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Method for preparing high-silicon coating on silicon iron surface by adopting laser

A laser and coating technology, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of low infiltration efficiency of silicon infiltration, affecting the surface quality of materials, poor surface quality, etc., to reduce dilution and contamination, avoid dilution and contamination, and improve the effect of siliconizing efficiency

Inactive Publication Date: 2009-12-09
XINGKE MEDIUM & SMALL ENTERPRISES SERVICE CENT OF NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although 6.5% Si high-silicon steel has excellent electromagnetic properties, it is difficult to obtain it by traditional rolling methods due to its high brittleness.
The silicon source used in the siliconizing process is SiCl 4 , react with the Fe matrix to generate gaseous FeCl 2 , on the one hand, it causes the loss of Fe, and at the same time, it produces a cavitation effect, which affects the surface quality of the material
[0007]Other siliconizing methods, such as solid siliconizing method and liquid siliconizing method, can significantly improve the wear resistance, corrosion resistance and Oxidation resistance has been applied in the fields of machinery, chemical industry and aerospace, but the inherent shortcomings of these methods, such as low siliconizing efficiency and poor surface quality of the infiltrating layer, determine that it is not suitable for the preparation of thin and standardized high-silicon steel

Method used

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  • Method for preparing high-silicon coating on silicon iron surface by adopting laser
  • Method for preparing high-silicon coating on silicon iron surface by adopting laser
  • Method for preparing high-silicon coating on silicon iron surface by adopting laser

Examples

Experimental program
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Effect test

Embodiment 1

[0035] After the hot-rolled non-oriented low-silicon steel is ground and cleaned until the surface is clean, it is sandblasted to a surface roughness of Ra=5 μm to remove scale and impurities.

[0036] The pretreated hot-rolled non-oriented low-silicon steel is placed in the reactor, and the reactor is evacuated to a pressure of 10 -3 MPa, feed the mixed gas of argon and silane into the reactor, stop when the pressure in the reactor is 0.08MPa, wherein the volume percentage of silane in the mixed gas is 60%; import the laser, irradiate heat under the condition of laser defocus The surface of non-oriented low-silicon steel is rolled, the laser power is 1000W, the diameter of laser spot is 20mm, and the irradiation time is 30s, and a deposited coating is prepared on the surface of low-silicon steel.

[0037] After the deposited coating is prepared, place the hot-rolled non-oriented low-silicon steel in a vacuum of less than or equal to 10 -3 Under the condition of MPa, heat to 11...

Embodiment 2

[0040] After the hot-rolled non-oriented low-silicon steel is ground and cleaned until the surface is clean, it is sandblasted to a surface roughness of Ra=6 μm to remove scale and impurities.

[0041] The pretreated hot-rolled non-oriented low-silicon steel is placed in the reactor, and the reactor is evacuated to a pressure of 10 -3 MPa, feed the mixed gas of argon and silane into the reactor, and stop when the pressure in the reactor is 0.01MPa, wherein the volume percentage of silane in the mixed gas is 10%; On the surface of oriented low-silicon steel, the laser power is 400W, the laser defocus is 20mm, the scanning speed is 500mm / min, and the irradiation time is 5s. A deposited coating is prepared on the surface of low-silicon steel, and the thickness of the deposited coating is 40μm.

[0042] After the deposited coating is prepared, place the hot-rolled non-oriented low-silicon steel in a vacuum of less than or equal to 10 -3 Under the condition of MPa, heat to 700°C a...

Embodiment 3

[0045] After the hot-rolled non-oriented low-silicon steel is ground and cleaned until the surface is clean, it is sandblasted to a surface roughness of Ra=5.6 μm to remove scale and impurities.

[0046] The pretreated hot-rolled non-oriented low-silicon steel is placed in the reactor, and the reactor is evacuated to a pressure of 10 -3 MPa, feed argon and silane into the reactor, and control the reaction system pressure to 0.08MPa, wherein the volume flow of argon is 550mL / min, and the volume flow of silane is 3mL / min; The surface of the hot-rolled non-oriented low-silicon steel is irradiated with the laser power of 1000W, the diameter of the laser spot is 30mm, and the irradiation time is 30min, and a deposited coating is prepared on the surface of the low-silicon steel. The highest silicon content of the deposition coating is 10wt%, and the silicon content of the joint of the deposition coating and the substrate is 3wt%.

[0047] After the deposited coating is prepared, pl...

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Abstract

The invention discloses a method for preparing high-silicon coating on silicon iron surface by adopting laser, comprising the following steps: (1) cleaning and abrasive-blasting the surface of hot-rolling random orientation low silicon iron; (2) putting the low silicon iron in vacuum, and then irradiating the low silicon iron by laser in the mixture atmosphere of argon and silane to prepare a deposited coating; (3) putting the deposited coating in vacuum, heating to 70-1100 DEG C with the temperature being kept for 2-6 hours to prepare the high-silicon coating. The method of the invention improves ihrigizing efficiency and realizes quick ihrigizing; chloride-free silicon is adopted to prevent generation of FeCl2 to cause iron loss and improve the surface quality of the material; the method carries out local restriction on the ihrigizing process to reduce and prevent tail gas from diluting and polluting raw materials.

Description

technical field [0001] The invention relates to the preparation of a silicon steel surface coating, in particular to a method for preparing a high-silicon coating on the silicon steel surface by using a laser. Background technique [0002] Silicon steel is the most important functional material in all electrical equipment for power production and consumption, and the most used functional material in the world. It is also the most advanced technology used by metallurgical enterprises and the most difficult to produce. It is the "work of art" among all steel materials. , its output and quality are an important symbol of the strength of a country's metallurgical industry, and occupy a very important position in national economic and social development. [0003] However, during the use of silicon steel, it causes a huge waste of energy due to iron loss and other losses. Materials and metallurgical workers from all over the world have long been committed to the research of reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/48C23C16/24
Inventor 刘常升王恭凯张滨陈岁元梁京国玉军
Owner XINGKE MEDIUM & SMALL ENTERPRISES SERVICE CENT OF NORTHEASTERN UNIV