High-phosphorus-content steel alloy and preparation method and application thereof

Abstract

The invention relates to a high-phosphorus-content steel alloy and a preparation method and application thereof, and belongs to the technical field of alloys. The high-phosphorus-content steel alloy comprises the following components: Fe, P, MA, MB and MC, mA comprises at least one of Cr, Mn, Co, Ni, Cu, Sn, Zr, Mo, Sc, W and Hf; the MB is at least two of B, C and Si; the MC comprises at least one of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Td, Dy, Ho, Er, Tm, Yb and Lu; in the high-phosphorus-content steel alloy, the molar percentage of Fe is 50%-80%, the molar percentage of P is 1%-20%, the molar percentage of MA is 1%-10%, the molar percentage of MB is 0%-10%, and the molar percentage of MC is 0%-5%. The high-phosphorus-content steel alloy has good mechanical properties, adjustable brittleness and toughness, and excellent magnetic properties and corrosion resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of alloys, and in particular to a high-phosphorus steel alloy and a preparation method and application thereof. Background Art

[0002] Phosphorus is generally considered a harmful element in steel. Although it can improve the strength and hardness of steel, it will also cause a significant decrease in the plasticity and impact toughness of steel. Especially under low temperature conditions, it will cause the steel to become significantly brittle. People call this phenomenon "cold brittleness". "Cold brittleness" makes the cold processing and welding performance of steel worse. The higher the phosphorus content, the greater the cold brittleness. Therefore, the phosphorus content in steel is strictly controlled. Among them, the phosphorus content of high-quality steel is usually less than 0.025%, the phosphorus content of high-quality steel is generally less than 0.04%, and the phosphorus content of ordinary steel will not exceed 0.085%. However, as research has found, although phosphorus is prone to segregation and causes alloy embrittlement, increasing the phosphorus content in the alloy has the effect of inhibiting crystallization and promoting amorphous formation. Therefore, FeP-based amorphous alloys have been developed.

[0003] However, the toughness of FeP-based amorphous alloys is still poor. To address this problem, the prior art (CN102787281A) discloses a high-toughness iron-phosphorus-based amorphous alloy strip and a preparation method thereof. The chemical formula of the iron-phosphorus-based amorphous alloy is Fe a P b B c M d , where M is at least one of Nb, V, Ta and Ti; in terms of atomic percentage, a is 100-bcd%, b is 2% to 20%, c is 0.5% to 15%, and d is 0.5% to 5%. The specific M element has a strong chemical interaction with Fe, P and B to reduce the size of P segregated particles, thereby improving the toughness of the FeP-based amorphous alloy; however, the magnetic properties and corrosion resistance of the FeP-based amorphous alloy are poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-phosphorus steel alloy and a preparation method and application thereof.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a high-phosphorus steel alloy, the high-phosphorus steel alloy comprising Fe, P, MA, MB and MC;

[0007] The MA includes at least one of Cr, Mn, Co, Ni, Cu, Sn, Zr, Mo, Sc, W, and Hf;

[0008] The MB is at least two of B, C and Si;

[0009] The MC includes at least one of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Td, Dy, Ho, Er, Tm, Yb, and Lu;

[0010] The molar percentage of Fe in the high-phosphorus steel alloy is 50% to 80%, the molar percentage of P is 1% to 20%, the molar percentage of MA is 1% to 10%, the molar percentage of MB is 0% to 10%, and the molar percentage of MC is 0% to 5% (the sum of the molar percentages of the components in the high-phosphorus steel alloy is 100%).

[0011] The present invention combines Fe with a high content of P, and at the same time matches it with a specific metal element MA, a non-metal element MB and a rare earth element MC, and uses the metal element MA and Fe to form an alloy to improve the overall performance of the alloy material, while the non-metal element MB can cooperate with P to jointly construct a dissimilar model, and at the same time, by adding a trace amount of the rare earth element MC, the strength, toughness, wear resistance, corrosion resistance and other properties of the alloy can also be adjusted. On the whole, the present invention obtains a high-phosphorus steel alloy with high strength, low modulus, high corrosion resistance, high saturation magnetic induction intensity, low iron loss and low magnetostriction by replacing dissimilar elements.

[0012] Optionally, the molar percentage of Fe in the high phosphorus steel alloy can be any one of 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80% or any two of the range values; the molar percentage of P can be any one of 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20% or any two of the range values; the molar percentage of MA can be any one of 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20% or any two of the range values; The molar percentage can be specifically any one of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any two of the range values; the molar percentage of MB can be specifically any one of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any two of the range values; the molar percentage of MC can be specifically any one of 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% or any two of the range values.

[0013] As a preferred embodiment of the high-phosphorus steel alloy of the present invention, the molar percentage of Fe in the high-phosphorus steel alloy is 50% to 80%, the molar percentage of P is 5% to 20%, the molar percentage of MA is 3% to 15%, the molar percentage of MB is 5% to 10%, and the molar percentage of MC is 2% to 5%.

[0014] Preferably, the MA is at least one of Cr, Co, Ni, and Mn, and the MC is at least one of Y, Lu, and Pr. Among them, Cr is beneficial to improving the corrosion resistance of the high-phosphorus steel alloy, Co and Ni can adjust the magnetic properties of the high-phosphorus steel alloy, and Mn can regulate the mechanical properties of the high-phosphorus steel alloy.

[0015] More preferably, the high phosphorus steel alloy is Fe 75 P 13 Cr7B2C3 (i.e. the molar percentages of Fe, P, Cr, B and C are 75%, 13%, 7%, 2% and 3% respectively), Fe 65 P8Co 15 Ni3B5C3Y1 (i.e. the molar percentages of Fe, P, Co, Ni, B, C and Y are 65%, 8%, 15%, 3%, 5%, 3% and 1% respectively), Fe 50 P 18 Cr8Mn 15 B5C3Lu1 (i.e. the molar percentages of Fe, P, Cr, Mn, B, C and Lu are 50%, 18%, 8%, 15%, 5%, 3% and 1% respectively), Fe 70 P 10 Mn 15 B3C2 (i.e. the molar percentages of Fe, P, Mn, B and C are 70%, 10%, 15%, 3% and 2% respectively), Fe 80 P 15 Co3B1C1 (i.e. the molar percentages of Fe, P, Co, B and C are 80%, 15%, 3%, 1% and 1% respectively), Fe 60 P 10 Mn 20 B7C2Pr1 (i.e. the molar percentages of Fe, P, Mn, B, C and Pr are 60%, 10%, 20%, 7%, 2% and 1% respectively), Fe 77 P 14 Co4C2B2Y1 (i.e. the molar percentages of Fe, P, Co, C, B and Y are 77%, 14%, 4%, 2%, 2% and 1% respectively), Fe 67 P 11 Co 14 C4B4 (i.e., the molar percentages of Fe, P, Co, C, and B are 67%, 11%, 14%, 4%, and 4%, respectively).

[0016] As a preferred embodiment of the high-phosphorus steel alloy of the present invention, the MA contains at least Co, and the content of Co is ≥ 3at%. Co in this addition amount range is more conducive to improving the magnetic properties of the high-phosphorus steel alloy.

[0017] As a preferred embodiment of the high-phosphorus steel alloy of the present invention, Co in the high-phosphorus steel alloy exists in the form of amorphous and / or nanocrystalline, and the grain size of the nanocrystalline is less than 30nm; research has found that nanocrystals with the above grain size can better regulate the macroscopic magnetostrictive properties of the high-phosphorus steel alloy, making the magnetostriction approach "0".

[0018] As a preferred embodiment of the high phosphorus steel alloy of the present invention, at least one of the following conditions is met:

[0019] a. The fracture strength of the high phosphorus steel alloy is 1053-3530 MPa, specifically 1053 MPa, 1928 MPa, 2742 MPa, 3530 MPa, etc.;

[0020] b. The elastic modulus of the high phosphorus steel alloy is 65.7 to 150.2 GPa, specifically 65.7 GPa, 96.4 GPa, 126.6 GPa, 150.2 GPa, etc.;

[0021] c. The Vickers microhardness of the high-phosphorus steel alloy is ≥8.3 GPa, and can specifically be 8.39 GPa, 10.67 GPa, 11.28 GPa, 14.15 GPa, etc.

[0022] As a preferred embodiment of the high phosphorus steel alloy of the present invention, at least one of the following conditions is met:

[0023] a. The saturation magnetic induction intensity of the high phosphorus steel alloy is ≥1.7T, specifically 1.72T, 1.78T, 1.89T, 2.11T, etc.;

[0024] b. The iron loss of the high phosphorus steel alloy under the conditions of 50Hz and 1.3T is ≤0.5W / kg, and can be specifically 0.47W / kg, 0.31W / kg, 0.26W / kg, 0.18W / kg, etc.;

[0025] c. The resistance of the high phosphorus steel alloy is ≥70 μΩ·cm, and can be specifically 78 μΩ·cm, 92 μΩ·cm, 103 μΩ·cm, 130 μΩ·cm, etc.;

[0026] d. The magnetostriction of the high phosphorus steel alloy is ≤1×10 -6 .

[0027] As a preferred embodiment of the high phosphorus steel alloy of the present invention, at least one of the following conditions is met:

[0028] a. The self-corrosion potential of the high phosphorus steel alloy is ≥ -0.28V;

[0029] b. The self-corrosion current density of the high phosphorus steel alloy is ≤ 0.005A / m2 .

[0030] In a second aspect, the present invention provides a method for preparing the above-mentioned high-phosphorus steel alloy, comprising the following steps: uniformly melting raw materials including various components at high temperature to obtain the high-phosphorus steel alloy.

[0031] Specifically, the preparation method of the above-mentioned high phosphorus steel alloy comprises the following steps:

[0032] The raw materials were weighed according to the molar percentage of each component in the high phosphorus steel alloy, and then placed in a non-consumable vacuum arc melting furnace and evacuated to 5×10 -3 Pa or less, the heating temperature is 1500-3000°C, the smelting time is 1-30min, and the raw materials are smelted evenly for 1-5 times under the smelting conditions. The alloy ingot is taken out after cooling in the furnace to ensure that the mass loss of the alloy ingot before and after smelting is less than 0.1wt%, so as to obtain a high-phosphorus steel alloy.

[0033] Optionally, the smelting temperature in S1 can be specifically 1600°C, 1800°C, 2000°C, 2200°C, 2400°C, 2600°C, or 2800°C, and the smelting time can be specifically 5 min, 10 min, 15 min, 20 min, or 25 min.

[0034] In addition, the above alloy ingots can be prepared into amorphous or nanocrystalline alloys in block, ribbon or powder form by copper mold spray casting, spin quenching or atomization.

[0035] In a third aspect, the present invention provides the use of the above-mentioned high-phosphorus steel alloy in soft magnetic materials or corrosion-resistant materials.

[0036] In a fourth aspect, the present invention provides a corrosion-resistant metal component, which is mainly made of the above-mentioned high-phosphorus steel alloy.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention combines Fe with a high content of P, and at the same time matches specific metal elements MA, non-metallic elements MB and rare earth elements MC, and obtains a high-phosphorus steel alloy with high strength, low modulus, high corrosion resistance, high saturation magnetic induction intensity, low iron loss and low magnetostriction by replacing different and similar elements. Moreover, the mechanical properties of the high-phosphorus steel alloy are adjustable in toughness and brittleness, and the modulus is adjustable, and it can be widely used in the fields of corrosion and protection, soft magnetic materials, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a SEM image of the powder of the high phosphorus steel alloy in Example 3;

[0040] Figure 2The tensile fracture SEM images of the high phosphorus steel alloys in Examples 2, 5 and 7;

[0041] Figure 3 The SEM images of the folded area of ​​the high phosphorus steel alloy strip at different annealing temperatures in Example 7;

[0042] Figure 4 hysteresis loop diagram of high phosphorus steel alloy in Examples 1, 4 and 8;

[0043] Figure 5 The graphs of open circuit potential changes over time of high phosphorus steel alloy and SUS316 stainless steel in 1M HCl solution in Examples 1, 3 and 6;

[0044] Figure 6 The potentiodynamic polarization curves of high phosphorus steel alloy and SUS316 stainless steel in Examples 1, 3 and 6 in 1M HCl solution. DETAILED DESCRIPTION

[0045] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0046] Unless otherwise specified, other materials, reagents, etc. used in the examples can be obtained from commercial sources.

[0047] Examples 1 to 8 and Comparative Examples 1 to 5

[0048] Table 1 Components and corresponding molar percentages of high phosphorus steel alloys in various embodiments and comparative examples

[0049]

[0050]

[0051] 1) The method for preparing the high phosphorus steel alloy in Example 1 comprises the following steps:

[0052] Step 1, ingredients: weigh the raw materials (total mass is 100 g) according to the molar percentage of each component of the high phosphorus steel alloy in Table 1;

[0053] Step 2: Alloy smelting: Place the raw materials weighed in step 1 into a non-consumable vacuum arc melting furnace and evacuate to 5×10 -3 Pa, the heating temperature is 1400℃, the smelting time is 5min, and the raw materials are smelted evenly under the smelting conditions. The alloy ingot is taken out after cooling in the furnace to ensure that the mass loss of the alloy ingot before and after smelting is less than 0.1wt%;

[0054] Step 3, powder atomization: put the alloy ingot prepared in step 2 into the induction furnace of the rapid solidification device to completely melt it, the vacuum degree during smelting is less than 0.1Pa, the induction current is 400mA, the smelting temperature is 1280℃, the smelting time is 3min, the spraying pressure is 0.1MPa, and the cooling rate is 10 4 K / s, and obtain a high phosphorus steel alloy.

[0055] 2) The method for preparing the high phosphorus steel alloy in Example 2 comprises the following steps:

[0056] Step 1, ingredients: weigh the raw materials (total mass is 100 g) according to the molar percentage of each component of the high phosphorus steel alloy in Table 1;

[0057] Step 2: Alloy smelting: Place the raw materials weighed in step 1 into a non-consumable vacuum arc melting furnace and evacuate to 5×10 -3 Pa, the heating temperature is 1700℃, the smelting time is 5min, and the raw materials are smelted three times under the smelting conditions to make the raw materials smelted evenly. The alloy ingot is taken out after cooling with the furnace to ensure that the mass loss of the alloy ingot before and after smelting is less than 0.1wt%;

[0058] Step 3, powder atomization: Place the alloy ingot prepared in step 2 into an induction furnace of a rapid solidification device to melt it completely. During smelting, the vacuum degree is less than 0.01 Pa, the induction current is 550 mA, the smelting temperature is 1400°C, the smelting time is 3 min, the solution nozzle pressure is 0.3 MPa, and the high-pressure water pressure is 0.8 MPa to obtain a high-phosphorus steel alloy.

[0059] 3) The method for preparing the high phosphorus steel alloy in Example 3 comprises the following steps:

[0060] Step 1, ingredients: weigh the raw materials (total mass is 100 g) according to the molar percentage of each component of the high phosphorus steel alloy in Table 1;

[0061] Step 2: Alloy smelting: Place the raw materials weighed in step 1 into a non-consumable vacuum arc melting furnace and evacuate to 5×10 -3 Pa, the heating temperature is 1800℃, the smelting time is 5min, and the raw materials are smelted evenly under the smelting conditions. The alloy ingot is taken out after cooling in the furnace to ensure that the mass loss of the alloy ingot before and after smelting is less than 0.1wt%;

[0062] Step 3, powder atomization: the alloy ingot prepared in step 2 is placed in an induction furnace of a rapid solidification device to be completely melted, the vacuum degree during smelting is less than 0.01Pa, the induction current is 650mA, the smelting temperature is 1300℃, the nozzle pressure is 0.5MPa, and the copper wheel speed is 3000 rpm to obtain a high phosphorus steel alloy (such as Figure 1 shown).

[0063] 4) The preparation method of the high phosphorus steel alloy in Examples 4 to 8 is the same as that in Example 3, the preparation method of the high phosphorus steel alloy in Comparative Examples 1 to 4 is the same as that in Example 1, and the preparation method of the high phosphorus steel alloy in Comparative Example 5 is the same as that in Example 2.

[0064] Performance Testing

[0065] The high phosphorus steel alloy powders in the embodiments and comparative examples were made into block samples by spray casting and subjected to the following tests.

[0066] 1. The mechanical properties were tested using a universal testing machine (Model 5565, produced by Instron, USA). The test results are shown in Table 2.

[0067] Table 2 Mechanical properties of high phosphorus steel alloys in Examples 1 to 4

[0068]

[0069] According to the data in Table 2, it can be seen that the fracture strength of the high-phosphorus steel alloy in Examples 1 to 4 reaches 1053 to 3530 MPa, the elastic modulus reaches 65.7 to 150.2 GPa, the Vickers microhardness reaches 8.39 to 14.15 GPa, the bending toughness reaches ε=1 (D) and can be transformed into brittleness, indicating that the high-phosphorus steel alloy of the present invention has excellent mechanical properties and adjustable toughness and brittleness.

[0070] At the same time, according to Figure 2 It can be found that Example 2 ( Figure 2 (a))、5( Figure 2 (b)) and 7( Figure 2 (c)) The fracture surfaces of the high phosphorus steel alloy samples all showed dimple morphology, indicating that the high phosphorus steel alloy of the present invention has good toughness. Figure 3 It can be seen that the thin strip sample of the high phosphorus steel alloy in Example 7 is in the quenched state ( Figure 3 (a)) and after 603K heat treatment ( Figure 3 (b)) shows a large number of shear bands formed in the folded area, while after heat treatment at 643K ( Figure 3 There is no obvious shear band formed in the folded area of ​​(c), indicating that the thin strip sample changes from toughness to brittleness after high-temperature heat treatment, indicating that the toughness and brittleness of the high-phosphorus steel alloy of the present invention are adjustable.

[0071] 2. The soft magnetic properties were tested using a vibrating sample magnetometer (Model 7307, Lakeshore, USA). The applied external magnetic field strength was 800KA / m. The test results are shown in Table 3.

[0072] Table 3 Soft magnetic properties of high phosphorus steel alloys in Examples 1, 2, 4 and 5 and Comparative Example 1

[0073]

[0074] According to the data in Table 3 and Figure 4 It can be seen that the high-phosphorus steel alloy of the present invention exhibits typical soft magnetic behavior, wherein the saturation magnetic induction intensity is above 1.7 T, and has excellent soft magnetic properties.

[0075] 3. The electrochemical performance was tested using a universal electrochemical workstation (VersaSTAT3, produced by Princeton Applied Research Institute, USA). The test results are shown in Table 4.

[0076] The test method is the conventional three-electrode method, and the test is carried out in an atmospheric environment at a temperature of 298K, wherein the test sample (high phosphorus steel alloy rod) is the working electrode, the platinum sheet is the counter electrode, the saturated calomel electrode, and the test solution is a 1M HCl solution. The test sample is placed in the test solution and soaked for 1 hour to reach a stable state before a polarization experiment is carried out. The polarization experiment uses a dynamic potential polarization scanning method to test the sample; the dynamic potential polarization scanning starts from 50mV below the open circuit potential. If pitting or activated dissolution occurs, the experiment is manually stopped. If pitting or activated dissolution does not occur, the test is automatically stopped according to the potential actually set in the experiment; the potential scanning rate of the polarization test is 0.833mV / s.

[0077] Table 4 Electrochemical properties of high phosphorus steel alloy and SUS316 in Examples 1, 3 and 6 and Comparative Examples 2 to 5

[0078]

[0079]

[0080] According to the data in Table 4 and Figure 5 It can be seen that the open circuit potential of SUS316 gradually increases in the initial stage and slowly tends to stabilize, and the stable value is about -0.315V; while the open circuit potentials of the high-phosphorus steel alloys in Examples 1, 3 and 6 all increase rapidly in the initial stage and quickly tend to stabilize, and the stable values ​​are about 0.048V, 0.066V and 0.074V, respectively, which are significantly higher than the stable value of the open circuit potential of SUS316, indicating that in 1M HCl solution, the high-phosphorus steel alloy of the present invention can form a stable surface film on its surface, thereby having excellent corrosion resistance.

[0081] according to Figure 6It can be seen that SUS316 is first activated and dissolved and then passivated but without a stable passivation zone, followed by over-passivation dissolution, which indicates that its corrosion resistance in 1M HCl solution is poor; in comparison, the high-phosphorus alloy of the present invention has similar polarization behavior under the same conditions, that is, both can undergo self-passivation, have high self-corrosion potential, low self-corrosion current density, low passivation current density, wide passivation zone and high over-passivation dissolution potential, that is, the high-phosphorus steel of the present invention has excellent corrosion resistance in 1M HCl solution.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A high phosphorus steel alloy, characterized in that: The high phosphorus steel alloy comprises Fe, P, MA, MB and MC; The MA includes at least one of Cr, Mn, Co, Ni, Cu, Sn, Zr, Mo, Sc, W, and Hf; The MB is at least two of B, C and Si; The MC includes at least one of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Td, Dy, Ho, Er, Tm, Yb, and Lu; The molar percentage of Fe in the high-phosphorus steel alloy is 50% to 80%, the molar percentage of P is 1% to 20%, the molar percentage of MA is 1% to 10%, the molar percentage of MB is 0% to 10%, and the molar percentage of MC is 0% to 5%.

2. The high phosphorus steel alloy according to claim 1, characterized in that The molar percentage of Fe in the high-phosphorus steel alloy is 50% to 80%, the molar percentage of P is 5% to 20%, the molar percentage of MA is 3% to 15%, the molar percentage of MB is 5% to 10%, and the molar percentage of MC is 2% to 5%.

3. The high phosphorus steel alloy according to claim 1, characterized in that: The MA at least contains Co, and the content of Co is ≥3at%.

4. The high phosphorus steel alloy according to claim 3, characterized in that The Co in the high phosphorus steel alloy exists in the form of amorphous and / or nanocrystalline, and the grain size of the nanocrystalline is less than 30 nm.

5. The high phosphorus steel alloy according to claim 1, characterized in that: Satisfy at least one of the following: a. The fracture strength of the high phosphorus steel alloy is 1053-3530 MPa; b. The elastic modulus of the high phosphorus steel alloy is 65.7 to 150.2 GPa; c. The Vickers microhardness of the high phosphorus steel alloy is ≥8.3 GPa.

6. The high phosphorus steel alloy according to claim 1, characterized in that Satisfy at least one of the following: a. The saturation magnetic induction intensity of the high phosphorus steel alloy is ≥1.7T; b. The iron loss of the high phosphorus steel alloy is ≤0.5W / kg under the conditions of 50Hz and 1.3T; c. The electrical resistance of the high phosphorus steel alloy is ≥70 μΩ·cm; d. The magnetostriction of the high phosphorus steel alloy is ≤1×10 -6 .

7. The high phosphorus steel alloy according to claim 1, characterized in that Satisfy at least one of the following: a. The self-corrosion potential of the high phosphorus steel alloy is ≥ -0.28V; b. The self-corrosion current density of the high phosphorus steel alloy is ≤ 0.005A / m 2 .

8. The method for preparing a high phosphorus steel alloy according to any one of claims 1 to 7, characterized in that: The following steps are involved: The raw materials including various components are melted uniformly at high temperature to obtain a high-phosphorus steel alloy.

9. Use of the high phosphorus steel alloy according to any one of claims 1 to 7 in soft magnetic materials or corrosion-resistant materials.

10. A corrosion-resistant metal component, characterized in that: The invention is mainly made of the high-phosphorus steel alloy as claimed in any one of claims 1 to 7.

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