Technology and apparatus for making jet-type centrifugal rotary mould of great non-crystal ring parts

Abstract

A technology for manufacturing a great non-crystal ring part includes melting alloy, maintaining temp, spraying molten alloy into rotating mould, and solidifying in rotating mould under the action of centrifugal force to obtain said part. Its apparatus is composed of melting and spray pouring system of alloy, combined rotary mould and rotating system, and vacuum and air charging pressure control system. Its advantage is high productivity.

Description

technical field [0001] The invention relates to a manufacturing method of a ring-shaped bulk amorphous part. The molten liquid alloy is injected into a rotary mold, and the centrifugal force and the rapid heat conduction of the rotary mold are used to form an amorphous ring-shaped part. It includes a set of processes and the realization of the method. Craft device. Background technique [0002] Bulk amorphous refers to obtaining a strong intrinsic amorphous forming ability of the alloy through proper alloy composition design, and then preparing bulk amorphous with three-dimensional dimensions on the order of millimeters or more through certain technological processes and means. Bulk amorphous has extraordinary properties, such as high strength, high elasticity, high wear resistance and high corrosion resistance, so it can be used in many fields. At present, there are several methods for preparing large amorphous crystals, such as water quenching, vacuum suction casting, jet...

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Problems solved by technology

Utilizing the preparation method described above to manufacture ring-shaped bulk amorphous parts also requires subsequent processes, such as preparing ring-shaped amorphous parts by plastic deformation of amorphous plates or machining of amorphous rods, both of which have technological advantages. The disadvantages of complexity and high cost; what is more serious is that the method of plastic deformation must heat the amorphous plate, if the process control is not strict, it is easy to cause the crystallization of the amorphous, which will lead to the scrapping of the amorphous parts; processing the amorphous rod into For ring-shaped parts, the diameter of the ring-shaped part is limited by the diameter of the amorphous rod. Due to the limited ability of the alloy to form amorphous, the diameter of the amorphous rod cannot be very large, so the diameter of the ring-shaped part prepared by this method cannot be very large. , and machining causes a large amount of alloy to become waste, which reduces the utilization rate of materials

The Materials Research Institute of Tohoku University in Japan uses the extrusion method to prepare ring gear parts in the supercooled liquid phase region of bulk amorphous (Acta Metallurgica V46, 1998, p253-263). This method is used to have a wide supercooled temperature range. The effect of large amorphous crystals is better, but for large amorphous crystals with a narrow supercooling temperature range, the temperature fluctuation during the extrusion process is enough to cause crystallization and lead to the scrapping of large amorphous parts. Therefore, the temperature in the process The control requirements are very strict, which will greatly increase the manufacturing cost; more importantly, the hot extrusion method is difficult to prepare hollow bulk amorphous ring parts

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