A kind of mold and technology for preparing amorphous ring

Abstract

The invention belongs to the field of amorphous alloy materials, and in particular, relates to a mold for preparing an amorphous ring and a process thereof. The mold comprises a cylindrical body; the cylindrical body consists of a molten pool section, a middle core section and a base section arranged in sequence from top to bottom; the molten pool section adopts a material of pure copper; and the middle core section and the base section adopt materials of steel, aluminum and aluminum alloys, titanium and titanium alloys or magnesium and magnesium alloys. The preparation process comprises the following steps: firstly, a master alloy is heated for melting under the condition of high vacuum; then, a master alloy melt is quickly sucked in a core-carried split metal mold by a sucking casting method; after the master alloy melt is cooled, an amorphous body is demolded; and finally, the amorphous body is cut to form a ring shape for polishing. The taper of a core is 1-2 degrees, so that the demolding is convenient. The amorphous ring preparation method is near final molding, simple, reliable and fast in cooling speed, can be matched with a non-self-consumption vacuum arc smelting furnace more conveniently, and is controllable in process, excellent in surface molding, high in product surface quality, high in yield and suitable for batch production.

Description

technical field [0001] The invention belongs to the field of amorphous alloy materials, and in particular relates to a mold for preparing an amorphous ring and a process thereof. Background technique [0002] Amorphous alloy (metallic glass) is a new type of metal material with special atomic arrangement and excellent performance. Different from the long-range ordered atomic arrangement of traditional metal materials, the atomic arrangement of amorphous alloys has the structural characteristics of long-range disorder and short-range order, and there are no defects such as grain boundaries and dislocations in its microstructure. Therefore, amorphous alloys exhibit excellent properties such as high strength, high hardness, high elastic limit, low modulus, and corrosion resistance that cannot be compared with traditional crystalline alloys. At the same time, amorphous alloys have a smooth surface, so they are especially suitable for making rings, etc. jewelry pieces. [0003]...

AI Technical Summary

Problems solved by technology

Although this method can obtain bulk amorphous with complex shapes, it is not suitable for precious metal alloy systems such as gold-based or silver-based alloys due to poor thermal conductivity, low strength and low surface roughness of the mold material, which requires high amorphous forming ability. At the same time, there are many amorphous defects prepared by this method, and the surface needs further treatment to appear metallic color. The preparation process of high-pressure casting method and copper mold casting is similar, and both can form non-crystalline objects with solid structure. For crystal structure parts, the copper mold is divided into upper and lower parts, and it is impossible to make amorphous hollow structures such as rings.

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