CN104789830A - Acid-resistant aluminum alloy section - Google Patents

Acid-resistant aluminum alloy section Download PDF

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CN104789830A
CN104789830A CN201410239272.7A CN201410239272A CN104789830A CN 104789830 A CN104789830 A CN 104789830A CN 201410239272 A CN201410239272 A CN 201410239272A CN 104789830 A CN104789830 A CN 104789830A
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master alloy
alloy
ingot
si
ti
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CN201410239272.7A
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CN104789830B (en
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银士宝
周风华
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安徽鑫发铝业有限公司
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Abstract

The invention discloses an acid-resistant aluminum alloy section, which belongs to the field of metal materials. The aluminum alloy section comprises the following components by weight: 0.75 to 0.90% of Mg, 0.5 to 0.6% of Si, 0.10 to 0.14% of Cu, 0.20 to 0.25% of Mn, 0 to 0.1% of Ti, 0 to 0.1% of Cr, 0.1 to 0.3% of Fe and 0.20 to 0.28% of Zn, with the balance being Al. According to the invention, through optimization of alloy components and the production procedures of melting and casting, homogenization, extrusion, heat treatment and surface processing, the aluminum alloy section has effectively improved mechanical properties and surface film quality.

Description

A kind of anti-acid aluminium alloy extrusions

Technical field

The present invention relates to metal material field, particularly relate to a kind of anti-acid aluminium alloy extrusions.

Background technology

Sliding window advantage be succinct, attractive in appearance, window width is large, glass block is large, broad view, daylight rate are high, clean the windows conveniently, use flexible, safe and reliable, long service life, opens, occupy space few in a plane, installs screen window convenient etc.Most popular in current door and window is exactly sliding window, and because aluminium alloy extrusions to have the advantage of light, the attractive in appearance economy of quality relative to other shapes, current sliding window mainly adopts aluminium alloy extrusions to make.In prior art, the performance of aluminium alloy extrusions does not reach optimum yet, especially when south China uses, unsatisfactory in acid resistance, still needs constantly to improve.

Therefore, how by optimizing Production technology of aluminum alloy sectional bar, obtain a kind of aluminium alloy extrusions of excellence, the service requirements better meeting sliding window is current problem demanding prompt solution.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, provide a kind of anti-acid aluminium alloy extrusions, achieve the optimization of Production technology of aluminum alloy sectional bar, its excellent performance.

The invention discloses a kind of anti-acid aluminium alloy extrusions, its composition component comprises by weight percentage: Mg:0.75-0.90; Si:0.5-0.6; Cu:0.10-0.14; Mn:0.20-0.25; Ti:0-0.1; Cr:0-0.1; Fe:0.1-0.3; Zn:0.20-0.28; Surplus is Al, and prepares according to the following steps:

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 750-780 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 750-760 DEG C of insulation 30-60min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2-2.4mol/L propanedioic acid, anodizing temperature is 13-17 DEG C, anodizing time is 4-8h, voltage is (100 ± 1) V, and cathode material is graphite cake, and electric current is 17-23mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Preferably, in its moiety, the mass ratio of Mg and Si is (1.2-1.5): 1.

Preferably, in step sl, when adding Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn, Cr, Zn, Mg, Al-5%Ti-1%B grain-refining agent, degasification is all carried out except slag operation.

In the present invention, the anti-acid aluminium alloy extrusions of proposition is by optimizing components, and production technique is improved, and improve the over-all properties of aluminium alloy extrusions, compared with prior art, concrete advantage is as follows:

1, alloy composition is optimized, and improves the content of Mg element and Si element in alloy, and suitably improves the content of Mn element, Cu element and Zn element; Due to Mg 2si phase is the main strengthening phase in Al-Mg-Si system alloy, and the impact of its quantity, size and form alloy performance is very big, by improving the content of Mg element and Si element in alloy, can improve Mg in alloy 2the content of Si phase, thus lay the foundation for the lifting of final alloy strength, adding of appropriate Zn contributes to carrying heavy alloyed final strength, and meanwhile, a small amount of Cu adds, and can generate CuAl 2phase and Cu 3al 2phase, these two kinds have ageing strengthening effect mutually, contribute to the raising of final alloy strength; Adding of appropriate Mn element, make ingot casting after follow-up Homogenization Treatments, acicular beta-Al 9feSi phase in version is granular α-Al 15(FeMn) 3si 2disperse phase, thus the harmful effect eliminating the relative alloy property of thick needle crystal, reduce Impurity Fe to the disadvantageous effect of material property, carry heavy alloyed moulding, meanwhile, and granular α-Al 15(FeMn) 3si 2disperse phase particle can also stop the recrystallize of alloy in subsequent thermal extrusion process used for forming, and promotes Mg in ag(e)ing process 2the precipitation of Si phase, refinement recrystal grain, Mn can also expand the quenching temperature upper limit, increases the solid solubility of alloying element, thus improves alloy over-all properties;

2, production technique is improved, by the optimization to melting technology, make each alloying element realize good fusion, by the optimization to top layer treatment process, improve alloy surface pattern and state, improve the stability of top layer rete, improve the solidity to corrosion of alloy.

Embodiment

Below in conjunction with specific examples, the present invention is described in detail; should understand; embodiment is only for illustration of the present invention, instead of for limiting the present invention, any amendment, equivalent replacement etc. made on basis of the present invention is all in protection scope of the present invention.

Anti-acid aluminium alloy extrusions disclosed in this invention, in each embodiment, composition proportion (weight percent) detected result of ingot casting is as shown in table 1:

Mg Si Cu Mn Cr Ti Zn Fe Al Embodiment 1 0.9 0.6 0.10 0.22 0.10 0.08 0.26 0.2 Surplus Embodiment 2 0.75 0.5 0.14 0.25 0.10 0.06 0.20 0.2 Surplus Embodiment 3 0.80 0.52 0.12 0.20 0.08 0.07 0.22 0.2 Surplus Embodiment 4 0.82 0.55 0.10 0.23 0.07 0.08 0.28 0.21 Surplus Embodiment 5 0.85 0.58 0.12 0.20 0.06 0.08 0.27 0.18 Surplus

Embodiment 6 0.83 0.56 0.13 0.24 0.07 0.06 0.25 0.22 Surplus

Each embodiment preparation method is as follows:

Embodiment 1

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 780 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 760 DEG C of insulation 30min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, Al-10%Si master alloy is added, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, during Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2.2mol/L propanedioic acid, anodizing temperature is 15 DEG C, anodizing time is 6h, voltage is 100V, and cathode material is graphite cake, and electric current is 20mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Embodiment 2

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 750 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 750 DEG C of insulation 60min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, add Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, M g, Al-5%Ti-1%B grain-refining agent time, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2mol/L propanedioic acid, anodizing temperature is 14 DEG C, anodizing time is 7h, voltage is 100.5V, and cathode material is graphite cake, and electric current is 23mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Embodiment 3

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 760 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 760 DEG C of insulation 50min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, Al-10%Si master alloy is added, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, during Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2.4mol/L propanedioic acid, anodizing temperature is 13 DEG C, anodizing time is 6h, voltage is 99.5V, and cathode material is graphite cake, and electric current is 19mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Embodiment 4

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 770 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 760 DEG C of insulation 40min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, Al-10%Si master alloy is added, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, during Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2.1mol/L propanedioic acid, anodizing temperature is 17 DEG C, anodizing time is 4h, voltage is 100.3V, and cathode material is graphite cake, and electric current is 22mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Embodiment 5

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 760 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 750 DEG C of insulation 50min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, Al-10%Si master alloy is added, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, during Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2.3mol/L propanedioic acid, anodizing temperature is 15 DEG C, anodizing time is 8h, voltage is 99V, and cathode material is graphite cake, and electric current is 21mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

Embodiment 6

S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 770 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 755 DEG C of insulation 45min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation, wherein, Al-10%Si master alloy is added, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, during Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation,

S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;

S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2.3mol/L propanedioic acid, anodizing temperature is 15 DEG C, anodizing time is 5h, voltage is 101V, and cathode material is graphite cake, and electric current is 17mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.

In embodiment 1-6, ferro element is non-Addition ofelements, and it is mainly derived from mould in fusion process and uses inevitably introducing, by step S1, in fusion process, the control of technique makes each element good knitting, and the interpolation of Al-5%Ti-1%B grain-refining agent can play the effect of crystal grain thinning, and repeatedly degasification slagging-off can improve the control of impurity in fusion process, by the optimization to top layer treatment process, select propanedioic acid in Dicarboxylic Acids as anodic oxidation solution, because the growth of viscosity to oxide film of anodic oxidation solution has disadvantageous effect, and the growth of acid-soluble degree to oxide film has positively effect in anodic oxidation solution, consider and select 2.2mol/L propanedioic acid as anodic oxidation solution, by selecting weak acid, strengthen acid concentration prolongation oxidization time simultaneously, be conducive to the configuration improving oxide film, make the configuration of oxide film more regular, thus promote the performance of oxide film, and significantly improve the acid resistance of section bar.

In embodiment 1-6, the tensile strength of anti-acid aluminium alloy extrusions described in repeated test five groups, sand trial wear factor, drop alkali test and unit elongation, the parameter value of averaging of income data and aluminium alloy extrusions 6063-T6 anodic oxidation section bar is listed in table 2.

Table 2 embodiment 1-6 and typical 6063-T6 anodic oxidation section bar mechanical performance parameter

From the test data of embodiment 1-6 in above-mentioned table 1 and typical 6063-T6 anodic oxidation section bar tensile strength, sand trial wear factor, drop alkali test and unit elongation, no matter single performance or over-all properties, anti-acid aluminium alloy extrusions described in the present invention is all better than typical 6063-T6 anodic oxidation section bar, has excellent mechanical property, wear resistance and solidity to corrosion.

Claims (3)

1. an anti-acid aluminium alloy extrusions, is characterized in that, its composition component comprises by weight percentage: Mg:0.75-0.90; Si:0.5-0.6; Cu:0.10-0.14; Mn:0.20-0.25; Ti:0-0.1; Cr:0-0.1; Fe:0.1-0.3; Zn:0.20-0.28; Surplus is Al, and prepares according to the following steps:
S1: melting and casting: take aluminium ingot according to moiety, magnesium ingot, zinc ingot metal, chromium ingot, Al-10%Si master alloy, Al-50%Cu master alloy and Al-10%Mn master alloy, adopt Al-5%Ti-1%B as grain-refining agent, aluminium ingot to be added in smelting furnace and be heated to 750-780 DEG C make it to melt completely after, by Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, the order of Al-5%Ti-1%B grain-refining agent adds each material successively, after each material melts completely, at 750-760 DEG C of insulation 30-60min, obtain alloy melt, and pour into a mould, die sinking after alloy melt solidifies, and by ingot casting water-cooled to room temperature, each material melting process is carried out in seal cavity, in fusion process, adopt hexachloroethane as degasifier, and carry out repeatedly degasification except slag operation,
S2: after the ingot casting obtained in S1 is carried out homogenizing, extrude on a hydraulic press, heats container, overflow mould and ingot casting before extruding, treats that section bar is cooled to less than 50 DEG C, after carrying out tension leveling, heat-treat section bar after having extruded;
S3: treatment: the heat treated section bar completed in S2 is carried out treatment according to the process route of degreasing → alkali cleaning → water flushing → bright dipping → water flushing → anodic oxidation → sealing of hole → drying, wherein, anodic oxidation solution consists of 2-2.4mol/L propanedioic acid, anodizing temperature is 13-17 DEG C, anodizing time is 4-8h, voltage is (100 ± 1) V, and cathode material is graphite cake, and electric current is 17-23mA/cm 2, sealing of hole adopts rare chromic acid sealing of hole.
2. anti-acid aluminium alloy extrusions according to claim 1, is characterized in that, in its moiety, the mass ratio of Mg and Si is (1.2-1.5): 1.
3. anti-acid aluminium alloy extrusions according to claim 1, it is characterized in that, in step sl, when adding Al-10%Si master alloy, Al-50%Cu master alloy, Al-10%Mn master alloy, Cr, Zn, Mg, Al-5%Ti-1%B grain-refining agent, all carry out degasification except slag operation.
CN201410239272.7A 2014-05-30 2014-05-30 A kind of anti-acid aluminium alloy extrusions CN104789830B (en)

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CN109576542A (en) * 2018-12-29 2019-04-05 安徽鑫发铝业有限公司 A kind of wear-resisting outer casing of power supply aluminum profile

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