Mazda Motor Corporation

Toyo Kogyo Co., Ltd.

Primetals Technologies Japan, Ltd.

Junichi Yamamoto

Yoshifumi Yamamoto

Kouji Tarumoto

Toshiro Yagi

Tsutomu Shimizu

Katsuya Ohuchi

Ken Okazaki

Kazuo Satou

Hideo Kohara

Toshio Yagi

Kiyokazu Inmaru

An operation support apparatus for a heat-treatment furnace for heat-treating a metal plate continuously includes a required time calculation unit configured to calculate, based on a current furnace temperature which is a current temperature of the heat-treatment furnace, a current line speed which is a current conveyance speed of the metal plate, and a target line speed which is a conveyance speed of the metal plate to be changed from the current line speed, an estimated required time until a temperature of the heat-treatment furnace reaches, from the current furnace temperature, a target furnace temperature which is a temperature of the heat-treatment furnace corresponding to the target line speed, and a first output unit configured to output the estimated required time calculated by the required time calculation unit.

Operation support apparatus and operation support method for heat-treatment furnace, and a heat-treatment facility and operation method therefor

A valve driving mechanism of which a rocker arm is provided at one end portion with a roller brought into a rotative contact with a cam surface of a cam for driving engine valves. The cam consists of 2.0-4.0 wt % of C, 1.5-3.5 wt % of Si, 0.1-1.0 wt % of Mn, 0.005-0.08 wt % of Mg, less than 0.15 wt % of P, less than 0.15 wt % of S, 0.3-1.0 wt % of Cu, 0.03-0.09 wt % of Mo with the balance of Fe, with a matrix of the cam being a granular graphite cast iron having a mixed structure of 30-50 vol % of residual austenite structure and a bainite structure.

Mechanical parts of valve driving mechanism for internal combustion

A slide contacting member which is subjected to slide contact with a counter member. The slide contacting member is made by applying a hard layer, e.g., chromium, onto a parent material, irradiating the hard layer with a high energy density laser beam onto the plating under conditions such that concavities having a softened layer are formed thereon, the concavities being used to keep oil during the contact with the other member. The hard layer is finished grinded after irradiation.

Slide contacting member and production method therefor

A rotor housing for a rotary piston engine having improved gas sealing property between the inner surface and apex seals mounted on a rotor. The rotor housing has an inner surface applied with a hard layer such as chrome plating. The portions of the hard layer surrounding openings of plug holes at the inner surface side are formed with softened areas having lower hardness than the apex seals. The softened areas can be made by a high-energy beam such as a laser beam. Should portions surrounding the openings of the plug holes be thermally deformed to project inward and scratch the apex seals, the projected portions formed of the softened areas will be worn before the apex seals. Hence, uneven wearing of the apex seals can be avoided, which prevents degradation of the gas sealing property and consequently prevents drop in the compression pressure in the working chambers.

Rotor housing for a rotary piston engine having softened areas

A method for manufacturing an apex seal for a rotary piston engine comprising steps of preparing an apex seal blank made of ceramic material, and applying a high energy heating radiation to the sliding surface of the apex seal blank to form a roughened and porous structure on the surface portion of the apex seal blank. The high energy heating radiation is desirably applied to the apex seal blank under a non-oxidizing atmosphere so that an oxidization of the components of the ceramic material can be prevented.

Method for manufacturing an apex seal for a rotary piston engine using

The disclosure relates to a method of forming aluminum coating layer on surface of a ferrous base alloy workpiece which includes the steps of applying onto the surface of the ferrous base alloy workpiece a coating solution containing 50 to 90% by weight of aluminum or aluminum alloy particles and 10 to 50% by weight of synthetic resin having a high decomposition burning temperature with slow burning speed and being soluble in a solvent at normal temperature, with subsequent drying to form a resin coating layer containing aluminum on the surface of the ferrous base alloy workpiece, and then subjecting the workpiece thus treated to heating up to temperature higher than melting point of the aluminum or aluminum alloy particles so as to form an Al plated coating layer on the surface of the ferrous base alloy workpiece.

Method of forming aluminum coating layer on ferrous base alloy workpiece

The invention relates to a method of forming aluminum diffusion layer including the steps of dipping a ferrous base alloy workpiece containing nickel of more than 8.0% by weight in a molten metal bath of aluminum or aluminum alloy having temperature of 650.degree. to 750.degree. C. for 30 to 120 seconds, subjecting the ferrous base alloy workpiece thus treated to a first heat treatment at temperature from 750.degree. to 850.degree. C. for at least 60 minutes, subsequently subjecting the ferrous base alloy workpiece thus treated to a second heat treatment at temperature of 900.degree. to 1000.degree. C. for at least 30 minutes, and further subjecting the ferrous base alloy workpiece thus treated to a third heat treatment under predetermined conditions at set temperatures and durations for the separation of an aluminum compound layer formed on the workpiece and for the formation only of aluminum diffusion layer on the surface of the workpiece.

Aluminum diffusion layer forming method

Method of fabrication of material suited for use in a thermal reactor according to which austenitic stainless steel is dipped in a bath of molten aluminium in addition of silicon and then receives heat treatment in specific temperature ranges, whereby preferential diffusion of silicon in the steel material is effected. The diffused silicon prevents diffusion of aluminium and ensures that thickness of plating layers remains at a value such that distortion of a plated element does not occur even after prolonged service.

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Hiroshima, Japan

Junichi Yamamoto