.100%, N: 0.0010 to 0.0100%, Ni: 5.00 to 6.50%, Cr: 10.00 to 13.40%, Cu: 1.80 to 3.50%, Mo: 1.00 to 4.00%, V: 0.01 to 1.00%, Ti: 0.050 to 0.300%, Co: 0.300% or less, Ca: 0.0006 to 0.0030%, and O: 0.0050% or less, and satisfies Formulae (1) and (2) in the description. An area of each intermetallic compound and each Cr oxide in the steel material is 5.0 &#x3bc;mor less, a total area fraction of intermetallic compounds and Cr oxides is 3.0% or less, and a maximum circle-equivalent diameter of Ca oxide is 9.5 &#x3bc;m or less.

There is provided an object identification apparatus for identifying a stationary object and a moving object. The object identification apparatus includes a phase difference calculator that calculates phase difference information between a transmission signal and a reception signal obtained by reflecting, by surfaces of the moving object and the stationary object in a space, the transmission signal emitted to the space and receiving the reflected transmission signal, a distance calculator that calculates distance information using the phase difference information, a distance information separator that separates the distance information into moving object distance information as distance information about the moving object and stationary object distance information as distance information about the stationary object, and an identifier that identifies the stationary object and the moving object based on the stationary object distance information and the moving object distance information.

Object identification apparatus, object identification method, and object identification program

An object sensing apparatusincludes: an emission unitconfigured to emit an RF transmission signal in each period; a reception unitconfigured to receive a reflected wave of the RF transmission signal as an RF reception signal; an IF signal generation unitconfigured to generate an IF signal by mixing the RF transmission signal and the RF reception signal; a one-dimensional spectrum generation unitconfigured to generate a one-dimensional spectrum with respect to distance obtained using the object sensing apparatus as a reference, based on the IF signal, and use the generated one-dimensional spectrum to generate a one-dimensional spectrum with fixed object reflection removed, from which a signal component caused by a reflected wave from a fixed object present in an emission range has been removed; a position detection unitconfigured to detect a position of an object other than the fixed object based on the amplitude of the one-dimensional spectrum with fixed object reflection removed; and a displacement detection unitconfigured to detect displacement of the object other than the fixed object, based on the phase of the one-dimensional spectrum with fixed object reflection removed, which corresponds to the position of the object other than the fixed object.

Object sensing apparatus, object sensing method, and computer readable recording medium

An object sensing apparatusincludes: an emission unitconfigured to emit an RF transmission signal as an electromagnetic wave for object sensing; a reception unitconfigured to receive a reflected wave of the RF transmission signal as an RF reception signal, and use the RF transmission signal to generate a demodulated signal based on the RF reception signal; a distance detection unitconfigured to detect a distance to the object that reflected the RF transmission signal based on the range spectrum calculated based on the demodulated signal; a behavior detection unitconfigured to detect behavior of the object based on the range spectrum; a fixed object specifying unitconfigured to specify a fixed object from among detected objects based on the distance and behavior; and a virtual image specifying unitconfigured to, if there are two or more objects other than the fixed object among the detected objects, calculate a degree of similarity in the change over time in the behavior for each combination of the objects other than the fixed object, and specify a virtual image based on the degree of similarity.

A steel bar for a downhole member is provided that is excellent in SCC resistance and SSC resistance. A martensitic stainless steel bar material for a downhole member of the present embodiment has a chemical composition that contains, by mass %, C: 0.020% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.03% or less, S: 0.01% or less, Cu: 0.10 to 2.50%, Cr: 10 to 14%, Ni: 1.5 to 7.0%, Mo: 0.2 to 3.0%, Ti: 0.05 to 0.3%, V: 0.01 to 0.10%, Nb: 0.1% or less, Al: 0.001 to 0.1% and N: 0.05% or less, with the balance being Fe and impurities, and satisfies Formula (1) and Formula (2).[Mo]&#x2212;4&#xd7;[total Mo amount in precipitate at R/2 position]&#x2265;1.30&#x2003;&#x2003;(1)[Total Mo amount in precipitate at center position]&#x2212;[total Mo amount in precipitate at R/2 position]&#x2264;0.03&#x2003;&#x2003;(2)

Steel bar for downhole member, and downhole member

The coverage control method includes at least: step Sof detecting that a load of an own cell is higher than a predetermined threshold (Lth) when there is another cell whose coverage partially overlaps the own cell; step Sof selecting an accommodation candidate cell that is a candidate to which a mobile station accommodated in the cell is unloaded, from the another cell based on a load condition related to a communication load that is a coverage control execution target; step Sof selecting a continuously accommodated mobile station that is a mobile station that continues to be a coverage control target of the own cell, from the mobile station accommodated in the own cell based on radio quality of the selected accommodation candidate cell; and step Sof controlling a coverage of the own cell by targeting at the selected continuously selected mobile station.

Coverage control method, base station apparatus, wireless communication system, and non-transitory computer readable medium having base station control program stored thereon

A motor network control system is provided which is capable of reducing the wiring length of a power cable and in which upon replacement of a motor or an inverter of a specific motor unit, no adverse influence is exerted on the other motor units. A power cable and a communication cable connecting between a plurality of motor units , each of which includes a motor , an inverter and a communication part , extend successively from a power supply and a network control computer , respectively, to the respective motor units in such a manner that the motor units are connected with each other in a cascade manner from a preceding one to a following one. In addition, each of the motor units includes a connection board on which an inverter and a communication part are installed. The power cable and the communication cable are connected with the respective inverters and the respective communication parts through connection terminal blocks, respectively, each of which includes a cable connector for connecting the cables from a preceding motor unit and the cables to a following motor with each other, and a terminal block fixture for detachably fixing the associated connection terminal block to the associated inverter or the associated communication part.

Growing community of inventors

Tokyo, Japan

Daisuke Matsuo