A soft magnetic alloy magnetic powder for electromagnetic transmission devices

A soft magnetic alloy and electromagnetic transmission technology, applied in the direction of electrical components, circuits, magnetic objects, etc., can solve the problems of no wear resistance characteristics, decreased proportion of ferromagnetic elements, and decreased saturation magnetic induction intensity, etc., to achieve compensation Reduced magnetic transmission, improved friction performance, and low excitation current

Active Publication Date: 2020-04-24
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the disclosed embodiment of the patent, the proportion of magnetic powder ingredients is Cr2%, Nb0.01%, Si0.01%, Fe97.98%, and the added elements Si, Cr, and Nb are all non-ferromagnetic elements, and the ferromagnetic elements in the alloy magnetic powder after addition The proportion decreases, the saturation magnetic induction intensity decreases, and it does not reflect the characteristics of wear resistance
[0014] Comprehensive market circulation of magnetic powder for electromagnetic transmission and the above-mentioned magnetic powder authorized patents, open patent applications, currently iron-cobalt magnetic powder (Fe 50 co 50 ), iron-cobalt-nickel magnetic powder (Fe 68 co 23 Ni 9 ) is still the magnetic powder with the best magnetic properties (high saturation magnetic induction, high magnetic permeability, and low remanence), but both of these two magnetic powders have the problems of low hardness, low wear resistance, and short service life.
Due to the wear of magnetic powder, the output stability decreases, the slip exceeds the standard, and the life of electromagnetic devices is shortened
It is expected that by designing a new soft magnetic alloy composition, while stabilizing the high magnetic properties of the magnetic powder, the hardness and friction (friction coefficient) of the magnetic powder can be improved, the wear rate of the magnetic powder can be reduced, and the particle size distribution and spherical shape of the magnetic powder can be maintained for a long time. High degree, improve the air gap filling rate of magnetic powder, achieve high transmission force and prolong service life, but there are no reports of soft magnetic materials with these comprehensive properties in the prior art

Method used

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  • A soft magnetic alloy magnetic powder for electromagnetic transmission devices
  • A soft magnetic alloy magnetic powder for electromagnetic transmission devices
  • A soft magnetic alloy magnetic powder for electromagnetic transmission devices

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Use electrical pure iron, electrolytic cobalt, electrolytic nickel, electrolytic copper, high-purity metal chromium, pure silicon or high-purity ferrosilicon alloy (calculation of ingredients needs to deduct iron content) as raw materials, according to Fe65.21%, Co23%, Ni9.5% , Cu0.4%, Cr1.0%, Si0.8% by weight for batching, control the total amount of other metal elements Al, Mg, Ca, Ti, Ta, etc. in the raw materials to be less than 0.09%, and the total amount of V and Mn to be less than 0.11%, smelting under vacuum, keep the vacuum for 15 minutes for degassing after the molten steel is melted, then fill with nitrogen, and use nitrogen for gas atomization powder making, the oxygen content in the final alloy magnetic powder is ≤480ppm, and the carbon content is ≤52ppm . figure 1 It is the shape of magnetic powder particles with a particle size range of -200+250, which is a complete spherical particle. figure 2 It is the friction coefficient of the magnetic powder alloy...

Embodiment 2

[0054] Using electrical pure iron, electrolytic cobalt, electrolytic nickel, electrolytic copper, high-purity metal chromium, pure silicon or high-purity ferrosilicon alloy (calculation of ingredients needs to deduct iron content) as raw materials, according to Fe67.43%, Co21.5%, Ni8. 7%, Cu0.3%, Cr0.75%, Si1.2% by weight for batching, control the total amount of Al, Mg, Ca, Ti, Ta, V, Mn in the raw materials to be less than 0.2%, under vacuum Carry out smelting, keep the vacuum for 15 minutes for degassing after the molten steel is melted, then fill it with nitrogen, and use nitrogen for gas atomization to make powder, the oxygen content in the final alloy magnetic powder is ≤520ppm, and the carbon content is ≤48ppm. image 3 is the coefficient of friction of the magnetic powder alloy of Example 2 (the average value is 0.8). Tables 1 to 8 are the properties of the magnetic powders of the examples, wherein the wear rate (0.01871%), hardness (HRC 30), bulk density (4.5g / cm3), f...

Embodiment 3

[0056] Use electrical pure iron, electrolytic cobalt, electrolytic nickel, electrolytic copper, high-purity metal chromium, pure silicon or high-purity ferrosilicon alloy (calculation of ingredients needs to deduct iron content) as raw materials, according to Fe67.7%, Co21%, Ni8.2% , Cu0.25%, Cr1.7%, Si1.0% by weight percentage for batching, control the total amount of other metal elements Al, Mg, Ca, Ti, Ta in the raw material to be less than 0.05%, V0.05%, Mn0. 1%, smelting under vacuum, keep the vacuum for 15 minutes for degassing after the molten steel is melted, then fill it with argon, and use argon for gas atomization to make powder, the oxygen content in the final alloy magnetic powder is ≤300ppm, and the carbon content ≤50ppm. Figure 4 is the coefficient of friction of the magnetic powder alloy of Example 3 (the average value is 1.5).

[0057] Table 1 is the performance of the magnetic powder of the examples, wherein the wear rate (0.01411%), hardness (HRC34), bulk ...

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Abstract

The invention relates to the technical field of soft magnetism alloy magnetic powder, in particular to a soft magnetism alloy powder used for a electromagnetic transmission component. The chemical component of the soft magnetism alloy magnetic powder comprises, by mass percentage, Fe(100-Q-R-T-W-X-Y-Z)CoQNiRCuTCrUSiXMYM'Z, M and M' are trace other metal or non-metal elements, wherein M is one or more of metal elements except Fe, Co, Ni, Cu and Cr, M' is one or more of non-metal elements of C, O, N, P, S, B, Q=19-23, R=8-10, T=0.1-0.4, U=0.5-1.9, X=0.1-1.2, Y<=0.2, Z<=0.2, and the balance of Fe. The magnetic powder has ordered / disordered phase-change characteristics, and the phase change temperature range is 530-560 DEG C. The magnetic powder has the advantages that the magnetic induction is high, the magnetic conductivity is high, the coercive force is low and residual magnetism is low, the magnetization intensity and the magnetic force are high under an excitation state, the magneticpowder does not aggregate and the fluidity is good under a demagnetization state. The hardness is high, the friction force is high, and the wear resistant performance is good.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloy magnetic powder, in particular to a soft magnetic alloy magnetic powder used for electromagnetic transmission devices. Background technique [0002] Magnetic powder clutches, magnetic powder brakes, magnetic powder tension controllers, magnetic powder correction controllers and other magnetic powder electromagnetic transmission devices transmit the movement, power or torque of the active part to the driven parts through magnetized soft magnetic powder. Soft magnetic powder is the magnetic medium electromagnetic transmission The key powder material in. Magnetic powder electromagnetic transmission device is an automatic control element with superior performance, which has high linearity and high precision torque control. In the starting, running and braking states, the operation is stable, without vibration, impact and noise; in the case of torque overload, the automatic slip operation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147
CPCH01F1/14708
Inventor 张洪平刘永庆赵栋梁祁焱徐立红郭世海王煜程超
Owner CENT IRON & STEEL RES INST
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