A method for improving corrosion resistance of iron-based nanocrystalline alloy strip
A technology of iron-based nanocrystalline and alloy strips, which is applied in the field of soft magnetic materials, can solve problems affecting the soft magnetic properties of nanocrystalline alloy strips, increase the thickness of nanocrystalline alloy strips, etc., achieve surface passivation and reduce heat treatment time , Improve the effect of soft magnetic properties
Active Publication Date: 2021-06-22
安徽智磁新材料科技有限公司
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Problems solved by technology
Conventional corrosion-resistant methods such as coating corrosion-resistant coatings will not only affect the soft magnetic properties of the nanocrystalline alloy strip itself, but the presence of the coating will increase the thickness of the nanocrystalline alloy strip. Will be much thicker than uncoated
Method used
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Embodiment 1～4
[0023] (1) Add the alloy raw material into the melting furnace according to the mass percentage shown in Table 1, heat it at 1540°C for 20 minutes after melting, and add a purifying agent, wherein the purifying agent consists of 53% silicon dioxide, 37% calcium oxide, 12% Composed of iron scale, the slag is left for many times, and finally the components in the alloy mother liquor are evenly distributed, and the respective contents of Al, O, and N are below 10ppm;
[0024] (2) Import the alloy mother liquor in the smelting furnace into the tundish, seal the nozzle with a stopper rod, and let it stand for 30 minutes to make the temperature of the mother liquor even;
[0025] (3) Then lift the plug rod, the mother liquor enters the nozzle bag, and is shot onto the cooling roller rotating at high speed through the nozzle, so that the alloy mother liquor 6 ~10 7 The speed of ℃ / sec is cooled and formed to obtain a soft magnetic alloy strip. Among them, the spray casting pressure i...
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Abstract
The invention discloses a method for improving the corrosion resistance of iron-based nanocrystalline alloy strips, belonging to the technical field of soft magnetic materials. In the method of the present invention, firstly, the high-temperature master alloy melt is sprayed onto a high-speed rotating cooling copper roller by using rapid quenching and rapid cooling technology, and then the obtained soft magnetic alloy strip is wound on a guide roller and one end of the strip is pulled to make the strip pass through in turn. The salt bath and the heating device are used for salt bath heating treatment and constant temperature heating treatment respectively, and then the nanocrystalline alloy strip is obtained by natural cooling and winding. The formula of the master alloy raw material adopted in the method of the present invention is: B: 5~11%; Si: 5.8~9.2%; Cu: 0.6~1.4%; Nb: 1.2~2.8%; Cr: 1.2~2.0%; Mo : 0.5~1.2%; Mn: 0.8~2.0%; the balance is Fe, wherein the sum of the mass percentages of B and Si is 14.2~16.8%; the mass ratio of Cr and Mo is 2:1. The method of the invention can greatly improve the corrosion resistance of the nanocrystalline alloy strip on the basis of maintaining the excellent soft magnetic properties of the nanocrystalline alloy strip by optimizing the alloy element composition, proportion and heat treatment method.
Description
technical field [0001] The invention relates to a method for improving the corrosion resistance of iron-based nanocrystalline alloy strips, belonging to the technical field of soft magnetic materials. Background technique [0002] Nanocrystalline soft magnetic material is a new type of soft magnetic material developed on an amorphous soft magnetic substrate, which consists of an amorphous substrate and ferromagnetic nanocrystalline grains. The iron-based nanocrystalline alloy is firstly sprayed with high-temperature master alloy melt onto a high-speed rotating cooling copper roller by using rapid quenching and rapid cooling technology, and is rapidly cooled and solidified at a speed of one million degrees per second to form an amorphous structure with a long-range disordered structure. Alloy strips, and then through crystallization heat treatment to precipitate nanoscale magnetic α-iron phase to obtain a new type of soft magnetic alloy material with nanocrystalline structure...
Claims
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IPC IPC(8): C22C33/04C22C38/04C22C38/20C22C38/22C22C38/26C22C38/32C22C38/34C22C38/38C21D9/52C21D1/46B22D11/06H01F1/147
CPCB22D11/06B22D11/0642C21D1/46C21D9/52C21D2201/03C22C33/04C22C38/04C22C38/20C22C38/22C22C38/26C22C38/32C22C38/34C22C38/38C22C2200/04H01F1/14775
Inventor 邓毕力王波张朋罗顶飞潘振海晋立从徐敏义王玉川
Owner 安徽智磁新材料科技有限公司
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