Method for preparing iron nanofiber
A technology of nano-iron and fiber, which is applied in the field of nano-materials, can solve the problems of complex nano-iron fiber process, uneven diameter of nano-iron fiber, and inconspicuous interface enhancement effect, so as to achieve easy control of the preparation process, improve interface enhancement effect, The effect of large amount of deformation
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Embodiment 1
[0023] Put industrial pure iron with a purity of 99.99% and electrolytic copper with a purity of 99.98% in a vacuum induction furnace at a weight ratio of 1:2, heat to 1600°C under 0.1Pa atmospheric pressure and melt; Fill the induction furnace with Ar to 50kPa, and cast a cylindrical ingot of Cu-Fe composite material with a diameter of 10mm and a length of 100mm; the obtained ingot is drawn at room temperature, and when the deformation n When n When ≥5, the diameter reduction of the ingot is 15% for each drawing, and an intermediate heat treatment is performed every two times of drawing, that is, when n n ≤9, anneal at 370°C for 2h, when 9n When ≤12, anneal at 350°C for 2 hours until the deformation n When it reaches 9-12, the Cu-Fe composite material with large deformation is obtained; the Cu-Fe composite material with large deformation is immersed in 10% potassium dichromate solution for 24 hours; finally, after cleaning with alcohol After washing with deionized water, nan...
Embodiment 2
[0028] Put industrial pure iron with a purity of 99.995% and electrolytic copper with a purity of 99.99% in a vacuum induction furnace at a weight ratio of 1:20, and heat it to 1500°C under an atmospheric pressure of 0.3 Pa to melt it; Fill the induction furnace with Ar to 30kPa, and cast a cylindrical ingot of Cu-Fe composite material with a diameter of 20mm and a length of 150mm; the obtained ingot is drawn at room temperature, and when the deformation n When n When ≥5, the diameter reduction of the ingot is 12% for each drawing, and an intermediate heat treatment is performed every two times of drawing, that is, when n n ≤9, anneal at 350°C for 3h, when 9n When ≤12, anneal at 400°C for 3 hours until the deformation n When it reaches 9, the Cu-Fe composite material with large deformation is obtained; the Cu-Fe composite material with large deformation obtained is immersed in a potassium dichromate solution with a mass percentage of 5% and soaked for 28h; after cleaning with ...
Embodiment 3
[0030] Put industrial pure iron with a purity of 99.99% and electrolytic copper with a purity of 99.98% in a vacuum induction furnace at a weight ratio of 1:7, and heat it to 1300°C under 0.2 Pa atmospheric pressure to melt it; Fill the induction furnace with Ar to 40kPa, and cast a cylindrical ingot of Cu-Fe composite material with a diameter of 15mm and a length of 130mm; the obtained ingot is drawn at room temperature, and when the deformation n When n When ≥5, the diameter reduction of the ingot is 10% for each drawing, and an intermediate heat treatment is performed every two times of drawing, that is, when n n ≤9, anneal at 400°C for 4h, when 9n When ≤12, anneal at 380°C for 4 hours until the deformation n When it reaches 11, the Cu-Fe composite material with large deformation amount is obtained; the Cu-Fe composite material with large deformation amount is immersed in 8% potassium dichromate solution for 30 hours by mass percent; finally, it is cleaned with alcohol befo...
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