Soft-magnetic wire, soft-magnetic bar steel, and soft-magnetic part

Abstract

To provide a soft-magnetic wire, a soft-magnetic bar steel, and a soft-magnetic part which can achieve sufficient electrical resistivity and have sufficient magnetic flux density in a low magnetic field region.SOLUTION: This soft-magnetic wire or bar steel satisfies a specific chemical composition and satisfies formulas (1) and (2). F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38≥19.0 (1) and F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≥1.360 (2).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to soft magnetic wire and steel bars, and soft magnetic components. [Background technology]

[0002] In response to the trend toward energy conservation in automobiles, etc., many of the electrical components (especially electromagnetic components) in automobiles, etc. are required to be more power-efficient and have improved responsiveness. Therefore, the steel materials that make up the electrical components are required to have sufficient electrical resistivity and, as magnetic properties, to have high magnetic flux density in a weak external magnetic field.

[0003] As the above-mentioned steel material, soft magnetic steel material is usually used, in which the magnetic flux density inside the steel material is easily responsive to an external magnetic field. Specific examples of the soft magnetic steel material include ultra-low carbon steel (pure iron-based soft magnetic material) with a C content of approximately 0.1% by mass or less. Generally, wire rods and steel bars are widely used as forms of soft magnetic steel material.

[0004] Patent Document 1 discloses a soft magnetic steel material that can achieve a high AC magnetic flux density even in a medium magnetic field region of about 800 A / m. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-228717 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, as electrification has progressed more rapidly than ever before and demands for energy conservation have become more stringent, electrical components (e.g., hydraulic control solenoids) are being required to achieve even greater power savings and improved responsiveness. Therefore, the soft magnetic steel materials used in electrical components are being required to have sufficient electrical resistivity and high magnetic flux density (mainly DC magnetic flux density) even in weaker magnetic fields (e.g., 400 A / m). From an economical perspective, the elimination of the magnetic annealing process, which requires precise control of the furnace atmosphere and temperature during heat treatment, is also being considered. However, Patent Document 1 does not consider improving the magnetic flux density in the low magnetic field region or omitting the magnetic annealing step.

[0007] The present disclosure has been made in consideration of these circumstances, and aims to provide a soft magnetic wire or soft magnetic steel bar, as well as a soft magnetic component, that can achieve sufficient electrical resistivity and have sufficient magnetic flux density in a low magnetic field region even in a state where it has not been magnetically annealed. [Means for solving the problem]

[0008] Aspect 1 of the present invention is C: 0.060 mass% or less (excluding 0 mass%), Si: more than 0.30 mass% and less than 2.10 mass% Mn: 0.20 mass% or more and less than 0.50 mass% P: 0.012% by mass or less (including 0% by mass), S: 0.050 mass% or less (including 0 mass%), Cu: 0.30 mass% or less (including 0 mass%) Ni: 0.30 mass% or less (including 0 mass%) Cr: 0.30% by mass or less (including 0% by mass), Al: 0.100% by mass or less (including 0% by mass), and N: 0.0100% by mass or less (including 0% by mass) and the remainder being iron and unavoidable impurities, The soft magnetic wire or steel bar satisfies the following formulas (1) and (2). F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38 ≧19.0 (1) F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≧1.360 ···(2) In formulas (1) and (2), [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Cr], [Al], and [N] represent the contents of C, Si, Mn, P, S, Cu, Ni, Cr, Al, and N, respectively, expressed in mass%.

[0009] Aspect 2 of the present invention is C: 0.060 mass% or less (excluding 0 mass%), Si: more than 0.30 mass% and less than 2.10 mass% Mn: 0.20 mass% or more and less than 0.50 mass% P: 0.012% by mass or less (including 0% by mass), S: 0.050 mass% or less (including 0 mass%), Cu: 0.30 mass% or less (including 0 mass%) Ni: 0.30 mass% or less (including 0 mass%) Cr: 0.30% by mass or less (including 0% by mass), Al: 0.100% by mass or less (including 0% by mass), and N: 0.0100% by mass or less (including 0% by mass) and the remainder being iron and unavoidable impurities, A soft magnetic component that satisfies the following formulas (1) and (2). F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38 ≧19.0 (1) F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≧1.360 ···(2) In formulas (1) and (2), [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Cr], [Al], and [N] represent the contents of C, Si, Mn, P, S, Cu, Ni, Cr, Al, and N, respectively, expressed in mass%. [Effects of the Invention]

[0010] According to one embodiment of the present invention, it is possible to provide a soft magnetic wire or soft magnetic steel bar and a soft magnetic component that can achieve sufficient electrical resistivity and have sufficient magnetic flux density in a low magnetic field region even in a state where they are not magnetically annealed. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present inventors have conducted extensive research to solve the above problems, and as a result, have found that by appropriately adjusting the chemical composition to satisfy formula (1) so as to achieve sufficient electrical resistivity, and also satisfying formula (2), sufficient magnetic flux density can be ensured in a low magnetic field region even in a state where no magnetic annealing has been performed. Hereinafter, each requirement defined in the embodiment of the present invention will be described in detail.

[0012] 1.Chemical composition The present invention is directed to a soft magnetic wire or a soft magnetic steel bar, and a soft magnetic part. The chemical composition of the soft magnetic wire or the soft magnetic steel bar will be described below. In this specification, in a preferred embodiment, the "wire rod" and "steel bar" have a circular cross section perpendicular to the longitudinal direction, but this is not limited thereto and may be a shape other than a circle, such as a square or a polygon including a regular hexagon. If the cross section is not circular, the ratio of the longitudinal direction to the lateral direction within the cross section is 2 or less. In the case of wire rod, its diameter (equivalent circle diameter if the cross section is a shape other than a circle) is not particularly limited, but is, for example, 4 mm to 55 mm. In the case of steel bar, its diameter (equivalent circle diameter if the cross section is a shape other than a circle) is not particularly limited, but is, for example, 18 mm to 105 mm.

[0013] [C: 0.060% by mass or less (excluding 0% by mass)] C is an element necessary for ensuring mechanical strength, and a small amount can increase electrical resistance and suppress deterioration of magnetic properties due to eddy currents. However, C dissolves in steel, distorting the crystal lattice and reducing the magnetic moment, so excessive C content degrades magnetic properties. Therefore, the C content is set to 0.060% by mass or less, preferably 0.040% by mass or less, more preferably 0.020% by mass or less, and even more preferably 0.010% by mass or less. There is no particular lower limit for the C content, but since the increase in magnetic moment due to reduced C content saturates at 0.001% by mass, a lower limit of 0.001% by mass is preferred to ensure minimum strength.

[0014] In this specification, "not containing 0% by mass" means that the element is intentionally added, i.e., the element is contained in an amount exceeding the impurity level. On the other hand, in this specification, "containing 0% by mass" means that the element can be any added element and includes embodiments in which the element is not intentionally added, i.e., the content is at or below the unavoidable impurity level (it does not exclude cases in which the element is intentionally added).

[0015] [Si: more than 0.30 mass% and less than 2.10 mass%] Si is an element that acts as a deoxidizer during melting and refining, and also increases electrical resistance, suppressing deterioration of magnetic properties due to eddy currents. Therefore, the Si content is set to more than 0.30 mass%, preferably 0.50 mass% or more, more preferably 0.60 mass% or more, and even more preferably 1.0 mass% or more. However, excessive solid solution of Si reduces the magnetic moment in the steel and also reduces cold forgeability. Therefore, the Si content is set to less than 2.10 mass%, preferably 2.04 mass% or less, and even more preferably 2.00 mass% or less.

[0016] [Mn: 0.20 mass% or more, less than 0.50 mass%] Mn is an element that acts as a deoxidizer during melting and refining, and by combining with S in the steel, it suppresses embrittlement caused by S. Mn in steel increases the electrical resistance of parts as a solid solution or precipitate, and can suppress deterioration of magnetic properties due to eddy currents. Therefore, the Mn content is set to 0.20% by mass or more. However, if the Mn content is excessive, the magnetic moment in the steel decreases, resulting in deterioration of magnetic properties. Therefore, the Mn content is set to less than 0.50% by mass, preferably 0.40% by mass or less, and more preferably 0.35% by mass or less.

[0017] [P: 0.012% by mass or less (including 0% by mass)] P has the effect of increasing electrical resistance, but is an element that is prone to segregation at grain boundaries and has a negative effect on hot workability and cold workability, so it is desirable to reduce the P content as much as possible. Therefore, the P content is set to 0.012% by mass or less, preferably 0.010% by mass or less.

[0018] [S: 0.050% by mass or less (including 0% by mass)] S increases the electrical resistance of parts and suppresses the deterioration of magnetic properties due to eddy currents. Furthermore, as mentioned above, S combines with Mn to form MnS, so adding S within an appropriate range improves magnetic properties. However, excessive S content reduces magnetic properties and forgeability due to the formation of FeS. Taking these effects into consideration, the S content is set to 0.050% by mass or less. There is no particular lower limit for the S content, but it can be 0% by mass or more. For example, in the case of a steel material containing Mn, it is preferable to include 0.002% by mass or more.

[0019] [Cu: 0.30 mass% or less (including 0 mass%)] Cu is an optional additive element. By dissolving in the ferrite phase, Cu improves strength and magnetic properties by increasing electrical resistivity. On the other hand, excessive Cu content deteriorates magnetic properties and cold forgeability, and also increases costs. Therefore, the Cu content is set to 0.30% by mass or less, preferably 0.20% by mass or less, and more preferably 0.10% by mass or less.

[0020] [Ni: 0.30 mass% or less (including 0 mass%)] Ni is an optional additive element. Ni improves strength, similar to Cu. However, excessive Ni content deteriorates magnetic properties and forgeability and increases costs. Therefore, the Ni content is set to 0.30% by mass or less, preferably 0.20% by mass or less, and more preferably 0.10% by mass or less.

[0021] [Cr: 0.30% by mass or less (including 0% by mass)] Cr is an optional additive element. Cr increases the electrical resistance of parts and suppresses degradation of magnetic properties due to eddy currents. On the other hand, excessive Cr content deteriorates magnetic properties and forgeability, and increases costs. Therefore, the Cr content is set to 0.30% by mass or less, preferably 0.20% by mass or less, and more preferably 0.10% by mass or less.

[0022] [Al: 0.100% by mass or less (including 0% by mass)] Al is an optional additive element. Al bonds with N to form AlN, which can suppress deterioration of magnetic properties due to a decrease in magnetic moment. On the other hand, excessive Al content results in the formation of excessive AlN, which inhibits grain growth and increases grain boundaries that are harmful to magnetic properties. Furthermore, Al that does not bond with N dissolves in the steel, reducing the magnetic moment and degrading magnetic properties. Therefore, when Al is intentionally added (when the Al content exceeds 0 mass%), the Al content should be 0.100 mass% or less, preferably 0.070 mass% or less, more preferably less than 0.05 mass%, even more preferably 0.030 mass% or less, and even more preferably less than 0.002 mass%.

[0023] [N: 0.0100% by mass or less (including 0% by mass)] As mentioned above, N combines with Al to form AlN, so adding N in an appropriate range improves magnetic properties. However, excessive N content dissolves in the steel, reducing the magnetic moment and degrading magnetic properties, and also causes deterioration of forgeability due to age hardening. Therefore, the N content is set to 0.0100% by mass or less, preferably 0.0070% by mass or less, more preferably 0.0050% by mass or less, and even more preferably 0.0030% by mass or less.

[0024] The basic components of the wire rods and steel bars and soft magnetic components according to the embodiments of the present specification are as described above, and in one preferred embodiment, the balance is iron and inevitable impurities. As inevitable impurities, elements (e.g., As, Sb, Sn, O, H, etc.) that are introduced due to the conditions of raw materials, materials, manufacturing facilities, etc. are allowed to be mixed in. For example, there are elements such as P, whose content is usually the lower the better, and therefore which are unavoidable impurities, but whose composition ranges are separately defined as above. Therefore, in this specification, the "unavoidable impurities" that make up the balance are a concept that excludes elements whose composition ranges are separately defined.

[0025] 2.F1 (parameters related to electrical resistivity) The present inventors came up with the idea of ​​adjusting the chemical composition to satisfy the following formula (1) in order to achieve electrical resistivity sufficient to improve the responsiveness of soft magnetic components, particularly to DC magnetic fields. F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38 ≧19.0 (1) In formula (1), [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Cr], [Al], and [N] represent the contents of C, Si, Mn, P, S, Cu, Ni, Cr, Al, and N, respectively, expressed in mass%.

[0026] The coefficients of F1 and the calculation procedures thereof are as disclosed in Patent Document 1. By adjusting the chemical composition so that F1 is 19.0 or more, a sufficient electrical resistivity (≈19.0 μΩcm or more) can be achieved.

[0027] 3.F2 (parameter related to magnetic flux density) Even in a non-magnetically annealed state, increasing the magnetic moment in the ferrite phase is important for improving the magnetic flux density in low magnetic fields of soft magnetic components. Generally, increasing the content of alloying elements to increase electrical resistivity tends to decrease the magnetic moment. However, it is also known that when precipitates are formed by bonding between alloying elements, the magnetic moment in the ferrite phase can increase or decrease depending on the amount of alloying elements dissolved in the ferrite phase and the fraction of the precipitates. Therefore, in order to express the relationship between the content of alloying elements and magnetic flux density with a single index, the inventors performed multiple regression analysis using the content (mass%) of each alloying element in the soft magnetic steel materials shown in the examples (Test Nos. 1 to 7 (Test Material Nos. A to G)) described later as an explanatory variable and the magnetic flux density B4 (unit: T) at 400 A / m of the soft magnetic part before magnetic annealing as a target variable. As a result, the coefficient of determination R 2=0.9958 was derived. Based on this, a parameter F2 for designing the magnetic flux density B4 at 400 A / m was found, as shown in the following formula (2). F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≧1.360 ···(2) In the formula (2), [C], [Si], [Mn], [S] and [N] represent the contents of C, Si, Mn, S and N, respectively, expressed in mass %.

[0028] As shown in the above formula (2), by adjusting the chemical composition so that F2 is 1.360 or more, a sufficient magnetic flux density B4 (≈1.36 T or more) can be obtained. By using soft magnetic wire or steel bar having a sufficient magnetic flux density B4, as well as soft magnetic components (e.g., iron cores of solenoids), it is possible to realize, for example, electrical components (e.g., solenoids for hydraulic control) with sufficient attractive force.

[0029] 4. Manufacturing method The soft magnetic wire or steel bar according to the embodiment of the present invention can be produced by a known method so as to satisfy the above-mentioned chemical composition, F1 and F2. For example, it may be produced by melting and casting a steel raw material that satisfies the above-mentioned chemical composition, F1 and F2, and then hot rolling it.

[0030] In this specification, as described above, wire rod or steel bar includes one having a circular cross section perpendicular to the longitudinal direction (although as described above, the cross section may be other than circular). Such wire rod or steel bar can be obtained by the above-mentioned hot rolling or hot forging and stretching, but in addition, one obtained in a desired shape by further performing cold working such as cold drawing after hot rolling or hot forging and stretching is also included in the "wire rod" or "steel bar" of the present invention.

[0031] Unlike, for example, an electromagnetic steel sheet, the soft magnetic wire and steel bar according to the embodiment of the present invention can have improved magnetic properties by magnetic annealing. The soft magnetic wire and steel bar according to the embodiment of the present invention have sufficient magnetic flux density in a low magnetic field region even in a state where they are not magnetically annealed, but they may be subjected to magnetic annealing as necessary.

[0032] 5.Soft magnetic parts Soft magnetic components can be obtained by processing the wire rods and steel bars according to the embodiments of the present invention. However, this is not limited to this. As long as the wire rods and steel bars according to the embodiments of the present invention have the above-mentioned chemical composition, they can also be obtained using other steel materials, particularly other wire rods or steel bars. Soft magnetic components obtained in this manner are also within the technical scope of the present invention. Soft magnetic components obtained using wire rods or steel bars often have a circular periphery or a partially deformed circular shape in a cross section perpendicular to the axial direction (e.g., in one or more cross sections when multiple cross sections are observed). However, this is not a characteristic of all soft magnetic components obtained using wire rods or steel bars, and some do not have this characteristic.

[0033] Soft magnetic parts include various electromagnetic parts used in automobiles, trains, ships, etc., including iron core materials for electromagnetic valves, solenoids, relays, etc., magnetic shielding materials, actuator components, and motor / sensor components.

[0034] To process soft magnetic wire or steel bar into soft magnetic parts, for example, hot forging may be performed, followed by cutting as needed. Forging as a forming process may be either hot forging or cold forging, but hot forging can reduce the effects of processing strain. To further improve magnetic properties, hot forging is preferably performed at 1100°C or higher.

[0035] The magnetic properties of the soft magnetic component according to the embodiment of the present invention can be improved by magnetic annealing. The soft magnetic component according to the embodiment of the present invention has sufficient magnetic flux density in a low magnetic field region even in a state where it is not magnetically annealed. However, magnetic annealing may be performed as necessary. For example, magnetic annealing may be performed on a soft magnetic component after hot forging and / or cutting. [Example]

[0036] The following examples are provided to more specifically describe the embodiments of the present invention. The embodiments of the present invention are not limited to the following examples, and may be modified as appropriate within the scope of the above-described and below-described aims, and all such modifications are within the technical scope of the embodiments of the present invention.

[0037] Test materials Nos. A to G, having the chemical compositions shown in Table 1, were produced by button melting to obtain cast materials. The resulting cast materials were heated to 1000 to 1100°C, then hot forged and stretched, and then normalized at 950°C for 1 hour to produce wire rods with a diameter of 10 mm. Test materials Nos. H to I, having the chemical compositions shown in Table 1, were produced by vacuum melting to obtain cast materials. The resulting cast materials were heated to 1000 to 1100°C, then hot forged and stretched, and then normalized at 900°C for 1 hour to produce wire rods with a diameter of 10 mm. Note that the melting method for test materials Nos. H to I was different from that for test materials Nos. A to G, but the subsequent normalization was performed, so it is believed that the effects of the different melting methods were eliminated.

[0038] [Table 1]

[0039] The obtained wire was wire-cut to obtain cylindrical test pieces with a diameter of 8 mm and a length of 12 mm, with the centers of the cylinders aligned before and after processing. The cylindrical test pieces were hot-worked using a hot-working simulation test device (THERMECMASTOR_Z manufactured by Fuji Electric Machinery Co., Ltd.). Specifically, the temperature was first raised to 1200°C at 10°C / s and held there for 300 seconds. The test pieces were then cooled to 1100°C at 5°C / s and compressed at a reduction rate of 60% and a strain rate of 1.0 / s. After compression was complete, the test pieces were cooled to 500°C at 5°C / s and then cooled to room temperature by gas blowing.

[0040] The compressed cylindrical test pieces were processed into ring shapes with an outer diameter of 10 mm, an inner diameter of 6 mm, and a thickness of 3 mm to obtain ring-shaped test pieces (soft magnetic parts) for Test Nos. 1 to 7 and 9 to 10 (see Table 2 for the test materials used). At this time, the center of the cylinder before processing was aligned with the center of the ring after processing.

[0041] A ring-shaped test piece was uniformly wound around the circumference of the ring with an insulating-coated conductor as a magnetic field application coil and a magnetic flux detection coil. After demagnetization by applying an AC magnetic field, a BH curve was measured at room temperature using a DC current under a maximum magnetic field of 400 A / m, and the magnetic flux density B4 at 400 A / m was determined. After measuring the magnetic flux density B4, the ring-shaped test piece of Test No. 1 was unwound and subjected to magnetic annealing in a vacuum furnace at 850°C for 3 hours (referred to as Test No. 8). The magnetic flux density B4 was then measured again using the procedure described above. The results are summarized in Table 2. Note that "F1" and "F2" in Table 2 are values ​​calculated using formulas (1), (2), and the chemical composition listed in Table 1.

[0042] [Table 2]

[0043] The following can be observed from Tables 1 and 2. Test Nos. 1, 5, 9, and 10 are examples that satisfy all of the requirements stipulated in the embodiments of the present invention, in which F1 was adjusted to a predetermined value or greater so as to achieve sufficient electrical resistivity (i.e., F1≧19.0), and even in a state in which magnetic annealing was not performed, they had sufficient magnetic flux density in the low magnetic field region (i.e., magnetic flux density B4≧1.36). On the other hand, Test Nos. 2 to 4 and 6 to 7 are examples that do not satisfy the requirements defined in the embodiment of the present invention, in which F1 was less than 19.0 or the magnetic flux density B4 was insufficient.

[0044] In Test No. 2, F2 was less than 1.360, and the magnetic flux density B4 was insufficient.

[0045] In Test No. 3, the C content was excessive, F2 was less than 1.360, and the magnetic flux density B4 was insufficient.

[0046] In Test No. 4, the Si content was insufficient, F1 was less than 19.0, and based on Patent Document 1, it is presumed that the electrical resistivity was insufficient.

[0047] Test No. 6 had an excessive Si content, F2 was less than 1.360, and the magnetic flux density B4 was insufficient.

[0048] In Test No. 7, the Mn content was excessive, F2 was less than 1.360, and the magnetic flux density B4 was insufficient.

[0049] Test No. 8 is an example in which magnetic annealing was performed, unlike Test Nos. 1 to 7, 9, and 10. Test No. 8 exhibited a high magnetic flux density B4 by performing magnetic annealing.

Claims

1. C: 0.060% by mass or less (excluding 0% by mass), Si: more than 0.30% by mass and less than 2.10% by mass; Mn: 0.20% by mass or more and less than 0.50% by mass, P: 0.012% by mass or less (including 0% by mass), S: 0.050% by mass or less (including 0% by mass), Cu: 0.30 mass% or less (including 0 mass%), Ni: 0.30 mass% or less (including 0 mass%), Cr: 0.30% by mass or less (including 0% by mass), Al: 0.100% by mass or less (including 0% by mass), and N: 0.0100% by mass or less (including 0% by mass) and the remainder being iron and unavoidable impurities, A soft magnetic wire or steel bar that satisfies the following formulas (1) and (2): F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38 ≧19.0...(1) F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≧1.360...(2) In the formulas (1) and (2), [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Cr], [Al], and [N] represent the contents of C, Si, Mn, P, S, Cu, Ni, Cr, Al, and N, respectively, expressed in mass%.

2. C: 0.060% by mass or less (excluding 0% by mass), Si: more than 0.30% by mass and less than 2.10% by mass; Mn: 0.20% by mass or more and less than 0.50% by mass, P: 0.012% by mass or less (including 0% by mass), S: 0.050% by mass or less (including 0% by mass), Cu: 0.30 mass% or less (including 0 mass%), Ni: 0.30 mass% or less (including 0 mass%), Cr: 0.30% by mass or less (including 0% by mass), Al: 0.100% by mass or less (including 0% by mass), and N: 0.0100% by mass or less (including 0% by mass) and the remainder being iron and unavoidable impurities, A soft magnetic component that satisfies the following formulas (1) and (2): F1=97.0[C]+10.9[Si]+4.2[Mn]+23.8[P]+172.0[S]+15.0[Cu]-0.03[Ni]+5.1[Cr]+8.6[Al]+34.0[N]+8.38 ≧19.0...(1) F2=-9.43[C]-0.0061[Si]-0.12[Mn]+0.054[S]+23.5[N]+1.398≧1.360...(2) In the formulas (1) and (2), [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Cr], [Al], and [N] represent the contents of C, Si, Mn, P, S, Cu, Ni, Cr, Al, and N, respectively, expressed in mass%.

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