Abstract: A steel for a tracked undercarriage component is used as a material constituting a track link (9), for example, and contains: not less than 0.39% by mass and not more than 0.45% by mass of carbon, not less than 0.2% by mass and not more than 1.0% by mass of silicon, not less than 0.10% by mass and not more than 0.90% by mass of manganese, not less than 0.002% by mass and not more than 0.005% by mass of sulfur, not less than 0.1% by mass and not more than 3.0% by mass of nickel, not less than 0.70% by mass and not more than 1.50% by mass of chromium, and not less than 0.10% by mass and not more than 0.60% by mass of molybdenum, with the balance made of iron and unavoidable impurities.

Abstract: A steel for a tracked undercarriage component is used as a material constituting a track link (9), for example, and contains: not less than 0.39% by mass and not more than 0.45% by mass of carbon, not less than 0.2% by mass and not more than 1.0% by mass of silicon, not less than 0.10% by mass and not more than 0.90% by mass of manganese, not less than 0.002% by mass and not more than 0.005% by mass of sulfur, not less than 0.1% by mass and not more than 3.0% by mass of nickel, not less than 0.70% by mass and not more than 1.50% by mass of chromium, and not less than 0.10% by mass and not more than 0.60% by mass of molybdenum, with the balance made of iron and unavoidable impurities.

Abstract: A method of fabricating a thermoelectric element of enhanced thermoelectric performance is provided by improving the preparation of thermoelectric material and employing hot plastic working in combination. The method comprises the step (a) of mixing and heat-melting a raw material of a predetermined composition; the step (b) of turning the heat-melted material 106 into microglobules by either of scattering and spraying, and then quenching the microglobules, thereby providing a globular powdery thermoelectric material; and the step (c) of plastically deforming the thermoelectric material in a hot condition, thereby to bring crystal grains of the thermoelectric material into a crystal orientation affording an excellent figure of merit.

Abstract: A method of fabricating a thermoelectric element with a higher thermoelectric performance than that of a conventional thermoelectric element. This fabrication method includes the steps of: (a) preparing a thermoelectric material having a predetermined composition; and (b) applying extruding pressure to the thermoelectric material in a first direction to extrude it through a die having, in an area which is not less than half of a deforming area of the thermoelectric material in the first direction, a maximum strain rate within +30% of an average strain rate so as to plastically deform the thermoelectric material into an extruded product of the thermoelectric material.

Abstract: A method of fabricating a thermoelectric element of enhanced thermoelectric performance is provided by improving the preparation of thermoelectric material and employing hot plastic working in combination. The method comprises the step (a) of mixing and heat-melting a raw material of a predetermined composition; the step (b) of turning the heat-melted material 106 (in FIG. 2) into microglobules by either of scattering and spraying, and then quenching the microglobules, thereby providing a globular powdery thermoelectric material; and the step (c) of plastically deforming the thermoelectric material in a hot condition, thereby to bring crystal grains of the thermoelectric material into a crystal orientation affording an excellent figure of merit.

Abstract: To provide a method for manufacturing a thermoelectric semiconductor material or a thermoelectric semiconductor element and method for manufacturing a thermoelectric module effective in improving thermoelectric performance. The thermoelectric semiconductor material is manufactured by producing a laminated body of thin powders manufactured by a quenching roller method, and compressing simultaneously the side surfaces of the laminated body using a secondary punch.

Abstract: In a die for molding a glass member, a ceramic die for glass molding characterized by having the press surfaces thereof formed of a boron type composite ceramics comprising (A) at least one M.sup.I B ceramic phase having a B.sup.I /B (wherein M.sup.I stands for at least one member selected from the group consisting of Ni, Cr, V, Nb, Ta, Mo, W and Mn) atomic ratio of 1/1 and (B) at least one IV-group diboride ceramic phase selected from the group consisting of TiB.sub.2, ZrB.sub.2, and HfB.sub.2 and/or (Cr, Ni).sub.3 B.sub.4 ceramic phase. This glass molding die excels in durability, ability of mold release, molding accuracy, and productivity and, at the same time, fits the molding of any of a rich variety of species of glass.