Iron-based soft-magnetic amorphous steel and application thereof

Abstract

The invention relates to iron-based soft-magnetic amorphous steel. The iron-based soft-magnetic amorphous steel is composed of FeaCbSicMndPeSfCrgAlhNiiBj and inevitable impurities, wherein by atomic percentage, a accounts for 74-80, b accounts for 0.02-0.06, c accounts for 9.10-11, d accounts for 0-0.25, e accounts for 0.1-0.2, f accounts for 0-0.05, g accounts for 0-1.6, h accounts for 0.03-0.07, i accounts for 0-1, j accounts for 11.10-13, and a+b+c+d+e+f+g+h+i+j=100. The alloy material has the high saturation flux density (i)B( / i)s (the maximum value of 1.7T), the high effective magnetic conductivity (i)mu( / i)e (the maximum value of 14401 at 1kHz), the high-frequency stability and the low coercive force (i)H( / i)c (the minimum value of 1.405A / m), the formability is good, the preparation technological conditions are loose, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of amorphous alloys, and specifically relates to a low-cost multi-element low-alloy steel as a basic alloy and its application, and its properties are developed by adding metalloid elements, removing part of alloy elements or adding industrial pure iron. (high mu e ,Low H c ,High B s ) excellent new iron-based soft magnetic amorphous steel, the iron-based soft magnetic amorphous steel belongs to the category of iron-based amorphous alloys. Background technique [0002] In my country, amorphous materials belong to the national key new products of the "12th Five-Year Plan" and "13th Five-Year Plan" of the new material industry, and have the remarkable characteristics of green energy saving. Compared with traditional steel, amorphous steel has attracted more attention from researchers and business personnel because of its excellent physical and chemical properties. In 2003, S.Joseph Poon of the United St...

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Problems solved by technology

[0004] In 2004, Lv Zhaoping also proposed the concept of structural amorphous steel, using the traditional suction casting method to prepare a bulk non-magnetic amorphous steel alloy FeCrCoMoMnCBY series, which is a cylindrical rod with a diameter of 12 mm and has excellent mechanical properties. , but the alloy system is also non-magnetic, which limits its industrial application (Lu Z P, et al. Phys Rev Lett, 2004, 92(24): 245503-1~245503-4)

In 2009, S.L.Wang et al added 1% Co to the 6 mm composition, and successfully prepared a 7 mm rod FeCSiBPCrAlMoCo by replacing part of Fe with Cr (Wang S L, et al. Mater Chem Phys., 2009, 113:878~883), which is a breakthrough in industry, but it has not been applied to actual production due to its low mechanical and magnetic properties.

[0008] Chinese patent document CN106282849A discloses an amorphous composite structural steel, which strengthens and toughens the metallic glass matrix through stress-induced transformation from γ austenite to ε martensite, reduces its yield ratio, and obtains good plasticity Deformability and high strength, but it has no magnetic characteristics

[0009] Although the above-mentioned alloy systems have high amorphous forming ability, due to the existence of more diamagnetic ions (such as Cr, etc.) in such alloy systems, most of them are non-magnetic or have only weak magnetic properties. B s Around 1.0T, and mu e low value and H c The value is large, which cannot meet the high magnetic properties required by the increasing demand of magnetic materials in contemporary society

In addition, these alloys also contain a large amount of precious metal elements such as Mo and Co, which increases the cost of production.

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