CN106636909A - Corrosion-resistant soft magnetic ferrite stainless steel - Google Patents
Corrosion-resistant soft magnetic ferrite stainless steel Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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Abstract
The invention discloses corrosion-resistant soft magnetic ferrite stainless steel for ferromagnetic parts. The corrosion-resistant soft magnetic ferrite stainless steel comprises the following chemical components by mass fraction: less than or equal to 0.015% of C + N, 0.01-0.05% of S, 16-22% of Cr, less than or equal to 0.5% of Ti, 1.0-2.5% of Mo, 0.5-1.5% of Si, 0.5-1.5% of Al, 0.5-1.0% of Cu, less than or equal to 1.0% of Re, and the balance Fe and inevitable impurities. The content of chromium, silicon and aluminum in the alloy is adjusted, a proper amount of copper and rare earth elements are added, a reasonable preparation technology is adopted, and therefore the corrosion-resistant soft magnetic ferrite stainless steel for the ferromagnetic parts is designed. According to the soft magnetic performance indexes, the coercive force is less than or equal to 105 A/m, and the residual magnetism is less than or equal to 48 A/m, and the saturation magnetization intensity reaches 23600 A/m approximately.
Description
Technical field
The present invention relates to ferritic stainless steel, specifically, the present invention relates to a kind of for the corrosion-resistant of ferromagnetic component
Soft magnetism ferritic stainless steel.
Background technology
Soft magnetic materials is to refer to respond rapidly to external magnetic field change, and can obtain to low-loss the material of high magnetic flux density
Material.It was both easily magnetized by externally-applied magnetic field, and easily demagnetization.Soft magnetic materials is due to relatively low, both easy by outer with coercivity
Plus magnetic field magnetization again easily demagnetization the characteristics of, be widely used in electrical engineering, radio, communication, computer, household electrical appliance and high-new
The fields such as technology.The soft magnetic materials applied now mainly has：Electrical pure iron, silicon steel, permalloy, ferrochrome magnetic rustless steel,
Soft magnetic ferrites and nano crystal soft magnetic material etc..Wherein, main representative has ferritic stainless steel in ferrochrome magnetic rustless steel,
General ferritic stainless steel can again add the elements such as molybdenum, titanium, niobium, silicon, aluminum, tungsten, vanadium, its chemical composition on the basis of ferrum, chromium
In mainly ferrite former, use state lower substrate is organized as ferrite.Ferritic stainless steel has enough soft magnetisms
Performance, excellent corrosion resisting property and mechanical property and simple production process and low cost and other advantages, therefore it is used as soft magnetism material
The application of material is quite varied.
Soft magnetism ferritic stainless steel is very crucial for the use of many electromechanical devicies, it is necessary to provide optimal for these devices
Magnetic, so as to ensure correct output signal and response time.The example of this kind of device includes fuel injector, fuel oil in automobile
The electric magnet of pump and anti-lock braking system；Other important purposes also have industrial electric magnet and control corrosion rate fluid flow
Pump；Various types of iron cores, armature and relay, adjust the valve of eroding chemical flow.Soft magnetism ferritic stainless steel exists
There is very vast potential for future development in China, and China is a household electrical appliances big producing country, and ferritic steel is the use rich and influential family of household electrical appliances industry,
Cylinder such as washing machine can only use ferritic steel；In addition, with domestic automobile industrial expansion, automobile exhaust system is also to make
With the key areas of ferritic steel.
Although ferritic stainless steel is very universal as the use of soft magnetic materials, its magnetic property is relatively using more
There is weak point for the soft magnetic materials such as universal electrical pure iron and ferrite, the resistivity of such as soft magnetic ferrites is golden
Category soft magnetic materials is much larger, and eddy-current loss is little；Permalloy（Iron-nickel alloy）With less coercivity and remanent magnetism.Therefore, need
The soft magnet performance of ferritic stainless steel is further improved, including improved saturation induction density, reduced coercivity and remanent magnetism etc..
, to ensure that its corrosion resistance must be electroplated after element is processed into, this both increased for conventional soft magnetic materials such as pure iron and silicon steel
Production cost has been added to pollute environment again；And when using under some special environments, both required that soft magnetic materials had good magnetic
Performance and electrical property, require excellent corrosion resistance again.Therefore, research and develop corrosion resistant soft magnetism ferritic stainless steel very must
Will.
A series of ferritic stainless steels with premium properties, such as Application No. are had been developed in recent years
A kind of 201310698409.0 antioxidation ferritic stainless steel containing aluminum and rare earth, the ferritic stainless steel has excellent power
, antioxidation, anti-corrosion and processing characteristics, but because it does not contain the alloying elements such as molybdenum, titanium, copper, the stainless corrosion resistance
Need further raising.The soft-magnetic stainless steel of Application No. 200710020713.4 has preferable Dynamic magnetic property, corrosion-resistant
Performance and good machining property, but it is in magnetizing field H=50KA/m, coercivity H（342A/m）It is bigger than normal, it is impossible to full
Its requirement as ferromagnetic component enough.If the coercivity of material is larger, A.C.power loss is also larger, after magnetic part life-time service
Fever phenomenon is easily produced, and certain remanent magnetism can be produced, after cutting off the electricity supply, due to the presence of remanent magnetism, starting current is just
Need much greatly, this is very unfavorable to being applied to the fields such as Aeronautics and Astronautics.
Ferritic stainless steel soft magnet performance and the principal element of corrosion resisting property is affected to have alloying component and microscopic structure, wherein
The impact of alloying element is the most notable.The present invention by the content of chromium, silicon and aluminum in adjustment alloy and add appropriate copper and
Rare earth element, using rational preparation technology, designs a kind of corrosion-resistant soft magnetism ferritic stainless steel for ferromagnetic component.
The purpose of the present invention is further to improve the soft magnet performance and corrosion resisting property of ferritic stainless steel, so as to expand ferritic stainless steel
As the range of application of soft magnetic materials.
The content of the invention
The present invention provides a kind of corrosion-resistant ferritic stainless steel for ferromagnetic component, the chemistry of the ferritic stainless steel
Composition（Mass fraction）Comprising：C+N≤0.015%、S:0.01~0.05%、Cr:16~22%、Ti≤0.5%、Mo:1.0~2.5%、
Si:0.5~1.5%、Al:0.5~1.5%、Cu:0.5 ~ 1.0%, Re≤1.0%, balance of Fe.
In a preferred embodiment：The chemical composition of the ferritic stainless steel（Mass fraction）Comprising：C+N≤
0.015%、S:0.01~0.05%、Cr:18~20%、Ti≤0.5%、Mo:1.0~2.5%、Si:0.5~1.5%、Al:0.5~1.5%、
Cu:0.5 ~ 1.0%, Re≤1.0%, balance of Fe and inevitable impurity.
In a further preferred embodiment：In the ferritic stainless steel mass percentage content of Si be 0.8 ~
1.0%。
In a further preferred embodiment：In the ferritic stainless steel mass percentage content of Al be 0.8 ~
1.2%。
Above-mentioned rustless steel is with high chrome, pure iron, pure titanium, fine aluminium, pure molybdenum, ferrosilicon, sulfur ferrum, fine copper and the pure cerium of rare earth as original
Material, steel billet is casting continuously to form using the method for induction melting, steel billet after 950 ~ 1150 DEG C of hammer coggings, then at 950 ~ 1150 DEG C of hot rollings
Forming material, the section bar after hot rolling quenches rapid cooling after need to carrying out 1000 ~ 1100 DEG C of solution treatment 1 ~ 5 hour, need to subsequently carry out 600 ~
750 DEG C of temper 1 ~ 5 hour, then furnace cooling or air cooling.
Below the stainless chemical composition of the corrosion-resistant soft magnetism ferrite for ferromagnetic component of the present invention is made to be used as
Narration in detail.
Chromium：Chrome ferritic formation element, with ferrum continuous solid solution can be formed, and reduce austenite phase field.When chromium content in steel
When reaching 10.5%, the surface of steel forms passivating film, the atmospheric corrosion resistance of steel is significantly improved, if there is the carbide of chromium in steel
During precipitation, the decay resistance of steel declines.When chrome content was not less than for 12.5% atomic time, the electrode potential that can make steel is undergone mutation,
Positive electrode potential is raised to by nagative potential, thus is remarkably improved the corrosion resistance of steel.Chromium is alloying element main in rustless steel
One of, the decay resistance of steel can not only be improved in terms of chemical property, can also improve the antioxygenic property of steel.Chromium can be carried significantly
High stainless intensity, hardness, wearability and resistance, but dendritic segregation is easily formed, reduce the plasticity of steel.Chromium content is higher,
The ability of stainless resistance to spot corrosion and crevice corrosion is stronger, but when chromium content is high, if there is σ phases to separate out, its impact flexibility
Drastically decline.Therefore chromium content general control is optimal with 18 ~ 20% scopes 16 ~ 22% in the present invention.
Titanium：When rustless steel is heated to 450 ~ 800 DEG C, usually make near crystal boundary due to separating out the carbide of chromium in crystal boundary
Chrome content declines to form Cr depletion zone, causes the electrode potential near crystal boundary to decline, so as to cause electrochemical corrosion, this corrosion
Do intercrystalline corrosion.And titanium is carbide, it is more much bigger than chromium with the affinity of carbon, and titanium is added in steel, just can make
Carbon in steel forms first carbide with titanium, and carbide is not formed with chromium, so as to ensure near crystal boundary that reason is chromium depleted and produce
Raw intercrystalline corrosion.Therefore, titanium is commonly used to the carbon fixed in steel, improves the ability of rustless steel anti intercrystalline corrosion, and improves the weldering of steel
Connect performance.Therefore Ti content is controlled≤0.5% in rustless steel of the present invention.
Silicon：The affinity of silicon and oxygen is only second to aluminum and titanium, is better than manganese, chromium, vanadium.So in steelmaking process, being commonly used as
Reducing agent and deoxidizer.As the alloying element in rustless steel, it is present in ferrite with solid solution volume morphing, reduces austenite phase
Area, is ferrite former.Silicon can promote ferrite crystal grain to be roughened, and reduce its coercivity, reduce the anisotropic of crystal,
Make rustless steel magnetization easy, magnetic resistance reduction, so siliceous stainless magnetic hystersis loss is relatively low.Silicon can significantly improve the elastic pole of steel
Limit, yield point and tensile strength, and improve fatigue strength and endurance ratio.Silicon can improve solid solution intensity and cold working in rustless steel
Strain hardening rate.Stainless proportion, heat conductivity, electrical conductivity are reduced with the increase of silicone content.Silicon content increases,
Welding performance, plasticity and the impact flexibility of steel can be reduced.Therefore the optimum range of silicone content is controlled 0.8 ~ 1.0%.
Aluminum：Aluminum is the strong deoxidizer commonly used in steel, the strong austenite phase field for reducing steel.A small amount of aluminum is added in steel, can
Significantly crystal grain thinning, improves impact flexibility, reduces cold brittleness.Aluminum is stainless as being remarkably improved in alloying element addition steel
Non-oxidizability and corrosion resistance, aluminum is shared with chromium, silicon, is remarkably improved stainless high temperature non-scale performance and high temperature resistant is rotten
The ability of erosion.When aluminium content reaches certain value, the surface for making steel produces passivation phenomenon, steel is had in oxidizing acid against corrosion
Property, and improve the etch resistant properties to hydrogen sulfide.The price of aluminum is relatively cheap, so often being replaced with aluminum in heat-resisting alloy steel
Chromium.The shortcoming of aluminum is hot-working character, welding performance and the machinability for affecting steel, and aluminum is to steel in chlorine and chloride gas
Corrosion stability in atmosphere is unfavorable.Therefore the optimum range of silicone content is controlled 0.8 ~ 1.2%.
Copper：Copper can increase surface passivity of the rustless steel in reproducibility environment, improve rustless steel and sulphuric acid, acetic acid etc. are corroded
The anti-corrosion capability of medium.It is because the corrosion surface that cement copper is attached to steel is inhibited that copper can improve the anti-general corrosion ability of rustless steel
Anodic solution, so as to reach erosion-resisting effect.Meanwhile, addition copper can make rustless steel have antibiotic property, it is also possible to carry
The plasticity of Gao Gang and cold-formed property.But copper has diamagnetism, soft magnet performance can be had a negative impact, so copper
Content span of control is 0.5 ~ 1.0%.
Rare earth：The effect of rare earth in steel be mainly manifested in three aspects to the purification of molten steel, it is rotten be mingled with it is micro-
Alloying.The purification of RE Elements on Steel liquid refer to rare earth in molten steel with the harmful element reacting generating compound such as O, S, and make
Discharge from molten steel for field trash, cause impurity in steel thus be mingled with content reduction.The metamorphism of steel middle rare earth, refers to change
Or existence or species, composition and structure, shape, size, distribution of impurity, field trash or harmful phase etc. are affected, so that subtracting
It is light or eliminate its illeffects, even become and be harmful to as favourable, ultimately result in the improvement of Steel Properties.Suitable rare earth is in sample
Non-metallic inclusion has significantly refinement, spheroidizing, and excessive rare earth makees field trash agglomeration, refinement, nodularization
With decrease, the performance of steel is had a negative impact.Therefore the content of rare earth element needs control≤1.0%.
In order to further carry heavy alloyed decay resistance, a small amount of molybdenum element is added, but molybdenum element is nonmagnetic
Alloying element and the reduction of magnetic property can be caused, therefore the addition of molybdenum is preferably 1.0 ~ 2.5%.
Compared with prior art, beneficial effects of the present invention are：
1）The present invention passes through the appropriate copper of the content of chromium, silicon and aluminum and addition and rare earth element in adjustment alloy, using reasonable
Preparation technology, design a kind of corrosion-resistant soft magnetism ferritic stainless steel for ferromagnetic component.Soft magnet performance index coercive
Power≤105A/m, remanent magnetism≤48A/m, saturation magnetization reaches 23600A/m or so.
2）Because the alloy of the present invention contains the elements such as a certain amount of chromium, copper, corrosion resisting property is improved, in electrochemistry experiment
Middle corrosion current reaches smaller value, i.e. alloy and has preferable corrosion resistance.
Specific embodiment
It is for a more detailed description to the present invention by the following examples.These embodiments are only to optimal enforcement of the invention
The description of scheme, does not there is any restriction to the scope of the present invention.
Embodiment 1
Chemical composition as shown in table 1 is smelted, and alloying adds the raw materials such as pure titanium, ferrosilicon, sulfur ferrum, is guarantor in fusion process
Card composition is uniformly stirred using high power.Steel ingot after smelting is rolled into according to a conventional method suitable size and shape, then carries out
1000 ~ 1100 DEG C of solution treatment quench water-cooled after 1 ~ 5 hour, need to subsequently carry out 600 ~ 750 DEG C of temper after 1 ~ 5 hour with stove
Cooling or air cooling.The purpose of solid solution tempering is to eliminate the segregation that foundry goods is produced in process of setting, makes microstructure homogenization.
Embodiment 2 ~ 6
Chemical composition as shown in table 1 is smelted, and embodiment is with embodiment 1.
Comparative example 1 ~ 5
Chemical composition as shown in table 1 is smelted, and embodiment is with embodiment 1.
The stainless chemical composition of soft magnetism ferrite of the embodiment of the present invention 1 ~ 6 of table 1 and comparative example 1 ~ 5（wt%）
| Cr | Ti | Mo | Al | Si | C+N | S | Cu | Re | Fe | |
| Embodiment 1 | 19.5 | 0.42 | 2.1 | 0.97 | 0.89 | 0.011 | 0.04 | 0.74 | 0.06 | Surplus |
| Embodiment 2 | 18.8 | 0.33 | 1.4 | 1.02 | 0.78 | 0.008 | 0.05 | 0.65 | 0.12 | Surplus |
| Embodiment 3 | 18.4 | 0.35 | 1.6 | 1.20 | 0.96 | 0.009 | 0.02 | 0.57 | 0.07 | Surplus |
| Embodiment 4 | 19.1 | 0.27 | 2.0 | 1.17 | 0.87 | 0.014 | 0.02 | 0.71 | 0.27 | Surplus |
| Embodiment 5 | 18.7 | 0.38 | 1.5 | 0.98 | 0.75 | 0.011 | 0.03 | 0.63 | 0.10 | Surplus |
| Embodiment 6 | 18.5 | 0.45 | 1.8 | 1.24 | 0.83 | 0.009 | 0.02 | 0.72 | 0.05 | Surplus |
| Comparative example 1 | 16.3 | 0.40 | 2.2 | 0.96 | 1.02 | 0.015 | 0.01 | 0.72 | 0.09 | Surplus |
| Comparative example 2 | 18.6 | 0.37 | 1.5 | 1.05 | 0.23 | 0.004 | 0.04 | 0.64 | 0.16 | Surplus |
| Comparative example 3 | 18.5 | 0.41 | 1.9 | 0.62 | 0.78 | 0.007 | 0.03 | 0.70 | 0.08 | Surplus |
| Comparative example 4 | 17.6 | 0.25 | 1.6 | 1.09 | 0.66 | 0.005 | 0.03 | 0.22 | Surplus | |
| Comparative example 5 | 19.7 | 0.38 | 1.4 | 0.86 | 0.74 | 0.008 | 0.02 | 0.87 | Surplus |
Test example 1
Magnetism testing is carried out to the ferritic stainless steel of the embodiment of the present invention 1 ~ 6 and comparative example 1 ~ 5, test result is shown in Table 2.
The magnetic property of the ferritic stainless steel of the embodiment of the present invention 1 ~ 6 of table 2 and comparative example 1 ~ 5
| Coercivity（A/m） | Remanent magnetism（A/m） | The intensity of magnetization（103A/m） | |
| Embodiment 1 | 89 | 45 | 24.12 |
| Embodiment 2 | 94 | 48 | 23.78 |
| Embodiment 3 | 86 | 37 | 24.57 |
| Embodiment 4 | 105 | 42 | 23.64 |
| Embodiment 5 | 90 | 45 | 22.43 |
| Embodiment 6 | 87 | 41 | 21.84 |
| Comparative example 1 | 147 | 58 | 23.19 |
| Comparative example 2 | 96 | 64 | 23.54 |
| Comparative example 3 | 142 | 59 | 22.49 |
| Comparative example 4 | 97 | 54 | 20.55 |
| Comparative example 5 | 138 | 63 | 18.73 |
As can be seen from Table 2, the ferritic stainless steel for ferromagnetic component of the invention has good soft magnet performance, meets
Coercivity≤105A/m, remanent magnetism≤48A/m, saturation magnetization reaches 23600 A/m or so.Wherein larger is affected on magnetic property
Alloying element be rare earth element, by not plus rare earth element comparative example 5 as can be seen that its magnetic property it is poor.Rare earth element
Addition can improve microscopic structure, so as to reduce magnetic history in magnetic resistance effect, improve soft magnet performance.
Test example 2
Corrosion resistance test is carried out to the ferritic stainless steel of the embodiment of the present invention 1 ~ 6 and comparative example 1 ~ 5, test result is shown in Table 3.
The corrosion resistance of the ferritic stainless steel of the inventive embodiments 1 ~ 6 of table 3 and comparative example 1 ~ 5
| Corrosion potential（V） | Corrosion electric current density（10-5A/cm2） | |
| Embodiment 1 | -0.417 | 4.31 |
| Embodiment 2 | -0.404 | 1.07 |
| Embodiment 3 | -0.412 | 3.51 |
| Embodiment 4 | -0.423 | 6.45 |
| Embodiment 5 | -0.407 | 4.82 |
| Embodiment 6 | -0.418 | 5.67 |
| Comparative example 1 | -0.430 | 10.38 |
| Comparative example 2 | -0.437 | 11.54 |
| Comparative example 3 | -0.429 | 8.59 |
| Comparative example 4 | -0.441 | 12.77 |
| Comparative example 5 | -0.434 | 10.29 |
By table 3 to find out, the ferritic stainless steel for ferromagnetic component of the present invention has good corrosion resisting property.By comparing
Example 2 and 4 can be seen that silicon and copper affects larger to corrosion resisting property, so needing rationally to control its content.Copper why can
Ability of the ferritic stainless steel in terms of anti-general corrosion is enough improved, mainly due to the copper of precipitation the corrosion table of steel is attached to
Face, so as to inhibit the generation of anodic solution, promotes rustless steel to reach erosion-resisting effect.The addition of appropriate silicon can improve base steel
The electrode potential of body, so as to improve the ability of electrochemically resistant corrosion.
Claims (5)
1. a kind of corrosion-resistant ferritic stainless steel for ferromagnetic component, it is characterised in that in terms of mass fraction, the ferrite
Stainless chemical composition is included：C+N≤0.015%、S:0.01~0.05%、Cr:16~22%、Ti≤0.5%、Mo:1.0~2.5%、
Si:0.5~1.5%、Al:0.5~1.5%、Cu:0.5 ~ 1.0%, Re≤1.0%, balance of Fe and inevitable impurity.
2. rustless steel as claimed in claim 1, it is characterised in that in terms of mass fraction, the chemistry of the ferritic stainless steel into
Subpackage contains：C+N≤0.015%、S:0.01~0.05%、Cr:18~20%、Ti≤0.5%、Mo:1.0~2.5%、Si:0.5~1.5%、
Al:0.5~1.5%、Cu:0.5 ~ 1.0%, Re≤1.0%, balance of Fe and inevitable impurity.
3. rustless steel as claimed in claim 1 or 2, it is characterised in that the mass percent of Si in the ferritic stainless steel
Content is 0.8 ~ 1.0%.
4. rustless steel as claimed in claim 1 or 2, it is characterised in that the mass percent of Al in the ferritic stainless steel
Content is 0.8 ~ 1.2%.
5. stainless preparation method as claimed in claim 1 or 2, it is characterised in that with high chrome, pure iron, pure titanium, pure
Aluminum, pure molybdenum, ferrosilicon, sulfur ferrum, fine copper and the pure cerium of rare earth are raw material, and using the method for induction melting steel billet is casting continuously to form, and steel billet is 950
After ~ 1150 DEG C of hammer coggings, section bar is rolled into then at 950 ~ 1150 DEG C, the section bar after hot rolling is at solid solution at 1000 ~ 1100 DEG C
Reason quenches rapid cooling after 1 ~ 5 hour, with temper 1 ~ 5 hour at 600 ~ 750 DEG C, then furnace cooling or air cooling.
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| CN111471918A (en) * | 2020-03-30 | 2020-07-31 | 山西太钢不锈钢股份有限公司 | Soft magnetic stainless steel and method for manufacturing soft magnetic stainless steel wire |
| CN114606440A (en) * | 2022-02-28 | 2022-06-10 | 浙江青山钢铁有限公司 | High-performance soft magnetic stainless steel and preparation method thereof |
| CN114746569A (en) * | 2019-12-20 | 2022-07-12 | 株式会社Posco | Ferritic stainless steel with improved magnetization and method for manufacturing same |
| CN115287544A (en) * | 2022-08-24 | 2022-11-04 | 浙江青山钢铁有限公司 | Soft magnetic stainless steel wire rod with excellent welding performance and manufacturing method thereof |
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