Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of anodized aluminum alloy section bar, achieve the optimization of Production technology of aluminum alloy sectional bar, its excellent performance.
The invention discloses a kind of anodized aluminum alloy section bar, 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: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 90-120 DEG C and after being incubated 0.5-1h, be warming up to 180-220 DEG C and after being incubated 0.5-1h, be warming up to 295-315 DEG C and after being incubated 0.5-1h, be warming up to 380-410 DEG C and after being incubated 0.5-1h, be warming up to 450-480 DEG C, overflow mould is positioned over and is incubated 4-8h in the holding furnace of 450-500 DEG C and heats, ingot casting is positioned over and is incubated 1-2h in the holding furnace of 450-520 DEG C and heats, wherein, the deflection of tension leveling is 1-3%, extruding rate is 8-40m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.3-3.7 μm, wherein, anodic oxidation solution consists of (50 ± 0.45) g/L sulfuric acid+(10 ± 0.3) g/L adipic acid, anodizing temperature is (25 ± 1) DEG C, anodizing time is 19-21min, voltage is (15 ± 1) V, cathode material is pure stereotype, electric current is (0.6 ± 0.04) A/dm2, 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.
In the present invention, the anodized aluminum alloy section bar 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 Mg2si 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 alloy2the 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 CuAl2phase and Cu3al2phase, 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-Al9FeSi phase in version is granular α-Al15 (FeMn) 3Si2 disperse phase, thus eliminate the harmful effect of the relative alloy property of thick needle crystal, reduce Impurity Fe to the disadvantageous effect of material property, carry heavy alloyed moulding, meanwhile, granular α-Al15(FeMn)3si2disperse phase particle can also stop the recrystallize of alloy in subsequent thermal extrusion process used for forming, and promotes Mg in ag(e)ing process2the 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 extrusion process, improve the yield rate of alloy further, 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.
Anodized aluminum alloy section bar 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: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 90 DEG C and after being incubated 0.6h, be warming up to 195 DEG C and after being incubated 0.7h, be warming up to 300 DEG C and after being incubated 0.9h, be warming up to 385 DEG C and after being incubated 0.6h, be warming up to 475 DEG C, overflow mould is positioned over and is incubated 7h in the holding furnace of 490 DEG C and heats, ingot casting is positioned over and is incubated 1h in the holding furnace of 460 DEG C and heats, wherein, the deflection of tension leveling is 3%, extruding rate is 35m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.5 μm, wherein, anodic oxidation solution consists of 50g/L sulfuric acid+10g/L adipic acid, anodizing temperature is 24 DEG C, anodizing time is 21min, voltage is 15V, cathode material is pure stereotype, electric current is 0.6A/dm2, and sealing of hole adopts rare chromic acid sealing of hole.
Embodiment 2
S1: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 120 DEG C and after being incubated 0.8h, be warming up to 210 DEG C and after being incubated 0.6h, be warming up to 310 DEG C and after being incubated 1h, be warming up to 390 DEG C and after being incubated 0.8h, be warming up to 470 DEG C, overflow mould is positioned over and is incubated 7h in the holding furnace of 480 DEG C and heats, ingot casting is positioned over and is incubated 2h in the holding furnace of 510 DEG C and heats, wherein, the deflection of tension leveling is 1%, extruding rate is 15m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.6 μm, wherein, anodic oxidation solution consists of 50.1g/L sulfuric acid+10.2g/L adipic acid, anodizing temperature is 26 DEG C, anodizing time is 19min, voltage is 14V, cathode material is pure stereotype, electric current is 0.62A/dm2, and sealing of hole adopts rare chromic acid sealing of hole.
Embodiment 3
S1: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 95 DEG C and after being incubated 0.5h, be warming up to 195 DEG C and after being incubated 0.8h, be warming up to 305 DEG C and after being incubated 0.6h, be warming up to 405 DEG C and after being incubated 0.7h, be warming up to 470 DEG C, overflow mould is positioned over and is incubated 5h in the holding furnace of 460 DEG C and heats, ingot casting is positioned over and is incubated 1.5h in the holding furnace of 450 DEG C and heats, wherein, the deflection of tension leveling is 2.5%, extruding rate is 40m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.5 μm, wherein, anodic oxidation solution consists of 49.7g/L sulfuric acid+9.7g/L adipic acid, anodizing temperature is 26 DEG C, anodizing time is 21min, voltage is 16V, cathode material is pure stereotype, electric current is 0.61A/dm2, and sealing of hole adopts rare chromic acid sealing of hole.
Embodiment 4
S1: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 100 DEG C and after being incubated 1h, be warming up to 180 DEG C and after being incubated 0.9h, be warming up to 302 DEG C and after being incubated 0.6h, be warming up to 405 DEG C and after being incubated 0.8h, be warming up to 475 DEG C, overflow mould is positioned over and is incubated 7h in the holding furnace of 480 DEG C and heats, ingot casting is positioned over and is incubated 1h in the holding furnace of 520 DEG C and heats, wherein, the deflection of tension leveling is 2.8%, extruding rate is 8m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.45 μm, wherein, anodic oxidation solution consists of 50.45g/L sulfuric acid+10.3g/L adipic acid, anodizing temperature is 26 DEG C, anodizing time is 19min, voltage is 14V, cathode material is pure stereotype, electric current is 0.56A/dm2, and sealing of hole adopts rare chromic acid sealing of hole.
Embodiment 5
S1: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 100 DEG C and after being incubated 0.5h, be warming up to 220 DEG C and after being incubated 0.6h, be warming up to 298 DEG C and after being incubated 0.5h, be warming up to 400 DEG C and after being incubated 0.5h, be warming up to 475 DEG C, overflow mould is positioned over and is incubated 7h in the holding furnace of 480 DEG C and heats, ingot casting is positioned over and is incubated 2h in the holding furnace of 470 DEG C and heats, wherein, the deflection of tension leveling is 1.5%, extruding rate is 24m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.3 μm, wherein, anodic oxidation solution consists of 49.55g/L sulfuric acid+10.3g/L adipic acid, anodizing temperature is 24 DEG C, anodizing time is 20min, voltage is 14V, cathode material is pure stereotype, electric current is 0.64A/dm2, and sealing of hole adopts rare chromic acid sealing of hole.
Embodiment 6
S1: take each raw material and carry out founding, obtain ingot casting;
S2: extruding: by after the ingot homogenization that obtains in S1, car removes crust, extrude on a hydraulic press, to container before extruding, overflow mould and ingot casting heat, treat after having extruded that section bar is cooled to less than 50 DEG C, after tension leveling is carried out to section bar, heat-treat, container type of heating is: be warming up to 100 DEG C and after being incubated 1h, be warming up to 200 DEG C and after being incubated 1h, be warming up to 300 DEG C and after being incubated 0.5h, be warming up to 400 DEG C and after being incubated 0.5h, be warming up to 470 DEG C, overflow mould is positioned over and is incubated 7h in the holding furnace of 500 DEG C and heats, ingot casting is positioned over and is incubated 2h in the holding furnace of 510 DEG C and heats, wherein, the deflection of tension leveling is 2.5%, extruding rate is 35m/min,
S3: treatment: the heat treated section bar completed in S2 is carried out according to the process route of surface finish → degreasing → alkali cleaning → water flushing → bright dipping → water flushing → purified rinse water → anodic oxidation → sealing of hole → drying the oxide film that treatment forms 3.5 μm, wherein, anodic oxidation solution consists of 50g/L sulfuric acid+10g/L adipic acid, anodizing temperature is 25 DEG C, anodizing time is 20min, voltage is (15 ± 1) V, cathode material is pure stereotype, electric current is 0.6A/dm2, and 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; In extrusion process, before extruding, container, overflow mould and ingot casting are heated, be conducive to being out of shape in alloy extrusion process, intermittent heat is carried out to container, container can be made to heat up more even, extrusion process, along with the distortion of alloy, be parallel in the direction of extrusion, crystal grain is elongated, and grain-size obtains refinement; By the optimization to top layer treatment process, in anode oxidation process, electric current is easily concentrated at aluminium alloy Second Phase Particle place, cause Second Phase Particle optimum solvation, form hole defect, cause the uneven of oxide film structure, and due to current concentration, local heat buildup, causes surrounding oxidic film excessive dissolution and becomes region the weakest in oxide film, hexanodioic acid add can and Al3+react and produce insolubles Al2(C6h8o4)3be adsorbed near Second Phase Particle, thus reduce the generation of defect area, reduce sulfuric acid concentration in anodic oxidation solution makes current density less simultaneously, is conducive to oxide film and has higher density, simultaneously, the rapid solution added due to alloy phase effectively can be suppressed of hexanodioic acid, decrease hole defect, thus decrease the formation of crack causing repeated stress failure, thus be conducive to the fatigue lifetime of section bar.
In embodiment 1-6, the tensile strength of anodized aluminum alloy section bar 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, anodized aluminum alloy section bar 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.