Centrifugal casting method for large depleted uranium flywheel

Abstract

The invention belongs to the technical field of depleted uranium part development and particularly relates to a centrifugal casting method for a large depleted uranium flywheel. A vacuum medium-frequency induction smelting furnace provided with a centrifugal casting device is prepared, a shell is connected with the smelting furnace in a sealed manner, and vacuum is maintained; a disc-shaped die is machined, and a layer of Y2O3 solution coating is brushed to the surface of an inner cavity of the die; a pouring cup is placed at the bottom of a crucible for cooperative use; depleted uranium and a depleted uranium alloy material with the density larger than 18 g / cm<3> are prepared, and the weight is 1000 kg; the crucible is arranged in the vacuum medium-frequency induction smelting furnace, and materials are loaded in to the crucible; the die dried to 100 DEG C is arranged into the centrifugal casting device and is fixed; a sieve tray is assembled over the center of the die; the centrifugal casting device and the smelting furnace are assembled in a sealed manner; vacuum pumping is conducted to be within 10 Pa, point sending heating begins, heating is conducted till the melting state is achieved, and the temperature is increased continuously; materials are heated to 1450 DEG C to 1500 DEG C, and heat preservation is conducted for 30 min; and a motor is started, and casting is conducted at the speed of 12.5 kg / s. the centrifugal casting method is suitable for preparing of hollow disc-shaped structure castings, and the material density can be improved.

Description

technical field [0001] The invention belongs to the technical field of development of depleted uranium parts, and in particular relates to a centrifugal casting method of a large depleted uranium flywheel. Background technique [0002] Depleted uranium and depleted uranium alloys have the characteristics of high density and excellent performance. Based on the characteristics of high density, they can be used as high-density energy storage flywheels and other products. The high-inertia balance flywheel is the key device of the shielded electric main pump of the world's third-generation nuclear power technology. Based on the design requirements for the operating inertia of the main pump of the nuclear power plant, it needs to be made of high-density materials. Its main role is that the reactor should maintain flow for a period of time after power loss to sufficiently cool the core. At the same time, the loss of equipment cooling water should not affect the idling ability, and...

AI Technical Summary

Problems solved by technology

Because of the large size of the product, the general casting method has higher requirements on the equipment. Since the casting is a flake product with a large diameter, it is easy to form defects such as pores and looseness during the casting process.

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