Method for improving brittleness of iron-based nanocrystalline soft magnetic alloy strip
A soft magnetic alloy ribbon, iron-based nanocrystal technology, which is applied in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problem of reducing the volume fraction of the crystalline phase in the alloy, complicated heat treatment steps, and reducing the alloy Bs. and other problems, to achieve the effect of reducing strength, facilitating subsequent processing and forming, and reducing requirements
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Embodiment 1
[0034] Fe 77 Si 10.5 B 9 Nb 2.5 Cu 1
[0035] (1) Preparation of quenched alloy strip
[0036] a, use Fe, Si, B, Nb and Cu raw materials with a purity greater than 95% (mass percentage) to carry out weighing and batching according to the alloy nominal composition; adopt non-consumable electric arc furnace to repeatedly smelt the raw materials four times under an argon atmosphere, Obtain a master alloy ingot with a uniform composition; use a single-roll strip stripping device to prepare a quenched alloy strip under an argon atmosphere, the thickness of the quenched alloy strip is about 20 μm, and the width is about 2mm;
[0037] b, using X-ray diffractometer (XRD) (Cu Kα radiation, wavelength λ=0.15406nm) to detect the structure of the quenched alloy strip, figure 1 is the XRD spectrum of the as-quenched alloy strip, by figure 1 It can be determined that the quenched alloy strip has an amorphous structure;
[0038] (2) Heat treatment of quenched alloy strip
[0039] a....
Embodiment 2
[0046] Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3
[0047] (1) Preparation of quenched alloy strip:
[0048] The batching, master alloy ingot, strip preparation and structural testing steps are the same as in Example 1.
[0049] (2) Heat treatment of quenched alloy strip
[0050] The heat treatment step can refer to embodiment 1. The difference between this implementation and Example 1 is: the set heating rates are 10°C / min, 100°C / min, 200°C / min and 400°C / min; the holding time is 15min; After cooling down to 400°C, take it out and let it cool to room temperature in air.
[0051] (3) Performance test of nanocrystalline ribbon
[0052] a. The magnetic property test procedure is the same as that in Example 1, and the detailed data are listed in Table 1. It can be seen from Table 1 that when the heating rate increases from 10°C / min to 400°C / min, the B of the strip s From 1.24T to 1.25T, H c Reduced from 0.8A / m to 0.5A / m. In addition, the soft magnetic properties of the samples hea...
Embodiment 3
[0055] Fe 77.7 Si 4 B 13 Cu 1.3 Nb 4
[0056] (1) Preparation of quenched alloy strip:
[0057] Batching, master alloy ingot, strip material preparation and structure detection steps are the same as embodiment 1;
[0058] (2) Heat treatment of quenched alloy strip
[0059] The heat treatment step can refer to embodiment 1. This implementation step is different from Example 1 in that: the set heating rate is 10°C / min, 300°C / min and 600°C / min respectively; the holding temperature is 510°C; the holding time is 15min; the heat treatment of simulated industrial production The conditions are: the holding temperature is 510°C, and the holding time is 50 minutes;
[0060] (3) Performance test of nanocrystalline ribbon
[0061] a. The magnetic property test procedure is the same as that in Example 1, and the detailed data are listed in Table 1. It can be seen from Table 1 that when the heating rate increases from 10°C / min to 600°C / min, the B of the strip s From 1.45T to 1.46...
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