Abstract: A metal base plate material includes trip-shaped first regions each having a plurality of first ridges arranged substantially parallel to each other and at substantially equal intervals such that an angle of intersection with a longitudinal direction is greater than or equal to 10° and less than or equal to 25°. Strip-shaped second regions each have a plurality of second ridges arranged substantially parallel to each other and at substantially equal intervals and angled to face the plurality of the first ridges in a crosswise direction. The first regions and second regions are separated by a gap regions therebetween, at substantially equal intervals. First ends on a downstream side of the plurality of the first ridges and second ends on a downstream side of the plurality of the second ridges are positioned differently from each other in the longitudinal directions.

Abstract: An aspect of the present invention is a production method of a rolled sheet for cold-rolling, the method being characterized by including: a hot-rolling step for forming a rolled sheet by hot-rolling a pure titanium material while coiling; and an annealing step for annealing the hot-rolled sheet after the hot-rolling step, the coiling temperature in the hot-rolling step being 500° C. or less, and the annealing step being controlled so that the percentage area of recrystallized grains in the microstructure of the hot-rolled sheet after annealing is at least 90% and the mean grain size of the recrystallized grains is 5 ?m to 10 ?m.

Abstract: Disclosed is a titanium alloy sheet for electrode, including at least one of 0.1 to 1.0% by mass of Al and 0.1 to 1.0% by mass of Si, with the balance being Ti and inevitable impurities, wherein the total content of Al and Si is 0.2 to 1.0% by mass and an average grain size is 5 to 20 ?m.

Abstract: An aspect of the present invention is a production method of a rolled sheet for cold-rolling, the method being characterized by including: a hot-rolling step for forming a rolled sheet by hot-rolling a pure titanium material while coiling; and an annealing step for annealing the hot-rolled sheet after the hot-rolling step, the coiling temperature in the hot-rolling step being 500° C. or less, and the annealing step being controlled so that the percentage area of recrystallized grains in the microstructure of the hot-rolled sheet after annealing is at least 90% and the mean grain size of the recrystallized grains is 5 ?m to 10 ?m.

Abstract: To provide an ?-? titanium alloy that has high strength and excellent hot workability of the level of the ?-? titanium alloy, typified by the Ti-6Al-4V, while exhibiting more excellent machinability than the Ti-6Al-4V. The ?-? titanium alloy includes, in percent by mass: at least one element of 0.1 to 2.0% of Cu and 0.1 to 2.0% of Ni; 2.0 to 8.5% of Al; 0.08 to 0.25% of C; and 1.0 to 7.0% in total of at least one element of 0 to 4.5% of Cr and 0 to 2.5% of Fe, with the balance being Ti and inevitable impurities.

Abstract: Provided are a welded titanium tube capable of improving heat-transfer performance and detecting surface defects and a manufacturing method therefor. The welded titanium tube is formed of a tubular-shaped titanium plate, whose edges are butt-welded. The welded titanium tube includes an outer peripheral surface and an inner peripheral surface, at least one of which is provided with a concavo-convex pattern including a base surface and a plurality of protrusions. A mean maximum height of the protrusions is in the range of 12 to 45 ?m. A ratio of a maximum value to a mean pitch of the protrusions is less than 2. A ratio of a mean maximum dimension of the protrusions to the mean pitch is 0.90 or less, and a ratio of the mean maximum height to a wall thickness is 0.11 or less.

Abstract: A plate for a heat-exchanging plate comprises a metallic flat plate having fine irregularities formed on a surface thereof, the metallic flat plate obtained through press-working which is implemented as a post-process, of the flat plate. The irregularities include a plurality of projections that are formed at a predetermined spacing, and the plurality of projections includes first ridges disposed at an angle +? with respect to a width direction of the plate and second ridges disposed at an angle ?? with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.

Abstract: A cermet has a hard phase which contains W and nitrogen, and includes at least one selected from a carbide, nitride and carbonitride of a metal having Ti as a main component, and a binder phase having an iron group metal as a main component. A W amount contained in the whole cermet is 5 to 40% by weight, an interfacial phase including a complex carbonitride with a larger W amount than a W amount of the hard phase being present between grains of the hard phase, and when a W amount contained in the interfacial phase based on the whole metal element is represented by Wb (atomic %), and a W amount contained in the hard phase based on the whole metal element is represented by Wh (atomic %), then, an atomic ratio of Wb to Wh (Wb/Wh) is 1.7 or more. The cermet is excellent in fracture resistance and wear resistance.

Abstract: A cermet has a first hard phase of a complex carbonitride solid solution, a second hard phase of WC, and a binder phase mainly comprising Co and Ni as main component(s). The first hard phase has a core/rim structure. The core is represented by (Ti1-x-yLxMoy)(C1-zNz) and the rim is represented by (Ti1-a-b-dRaMobWd)(C1-eNe), wherein L and R each represent at least one element selected from the group consisting of Zr, Hf, Nb and Ta. If a maximum thickness of the rim of the core/rim structure grains of the first hard phase is given by rmax, and a minimum thickness of the rim of the core/rim structure grains of the first hard phase is given by rmin, a number of the core/rim structure grains of the first hard phase satisfying 0.2<(rmin/rmax)<1 is 85% or more, based on the total number of the core/rim structure grains of the first hard phase.

Abstract: A cermet has a WC first hard phase, a second hard phase including one or more of a carbide, nitride and carbonitride of an element(s) of groups 4, 5 and 6 of the Periodic Table including a titanium element, and a mutual solid solution thereof, and a binder phase. In the cermet, a carbon amount CT (% by weight), a tungsten amount CW (% by weight), and a nitrogen amount CN (% by weight) satisfy 0.25<(CN/(CT?0.0653·CW))<6. The cermet has a surface region with a thickness of 5 to 100 ?m which includes the first hard phase and the binder phase, and an inner region which includes the first and second hard phases and the binder phase. In a cross-section of the inner region, a ratio of an area of the first hard phase to an area of the second hard phase is 0.15 to 4.

Abstract: A cermet has a hard phase which contains W and nitrogen, and includes at least one selected from a carbide, nitride and carbonitride of a metal having Ti as a main component, and a binder phase having an iron group metal as a main component. A W amount contained in the whole cermet is 5 to 40% by weight, an interfacial phase including a complex carbonitride with a larger W amount than a W amount of the hard phase being present between grains of the hard phase, and when a W amount contained in the interfacial phase based on the whole metal element is represented by Wb (atomic %), and a W amount contained in the hard phase based on the whole metal element is represented by Wh (atomic %), then, an atomic ratio of Wb to Wh (Wb/Wh) is 1.7 or more. The cermet is excellent in fracture resistance and wear resistance.

Abstract: A hard powder contains much amount of a complex carbonitride solid solution, which can improve sinterability of a sintered hard alloy and give a uniform structure. The hard powder is a powder containing 90 vol % or more of a complex carbonitride solid solution represented by (Ti1-x,Mx)(C1-y,Ny), wherein M represents at least one element selected from the group consisting of W, Mo, Nb, Zr and Ta, x represents an atomic ratio of M based on the sum of Ti and M, y represents an atomic ratio of N based on the sum of C and N, x and y satisfy 0.05?x?0.5 and 0.01?y?0.75.