摘要:
A martensitic heat-resisting steel comprises, in terms of % by mass, 0.01 to 0.30% of C, 0.02 of 0.80% of Si, 0.20 to 1.00% of Mn, 5.00 to 18.00% of Cr, 0.005 to 1.00% of Mo, 0.20 to 3.50% of W, 0.02 to 1.00% of V, 0.01 to 0.50% of Nb, 0.01 to 0.25% of N, and at least one element selected from the group consisting of Ti, Zr, Ta and Hf in an amount of 0.005 to 2.0% for each of the elements, the volume of (Ti %+Zr %+Ta %+Hf %) in the metal component M of M.sub.23 C.sub.6 type carbides therein being from 5 to 65%. The heat-resisting steel is produced by a process comprising the steps ofadding Ti, Zr, Ta and Hf to a molten steel having chemical components as mentioned above, during the period from 10 minutes before completion of refining to completion of refining, casting said molten steel, working the resulting casting, solution treating said worked product, subjecting said worked product to temporary cooling stop at a temperature from 950.degree. to 1,000.degree. C. in the course of cooling said hot worked product, and holding said worked product at the temperature for 5 to 60 minutes. The heat-resisting steel is excellent in HAZ-softening resistance, and exhibits a high creep strength at high temperature of at least 550.degree. C.
摘要:
A high-nitrogen ferritic heat-resisting steel with high niobium content comprises, in weight per cent, 0.01-0.30% C, 0.02-0.80% Si, 0.20-1.00% Mn, 8.00-13.00% Cr, 0.005-1.00% Mo, 0.20-1.50% W, 0.05-1.00% V, over 0.12 up to 2.00% Nb and 0.10-0.50%N, the balance being Fe and unavoidable impurities. A method of producing the steel comprises melting and equilibrating the steel components in an atmosphere of a mixed gas of a prescribed nitrogen partial pressure or nitrogen gas and thereafter casting or solidifying the resulting melt in an atmosphere controlled to have a total pressure of not less than 2.5 bar and a nitrogen partial pressure of not less than 1.0 bar, with the relationship between the nitrogen partial pressure p and the total pressure P beingP>2.5p.
摘要:
A liquid phase diffusion bonded pipe joint comprised of metal pipes or a metal pipe and a joint pipe joined by liquid phase diffusion bonding, the liquid phase diffusion bonded pipe joint comprised of a metal joint provided with a tapered slanted part press-fit into an end of a metal pipe by a thrust in a pipe axial direction while expanding the metal pipe in inside diameter and tightly engaging with the end and a joining surface part continuing from the tapered slanted part and joined with an end face of the metal pipe by liquid phase diffusion bonding and a metal pipe tightly engaging with the tapered slanted part in the expanded state and with an end face joined with the joining surface part by liquid phase diffusion bonding.
摘要:
A fabrication method for a multi-piece board having a frame part and multi piece parts each having a printed wiring board includes producing the frame part having a first coupling portion, and the multi-piece parts including piece parts each having a second coupling portion coupled to the first coupling portion at a production panel with at least the frame part and the piece parts being separated from each other, separating the frame part and the multi-piece parts from the production panel, and coupling the first coupling portion to the second coupling portion to couple the frame part and the piece parts and combine the frame part and the multi piece parts so as to yield the multi-piece board.
摘要:
A software development apparatus capable of mitigating troublesomeness involved in the development of software to be executed by a multi-core processor. A processor core identifier identifies one of processor cores with which software development information (project information, program development support information, debugging information, etc.) for developing software is associated. In accordance with the identification result, a display processor displays the association between the software development information and the corresponding processor core in a visually distinguishable manner.
摘要:
The present invention provides a high-tensile steel material having a tensile strength of the 550 MPa class or more which can simultaneously raise the strength and toughness of the heat affected zone of weld to equal those of the matrix and a method of production of the same, that is, a high-tensile steel material with excellent weldability and toughness and with tensile strength of the 550 MPa class or more containing, by mass %, C: 0.005 to 0.10%, W: 0.10 to 3.0%, Nb: 0.010 to 0.080%, and V: 0.010 to 0.50%, limiting the Ti to less than 0.005%, satisfying equation; EC=2[C]−[Nb]/9−[V]/12>0.020, having an amount of precipitation of W contained in the steel material, in terms of analytical value obtained by quantitative analysis of potential electrolysis extraction residue by fluorescent X-ray analysis, of 0.0050% or less, and having 60% or more of its structural composition in a cross-section of the steel as a bainite structure.
摘要:
In an embodiment of an optically coupled semiconductor device of the present invention, the optically coupled semiconductor device is provided with a resin sealing portion and lead drawing portions. The resin sealing portion integrally seals a power control semiconductor element chip, an firing light-receiving element chip for firing the power control semiconductor element chip, and a light-emitting element chip optically coupled with the firing light-receiving element, for converting an electric signal into an optical signal. The lead drawing portions are connected to the power control semiconductor element chip, the firing light-receiving element, and the light-emitting element chip, and are drawn out of the resin sealing portion. The optically coupled semiconductor device is further provided with a U-shaped radiator having extended portions that extend in an extending direction intersecting a drawing direction of the lead drawing portions and that are operable to hold the resin sealing portion therebetween.
摘要:
The present invention is provided with a light emitting diode 11 connected on a microcomputer side, an IGBT gate control portion 20 provided with a light receiving element 21 and a push-pull circuit, and a two-way switch portion 30 for controlling an alternating current. The two-way switch portion 30 is composed of a first IGBT 31 and a second IGBT 32 whose emitters are connected to each other and whose gates are connected to the output of the push-pull circuit, and a first FRD 33 and a second FRD 34 whose anodes are connected to each other. The collector of the first IGBT 31 is connected to the cathode of the first FRD 33, and the collector of the second IGBT 32 is connected to the cathode of the second FRD 34. ON/OFF control of the alternating current on the output side is controlled by connecting a signal line between the connection point of the emitters of the first IGBT 31 and the second IGBT 32, and the connection point of the anodes of the first FRD 33 and the second FRD 34.
摘要:
An image-taking apparatus is configured to carry out flashmatic control during flash photographing, wherein the light emission amount of light emission sections, the aperture diameter of an aperture diaphragm and the gain applied to an image signal in an AGC circuit are determined depending on the distance to the object. When the distance to the object, detected by a distance measuring device, is a predetermined value or less, at least one of the light emission amount of the light emission sections, the aperture diameter of the aperture diaphragm and the gain applied to the image signal is corrected to a value larger than the value determined by the flashmatic control, and flash photographing is carried out.
摘要:
The present invention is a high strength steel pipe excellent in formability in hydroforming and similar forming methods, characterized by: containing, in mass, C of 0.0005 to 0.30%, Si of 0.001 to 2.0%, Mn of 0.01 to 3.0% and appropriate amounts of other elements if necessary, with the balance consisting of Fe and unavoidable impurities; and an average for the ratios of the X-ray strength in the orientation component group of {110} to {111} to random X-ray diffraction strength on a plane at the wall thickness center being 2.0 or more and/or a ratio of the X-ray strength in the orientation component of {110} to random X-ray diffraction strength on the plane at the wall thickness center being 3.0 or more.