Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy, so as to overcome the problems in the background art.
In order to achieve the above object, the technical scheme of the present invention is realized by the following technical scheme:
the heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying a compressive stress of 1-3MPa on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions;
(2) Vacuumizing the heat treatment furnace, and introducing protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 480-520 ℃ for 50-60min for the first time, heating to 540-580 ℃ for the second time, continuing to heat for 20-40min, and rapidly cooling to 460-480 ℃ after heat preservation is finished;
(4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field intensity to be 800-1600 gauss, and preserving heat for 30-60min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
Preferably, the composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
Preferably, in the step (1), the bidirectional winding is to wind the wire in one direction and then wind the wire in the opposite direction.
Preferably, in step (1), the applied compressive stress is 1MPa.
Preferably, the protective gas is high-purity nitrogen with the concentration of 99.99 percent, and the gas flow is controlled to be 1-5mL/s.
Preferably, in the step (3), the temperature is raised to 500 ℃ for 60min for the first time, and the temperature is raised to 560 ℃ for the second time and the temperature is kept for 30min.
Preferably, the first heating rate and the second heating rate are both 10 ℃/min.
Preferably, in the step (4), the magnetic field strength is controlled to be 800 gauss, and the temperature is kept for 60min.
The invention provides a heat treatment method of a high-performance iron-based amorphous nanocrystalline alloy, which has the advantages compared with the prior art that:
according to the invention, through bidirectional winding of the electric furnace wire on the corundum tube, currents in two directions are in opposite flow after the energization, so that magnetic fields exactly cancel each other, and surrounding magnetic fields are zero, so that the influence of the electric furnace wire magnetic field on a product during magnetic field heat treatment is avoided, the quality of the magnetic field heat treatment is ensured, and the quality of the iron-based amorphous nanocrystalline alloy is ensured;
according to the invention, certain compressive stress is applied, then the temperature is raised twice and kept for a period of time, and then the magnetic field intensity is controlled to be 800 gauss, so that the saturation magnetic induction intensity of the alloy is improved, the toughness and plasticity are improved through the action of the compressive stress, the coercive force of the iron-based amorphous nanocrystalline alloy is further reduced through the action of the magnetic field, and the quality of the iron-based amorphous nanocrystalline alloy is improved;
iron-based amorphous nanocrystalline alloy (Fe in the present invention 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 ) The residual magnetic induction of (2) reaches 0.10T, and the coercive force reaches 0.42A·m -1 The dynamic hysteresis loss reaches 8.3 W.kg -1 Has better performance.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 1mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 480 ℃ for 50min for the first time, heating to 540 ℃ for the second time, continuing to heat for 20min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 800 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
Example 2
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, applying 2MPa compressive stress on the iron-based amorphous alloy, and winding electric wires on corundum tubes in the hearth in a bidirectional manner; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 2mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for the first time and preserving heat for 55min, heating to 550 ℃ for the second time and preserving heat for 25min continuously, and rapidly cooling to 470 ℃ after the heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 900 gauss, and preserving heat for 40min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
Example 3
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 3mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 560 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 480 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 800 gauss, and preserving heat for 60min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
Example 4
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, applying 3MPa compressive stress on the iron-based amorphous alloy, and winding electric wires on corundum tubes in the hearth in a bidirectional manner; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 4mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 580 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Carrying out magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to be 1200 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
Example 5
The heat treatment method of the high-performance iron-based amorphous nanocrystalline alloy specifically comprises the following steps:
(1) Placing the iron-based amorphous alloy into a hearth of a heat treatment furnace, and applying 1MPa compressive stress on the iron-based amorphous alloy, wherein an electric furnace wire on a corundum tube in the hearth is wound in two directions; wherein, the bidirectional winding is to wind the electric furnace wire in one direction and then wind the wire reversely;
(2) Vacuumizing the heat treatment furnace, and introducing high-purity nitrogen with the flow rate of 2mL/s of 99.99% as protective gas;
(3) Heating the iron-based amorphous alloy in the hearth, heating to 500 ℃ for 60min for the first time, heating to 560 ℃ for the second time, continuing to heat for 30min, and rapidly cooling to 460 ℃ after heat preservation is finished; wherein, the first heating rate and the second heating rate are 10 ℃/min;
(4) Performing magnetic field heat treatment on the product in the step (3), controlling the magnetic field strength to 1600 gauss, and preserving heat for 30min;
(5) And cooling to room temperature along with the furnace to obtain the high-performance iron-based amorphous nanocrystalline alloy.
The composition of the iron-based amorphous alloy is Fe 85.7 Si 0.5 B 9.3 Cu 0.7 P 3.5 C 0.3 。
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.