The present invention relates to a method of making a cemented carbide with submicron grin WO grain size consisting of WO, 6-12 wt-% Co and 0.1-0.7 wt-% Cr using conventional powder metallurgical technique mixing, pressing and sintering. According to the method the WC-grains are coated with Cr prior to mixing. As a result a cemented carbide with improved properties is obtained.

PROBLEM TO BE SOLVED: To improve a drain capacity by a method in which part of a filtrate discharge opening is covered to arrange a dam plate, a fringe part which makes the dam top of the dam plate is formed in the shape of an arc concentric with a liquid surface in a bowl. SOLUTION: The end wall part 3a of a bowl 2 is made a surface which crosses at right angles to the axis of the bowl 2, part of...

PROBLEM TO BE SOLVED: To provide a driving axle having a number of pieces of components smaller than that of a conventional one, with the low cost for the construction and manufacturing. SOLUTION: This axle comprises two reduction gears 17, 26 mounted on a drive motor 4 and an edge part of the axle, each reduction gear 17, 26 is respectively provided for driving every wheel, and the power from the...

PROBLEM TO BE SOLVED: To apply no braking force to driven wheels as a whole by providing a drive source applying the torque accelerating a driven wheel on the outer wheel side more than a driven wheel on the inner wheel side on a differential rotation generating means. SOLUTION: A differential rotation generating means 5 is provided between right and left driven rear wheels 4R, 4L. The differentia...

PROBLEM TO BE SOLVED: To practically prevent the control lag of an actual travel speed by setting the present actual travel speed of a vehicle as a target travel speed when the deceleration request state for decreasing the target travel speed of the vehicle is changed to the acceleration request state for increasing the target travel speed of the vehicle after the prescribed period. SOLUTION: When...

PROBLEM TO BE SOLVED: To sufficiently reduce combustive specific consumption and NOx while maintaining excellent operability of a vehicle. SOLUTION: A torque variation quantity of respective cylinders is detected on the basis of angular velocity of a crankshaft, and the reference air-fuel ratio is corrected by a lean feedback correction factor FLLFB so that a detected torque variation quantity bec...

PROBLEM TO BE SOLVED: To prevent a burden of a driving system from becoming excessive, and provide a torque characteristic to satisfy both a low speed stage and a high speed stage by variably controlling output torque of an engine according to a selected speed change stage of a transmission. SOLUTION: Output torque of an engine is increased/decreased according to a selected speed change stage of a...

PROBLEM TO BE SOLVED: To improve operational stability by restraining a driving wheel slip when departing on a low friction coefficient road surface in a vehicle having a continuously variable transmission. SOLUTION: When a switch signal SW of a snow mode switch is put in an OFF condition, speed change control is performed in a normal mode speed change pattern which can select the speed change rat...

PROBLEM TO BE SOLVED: To provide a clutch lever structure of a walking type farm working machine which can easily perform holding and releasing operation of a clutch lever to a clutch disengaging position. SOLUTION: A clutch lever 9 is arranged on an operation handle extending backward from a main machine so that longitudinal swinging and lateral swinging operation can be freely performed, and the...

PROBLEM TO BE SOLVED: To improve operability by preventing hunting of the speed change ratio even at brake actuating time in prescribed brake control. SOLUTION: An estimating means 74 estimates input torque of a continuously variable transmission 70 on the basis of engine output torque Te, and an operation means 75 performs an operation on a correction quantity to compensate for a difference in th...

PROBLEM TO BE SOLVED: To provide a hydrogen combustion turbine plant using a cooling system capable of reducing a decrease rate of power generating end efficiency in the hydrogen combustion turbine plant in which high temperature steam is generated by combustion of hydrogen and oxygen to drive a turbine, and the steam cools a turbine blade. SOLUTION: High temperature steam produced by combustion o...

PROBLEM TO BE SOLVED: To provide a method and a plant, for manufacturing methanol or dimethyl ether from a coal producing gas and achieving load standarization. SOLUTION: In an electric power plant provided with a coal gasifying device 10, a gas refining device 20, a methanol synthesizing device 30 composed of a methanol synthesizing part 31 and a methanol distillation part 32, a methanol storage ...

PROBLEM TO BE SOLVED: To decrease replacement frequencies of a filter for preventing a steam cooling passage from being clogged with solids dropped from a main steam system pipe, in a recovering-type steam cooled gas turbine. SOLUTION: A gas turbine system is constituted of a gas turbine 1, a compressor 3 and a generator 4, steam extracted from a high-pressure turbine 6 is allowed to flow in movin...

PROBLEM TO BE SOLVED: To simply and effectively improve a sucking and cooling sub system using ammonia as refrigerant and water as absorbent by obtaining large substantial sucking and cooling in a system having the low use of energy (the low cooling capacity) and by decreasing the effect on maintenance of an equipment, in a sucking and cooling sub system for cooling gas turbine intake air. SOLUTIO...

PROBLEM TO BE SOLVED: To secure the stabilized operation of a gas turbine at a high temperature part thereof while restraining the generation of drain at the time of starting operation or at the time of stop operation by maintaining the high temperature part of a gas turbine plant in the vacuum condition, and thereafter, performing the purge operation, warming-up operation, steam cooling operation...

PROBLEM TO BE SOLVED: To effectively remove impurity sticking to a steam cooling passage, concerning a method for cleaning the steam cooling system of a compound power plant. SOLUTION: In a compound power plant provided with a gas turbine system composed of a gas turbine 11, a compressor 12 and a generator 13, and in which exhaust gas is guided to an exhaust heat recovering boiler 14, steam is gen...

PROBLEM TO BE SOLVED: To reduce shock in starting even when an engine is started just after a traveling range is selected from a condition setting a shift lever in a N-range at the stopping time of a vehicle such as signal waiting. SOLUTION: The first check valve 108 is interposed in the first hydraulic pressure supplying circuit 41 communicating the first hydraulic pump 14 for engine driving with...

PROBLEM TO BE SOLVED: To restrain deterioration of drivability caused by limitation of regeneration. SOLUTION: When regeneration is not limited at the time of deceleration, a pump loss of an engine is reduced by setting a target opening &theta THO for a throttle valve to a substantially fully opened opening &theta THWOT(step S1513). On the other hand, when regeneration is limited, the pump loss is...

PROBLEM TO BE SOLVED: To determine materialization of an executing condition for stopping time control to reduce an engine speed to zero with a prescribed deceleration in a power output device used in a hybrid vehicle. SOLUTION: This power output device 110 is provided with a planetary gear 120, an engine 150 coupled with a crankshaft 156 to its planetary carrier, and a motor MG1 mounted on a sun ...

PROBLEM TO BE SOLVED: To satisfactorily restrain vibration generated in sudden acceleration commanding for a vehicle. SOLUTION: A fuel injection amount to an engine 12 is quickly increased to enhance torque of a crankshaft 14 when an acceleration pedal is actuated suddenly, force to twist an automobile 11 to the rotational direction of the shaft 14 is applied when rotation is transmitted from the ...