Method for producing high-magnetic-conductive amorphous nanocrystalline alloy strips at low cost

Abstract

The invention relates to a method for producing high-magnetic-conductive amorphous nanocrystalline alloy strips at a low cost, and belongs to the field of amorphous nanocrystalline industries. The method comprises the following steps that A, silicon steel sheet leftover materials are added into a non-vacuum induction furnace to be melted in batches, ordinary glass fragments are added, when metallic oxide is dissolved in molten glass, slag materials are formed, deslagging is conducted, and glass fragments are added to remove impurities; B, copper, silicon, boron, niobium and tungsten are added, ordinary glass fragments are added after melting is conducted, deslagging is conducted, and glass fragments are added to remove impurities; C, heating is conducted continuously till the temperature reaches to 1390-1420 DEG C, furnace dumping and zone spraying are conducted, and amorphous nanocrystalline alloy strips are obtained; and D, isothermal heating is conducted step by step, then the strips are rapidly cooled down to room temperature, and the high-magnetic-conductive amorphous nanocrystalline alloy strips are obtained. According to the method for producing the high-magnetic-conductive amorphous nanocrystalline alloy strips at the low cost, the input cost is low, producing and machining are simple, energy conservation and environmental protection are achieved, and the relative magnetic permeability of the prepared high-magnetic-conductive amorphous nanocrystalline alloy strips reaches to over 44 ten thousands; and the magnetic conductive property is more stable, and even the content (Si and B) fluctuates, wide fluctuation cannot occurs.

Description

technical field [0001] The invention relates to the field of amorphous and nanocrystalline industry, in particular to a production method of an amorphous and nanocrystalline ribbon. Background technique [0002] In 1988, Yoshizawa Katsuhito of Hitachi Metals Co., Ltd. of Japan discovered that adding a certain amount of Nb and Cu to the matrix of Fe, Si, and B amorphous alloys made of amorphous strips, and crystallizing and annealing at an appropriate temperature can obtain a high A soft magnetic alloy with ultra-fine grains (nanoscale) with excellent magnetic permeability and excellent performance. Its typical composition is: Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 (at%), the alloy is called 1K107 in China. [0003] The industrial production method of 1K107 alloy is to put raw materials such as pure iron, ferroniobium, ferroboron, industrial silicon and electrolytic copper into the vacuum induction furnace according to the ratio and melt them, then cast the master alloy, and th...

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Problems solved by technology

As mentioned above, since the spraying of amorphous strips must be carried out in the atmosphere, and the 1K107 alloy must stay in a liquid state at 1200-1400 °C for a period of time to make the composition uniform, so the oxidation of Si and B is inevitable, which leads to The fluctuation of Si and B in the alloy, and the main reason for the fluctuation of the magnetic properties of the alloy