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Fe-Ni soft magnetic alloy 1J79
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Introduction
1J79 has excellent magnetic properties. It is a commonly used iron-nickel alloy (soft magnetic alloy), can also be called a high permeability alloy. It is mainly through the reasonable combination of nickel and iron to achieve sufficient magnetic permeability and magnetic saturation induction. The addition of molybdenum, copper and other elements in 1J79 improves the resistivity of the material and reduces the eddy current loss after the core is made. At the same time, the added elements can also increase the hardness of the material, which is particularly beneficial for wear in applications such as magnetic heads. The production process of 1J79 alloy is complex. For example, the rolling process, annealing temperature, annealing time, cooling rate, etc. have a great influence on the final magnetic properties of the material. At present, the company has a mature production process. 1J79 products are commonly used in the iron core of medium and high frequency transformers or devices with strict requirements on sensitivity.
chemical composition
Brand Chemical composition (mass fraction)% 1J79 C P S Mn Si Ni Cr Co Mo Cu Fe ≤ 0.03 ≤ 0.02 ≤ 0.02 0.6-1.1 0.3-0.5 78.5-80 - - 3.8-4.1 ≤ 0.20 Allowance Mechanical properties
Resistivity μΩ · m Density g/cm³ Curie point ℃ saturation magnetostriction coefficient Brinell hardness HBS Tensile strength MPa Yield strength MPa Elongation% 0.55 8.6 450 2 cold hard state soft state cold hard state soft state cold hard state soft state cold hard state soft state 210 120 1030 560 980 150 3 50 average coefficient of expansion
Coefficient of linear expansion in the following temperature range/(x10-6/℃) 20-100 ℃ 20-200 ℃ 20-300 ℃ 20-400 ℃ 20-500 ℃ 20-600 ℃ 20-700 ℃ 20-800 ℃ 20-900 ℃ 10.3-10.8 10.9-11.2 11.4-12.9 11.9-12.5 12.3-13.2 12.7-13.4 13.4-13.6 13.4-13.6 13.2-13.7 Application areas
All kinds of transformers, transformers, magnetic amplifiers, chokes and magnetic shields with high initial magnetic conductivity and working in weak magnetic power.
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Fe-Ni soft magnetic alloy 1J79
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