Abstract:
High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of −60° C. or less.
Abstract:
Provided are: a galvannealed steel sheet, improved in the adhesiveness of a plated layer with a base steel sheet, as a galvannealed steel sheet, prepared by using a high-strength steel sheet as a base material; and a method for producing the galvannealed steel sheet. A galvannealed layer is formed on the base steel sheet including a high-strength steel having a predetermined composition. The average amount of Fe in the galvannealed layer is 8.0 to 12.0%. The absolute value of a difference (ΔFe) between the amount of Fe in the vicinity of an interface with the base steel sheet and the amount of Fe in the vicinity of the external surface of the plated layer in the plated layer is 0.0 to 3.0%.
Abstract:
The present invention provides a high-corrosion-resistance hot-dip galvanized steel sheet having excellent appearance uniformity. The steel sheet includes: a coating layer containing Al: 4 to 22 mass %, Mg: 1 to 6 mass %, and Si: 0.001 to 1 mass %, and a balance being composed of Zn and inevitable impurities formed on a surface, in which at an interface between the coating layer and a base steel sheet, Mg2Si phases and Ca phases each mainly composed of Ca or a Ca compound exist, and at least part of the Mg2Si phases precipitate by using the Ca phases as a nucleus.
Abstract:
High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of −60° C. or less.
Abstract:
Disclosed is a thermally conductive material having excellent heat conductivity and insulating properties and having flame retardancy while retaining flexibility and toughness. More specifically, there is provided a thermally conductive material comprising: a hydrogenated copolymer (1) and/or a modified hydrogenated copolymer (2) in which each has a specific structure and is contained in a specific amount; and zinc oxide (3) comprising a core part and acicular crystal parts extending from the core part in four axial directions. The thermally conductive material optionally further comprises a paraffin oil (4), a flame retardant (5), or a filler (6) having a thermal conductivity of 10 to 400 W/m·K (the zinc oxide (3) is excluded).
Abstract:
A resin composition includes 1 to 20% by mass of (A) a copolymer containing a conjugated diene unit and a vinyl aromatic compound unit, 1 to 20% by mass of (B) a softening agent for rubber, and 70 to 95% by mass of (C) metal hydroxide, in which (A) the copolymer containing the conjugated diene unit and the vinyl aromatic compound unit includes a plurality of polymer blocks of the vinyl aromatic compound unit.
Abstract:
The mode-locking frequencies of two femtosecond laser light sources are controlled so that they are stabilized at high degree and the difference between the mode-locking frequencies is constant. The output of the laser light sources are used as a pumping light for generating terahertz pulses and a probe pulse light for terahertz detection. Since the time delay timings of the terahertz pulses and the probe pulse light the pulse periods of which are slightly different from each other shift from each other and the difference increases. Therefore, the temporally expanded terahertz pulses are measured by high-speed sampling without using any mechanical stage for time delay scanning. The terahertz electric field time waveform measured by high-speed sampling with the measurement time window of the pulse period is subjected to time-scale conversion and Fourier transform.
Abstract:
A vulcanized rubbery polymer composition comprising a component (A) and a thermoplastic resin (B), wherein the component (A) comprises a hydrogenated copolymer (A-1), which is obtained by hydrogenating a copolymer comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of not less than 5% by weight and not more than 90% by weight, and which has a crystallization peak calorie measured by a differential scan calorimetry of not more than 2 J/g, and at least one vulcanizable rubber (A-2) selected from the group consisting of a copolymer (a1) comprising an ethylene unit and an α-olefin unit of 3 to 20 carbon atoms and a hydrogenated rubber (a2) obtained from a homopolymer rubber of at least one conjugated diene monomer or a copolymer rubber comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of less than 5% by weight.
Abstract:
Disclosed is a thermoplastic elastomer composition which comprises (A) a thermoplastic resin containing a polystyrene resin, (B) a rubber-like polymer obtained by partially or completely crosslinking an ethylene-&agr;-olefin copolymer and (C) a compatibilizing agent, the amount of the component (B) being 40-90 parts by weight and the amount of the component (C) being 0.1-40 parts by weight based on 100 parts by weight of the components (A), (B) and (C) in total. According to the present invention, an elastomer composition excellent in abrasion resistance can be provided.
Abstract:
The present invention provides a high-strength galvanized steel sheet with maximum tensile strength of 900 MPa or more. The high-strength galvanized steel sheet has an alloyed galvanized layer formed on a surface of a base steel sheet containing predetermined amounts of C, Si, Mn, P, S, Al, N, O with a balance being constituted of iron and inevitable impurities, in which in a structure of the base steel sheet, retained austenite is limited to 8% or less in volume fraction, kurtosis K* of the hardness distribution between 2% hardness and 98% hardness is −0.30 or less, a ratio between Vickers hardness of surface layer of the base steel sheet and Vickers hardness of ¼ thickness of the base steel sheet is 0.35 to 0.70, and a content of iron in the alloyed galvanized layer is 8 to 12% in mass %.