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Fast quenching amorphous alloy ribbon and preparation method thereof

A kind of amorphous alloy, thin strip technology, applied in the field of rapid quenching amorphous alloy thin strip and its preparation

Inactive Publication Date: 2010-09-29
AT&M AMORPHOUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such techniques can only yield strips 34-46 microns thick with a barely acceptable surface finish

Method used

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  • Fast quenching amorphous alloy ribbon and preparation method thereof
  • Fast quenching amorphous alloy ribbon and preparation method thereof
  • Fast quenching amorphous alloy ribbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Use industrial pure iron, niobium-iron alloy containing 60-68% niobium, industrial crystalline silicon and boron-iron alloy, and electrolytic copper as ingredients Fe73.5Cu1Nb3Si13.5B9 by atomic percentage, and melt it into a master alloy in a vacuum furnace. In the 2-pack method ( The induction ladle and nozzle bag) are melted twice, the tapping temperature is 1400°C, the liquid level of the nozzle bag is kept at 400 mm, and the nozzle slot width is 0.4 mm. Due to the increase of the liquid level, the pressure inside the molten pool is increased, forming a "convex" shaped molten pool, the surface finish of the strip is obviously improved, and the thickness of the strip can reach 24 microns. The composition and temperature of the comparative example are the same, while the comparative example adopts a low liquid level of 200mm, and a nozzle gap with a width of 0.7mm must be used, and a "convex" shaped molten pool cannot be formed, resulting in the thickness of the strip ...

Embodiment 2

[0096] Use industrial pure iron, ferroniobium alloy containing 60-68% niobium, industrial crystalline silicon and boron-iron alloy, and electrolytic copper as ingredients Fe73.5Cu1Nb3Si16.47B6Al0.02Ti0.01 in atomic percentage, and melt it into a master alloy in a vacuum furnace. In the bag method (induction ladle and nozzle bag) secondary melting, the tapping temperature is 1400°C, the nozzle bag is sealed, the liquid level is kept at 400mm, high-pressure gas is applied inside, the pressure is 0.02MPa, and the nozzle slit width is 0.3mm. Due to the further increase of the internal pressure of the molten pool and the reduction of the nozzle gap, the surface finish of the strip is significantly improved, and the thickness of the strip can be reduced to 22 microns. Due to the thinning of the strip, the high-frequency loss of the material is greatly reduced, and the composition of the comparative example is the same, but the content of Ti and Al is not controlled, the tapping tempe...

Embodiment 3

[0101] Industrial pure iron, industrial crystalline silicon and boron-iron alloy are used as ingredients according to the atomic percentage of Fe79Si9B11.96Al0.04, melted into a master alloy in a vacuum furnace, and secondary melted in the 2-pack method (induction ladle and nozzle package), and the tapping temperature 1400°C, keep the temperature of the molten pool at 1280°C, seal the nozzle bag, keep the liquid level at 200 mm, use a suction fan at the nozzle to create negative pressure, and the width of the nozzle slit is 0.3 mm, forming a "convex" shaped molten pool, and the thickness of the tape made is 22 microns. Depend on Image 6 Micrographs of the strip surface shown show less air bubbles and a high surface finish.

[0102] The conditions of the comparative example are consistent with the above, only the suction fan is closed, it is difficult to unpack the spray belt, no "convex" shaped molten pool is formed, and only a small amount of strip material is ejected to te...

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Abstract

This invention belongs to the field of metal material preparation, in particular relates to a fast quenching amorphous alloy ribbon and a preparation method thereof. The preparation method of the fast quenching amorphous alloy ribbon comprises the steps of batching, vacuum melting, secondary melting, ribbon spouting and collecting, and the chemical components are 70 to 85 percent of Fe, 0.001 to 4 percent of Nb, or at least one of Nb, Mo, W, V and Ta, 0.001 to 25 percent of Si, 0.001 to 15 percent of B, 0.001 to 2 percent of Cu, 0.005 to 0.08 percent of at least one of Al and Ti according to the atomic percent. In the ribbon spouting step, a dynamic stable arc weld pool with the both ends protruding outward is formed between a nozzle and a cooling roller, and the temperature of the weld pool is 1180 to 1300 DEG C; the width D of the nozzle gap is 0.1 to 0.4 millimeters, and the space length between the cooling roller and the nozzle is 0.1 to 0.4 millimeters; the thickness of the ribbon is 18 to 24 micrometers, and the roughness Ra is smaller than 2 micrometers. The ribbon has very thin thickness, excellent surface quality and magnetic property, and is suitable for producing high-quality magnet core elements. The ribbon is particularly suitable for being used under high frequency, and has lower high frequency loss and better frequency characteristics.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to an amorphous alloy thin strip and a preparation method thereof, in particular to a rapidly quenched amorphous alloy thin strip and a preparation method thereof. Background technique [0002] In the process of single-roll spraying, the molten metal is sprayed from the narrow gap of the nozzle onto the roll surface of the rotating cooling roll that is close to it, and an amorphous alloy strip is formed due to rapid cooling. In the prior art, due to the limitations of the process and equipment conditions, most of them can only spray 34-46 micron thick amorphous alloy strips. This is because the nozzles are easily absorbed by the molten metal Impurities clog and stop the spray belt. In order to prevent nozzle clogging, relatively wide nozzles are often used, with a width of 0.6-1.2 mm, so as to ensure smooth spraying when the temperature of the molten metal is n...

Claims

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Application Information

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IPC IPC(8): B22D11/06
Inventor 王立军刘国栋陈文智王六一
Owner AT&M AMORPHOUS TECH CO LTD
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