High-performance soft magnetic stainless steel and preparation method thereof

Abstract

The invention belongs to the field of stainless steel, and particularly relates to high-performance soft magnetic stainless steel and a manufacturing method thereof. The soft magnetic stainless steel comprises the following components in percentage by weight: less than or equal to 0.02% of C, 1.5-2.5% of Si, less than or equal to 0.8% of Mn, less than or equal to 0.03% of P, more than or equal to 0.15-0.35% of S, less than or equal to 0.4% of Ni, 13.0-15.0% of Cr, less than or equal to 0.02% of N, 0.2-0.8% of Mo, 0.15-0.30% of Nb, 0.005-0.012% of Re and the balance of iron and inevitable impurities. The preparation method comprises the steps that waste stainless steel is sequentially subjected to electric furnace smelting, AOD refining, LF refining, continuous casting, rolling and annealing, and the stainless steel is obtained. The stainless steel manufactured through the method is excellent in soft magnetic performance, high in saturation flux density and low in coercive force and residual magnetic flux density; meanwhile, stainless steel is good in corrosion resistance, and can work under various severe conditions; the stainless steel manufactured by the invention also has good machinability and good plasticity, and is beneficial to drawing and turning of downstream customers. In addition, the yield of the product prepared through the preparation method reaches 96% or above.

Description

technical field [0001] The invention belongs to the field of stainless steel, in particular to a high-performance soft magnetic stainless steel and a manufacturing method thereof. Background technique [0002] Soft magnetic material is a kind of magnetic material with high permeability, high saturation magnetic induction and low coercivity. It is used in the manufacture of magnetic conductors, transformers, iron cores for relays, solenoid valves for household appliances, solenoid valves for automotive control systems, etc. [0003] Common metal soft magnetic materials are mostly pure iron and silicon steel, but their corrosion resistance is poor. After being made into components, electroplating is required to increase the corrosion resistance, which increases the cost and pollutes the environment. Therefore, the research on soft magnetic stainless steel Very necessary. With the rapid development of the manufacturing industry, the application of soft magnetic stainless stee...

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Problems solved by technology

At present, the domestic use of such high-performance soft magnetic stainless steel mainly relies on imports from Italy, Japan and other countries. Imported products are expensive and not conducive to localization. Therefore, the development of high-performance soft magnetic stainless steel materials is also very important.

[0004] Aiming at the composition design and manufacturing method of soft magnetic stainless steel, the publication number is CN106636894A, and the invention patent titled "Low-carbon ferritic soft magnetic easy-cutting stainless steel and its production method" is characterized in that the composition of alloy elements in weight percentage: C ≤0.04%, Si1.0~1.5%, Mn≤1.0%, P≤0.045%, S≥0.15%, Cr 15.0~20.0%, Ni≤0.60%, Mo0.2~0.6%, balance iron and unavoidable impurities, the invention obtains stainless steel with high saturation magnetic induction intensity through sufficient design and process optimization, but its plasticity is not good, which is not conducive to processing and production; "Manufacturing method" invention patent, which is characterized by the composition of alloy elements in weight percent: C≤0.08%, Si0.8-2.5%, Mn0.2-0.8%, S0.2-0.4%, Cr 16.0-20.0%, Ni ≤0.2%, Mo0.5~1.5%, Ti:0.2~0.6%, Re≤0.1%, the balance of iron and unavoidable impurities, the invention improves corrosion resistance by adding Mo, Ti, Re, Cr, S (3) Publication No. CN111471918A, titled "Soft Magnetic Stainless Steel and Manufacturing Method for Manufacturing Soft Magnetic Stainless Steel Wire", It is characterized by the composition of alloy elements in weight percentage: C≤0.015%, Si1.9~2.1%, Mn0.2~0.3%, P≤0.025%, S0.015~0.03%, Cr 14.5~15.5%, Ni≤0.2 %, Mo0.40~0.45%, N≤0.02%, the balance of iron and unavoidable impurities, the invention can obtain stainless steel with better soft magnetic properties through composition design, but the cutting performance is limited; (4) Publication number is CN107012401A , an invention patent titled "a low-carbon ferritic soft magnetic stainless steel and its production method", which is characterized in that the composition of alloy elements in weight percentage: C≤0.03%, Si2.5-3.5%, Mn≤0.5%, P≤0.03%, S≤0.03%, Cr 13.5~15.0%, Ni≤0.6%, Mo0.2~0.7%, N≤0.02, v≤0.15%, Ti≤0.1%, balance iron and unavoidable impurities , the stainless steel obtained by the invention has excellent soft magnetic properties and corrosion resistance, but poor cutting performance

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