Preparation method of amorphous alloy fiber and device for implementing the preparation method

Abstract

The invention provides a preparation method of an amorphous alloy fiber and a device for implementing the preparation method. The preparation method utilizes superplasticity of an amorphous alloy material. The preparation method comprises the following steps of fixing one end of an amorphous alloy material such as a bar, a wire or a band, connecting the other free end of the amorphous alloy material to an external force supplement device, arranging a heater for heating the amorphous alloy material between the two ends, when the temperature of the amorphous alloy material is in a sub-cooled liquid phase region range from a glass transition temperature to an initial crystallization temperature and is increased to a softening temperature, starting the external force supplement device, and slowly drawing the free end by the external force supplement device so that the amorphous alloy material produces plastic deformation and forms amorphous alloy fibers. The preparation method is simple and feasible, has a low cost, can prepare the amorphous alloy fibers with small diameters and can widen an amorphous alloy fiber application scope.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and in particular relates to a preparation method of amorphous alloy fibers and equipment for realizing the preparation method. Background technique [0002] In 1960, American scientist Duwez first prepared Au by spray gun cooling method. 75 Si 25 Amorphous alloys (W.Klement, R.H Wilens, and P.Duwez, Nature., 181 (1960) 869-870), since then humans have come into contact with amorphous alloys, and with the help of modern scientific theories and experimental methods, they have realized that amorphous alloys Due to the lack of defects such as grain boundaries, the alloy has excellent properties that traditional crystalline alloy materials do not have, such as: high fracture strength, high hardness, high wear resistance and high corrosion resistance. In addition, certain Fe-based, Co-based or Ni-based amorphous alloys also exhibit excellent magnetic properties. For example, the giant magnetoimpedan...

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Problems solved by technology

However, there are still many deficiencies in the cold drawing process: First, the plasticity of amorphous alloys at room temperature is usually small, and the reduction of area of ​​the wire after a single cold drawing is limited, which means that if a relatively thin wire is prepared It needs to go through multiple processes; secondly, due to the limitation of the wire drawing die, the diameter of the cold-drawn wire is usually difficult to be less than 30 μm, so it is difficult to prepare thinner amorphous fibers; in addition, the axial stress applied by the cold-drawing process will make the wire The material produces a large anisotropy, and even slip lines appear on the surface of the wire

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