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Aluminum-manganese alloy layer hot-dip process

A hot-dip aluminum and alloy layer technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of low hardness and high wear loss weight of pure aluminum coating

Inactive Publication Date: 2013-08-28
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, pure aluminum coating is often used, and its hardness is generally 15.3HBS. With the prolongation of erosion wear and dynamic abrasive wear time, the wear loss weight of pure aluminum coating is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Pretreatment of plated parts. Clean the surface of the plated parts, remove surface oil, oxide layer and impurities. First polish with sandpaper, and then place the plated parts in a concentration of 20% NaOH, a concentration of 5% Na 2 SO 4 and a concentration of 10% Na 2 CO 3 In the mixed aqueous solution, the temperature is 100°C, and the time is 20 minutes, to remove the oil stain on the surface of the plated piece, and then wash with water to remove the residual alkali on the surface of the plated piece. Subsequently, the plated piece is placed in an aqueous solution of hydrochloric acid (33%), soaked for 30min and then rinsed to remove the rust on the surface of the plated piece, and wash away the residual hydrochloric acid on the surface of the plated piece with water;

[0027] (2) Assisted plating treatment. Put the plated parts after the aforementioned pretreatment into 10% ZnCl 2 In the aqueous solution of the fluxing agent, the fluxing temperature i...

Embodiment 2

[0031]The difference between this experimental method and the specific embodiment 1 is that step 3——in the process of melting the aluminum ingot, slowly add 18% Mn particles to the aluminum liquid, and the other steps and parameters are the same as the specific embodiment 1, so as to obtain hot-dipped Al -9% Mn alloy coating.

Embodiment 3

[0033] The difference between this experimental method and the specific embodiment 1 is that step 3——in the process of melting the aluminum ingot, slowly add 26% Mn particles to the aluminum liquid, and the other steps and parameters are the same as the specific embodiment 1, so as to obtain hot-dipped Al -13% Mn alloy plating.

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PUM

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Abstract

The invention discloses an aluminum-manganese alloy layer hot-drop process. The aluminum-manganese alloy layer hot-drop process comprises the following steps of: respectively forming Al-2%wtMn, Al-9%wtMn, Al-13%wtMn aluminum-manganese alloy coatings and an Al-Mn-Mg alloy coating on the surface of Q235 steel, wherein the surface of the pure aluminum coating is formed into a thick dendritic crystal structure, and block-shaped aluminum-manganese compound phases appear on the aluminum-manganese alloy coatings; the aluminum-manganese alloy coatings mainly consist of Al, FeAl3, Fe2Al5 and MnAl6. An HAD modified layer comprises two parts, wherein the outermost layer is an aluminum-manganese alloy layer; and a thick-tooth shaped iron-aluminum compound transition layer is arranged below the aluminum-manganese alloy layer. The manganese and the magnesium elements are added, so that surface hardness of the hot-dip aluminum layer is remarkably improved. The hardness of the Al-9%Mn and Al%-4Mn-4%Mg alloy coatings is respectively 26.7 HBS and 34.6 HBS. Compared with the 15.3 HBS hardness of the pure aluminum coating, the hard values are respectively increased by 75% and 126%. Compound addition strengthening effects of the manganese and magnesium within a certain range are better than the single element addition strengthening effect.

Description

technical field [0001] The invention belongs to the technical field of Q235 steel surface modification and surface strengthening, and relates to a method for hot-dipping an aluminum-manganese alloy layer. Background technique [0002] In the prior art, pure aluminum coating is often used, and its hardness is generally 15.3HBS. With the prolongation of erosion wear and dynamic abrasive wear time, the wear loss weight of pure aluminum coating is relatively high. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the prior art, and to provide a method for hot-dipping (HAD) Al-Mn alloy layer. The HAD Al-Mn alloy layer has excellent erosion resistance and abrasive wear resistance. Its technical solution is: [0004] A method for hot-dipping an aluminum-manganese alloy layer, the steps of which are: degreasing, water washing, rust removal, water washing, assisted plating, water washing, drying and ...

Claims

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Application Information

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IPC IPC(8): C23C2/02C23C2/12C22C21/00
Inventor 李新梅刘炳
Owner XINJIANG UNIVERSITY
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