A kind of bulk amorphous alloy nanometer crystal double-phase composite soft magnetic alloy
Technical field
The invention belongs to technical field of magnetic materials, particularly a kind of bulk amorphous alloy nanometer crystal double-phase composite soft magnetic alloy.
Background technology
For adapting to miniaturization, the high performance requirement of motor, press for and develop core material with high saturated magnetic induction.For special machines, require its magnetic circuit to have special spatial distribution, thereby core material to be block usually, and complex-shaped.Yet the amorphous and nanocrystalline soft magnetic alloy of practical application is at present normally obtained by fast melt-quenching+amorphous crystallization process, and its shape and size are subjected to great restriction, only can provide shapes such as strip, powder, filament, can not satisfy the needs that engineering is used.
Summary of the invention
The object of the present invention is to provide and a kind ofly have high saturated magnetic induction and than the amorphous bulk nanometer crystal double-phase composite soft magnetic alloy of low production cost.
The bulk amorphous alloy nanometer crystal double-phase composite soft magnetic alloy that the present invention proposes is the Fe-Zr-Nb magnetically soft alloy, and its component proportioning by weight is as follows:
Fe:83.5-89%, Zr:3-7%, Nb:3-7%, B:3-9%, Cu:0.5-1%, X:1-5%, total amount satisfies 100%, and X is an intensified element, is one or more of Si, Al, V, Mo, W.
The preparation method of the amorphous bulk nanometer crystal double-phase composite soft magnetic alloy that the present invention proposes is as follows: smelting nut alloy in the induction furnace frequently at first in a vacuum, get rid of band mechanism amorphous ribbon fully with single roller chilling again; With ball mill to the amorphous ribbon of gained under the Ar gas shiled, carry out-a 100-0 ℃ low temperature ball milling prepares amorphous powder; In amorphous powder is crossed the cold-zone temperature range, carry out the high pressure Fast Sintering under the 3.5-5.5Gpa sintering pressure, prepare the bulk amorphous alloy nanometer crystal double-phase composite soft magnetic alloy at last.
In the said method, when freezing the refining foundry alloy, utilize vacuum medium frequency induction furnace to smelt Fe, Zr, Nb ingot earlier, be melted to 1000 ℃ ± 100 ℃, add all the other elements (as B, Si, Al, Cu etc.) again, cast makes master alloy ingot.Getting rid of band mechanism with single roller chilling and be equipped with amorphous ribbon, is behind fusion foundry alloy under the Ar Buchholz protection, is injected into amorphous ribbon, and pressure is 450-550Pa, copper roller linear velocity 40~70m/s, quartz nozzle width 30mm.Low temperature ball mill ball milling amorphous ribbon makes amorphous powder, and its temperature is-100 ℃~0 ℃, and rotating speed is 250~540r/min, and ratio of grinding media to material is 10~30, and the ball milling time is 10~30h.The high pressure Fast Sintering makes the bulk amorphous alloy nanometer crystal double-phase composite soft magnetic alloy, and its sintering temperature is 350 ℃~550 ℃, and sintering pressure is 3.5~5.5GPa, and sintering time is 3~10min, dwell time 3min.Also to heat-treat Ar gas shiled, 250 ℃~400 ℃ of temperature, time 0.5~1h as last.
Novel block Fe-Zr-Nb of the present invention is that amorphous nanometer crystal double-phase composite soft magnetic alloy has been broken through the restriction of original nano-crystal soft magnetic alloy on size and dimension, has high saturation induction density, can be used for the national defence and the product for civilian use, as: motor core, distribution transformer, high power switching power supply, pulse transformer, magnetic amplifier, intermediate frequency transformer and inverter iron core or the like.Preparation technology of the present invention has simply, cost is low, be easy to realize characteristics such as industrialization, has wide research and market application foreground.
Embodiment
The invention is further illustrated by the following examples.
Embodiment 1: the compound Fe of the nanocrystalline two-phase of amorphous bulk
86.5Zr
4Nb
3B
3Si
2Al
1Cu
0.5Magnetically soft alloy.The preparation technology of bulk alloy as previously mentioned.During vacuum metling, vacuum degree is 6 * 10
-3Pa, in the amorphous ribbon preparation, protective gas is Ar, and copper roller linear velocity is 50m/s, and the amorphous thin ribbon that obtains is thick to be 14 microns, wide 20 millimeters.With planetary low temperature ball mill amorphous ribbon is broken into the about 14 microns amorphous powder of particle diameter, the ball milling temperature is-20 ℃, and rotating speed is 400r/min, and ratio of grinding media to material is 10, ball milling time 15h.The high-pressure sinter temperature is 450 ℃, sintering pressure 5.5GPa, sintering time 3min.The nanocrystalline two-phase composite alloy of bulk amorphous alloy that obtains is of a size of that Φ 25 * 10mm, relative density are 98.9%, average nanocrystalline grain size is 15.7nm, and saturation magnetization Ms is 1.60T.
Embodiment 2: the compound Fe of the nanocrystalline two-phase of amorphous bulk
84Zr
3Nb
3Mo
1B
8Cu
1Magnetically soft alloy.The preparation of bulk alloy as previously mentioned.During vacuum metling, vacuum degree is 6 * 10
-3Pa, in the amorphous ribbon preparation, protective gas is Ar, and copper roller linear velocity is 40m/s, and the amorphous thin ribbon that obtains is thick to be 15 microns, wide 20 millimeters.With planetary low temperature ball mill amorphous ribbon is broken into the about 15 microns amorphous powder of particle diameter, the ball milling temperature is-40 ℃, and rotating speed is 450r/min, and ratio of grinding media to material is 15, ball milling time 10h.The high-pressure sinter temperature is 480 ℃, sintering pressure 5.5GPa, sintering time 3min.The nanocrystalline two-phase composite alloy of bulk amorphous alloy that obtains is of a size of that Φ 25 * 10mm, relative density are 98.7%, average nanocrystalline grain size is 15.3nm, and saturation magnetization Ms is 1.49T.
Embodiment 3: the compound Fe of the nanocrystalline two-phase of amorphous bulk
83.5Zr
3Nb
3.5V
0.9W
0.5B
7.6Cu
1Magnetically soft alloy.The preparation of bulk alloy as previously mentioned.During vacuum metling, vacuum degree is 6 * 10
-3Pa, in the amorphous ribbon preparation, protective gas is Ar, and copper roller linear velocity is 60m/s, and the amorphous thin ribbon that obtains is thick to be 13 microns, wide 20 millimeters.With planetary low temperature ball mill amorphous ribbon is broken into the about 13 microns amorphous powder of particle diameter, the ball milling temperature is-0 ℃, and rotating speed is 300r/min, and ratio of grinding media to material is 20, ball milling time 20h.The high-pressure sinter temperature is 430 ℃, sintering pressure 5.5GPa, sintering time 3min.The nanocrystalline two-phase composite alloy of bulk amorphous alloy that obtains is of a size of that Φ 25 * 10mm, relative density are 98.9%, average nanocrystalline grain size is 16.5nm, and saturation magnetization Ms is 1.43T.
In the foregoing description, the index number of element is the weight percent content of this element.