Iron base amorphous alloy and preparation method thereof

Abstract

The invention provides an iron base amorphous alloy expressed in a formula (I), wherein a, b, c, d and e respectively represent the atomic percentage contents of corresponding components: a is not bigger than 84.0 and not smaller than 80.5, b is not bigger than 9.0 and not smaller than 3.0, c is not bigger than 15.0 and not smaller than 8.0, d is not bigger than 0.3 and not smaller than 0.001, e is not bigger than 0.4, and the sum of a, b, c, d and e is 100; and M is an impurity element. In the iron base amorphous alloy provided by the invention, the saturation induction density of an alloy material is not lower than 1.62 T. The invention further provides a preparation method of the iron base amorphous alloy; further, the excellent soft magnetic properties can be obtained after proper heat treatment; the alloy material can be used for manufacturing iron core materials of power transformers, generators and engines; and FeaSibBcPdMe (I).

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on January 25, 2017, with the application number 201710060830.7 and the title of the invention "An Iron-based Amorphous Alloy and Its Preparation Method". technical field [0002] The invention relates to the technical field of soft magnetic materials, in particular to an iron-based amorphous alloy and a preparation method thereof. Background technique [0003] Iron-based amorphous strip is a new type of energy-saving material, which is prepared by rapid rapid cooling and solidification production technology. This new material is used in transformer cores. Compared with traditional silicon steel transformers, the magnetization process is quite easy, thereby greatly reducing the no-load of transformers. Loss, if used in oil-immersed transformers can also reduce CO, SO, NO emissions x And other harmful gases, known as the "green material" of the 21st century. [...

AI Technical Summary

Problems solved by technology

The most representative one is the alloy Metglas2605Co developed by Allied-Signal Company of the United States. The saturation magnetic induction of this alloy reaches 1.8T, but its alloy contains 18% Co element, which makes its cost too high to be used in industry. Application in production

[0006] Hitachi Metals discloses a Fe-Si-B-C alloy named HB1 in its Chinese patent application with publication number CN1721563A. C gas to control the distribution of C element content on the surface of the strip, which will directly lead to the difficulty in controlling the production process conditions of its products, and the stability of industrial production cannot be guaranteed.

[0007] Nippon Steel Corporation announced a Fe-Si-B-P-C alloy in the patent CN1356403A. Although its saturation magnetic induction intensity reaches 1.75T, it cannot be used in industrial production due to its high Fe content and poor amorphous formation ability. It forms an amorphous state, and the magnetic properties of the strip are poor; colleagues, on the one hand, did not mention the addition of P element in the patent, on the other hand, the content of P element addition is relatively large, combined with the actual situation of the domestic and foreign ferrophosphorus industry , the preparation conditions of ferrophosphorus are relatively extensive, and the impurity content is too high, which cannot meet the use conditions of amorphous alloys

In the preparation process, a large amount of ferrophosphorus under conventional conditions will lead to crystallization of the strip, partial brittleness, and poor performance after heat treatment

If this alloy composition is used for industrial production, it is necessary to add ferrophosphorus refining. On the one hand, the complexity of the process will be increased, and on the other hand, the current smelting level will need to be improved, making industrial production more difficult.

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