阅读说明：本技术 一种压缩机铁芯热处理方法及压缩机铁芯 (Heat treatment method for compressor iron core and compressor iron core ) 是由 刘青松 裴英豪 施立法 夏雪兰 张振海 杜军 祁旋 于 2019-10-30 设计创作，主要内容包括：本发明提供一种应用于无取向硅钢应用技术技术领域的压缩机铁芯热处理方法,本发明还涉及一种压缩机铁芯,所述的压缩机铁芯热处理方法的热处理步骤为：1)对待处理压缩机铁芯原材除油；2)对待处理压缩机铁芯原材退火；3)对待处理压缩机铁芯原材缓冷；4)对待处理压缩机铁芯原材发蓝；5)对待处理压缩机铁芯原材冷却。本发明所述的压缩机铁芯热处理方法及压缩机铁芯,在将待处理压缩机铁芯原材通过热处理加工成压缩机铁芯时,能够有效使得铁芯冲裁断面形成致密的氧化膜,有效抑制铸铝条与铁芯材料之间的横向电流,在保证铁芯铁损下降的同时,使压缩机杂散损耗下降15％以上,提高压缩机效率。(The invention provides a heat treatment method of a compressor iron core applied to the technical field of non-oriented silicon steel application, and the invention also relates to a compressor iron core, wherein the heat treatment steps of the heat treatment method of the compressor iron core are as follows: 1) deoiling raw materials of an iron core of a compressor to be treated; 2) annealing the raw material of the compressor iron core to be treated; 3) slowly cooling the raw material of the iron core of the compressor to be treated; 4) blueing the raw material of the iron core of the compressor to be treated; 5) and cooling the raw material of the iron core of the compressor to be treated. According to the heat treatment method for the compressor iron core and the compressor iron core, when the compressor iron core raw material to be treated is processed into the compressor iron core through heat treatment, a compact oxide film can be effectively formed on the punched section of the iron core, the transverse current between the cast aluminum strip and the iron core material can be effectively inhibited, the iron loss of the iron core is ensured to be reduced, the stray loss of the compressor is reduced by more than 15%, and the efficiency of the compressor is improved.)

1. A heat treatment method for a compressor iron core is characterized in that: the heat treatment method of the compressor iron core comprises the following heat treatment steps: 1) deoiling raw materials of an iron core of a compressor to be treated; 2) annealing the raw material of the compressor iron core to be treated; 3) slowly cooling the raw material of the iron core of the compressor to be treated; 4) blueing the raw material of the iron core of the compressor to be treated; 5) and cooling the raw material of the iron core of the compressor to be treated.

2. The method for heat treating a compressor core as claimed in claim 1, wherein: when the raw material of the compressor iron core to be treated is deoiled, the raw material of the compressor iron core to be treated is kept for 120min to 140min at the temperature of 380 ℃ to 480 ℃, and stamping oil on the surface of the raw material of the compressor iron core to be treated is removed.

3. The method for heat treating a compressor core as claimed in claim 1, wherein: when the compressor iron core raw material to be treated is annealed, the compressor iron core raw material to be treated is kept for 120min-180min within the range of 700 ℃ -780 ℃, so that grains which are plastically deformed at the edge of the compressor iron core raw material to be treated are recovered, recrystallized and blunted by burrs, and simultaneously, the grains in the compressor iron core raw material to be treated continue to grow up, and the iron loss is reduced.

4. The method for heat treating a compressor core as claimed in claim 1, wherein: and when the compressor iron core raw material to be treated is slowly cooled, cooling the compressor iron core raw material to be treated to 450-500 ℃ in a slow cooling area at the speed of 2-10 ℃/min.

5. The method for heat treating a compressor core as claimed in claim 1, wherein: when the raw material of the compressor iron core to be treated turns blue, the slowly cooled compressor iron core to be treated is kept for 100min-120min within the range of 480-520 ℃, so that a compact oxide film is formed on the surface of a silicon steel sheet in the compressor iron core to be treated, and the interlayer resistance is improved.

6. The method for heat treating a compressor core as claimed in claim 1, wherein: and when the raw material of the compressor iron core to be treated is cooled, cooling the blue compressor iron core to be treated to normal temperature.

7. The method for heat treating a compressor core as claimed in claim 1, wherein: protecting the raw material of the iron core of the compressor to be treated by adopting DX gas when the raw material of the iron core of the compressor to be treated is deoiled; and when the raw material of the compressor iron core to be treated is annealed, protecting the raw material of the compressor iron core to be treated by adopting DX gas.

8. The method for heat treating a compressor core as claimed in claim 1, wherein: and when the raw material of the compressor core to be treated blues, protecting the raw material of the compressor core to be treated by adopting DX gas and saturated steam.

9. The method for heat treating a compressor core as claimed in claim 1, wherein: DX gas is natural gas which is taken as a raw material and is subjected to incomplete combustion with air at high temperature to decompose and produce mixed gas containing N2, H2, CO and CO 2.

10. A compressor core, characterized by: the compressor iron core is made of silicon steel materials, and the silicon steel materials comprise the following components in parts by weight: si: 1.40% -1.7%; and Als: 0.30% -0.50%; mn: 0.20% -0.50%; p: 0.02% -0.10%; c: less than or equal to 0.005 percent; s: less than or equal to 0.01 percent; n: less than or equal to 0.01 percent; ti: less than or equal to 0.005 percent; the balance of Fe and impurity elements.

Technical Field

The invention belongs to the technical field of non-oriented silicon steel application, and particularly relates to a heat treatment method for a compressor iron core.

Background

The fixed-frequency compressor is a machine type with constant working condition and fixed rotating speed, the stator adopts a copper wire winding, the rotor is a squirrel-cage cast aluminum structure, and the fixed-frequency compressor is a main machine type in the current industrial refrigeration compressor due to simple structure, convenient maintenance and higher cost performance. The loss of the fixed-frequency compressor mainly comprises iron loss, copper loss, mechanical loss and stray loss, wherein the stray loss refers to the sum of various losses except the basic iron loss generated by magnetic flux at a magnetic conducting part of a stator in the iron loss measured during the no-load test of the compressor. For a fixed-frequency compressor with a rotor adopting a cast aluminum structure, transverse current between a cast aluminum strip and a silicon steel sheet is a main reason for generating stray loss. In order to improve the efficiency of the compressor, the loss of an iron core material is generally reduced, the iron core material for the current high-efficiency fixed-frequency compressor mainly adopts non-oriented electrical steel, and the iron loss P of silicon steel is P under the power frequency condition_1.5/50The compressor efficiency is below 85% at about 3.30W/kg. Existing siliconUnder the assembly condition of steel materials and compressors, the efficiency of the fixed-frequency compressor is very difficult to improve by reducing the loss of iron cores, and the overall performance is affected.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the compressor iron core heat treatment method is simple in step, when the compressor iron core raw material to be treated is processed into the compressor iron core through heat treatment, the iron core blanking section can be effectively enabled to form a compact oxide film, the transverse current between the cast aluminum strip and the iron core material is effectively inhibited, the iron core loss of the iron core is guaranteed to be reduced, the stray loss of the compressor is reduced by more than 15%, and the efficiency of the compressor is improved.

To solve the technical problems, the invention adopts the technical scheme that:

the invention relates to a heat treatment method of a compressor iron core, which comprises the following heat treatment steps: 1) deoiling raw materials of an iron core of a compressor to be treated; 2) annealing the raw material of the compressor iron core to be treated; 3) slowly cooling the raw material of the iron core of the compressor to be treated; 4) blueing the raw material of the iron core of the compressor to be treated; 5) and cooling the raw material of the iron core of the compressor to be treated.

When the raw material of the compressor iron core to be treated is deoiled, the raw material of the compressor iron core to be treated is kept for 120min to 140min at the temperature of 380 ℃ to 480 ℃, and stamping oil on the surface of the raw material of the compressor iron core to be treated is removed.

When the compressor iron core raw material to be treated is annealed, the compressor iron core raw material to be treated is kept for 120min-180min within the range of 700 ℃ -780 ℃, so that grains which are plastically deformed at the edge of the compressor iron core raw material to be treated are recovered, recrystallized and blunted by burrs, and simultaneously, the grains in the compressor iron core raw material to be treated continue to grow up, and the iron loss is reduced.

When the compressor iron core raw material to be treated is slowly cooled, the temperature of the compressor iron core raw material to be treated is cooled to 450-500 ℃ in a slow cooling area at the speed of 2-10 ℃/min. Avoid the stress concentration caused by the fast cooling speed and stabilize the iron loss performance.

When the raw material of the compressor iron core to be treated turns blue, the slowly cooled compressor iron core to be treated is kept for 100min-120min within the range of 480-520 ℃, so that a compact oxide film is formed on the surface of a silicon steel sheet in the compressor iron core to be treated, and the interlayer resistance is improved. The insulativity of the punched section of the iron core raw material of the compressor to be processed is improved, the transverse current between the aluminum bar and the silicon steel sheet is reduced, and the stray loss of the compressor is reduced.

And when the raw material of the compressor iron core to be treated is cooled, cooling the blue compressor iron core to be treated to normal temperature. The production efficiency is improved while the product performance is ensured.

Protecting the raw material of the iron core of the compressor to be treated by adopting DX gas when the raw material of the iron core of the compressor to be treated is deoiled; and when the raw material of the compressor iron core to be treated is annealed, protecting the raw material of the compressor iron core to be treated by adopting DX gas.

And when the raw material of the compressor core to be treated blues, protecting the raw material of the compressor core to be treated by adopting DX gas and saturated steam.

DX gas is a mixed gas containing N2, H2, CO and CO2, which is prepared by taking natural gas such as methane/propane and the like as a raw material and decomposing the natural gas and air under high temperature.

The invention also relates to a compressor iron core which can effectively enable the punched section of the iron core to form a compact oxide film, effectively inhibit the transverse current between the cast aluminum strip and the iron core material, ensure the iron core iron loss to be reduced, reduce the stray loss of the compressor by more than 15 percent and improve the efficiency of the compressor when the raw material of the compressor iron core to be treated is processed into the compressor iron core through heat treatment.

The compressor iron core is made of silicon steel materials, and the silicon steel materials comprise the following components in parts by weight: si: 1.40% -1.7%; and Als: 0.30% -0.50%; mn: 0.20% -0.50%; p: 0.02% -0.10%; c: less than or equal to 0.005 percent; s: less than or equal to 0.01 percent; n: less than or equal to 0.01 percent; ti: less than or equal to 0.005 percent; the balance of Fe and impurity elements.

By adopting the technical scheme of the invention, the following beneficial effects can be obtained:

according to the heat treatment method for the compressor iron core and the compressor iron core, provided by the invention, a layer of compact oxide film is formed on the punched section of the iron core, particularly the inner wall of a rotor cast aluminum hole, while the elimination of the punching stress at the edge part of the iron core material, the increase of the average grain size and the reduction of the iron loss of the iron core are ensured, so that the transverse current between a cast aluminum strip and the iron core material is effectively inhibited, the impurity dissipation loss is reduced, and the efficiency of the compressor is further improved. According to the heat treatment method for the compressor iron core and the compressor iron core, when the compressor iron core raw material to be treated is processed into the compressor iron core through heat treatment, a compact oxide film can be effectively formed on the punched section of the iron core, the transverse current between the cast aluminum strip and the iron core material can be effectively inhibited, the iron loss of the iron core is ensured to be reduced, the stray loss of the compressor is reduced by more than 15%, and the efficiency of the compressor is improved. The technical problem of the invention is effectively solved.

Detailed Description

The following description of the embodiments will explain the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations between the components, the functions and operation principles of the components, and the like, in further detail:

the invention relates to a heat treatment method of a compressor iron core, which comprises the following heat treatment steps: 1) deoiling raw materials of an iron core of a compressor to be treated; 2) annealing the raw material of the compressor iron core to be treated; 3) slowly cooling the raw material of the iron core of the compressor to be treated; 4) blueing the raw material of the iron core of the compressor to be treated; 5) and cooling the raw material of the iron core of the compressor to be treated. The compressor iron core obtained by the heat treatment method of the invention ensures that the blanking stress at the edge of the iron core material is eliminated, the average grain size is increased, and the iron core iron loss is reduced, and simultaneously, a layer of compact oxide film is formed on the blanking section of the iron core, particularly on the inner wall of the rotor cast aluminum hole, thereby effectively inhibiting the transverse current between the cast aluminum strip and the iron core material, reducing the impurity dissipation loss, and further improving the compressor efficiency. According to the heat treatment method for the compressor iron core and the compressor iron core, when the compressor iron core raw material to be treated is processed into the compressor iron core through heat treatment, a compact oxide film can be effectively formed on the punched section of the iron core, the transverse current between the cast aluminum strip and the iron core material can be effectively inhibited, the iron loss of the iron core is ensured to be reduced, the stray loss of the compressor is reduced by more than 15%, and the efficiency of the compressor is improved. Thus, the technical problem of the invention is effectively solved.

When the raw material of the compressor iron core to be treated is deoiled, the raw material of the compressor iron core to be treated is kept for 120min to 140min at the temperature of 380 ℃ to 480 ℃, and stamping oil on the surface of the raw material of the compressor iron core to be treated is removed. The temperature and the time can thoroughly remove the stamping oil on the surface of the stator and rotor iron core.

When the compressor iron core raw material to be treated is annealed, the compressor iron core raw material to be treated is kept for 120min-180min within the range of 700 ℃ -780 ℃, so that grains which are plastically deformed at the edge of the compressor iron core raw material to be treated are recovered, recrystallized and blunted by burrs, and simultaneously, the grains in the compressor iron core raw material to be treated continue to grow up, and the iron loss is reduced.

When the compressor iron core raw material to be treated is slowly cooled, the temperature of the compressor iron core raw material to be treated is cooled to 450-500 ℃ in a slow cooling area at the speed of 2-10 ℃/min. Thus, stress concentration caused by a high cooling speed is avoided, and the iron loss performance is stabilized.

When the raw material of the compressor iron core to be treated turns blue, the slowly cooled compressor iron core to be treated is kept for 100min-120min within the range of 480-520 ℃, so that a compact oxide film is formed on the surface of a silicon steel sheet in the compressor iron core to be treated, and the interlayer resistance is improved. The temperature and the realization can improve the insulativity of the punched section of the raw material of the compressor iron core to be processed, reduce the transverse current between the aluminum strip and the silicon steel sheet, reduce the stray loss of the compressor and effectively solve the technical problem of the invention.

And when the raw material of the compressor iron core to be treated is cooled, cooling the blue compressor iron core to be treated to normal temperature. Therefore, the production efficiency is improved while the product performance is ensured.

Protecting the raw material of the iron core of the compressor to be treated by adopting DX gas when the raw material of the iron core of the compressor to be treated is deoiled; and when the raw material of the compressor iron core to be treated is annealed, protecting the raw material of the compressor iron core to be treated by adopting DX gas. Therefore, the raw material of the compressor iron core to be processed in the processing process is prevented from being influenced by the external adverse environment, and the technical effect of the processing step can be effectively realized.

And when the raw material of the compressor core to be treated blues, protecting the raw material of the compressor core to be treated by adopting DX gas and saturated steam. Therefore, the raw material of the compressor iron core to be processed in the processing process is prevented from being influenced by the external adverse environment, and the technical effect of the processing step can be effectively realized.

DX gas is a mixed gas containing N2, H2, CO and CO2, which is prepared by taking natural gas such as methane/propane and the like as a raw material and decomposing the natural gas and air under high temperature.

The invention also relates to a compressor iron core which is made of the silicon steel material, and the silicon steel material comprises the following components in parts by weight: si: 1.40% -1.7%; and Als: 0.30% -0.50%; mn: 0.20% -0.50%; p: 0.02% -0.10%; c: less than or equal to 0.005 percent; s: less than or equal to 0.01 percent; n: less than or equal to 0.01 percent; ti: less than or equal to 0.005 percent; the balance of Fe and impurity elements.

The compressor is a fixed-frequency compressor.

The invention relates to a heat treatment method of a compressor iron core, and the embodiment 1 comprises the following steps:

the method specifically comprises the following steps:

1) the non-oriented silicon steel material used for the compressor iron core comprises the following chemical components in percentage by weight: si: 1.56 percent; and Als: 0.48 percent; mn: 0.36 percent; p: 0.05 percent; c + S + N + Ti: 82ppm, wherein the content of each element is less than or equal to 25ppm, and the balance is Fe and inevitable impurity elements;

2) placing the punched and stacked raw materials (stator and rotor cores) of the compressor core to be treated into a tunnel type heat treatment furnace, and preserving heat for 138min at the temperature of 400 ℃ to thoroughly remove the punching oil on the surface of the stator and rotor cores;

3) annealing the deoiled compressor iron core raw material to be treated at 760 ℃ for 170min, and protecting the compressor iron core raw material in a furnace by adopting DX gas;

4) slowly cooling the annealed iron core to 490 ℃ within 135 min;

5) carrying out bluing treatment on the cooled iron core at 490 ℃ for 110min, and protecting the iron core in a furnace by adopting DX gas and saturated steam;

6) cooling the iron core after bluing to room temperature in air;

7) and after the iron core is subjected to heat treatment, the stator winding rotor is cast with aluminum, and finally the compressor is assembled for performance test.

The iron core and the stator core after the heat treatment have the iron loss P_1.5/501.82W/kg, compressor stray loss 87W, compressor efficiency 84.9%.

The invention relates to a heat treatment method of a compressor iron core, and an embodiment 2 comprises the following steps:

the method specifically comprises the following steps:

1) the non-oriented silicon steel material used for the compressor iron core comprises the following chemical components in percentage by weight: si: 1.61 percent; and Als: 0.38 percent; mn: 0.35 percent; p: 0.05 percent; c + S + N + Ti: 78ppm, wherein the content of each element is less than or equal to 25ppm, and the balance is Fe and inevitable impurity elements;

2) putting the punched and stacked stator and rotor iron cores into a tunnel type heat treatment furnace, and preserving heat for 140min at the temperature of 380 ℃ to thoroughly remove the punching oil on the surfaces of the stator and rotor iron cores;

3) annealing the deoiled iron core at 750 ℃ for 180min, and protecting the iron core in a furnace by adopting DX gas;

4) slowly cooling the annealed iron core to 500 ℃ after 140 min;

5) carrying out bluing treatment on the cooled iron core at 500 ℃ for 90min, and protecting the iron core in a furnace by adopting DX gas and saturated steam;

6) cooling the iron core after bluing to room temperature in air;

7) and after the iron core is subjected to heat treatment, the stator winding rotor is cast with aluminum, and finally the compressor is assembled for performance test.

The iron core and the stator core after the heat treatment have the iron loss P_1.5/501.79W/kg, compressor stray loss 91W, compressor efficiency 85.1%.

The invention relates to a heat treatment method of a compressor iron core, and an embodiment 3 comprises the following steps:

the method specifically comprises the following steps:

1) the non-oriented silicon steel material used for the compressor iron core comprises the following chemical components in percentage by weight: si: 1.63 percent; and Als: 0.45 percent; mn: 0.30 percent; p: 0.03 percent; c + S + N + Ti: 75ppm, wherein the content of each element is less than or equal to 25ppm, and the balance is Fe and inevitable impurity elements;

2) putting the punched and stacked stator and rotor iron cores into a tunnel type heat treatment furnace, and preserving heat for 139min at the temperature of 420 ℃ to thoroughly remove the punching oil on the surfaces of the stator and rotor iron cores;

3) annealing the deoiled iron core at 780 ℃ for 185min, and protecting the iron core in a furnace by adopting DX gas;

4) slowly cooling the annealed iron core to 500 ℃ in 145 min;

5) carrying out bluing treatment on the cooled iron core at 500 ℃ for 100min, and protecting the iron core in a furnace by adopting DX gas and saturated steam;

6) cooling the iron core after bluing to room temperature in air;

7) and after the iron core is subjected to heat treatment, the stator winding rotor is cast with aluminum, and finally the compressor is assembled for performance test.

The iron core and the stator core after the heat treatment have the iron loss P_1.5/501.72W/kg, compressor stray loss 89W, compressor efficiency 85.3%.

Comparative example 1:

1) the non-oriented silicon steel material used for the compressor iron core comprises the following chemical components in percentage by weight: si: 1.56 percent; and Als: 0.48 percent; mn: 0.36 percent; p: 0.05 percent; c + S + N + Ti: 82ppm, wherein the content of each element is less than or equal to 25ppm, and the balance is Fe and inevitable impurity elements;

2) putting the punched and stacked stator and rotor iron cores into a tunnel type heat treatment furnace, and preserving heat for 138min at the temperature of 400 ℃ to thoroughly remove the punching oil on the surfaces of the stator and rotor iron cores;

3) annealing the deoiled iron core at 760 ℃ for 175min, and protecting the iron core in a furnace by adopting DX gas;

4) slowly cooling the annealed iron core to 490 ℃ within 135 min;

5) carrying out bluing treatment on the cooled iron core at 490 ℃ for 40min, and protecting the iron core in a furnace by adopting DX gas and saturated steam;

6) cooling the iron core after bluing to room temperature in air;

7) and after the iron core is subjected to heat treatment, the stator winding rotor is cast with aluminum, and finally the compressor is assembled for performance test.

The iron core after the heat treatment of the comparative example is obviously increased in stray loss of the compressor through testing, the efficiency of the compressor is slightly reduced, and the iron loss P of the stator iron core_1.5/501.79W/kg, compressor stray loss 119W, compressor efficiency 84.4%. Therefore, the method of the present invention can effectively solve the technical problems.

According to the heat treatment method for the compressor iron core and the compressor iron core, provided by the invention, a layer of compact oxide film is formed on the punched section of the iron core, particularly the inner wall of a rotor cast aluminum hole, while the elimination of the punching stress at the edge part of the iron core material, the increase of the average grain size and the reduction of the iron loss of the iron core are ensured, so that the transverse current between a cast aluminum strip and the iron core material is effectively inhibited, the impurity dissipation loss is reduced, and the efficiency of the compressor is further improved. According to the heat treatment method for the compressor iron core and the compressor iron core, when the compressor iron core raw material to be treated is processed into the compressor iron core through heat treatment, a compact oxide film can be effectively formed on the punched section of the iron core, the transverse current between the cast aluminum strip and the iron core material can be effectively inhibited, the iron loss of the iron core is ensured to be reduced, the stray loss of the compressor is reduced by more than 15%, and the efficiency of the compressor is improved. The technical problem of the invention is effectively solved.

The invention is described above by way of example, and it is obvious that the specific implementation of the invention is not limited by the above-described manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other occasions without modification.