Abstract: The present invention discloses a titanium-alloy substrate which is formed plastically by performing die casting and forging to alloyed titanium at least one time. The present invention is characterized in that this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure.

Abstract: The present invention discloses a titanium-alloy substrate which is formed plastically by performing die casting and forging to alloyed titanium at least one time. The present invention is characterized in that this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure.

Abstract: A cast molding method accomplishes the cast molding by a smelting chamber, a casting chamber, a hinge press system and a vacuum system. First, a metallic die is assembled in the casting chamber and then a metallic material is put in the smelting chamber. Next, the metallic material is heated up in a vacuum state and the casting chamber is pre-heated at a same time. After the metallic material in the smelting chamber has been melted down and the casting chamber has been vacuumized, the melted metallic material is filled into the metallic die, and then the hinge press system is turned on to cast mold the metallic die, resulting in a semi-solid product. After the semi-solid product has been cooled down, the product of cast molding is accomplished according to the present invention.

Abstract: A turbo-compound apparatus having a variable geometry turbocharger turbine and an engine system having the same are provided. The turbo-compound apparatus includes a variable geometry turbocharger turbine connected to an exhaust manifold of the engine and having an adjustable mechanism to distribute the exhaust energy between two turbines; a power turbine fitted downstream of the variable geometry turbocharger turbine and driven by exhaust gas passing through the variable geometry turbocharger turbine, an output end of the power turbine being adapted to connect with a crankshaft of the engine to transfer mechanical work output from the power turbine to the crankshaft; and an actuator configured to control the adjustable mechanism according to actual engine operation conditions to regulate the exhaust energy distribution between the variable geometry turbocharger turbine and the power turbine.