CN105220200A

CN105220200A - Add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution

Info

Publication number: CN105220200A
Application number: CN201410291907.8A
Authority: CN
Inventors: 鞠云
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-26
Filing date: 2014-06-26
Publication date: 2016-01-06

Abstract

In order to improve the performance of aluminum magnesium alloy, with the demand of satisfied industry, the invention discloses a kind of preparation method adding rare earth La raising aluminum magnesium alloy performance in the electrolytic solution, adopt and microarc oxidation equipment providedly prepare ceramic oxide rete on aluminum magnesium alloy surface, add rare-earth elements La preparing in ceramic oxide rete electrolytic solution used, described rare-earth elements La counts 0.3% ~ 0.5% with massfraction.

Description

Add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution

Technical field

The present invention relates to a kind of preparation method adding rare earth La raising aluminum magnesium alloy performance in the electrolytic solution, belong to aluminum magnesium alloy Performance Optimization technique field.

Background technology

Apply more widely along with the light-weighted trend of mechanical component makes high tough aluminium alloy have.In order to meet the demand constantly increased, researcher has carried out a large amount of scientific researches to high-toughness casting aluminum alloy, also achieves a lot of achievements.But how improve the performance of existing cast aluminium alloy further and develop novel alloy series to meet various needs, remaining an important problem.The current potential of aluminium depends on the insulating property of ceramic film to a certain extent, improves the compactness of its surface oxidation ceramic film, increases the raising that the thickness of rete all contributes to corrosion resistance.The corrosion speed of aluminium alloy is more faster than fine aluminium in general.

Differential arc oxidization technique highlights in numerous process for treating surface, from introduction research till now, although have many achievements and conclusion, is also in conceptual phase, non-large scale investment industrial production.

Aluminum alloy differential arc oxidation technology concentrates on YL12 both at home and abroad mostly, and cast aluminium alloy mainly concentrates on Al – Si system alloy, as the Xue Wenbin etc. of Beijing Normal University low energy physics Institute, less to the research of Al-Mg system alloy.

Summary of the invention

The technical problem to be solved in the present invention: provide a kind of and add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution, be intended to the performance improving aluminum magnesium alloy, with the demand of satisfied industry.

Technical scheme of the present invention:

Add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution, adopt and microarc oxidation equipment providedly prepare ceramic oxide rete on aluminum magnesium alloy surface, add rare-earth elements La preparing in ceramic oxide rete electrolytic solution used, described rare-earth elements La counts 0.3% ~ 0.5% with massfraction.

As preferably, described rare-earth elements La counts 0.4% with massfraction.

As preferably, described microarc oxidation equipment providedly exchange microarc oxidation equipment provided for two pulse.

As preferably, described electrolytic solution is silicate electrolyte.

Beneficial effect of the present invention:

In silicate systems, add rare-earth elements La additive differential arc oxidation is carried out to aluminum magnesium alloy, after differential arc oxidation, the crizzle of ceramic film and porosity obviously reduce, especially in the electrolytic solution the content of rare earth La additive is when about 0.4g/L, and after differential arc oxidation, specimen surface can obtain the good ceramic film of over-all properties.

accompanying drawing illustrates:

Fig. 1 is the influence curve of rare-earth elements La additive to differential arc oxidation film layer;

Fig. 2 is the influence curve of rare-earth elements La additive to differential arc oxidation film layer hardness.

embodiment:

Embodiment:

In the present invention microarc oxidation equipment provided for two pulse exchange microarc oxidation equipment provided, electrolytic solution is silicate electrolyte.

First the electrolytic solution of different rare earth La content is prepared, scoring with massfraction Han rare earth La be not 0,0.1%, 0.2%, 0.3%, 0.4%, 0.5% and 0.6%, its numbering is respectively 1,2,3,4,5,6, then prepares ceramic oxide rete by microarc oxidation equipment provided for the employing of this electrolytic solution on aluminum magnesium alloy surface.

Ceramic layer mean thickness is measured with TT230 cladding thickness measurer, can obviously be found out by Fig. 1, under silicate systems, add rare-earth elements La additive, when micro-arc oxidation electrolyte middle-weight rare earths La content is less than 0.4g/L, the mean thickness generating ceramic film increases with the increase of La content.When La content is greater than 0.4g/L, the ceramic film thickness that the increase with La content generates declines on the contrary to some extent.When the concentration of rare-earth elements La is at about 0.4g/L, corresponding thicknesses of layers value is maximum, and when not adding rare earth element, thicknesses of layers increases 15 μm.

Adopt HV1000 microhardness tester to measure the microhardness of sample, concrete data see the following form:

Figure 2 shows that measured average rete microhardness simulation mapping, as seen from Figure 2, the changes in hardness trend of Micro-Arc Oxidized Ceramic Coating and the variation tendency of thicknesses of layers similar, namely subtract afterwards along with the increase of rare-earth elements La concentration first increases.When rare-earth elements La concentration is at about 0.4g/L, film hardness value reaches maximum (625HV), than do not add rare earth element time hardness improve half.

Claims

1. add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution, it is characterized in that: adopt and microarc oxidation equipment providedly prepare ceramic oxide rete on aluminum magnesium alloy surface, add rare-earth elements La preparing in ceramic oxide rete electrolytic solution used, described rare-earth elements La counts 0.3% ~ 0.5% with massfraction.

2. the preparation method adding rare earth La raising aluminum magnesium alloy performance in the electrolytic solution according to claim 1, is characterized in that: described rare-earth elements La counts 0.4% with massfraction.

3. according to claim 1ly add the preparation method that rare earth La improves aluminum magnesium alloy performance in the electrolytic solution, it is characterized in that: described microarc oxidation equipment provided for two pulse interchange microarc oxidation equipment provided.

4. the preparation method adding rare earth La raising aluminum magnesium alloy performance in the electrolytic solution according to claim 1, is characterized in that: described electrolytic solution is silicate electrolyte.