Kawasaki Jukogyo Kabushiki Kaisha

Sumitomo Metal Industries, Inc.

Daido Tokushuko Kabushiki Kaisha

Yukio Nishiyama

Junzo Fujioka

Haruki Hino

Takuya Miyashita

Tomoji Kawai

Toshiharu Noda

Hitoshi Tabata

Toshio Atsuta

Susumu Isobe

Minoru Yokoyama

Shichio Kawai

Masaru Nishiguchi

Osamu Murata

Shoji Tanaka

Yuji Matsuzaki

Shoichiro Tsugaki

Masayuki Sakiyama

Yasutaka Toya

Tomoo Miyasaka

There is provided in a process for depositing a metal oxide superconducting film on a substrate by laser sputtering, the improvement which comprises carrying out the deposition of the metal oxide superconducting film in the presence of a gas having higher oxidation potential than oxygen.

Production of oxide superconducting films by laser sputtering using N.sub.2

A superalloy disk to be utilized for a rotating body of an aircraft or turbine engine is manufactured by a casting mold provided with a cavity having an inner shape for forming a disk. A molten bath of superalloy melted under a vacuum or an inert gas atmosphere is poured into the casting mold under a vacuum or an inert gas atmosphere and the casting mold with the molten bath is stirred so as to prepare a rough casting of fine crystal grains by applying an external force such as an eccentric centrifugal force. The thus produced disk material may be heated thereafter. The rough casting is formed of crystal grains less than 100 .mu.m in diameter, and a rate of strain during the rotational forging is less than 10.sup.0 /sec. amd more than 10.sup.-2 /sec.

Method and system for manufacturing superalloy disk

A plural number of types of material powders are accommodated in an accommodation chamber in a mixed state and the material powders are continuously subjected to a self-exothermic reaction inducing chemical reactions between the material powders caused by heat of reaction released when the mixed material powders synthesize. The synthesized material of high temperature due to the self-exothermic reaction is pressed by utilizing an electromagnetic force just after the finish of the self-exothermic reaction. The exothermic reaction is caused by an ignition circuit including an ignition electrode and the electromagnetic force is generated by an electromagnetic force generation circuit including an electric current inducing means. These circuits are connected through and regulated by a relay circuit. Thus the synthetic products of fine structure are obtained.

Method and apparatus for manufacturing synthetic products

Disclosed are Ti-Al alloys having increased ductility and Ti-Al alloys having increased ductility and lowered melting points, in both of which the main constituent phase is an intermetallic compound, TiAl. The Ti-Al alloys having increased ductility essentially consisting of Al: 28-38%, and B: 0.005-0.3%, the balance being Ti and inevitable impurities. Since the alloys of this type have good processability, they are suitable as materials for mechanical parts of rotating or reciprocating systems, where high heat-resistance and high specific strength are required. The Ti-Al alloys having increased ductility as well as lowered melting points essentially consisting of Al: 28-38%, one or two of Ni: 0.05-3.0% and Si: 0.05-3.0%, and the balance being Ti and inevitable impurities. Optionally, this alloy further contains B: 0.005-0.3%. The alloy of this type is, in addition to the above use, suitable for producing machine parts made by precision casting technology.

Ti-Al intermetallics containing boron for enhanced ductility

A composite follow valve for internal combustion engines such as an intake and an exhaust valve and the method for producing the same are disclosed. The valve is produced by integrating into the whole a valve head portion molded from a lightweight, heat-resistant material selected from a group of titanium alloys and titanium-aluminium alloys, a stem portion molded from a high-strength alloy steel, made hollow inside to reduce weight, and a stem end portion molded from a hard material selected from a group of martensitic stainless steel, silicon nitride and silicon carbide ceramics. Since the different materials of the separate valve components are selected to meet the requirements of their particular functions and operating condition under which they are placed. Also, because of this separate arrangement, the valve can be produced at a relatively reduced cost, since the use of expensive materials is saved. Furthermore, the valve is molded, not in a whole body, but in separate components, there is no use for expensive isothermal forging machines as in the case of prior art production methods.

Composite valve for reciprocating engines and method for manufacturing

A method of manufacturing a rock bit cone having a substantially conical body on a surface of which a number of teeth are formed is manufactured by pressure-casting with using a casting mold having a molding surface including a cone body defining surface portion and tooth defining surface portions, pouring a molten metal of very hard and low melting point alloy having a melting point of 1040.degree.-1120.degree. C. and Rockwell hardness of 55-65 to the casting mold to centrifugal-cast at least a predetermined area including a tip of each tooth with the hard metal, and pouring a molten tough metal to the casting mold to centrifugal-cast the cone body.

Method of manufacturing a rock bit cone

Growing community of inventors

Akashi, Japan

Yukio Nishiyama