High-corrosion-resistance super-free-cutting soft magnetic ferrite stainless steel wire rod and preparation method thereof

Abstract

The invention relates to the technical field of metal smelting, in particular to a high-corrosion-resistance super-free-cutting soft magnetic ferrite stainless steel wire rod. The wire rod is characterized by being prepared from the components including, by mass, 0.05%-0.15% of S, 1.0%-2.0% of Si, 0.1%-0.4% of Cu, 17.0%-19.0% of Cr, 1.0%-2.0% of Mo, 0.2%-0.4% of Nb, 0.005%-0.015% of Te, less than or equal to 0.03% of C, less than or equal to 0.03% of N, less than or equal to 0.03% of P, less than or equal to 0.8% of Mn, less than or equal to 0.4% of Ni and the balance Fe and other impurities. The invention further relates to a preparation method of the stainless steel wire rod. The preparation method comprises the steps that raw materials are sequentially subjected to electric arc furnace smelting, AOD furnace smelting, LF ladle refining, continuous casting, continuous casting billet heating, rolling, solid solution and acid pickling, and finally, the stainless steel wire rod finished product is obtained. Through component optimization, tellurium alloying and production process technology control, the high-corrosion-resistance super-free-cutting soft magnetic stainless steel wire rod is manufactured, and the soft magnetic stainless steel wire rod also has excellent machining performance and soft magnetic performance at the same time. The total yield of the produced soft magnetic stainless steel wire rod is larger than or equal to 95%, and the production cost is low.

Description

【Technical field】 [0001] The invention relates to the technical field of metal smelting, in particular to a highly corrosion-resistant and super easy-to-cut soft magnetic ferrite stainless steel wire rod and a preparation method thereof. 【Background technique】 [0002] Soft magnetic material is a kind of magnetic material, which has high permeability, high saturation magnetic induction and low coercive force. It is easy to magnetize under the action of magnetic field, and it is easy to demagnetize after canceling the magnetic field. Used in the manufacture of magnetic conductors, iron cores for transformers and relays, solenoid valves for household appliances, solenoid valves for automotive control systems, etc. [0003] Common soft magnetic materials include pure iron, silicon steel, iron-nickel alloy, ferritic stainless steel, etc. Pure iron and silicon steel have poor corrosion resistance. After being made into components, electroplating is required to increase corrosion...

AI Technical Summary

Problems solved by technology

[0008] Combined with Table 3, the patents disclosed by numbers 1 to 4 all added a large amount of sulfur (S>0.15) to the soft magnetic ferrite stainless steel to improve the machinability of the material, and achieved a certain effect, indicating that the addition of sulfur is to improve the machinability of the material. However, excessive sulfur will form coarse manganese sulfide with manganese and accumulate to exist, thus the corrosion source of the component materials will seriously affect the corrosion resistance. The inventions disclosed in numbers 1 to 4 have not explained how to eliminate the excessive sulfur The effect of sulfur

Patents No. 5 and No. 6 all added a small amount of sulfur (S<0.05) to the soft magnetic ferrite stainless steel, but after research, only adding a very small amount of easy-cutting element S cannot achieve a good easy-cutting effect

[0009] In Table 3, in order to improve the corrosion resistance of the inventions disclosed in numbers 1 to 6, Mo is added to the material, which shows that Mo can improve the corrosion resistance of the material to a certain extent, and some (numbers 2, 3, 6) are also added to it. Ti, Re, and V are used to improve the corrosion resistance of materials, but it also increases the difficulty of production, and is expensive, increasing production costs

[0010] To sum up, the soft magnetic stainless steel used in high-end products not only requires good corrosion resistance, but also good cutting performance, and also requires good machinability and soft magnetic properties. Traditional soft magnetic stainless steel materials have been Unable to meet these needs, high-end soft magnetic materials have been monopolized by foreign countries for a long time, and there is an urgent need to develop high-quality soft magnetic stainless steel in China

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