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Heat treatment process of stator core for air conditioner

A stator core and process technology, applied in the field of heat treatment, can solve the problems of unsatisfactory heat treatment effect, poor internal stress relief effect, inability to recover well and improve the magnetic properties of the stator core, so as to improve the effect of stress relief, Excellent anti-rust and anti-corrosion properties, improved compactness and stability

Active Publication Date: 2019-06-04
宁国井田机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing heat treatment process for the stator core has poor internal stress relief effect and unsatisfactory heat treatment effect, which cannot restore and improve the magnetic properties of the stator core.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of air-conditioning stator core heat treatment process that the present invention proposes comprises the following steps:

[0022] (1) Burning oil: Put the stator core in a heating furnace, raise the temperature from room temperature to 450°C under the condition of nitrogen gas, and keep it warm for 120 minutes to remove the stamping oil on its surface;

[0023] (2) Annealing: Put the deoiled stator core in the annealing furnace, raise the temperature to 720°C at an average heating rate of 8°C / min, keep it warm for 90min, feed a mixture of nitrogen and hydrogen, and then The average heating rate of 1°C / min is raised to 760°C, and the temperature is kept for 210min;

[0024] (3) Slow cooling: the stator core in the annealing furnace is taken out of the furnace, air-cooled first, and then air-cooled to 320°C;

[0025] (4) Bluing: Place the slowly cooled stator core in a heating furnace, pass saturated water vapor into it for bluing treatment, cool with the furnace...

Embodiment 2

[0027] A kind of air-conditioning stator core heat treatment process that the present invention proposes comprises the following steps:

[0028] (1) Burning oil: Put the stator core in a heating furnace, raise the temperature from room temperature to 455°C under the condition of nitrogen gas, and keep it warm for 120 minutes to remove the stamping oil on its surface;

[0029] (2) Annealing: Place the deoiled stator core in an annealing furnace, raise the temperature to 725°C at an average heating rate of 8.5°C / min, keep it warm for 90min, and feed a mixture of nitrogen and hydrogen at a flow rate of 88m 3 / h, the volume ratio of nitrogen and hydrogen is 2:1, and then the temperature is raised to 755°C at an average heating rate of 1°C / min, and the temperature is kept for 210min;

[0030] (3) Slow cooling: take the stator core out of the annealing furnace, first air cool to 580°C, and then air cool to 330°C;

[0031] (4) Bluing: Place the cooled stator core in a heating furna...

Embodiment 3

[0033] A kind of air-conditioning stator core heat treatment process that the present invention proposes comprises the following steps:

[0034] (1) Burning oil: Put the stator core in a heating furnace, raise the temperature to 460°C under the condition of nitrogen gas, and keep it warm for 120 minutes to remove the stamping oil on its surface;

[0035] (2) Annealing: Place the deoiled stator core in an annealing furnace, raise the temperature to 730°C at an average heating rate of 9°C / min, keep it warm for 90min, and inject a mixture of nitrogen and hydrogen at a flow rate of 95m 3 / h, the volume ratio of nitrogen and hydrogen is 3:1, then the temperature is raised to 760°C at an average heating rate of 1.5°C / min, and the temperature is kept for 210min;

[0036] (3) Slow cooling: take the stator core out of the annealing furnace, first air cool to 590°C, and then air cool to 340°C;

[0037] (4) Bluing: Place the slowly cooled stator core in a heating furnace, and pass satu...

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PUM

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Abstract

The invention discloses a heat treatment process of a stator iron core for an air conditioner, and relates to the technical field of heat treatment. The heat treatment process comprises the followingsteps of oil firing, annealing, slow cooling and blueing. According to the heat treatment process, the stator iron core is subjected to heat treatment, the surface stress of the stator iron core can be eliminated well, the stability and compactness of a material can be improved, the strength of the material can be improved, the magnetic performance can be restored and improved, and excellent rustprotection and corrosion resistance performance can be obtained.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a heat treatment process for a stator core for an air conditioner. Background technique [0002] The stator core is an important part that constitutes the motor magnetic flux circuit and fixes the stator coil. Its function is mainly to generate an exciting magnetic field and exert a force on the current-carrying conductor in it. Stator cores are generally made of silicon steel sheets. Silicon steel is a kind of steel composed of silicon (silicon is also called silicon), and its silicon content is 0.8-4.8%. It has the characteristics of high magnetic permeability, small residual magnetism and coercive force, easy magnetization, demagnetization and low hysteresis loss. , so it is widely used in the manufacture of motors and various transformer cores. [0003] The stator core generally requires heat treatment during processing to remove machining and punching shear stress a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26C21D1/74C21D9/00C23C8/18
CPCC21D1/26C21D1/74C21D9/0068C23C8/18
Inventor 倪盛
Owner 宁国井田机电有限公司
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