Mazda Motor Corporation

Tokyo Institute of Technology

Hiroshima University

Seiji Nomura

Yukihiro Sugimoto

Satoshi Nanba

Yukio Yamamoto

Akihide Takami

Fumihiko Saito

Toshiyuki Gendou

Shinsuke Shimizu

Shinya Shibata

Hiroyuki Ohta

Atsushi Sakamoto

Takashi Yamamoto

Kumiko Okazaki

Koichi Hori

A microorganism having at least one SPX gene encoding SPX protein responsive to phosphorus deficiency, and characterized in that a function of the SPX protein is decreased or lost by introducing gene mutation into the SPX gene.

Microorganism and method for producing triacylglycerol

Via a first path (P ) which extends for continuous treatment from one longitudinal end to the other of a cylinder head (H) passing between pairs of exhaust ports ( ) and pairs of intake ports ( ) opposed to each other with respect to one cylinder and which terminates in a tension bolt hole ( ), and via second paths (P P ) which, after treatment by this first path (P ), extend for successive treatment from cylinders adjacent the terminal point of the first path (P ) and between a pair of exhaust ports ( ) and a pair of intake ports ( ) opposed to each other and which terminate in tension bolt holes ( ), the surface of the cylinder head (H) is stirred for refining without melting it by the heat from a rotating tool.

Surface treating method, and treating member therefor

When a seat ( ) (FIG. A) on which a wax layer ( ) is formed via a melting reaction layer ( ) is brought into contact with a head ( ) and heated and pressed in this state, a melting reaction layer ( ) forms below the wax layer (FIG. B). When electric current application and pressing are continued from this state, a wax which has not reacted in the wax layer ( ) in the formation of the melting reaction layer ( ) is discharged from between the melting reaction layers ( ) and ( ). When electrical current application and pressing are further continued from this state, the two melting reaction layers ( ) and ( ) diffuse each other. The result is that a ternary alloy bonding layer ( ) containing Fe, Al, and Zn, which constitute the melting reaction layers ( ) and ( ) is formed between the seat ( ) and the head ( ) (FIG. D).

Metal welding method and metal bonding structure

In order to provide a method of joining a cylinder head,and a valve seat,by press and heat generated on passing an electrical current through both members,to achieve satisfactory joining with minimized heat generated inside when the current is supplied, while eliminating the need for an infiltration step and reduce the production cost, inhibiting an increase in thermal conductivity of the valve seat,and improving the wear resistance thereof. The valve seat,is made of a sintered material made from a powdery material with a high electrical conductivity element such as Cu dispersed therein. The current and the pressure are applied with a first joining surface,of the valve seat,and a joining surface,of the cylinder head body,being put into surface contact with each other in advance.

Joined metal member and method of joining said member

Quality localized surface treatment such as remelting a surface portion of a work by electric heating can be achieved easily by supplying electric current between an energization electrode and the work while holding the distal end portion of the energization electrode nearly in close contact with the surface portion. Localized heating can be successfully accomplished by electric heating based on the heat generated from the self resistance of the energization electrode itself and the heat generated from the contact resistance at the interface between the distal end portion of the energization electrode and the surface portion.

Electric heating treatment method, electric heating treatment apparatus, and electrode for electric heating treatment apparatus

The present invention provides a method for joining two metal members into a joined metal member. The method comprise steps of; applying a brazing material having a higher melting point than both the members on the surface of a first metal member and heating them to form a brazing material on said surface and a braze-diffusion layer under the brazing material in the surface area of the first member; and, then, pressing the first and another second metal members between which the brazing material is interposed during heating at a higher temperature than said melting point of the brazing material to squeeze the molten brazing material out between both the contact surfaces of both the metal members, therefor the two metal members being joined by the braze diffusion layers formed in both the surfaces into the joined metal member. Particularly, the first metal member may comprise an iron-based alloy and the second metal members may comprise an aluminum-based alloy, and the brazing material may be zinc-containing material such as Zn&mdash;Al eutectic alloy.

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Kure, Japan

Seiji Nomura