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A protection method for high temperature corrosion resistance of ultrasonic horn

An ultrasonic horn, high temperature corrosion resistance technology, applied in anodizing, coating, metal material coating process and other directions, can solve the problems of shortening service life, falling off, melt pollution, etc., to improve corrosion resistance, prolong Service life, good connection effect

Active Publication Date: 2017-01-11
盐城市盐南高新区西伏河绿色低碳科创园发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When ultrasonic waves propagate in high-temperature melts, they can improve the structure of metals or alloys through the cavitation effect, refine grains, and improve the mechanical properties of materials. Under the joint action of chemical corrosion, high temperature wear and oxidation, corrosion holes of different sizes often appear. As the corrosion holes continue to increase and expand, the surface of the horn will peel and fall off, resulting in the contamination of the melt, and the The vibration frequency of the rod will shift, the emission efficiency will decrease, and the service life will be greatly shortened; it is of great significance to seek an effective protection method for the ultrasonic horn to resist high temperature corrosion
[0003] According to the applicant's search keyword "ultrasonic horn", it is found that most of the current patents are mostly concentrated in the field of ultrasonic applications, such as the patent with the publication number: CN101748300A, which puts the ultrasonic horn deep into the high-temperature melt for ultrasonic treatment; however, about Solve the problem that the ultrasonic horn is less likely to be corroded by high-temperature metal melt. After searching, it is found that the patent with the publication number of CN102935742A adopts the method of plasma spraying to protect the ultrasonic horn; Replace the stainless steel with a higher melting point and higher temperature-resistant material such as titanium alloy, or coat the horn tool head with a layer of high-temperature-resistant ceramic coating, or cover the tool head with high-temperature-resistant and corrosion-resistant materials; the above methods Both have improved the corrosion resistance of the horn to a certain extent, but there are still some other problems in practical applications, such as expensive materials, difficult processing, or easy to fall off protective materials, and low ultrasonic transmission efficiency; therefore , there is an urgent need for a suitable method that can effectively protect the horn from corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using 1Cr17 carbon steel as the body material of the ultrasonic horn, the specific operation process of the protection method of the present invention is as follows:

[0019] (1) Melt the aluminum block at 700°C into aluminum liquid, which contains 10% silicon; the alkaline electrolyte contains 10g / L sodium carbonate, 8g / L sodium silicate, and 2g / L sodium aluminate , 10g / L sodium phosphate and 0.5g / L sodium borate;

[0020] (2) Polish the ultrasonic horn and then go through alkali washing, degreasing, water washing, pickling and rust removal, water washing and aqueous solution flux treatment, and then dry;

[0021] (3) Immerse the processed ultrasonic horn in the prepared molten aluminum, and take it out for air cooling after 7 minutes. At this time, the surface of the steel part will be covered with an aluminum layer;

[0022] (4) Put the ultrasonic horn covered with aluminum layer into the micro-arc oxidation working tank filled with alkaline electrolyte, and perform...

Embodiment 2

[0025] With No. 30 carbon steel as the body material ultrasonic horn, the specific operation process of the protection method of the present invention is as follows:

[0026] (1) Melt the aluminum block at 750°C into aluminum liquid, which contains 6% silicon; the alkaline electrolyte contains 40g / L sodium carbonate, 40g / L sodium silicate, and 40g / L sodium aluminate , 40g / L of sodium phosphate and 10g / L of sodium borate;

[0027] (2) Polish the ultrasonic horn and then go through alkali washing, degreasing, water washing, pickling and rust removal, water washing and aqueous solution flux treatment, and then dry;

[0028] (3) Immerse the treated ultrasonic horn in the prepared molten aluminum, and put it out for air cooling after 10 minutes. At this time, the surface of the steel part will be covered with an aluminum layer;

[0029] (4) Put the ultrasonic horn covered with aluminum layer into the micro-arc oxidation working tank filled with alkaline electrolyte, and perform mi...

Embodiment 3

[0032] Using No. 45 carbon steel as the body material of the ultrasonic horn, the specific operation process of the protection method of the present invention is as follows:

[0033] (1) Melt the aluminum block at 800°C into aluminum liquid, which contains 10% silicon; the alkaline electrolyte contains 20g / L sodium carbonate, 20g / L sodium silicate, and 25g / L sodium aluminate , 10g / L of sodium phosphate and 15g / L of sodium borate;

[0034] (2) Polish the ultrasonic horn and then go through alkali washing, degreasing, water washing, pickling and rust removal, water washing and aqueous solution flux treatment, and then dry;

[0035] (3) Immerse the treated ultrasonic horn in the prepared molten aluminum, and put it out for air cooling after 10 minutes. At this time, the surface of the steel part will be covered with an aluminum layer;

[0036] (4) Put the ultrasonic horn covered with aluminum layer into the micro-arc oxidation working tank filled with alkaline electrolyte, and p...

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Abstract

The invention provides a protection method for high-temperature molten aluminum corrosion resistance of an ultrasonic amplitude transformer. The protection method specifically comprises the following steps: firstly carrying out hot dip aluminum plating on the ultrasonic amplitude transformer taking heat resistant steel as a main material, and then carrying out micro-arc oxidation to wrap a ceramic layer so as to protect the ultrasonic amplitude transformer. According to the protection method, by combining the hot dip aluminum plating and the micro-arc oxidation technology, a three-layer membrane structure with the ceramic layer, an aluminum layer and an iron-aluminum alloy layer is obtained on the surface of steel ultrasonic amplitude transformer, so that the corrosion resistance of the ultrasonic amplitude transformer in molten high-temperature aluminum and aluminum alloy is effectively improved, the service efficiency of an ultrasonic device is improved, and the service life of the ultrasonic device is prolonged.

Description

technical field [0001] The invention belongs to the field of metal material preparation, in particular to a method for protecting an ultrasonic horn from corrosion of high-temperature molten metal. Background technique [0002] When ultrasonic waves propagate in high-temperature melts, they can improve the structure of metals or alloys through the cavitation effect, refine grains, and improve the mechanical properties of materials. Under the joint action of chemical corrosion, high temperature wear and oxidation, corrosion holes of different sizes often appear. As the corrosion holes continue to increase and expand, the surface of the horn will peel and fall off, resulting in the contamination of the melt, and the The vibration frequency of the rod will shift, the emission efficiency will decrease, and the service life will be greatly shortened; it is of great significance to seek an effective protection method for the ultrasonic horn to resist high temperature corrosion. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/12C25D11/06
Inventor 李惠焦雷陈龙
Owner 盐城市盐南高新区西伏河绿色低碳科创园发展有限公司
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