CN103103414B - A kind of chromaking is processed the smelting preparation method of aluminium alloy extrusions - Google Patents
A kind of chromaking is processed the smelting preparation method of aluminium alloy extrusions Download PDFInfo
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- CN103103414B CN103103414B CN201210530770.8A CN201210530770A CN103103414B CN 103103414 B CN103103414 B CN 103103414B CN 201210530770 A CN201210530770 A CN 201210530770A CN 103103414 B CN103103414 B CN 103103414B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 69
- 238000001125 extrusion Methods 0.000 title claims abstract description 40
- 238000003723 Smelting Methods 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 16
- 239000004411 aluminium Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000010792 warming Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000011777 magnesium Substances 0.000 claims abstract description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 4
- 238000011017 operating method Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims abstract description 3
- 238000005266 casting Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000007670 refining Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 10
- 230000032683 aging Effects 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052580 B4C Inorganic materials 0.000 claims description 5
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000010583 slow cooling Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 229910001344 5052 aluminium alloy Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 210000000078 claw Anatomy 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005237 degreasing agent Methods 0.000 claims description 3
- 239000013527 degreasing agent Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 abstract 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910003470 tongbaite Inorganic materials 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- -1 boron carbides Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000036186 satiety Effects 0.000 description 1
- 235000019627 satiety Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Extrusion Of Metal (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of chromaking and process the smelting preparation method of aluminium alloy extrusions, include following operating procedure: (1) configuration aluminium alloy melt: by following raw materials in part by weight: 55-60? 6063 aluminium ingots, discarded aluminum products, 5-10 chromium carbide, the 5-7 glass dregs powder of 30-40 carry out proportioning, above-mentioned raw materials is added to smelting furnace, be warming up to furnace charge and start to soften while staying, sprinkle one deck coverture to molten surface and cover; After furnace charge melts completely, should suitably stir melt, so that temperature uniformity everywhere in molten bath adds magnesium ingot in the most backward melt; In feed proportioning of the present invention, add aluminium scrap material, be conducive to aluminium section bar stable performance, reduced the possibility that occurs not having the Effect of Materials aluminium section bar quality detecting when aluminium liquid is smelted; Aluminium alloy section surface is carried out to chromaking processing, improved the resistance to corrosion of aluminium alloy section surface oxide-film and the adhesion of aluminium alloy extrusions and coating.
Description
Technical field
The present invention relates to a kind of chromaking and process the smelting preparation method of aluminium alloy extrusions, belong to aluminum alloy materials process technologyField.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structural material in industry, at Aeronautics and Astronautics, automobile, machineIn tool manufacture, boats and ships, widely apply. Along with the develop rapidly of science and technology and industrial economy in recent years, rightThe demand of Welded structural member is increasing, makes the Research on Weldability of aluminium alloy also thereupon deeply. Aluminium alloyExtensive use promoted the development of aluminum alloy solder technology, aluminium alloy has been expanded again in the development of solder technology simultaneouslyApplication, therefore the solder technology of aluminium alloy is just becoming one of focus of research. Aluminium-plastic panel is by process tableFace processes and uses 3003 alumals, 5005 aluminium-magnesium alloy sheets of coating baking vanish as surface, and PE plastics are doneFor sandwich layer, macromolecule felted-membrane processes through series of process the new material being composited. Of the prior artAluminium alloy extrusions often there will be impurity content large in fusion process, the shortcomings such as whole complex technical process.
Summary of the invention
The melting preparation that provides a kind of chromaking to process aluminium alloy extrusions is provided for the deficiencies in the prior artMethod, the combination property of raising aluminium alloy extrusions.
The technical solution used in the present invention is as follows:
Chromaking is processed a smelting preparation method for aluminium alloy extrusions, it is characterized in that, includes following operating procedure:
(1) configuration aluminium alloy melt: by following raw materials in part by weight: 5052 aluminium ingot 55-65 parts, discarded aluminumProduct 32-42 part, boron carbide 5-10 part, nano ceramic powder 5-10 part are carried out proportioning, and above-mentioned raw materials is addedSmelting furnace, is warming up to furnace charge and starts to soften while staying, sprinkles one deck coverture cover to molten surface; Work as furnace chargeAfter fusing, should suitably stir melt completely, so that temperature uniformity everywhere in molten bath adds in the most backward meltEnter magnesium ingot; Controlling the quality percentage composition of each element in melt is: 0.18≤Si≤0.25%, 1.2≤Mg≤2.8％、0.12≤P≤0.20％、Sn0.20～0.30、0.20≤Fe≤0.42％、0.06≤Cu≤0.10％、0.06≤Mn≤0.12%, 0.05≤V≤0.15, Zn≤0.10%, other elements totals≤0.15, surplus areAl；
(2) refining: utilize refining agent to carry out refining treatment to aluminium alloy melt, when aluminium alloy melt is through refining placeReason, and claw after surface scum, melt can be infused into standing furnace, aluminium alloy melt rises after entering standing furnaceTemperature, to 700-750 DEG C of maintenance 20-30min, then utilizes argon gas by the hydrogen in aluminium alloy melt and fine impurities bandTo surface, thereby reduce the hydrogen content in aluminium liquid; Add 20-30Kg sodium removing agent by aluminium alloy melt per ton again,Described sodium removing agent is made up of following parts by weight of component: potassium chloride 50-60 part, magnesium chloride 30-40 part, sixChlorination two carbon 2-10 parts make aluminum alloy round casting rod after casting in standing furnace again;
(3) after the sawing of heat-treatable aluminum alloy circle casting rod, carry out homogenizing annealing processing, in inert gas, first heat upAt 300-320 DEG C, insulation 2-3 hour, a 70-90 per hour DEG C intensification is heated to be incubated 6-8 at 520-550 DEG CHour, then put into 300-320 DEG C of No. 200 solvent naphthas with oily slow cooling, then a 60-80 per hour DEG C intensification addsHeat is to 360-380 DEG C, and degree of insulation 5-6 hour; Be cooled to again at 150-180 DEG C and be incubated 3-4 hour;
(4) aluminum alloy round casting rod is heated to 450-500 DEG C by extrusion modling, then utilizes extruder to heatCircle casting rod extrusion molding from mould, extrusion die temperature 240-260 DEG C, extrusion speed 7-8 m/min; WindCold mould material surface temperature, after 100-130 DEG C, is put into 2-5 DEG C of water-based quenching liquid and is carried out Quenching Treatment 5-7 minute;The last aluminium alloy extrusions having pushed that takes out from water carries out normal temperature alignment processing, at 120-130 DEG C, is incubated 3-5Hour;
Aluminium alloy extrusions, after alignment is processed, is quenched to aluminium alloy extrusions, hardening heat 400-500 DEG C,The type of cooling is chosen as high wind and coordinates water smoke quench cooled, ensures to obtain high oversaturated solid solution in matrix;
(6) after extruding finishes, within 8 hours, aluminium alloy extrusions is carried out to Ageing Treatment, aging temp is165-185 DEG C, temperature retention time is 6-8h;
Section bar after Ageing Treatment is carried out to subzero treatment, and liquid nitrogen temperature is-125～-150 DEG C, subzero treatment timeBetween be 2-5 hour, the isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2～3min/mm2, darkThe section bar that after cold treatment, temperature has been gone back up to room temperature is put into the boiling water of 100 DEG C and is heated 60-80 minute;
(8) chromaking is processed aluminium alloy extrusions through degreasing agent cleaning, the processing of chromaking agent chromaking.
The fineness of described boron carbide is 5-8 μ m.
Described heat treatment, carries out homogenizing annealing processing after aluminum alloy round ingot sawing, in inert gas, be first warming up toAt 300 DEG C, be incubated 2.5 hours, 80 DEG C of intensifications per hour are heated to be incubated 7 hours at 530 DEG C, then putIn entering in 300 DEG C of No. 200 solvent naphthas, with oily slow cooling, then 70 DEG C of intensifications per hour are heated to 370 DEG C, and insulationSpend 5.5 hours; Be cooled to again at 170 DEG C and be incubated 3.5 hours.
In feed proportioning of the present invention, add aluminium scrap material, because aluminium scrap material is through primary smelting, its stable components,Be conducive to aluminium section bar stable performance therefore increase aluminium scrap material in the present invention's formula, reduced when aluminium liquid is smelted and occurred notThere is the possibility of the Effect of Materials aluminium section bar quality of detection; The steps such as annealing in process, Quenching Treatment, alignment processing,Increase the uniformity of interior tissue and the refinement of crystal grain of aluminum, greatly improved the quality of aluminium alloy extrusionsWith processing characteristics; Aluminium alloy section surface is carried out to chromaking processing, improved aluminium alloy section surface oxide-filmThe adhesion of resistance to corrosion and aluminium alloy extrusions and coating.
Detailed description of the invention
Below in conjunction with executing example, the invention will be further described, but be not limited to the following example.
Chromaking is processed a smelting preparation method for aluminium alloy extrusions, includes following operating procedure:
(1) configuration aluminium alloy melt:
Press row weight portion (kilogram) raw material: 55 part of 5052 aluminium ingot, 32 parts of discarded aluminum products, 5 parts of boron carbides,5 parts of nano ceramic powders carry out proportioning, and the fineness of boron carbide is 5-8 μ m, and above-mentioned raw materials is added to smelting furnace,Be warming up to furnace charge and start to soften while staying, sprinkle one deck coverture to molten surface and cover; When furnace charge melts completelyAfter, should suitably stir melt, so that temperature uniformity everywhere in molten bath adds magnesium ingot in the most backward melt;Controlling the quality percentage composition of each element in melt is: 0.18%≤Si≤0.25%, 1.2%≤Mg≤2.8%,0.12％≤P≤0.20％、Sn0.20～0.30％、0.20％≤Fe≤0.42％、0.06％≤Cu≤0.10％、0.06%≤Mn≤0.12%, 0.05%≤V≤0.15, Zn≤0.10%, other elements add up to≤0.15, more thanAmount is Al;
(2) refining: utilize refining agent to carry out refining treatment to aluminium alloy melt, when aluminium alloy melt is through refining placeReason, and claw after surface scum, melt can be infused into standing furnace, aluminium alloy melt rises after entering standing furnaceTemperature, to 700-750 DEG C of maintenance 20-30min, then utilizes argon gas by the hydrogen in aluminium alloy melt and fine impurities bandTo surface, thereby reduce the hydrogen content in aluminium liquid; Add 30Kg sodium removing agent by aluminium alloy melt per ton again, instituteThe sodium removing agent of stating by following weight portion (kilogram) component mix form: potassium chloride 50, magnesium chloride 40, chlordeneChange two carbon 2, in standing furnace, after casting, make again aluminum alloy round casting rod;
(3) heat treatment
After the sawing of aluminum alloy round casting rod, carry out homogenizing annealing processing, in inert gas, be first warming up at 300 DEG C, insulation2.5 hours, 80 DEG C of intensifications per hour were heated to be incubated 7 hours at 530 DEG C, then put into 300 DEG C No. 200 moltenIn in agent oil with oily slow cooling to room temperature, then 70 DEG C of intensifications per hour are heated to 370 DEG C, and degree of insulation 5.5 hours;Be cooled to again at 170 DEG C and be incubated 3.5 hours;
(4) extrusion modling
Aluminum alloy round casting rod is heated to 450-500 DEG C, then utilize extruder by the round casting rod heating from mouldExtrusion molding, extrusion die temperature 240-260 DEG C, extrusion speed 7-8 m/min; Air-cooled section bar surface temperatureAfter 100-130 DEG C, put into 2-5 DEG C of water-based quenching liquid and carry out Quenching Treatment 5-7 minute; Finally from water, getThe aluminium alloy extrusions that goes out to have pushed carries out normal temperature alignment processing, at 120-130 DEG C, is incubated 3-5 hour;
(5) to aluminium alloy extrusions through alignment process after, aluminium alloy extrusions is quenched, hardening heat400-500 DEG C, the type of cooling is chosen as high wind and coordinates water smoke quench cooled, ensures to obtain high satiety in matrixWith solid solution;
(6) after extruding finishes, within 8 hours, aluminium alloy extrusions is carried out to Ageing Treatment, aging temp is165-185 DEG C, temperature retention time is 6-8h;
(7) section bar after Ageing Treatment is carried out to subzero treatment, liquid nitrogen temperature is-125～-150 DEG C, subzero treatmentTime be 2-5 hour, the isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2～3min/mm2,The section bar that after subzero treatment, temperature has been gone back up to room temperature is put into the boiling water of 100 DEG C and is heated 60-80 minute;
(8) chromaking processing
Aluminium alloy extrusions is through degreasing agent cleaning, the processing of chromaking agent chromaking.
After testing, product chemical composition is: Si0.267%, Mg2.823%, Fe0.414%, Cu0.0604%, Mn0.0586%, Cr0.312%, Zn0.0856%, other elements add up to 0.121%, all the other are Al; Mechanical propertyFor: tensile strength is 314MPa, and yield strength is 263MPa, and percentage elongation is 16.8%; Surface property is:The local thickness 25 μ m of single-piece, sand trail barasion coefficient 559g/ μ m, drop alkali test 136s.
Claims (3)
1. chromaking is processed a smelting preparation method for aluminium alloy extrusions, it is characterized in that, includes following operating procedure:
(1) configuration aluminium alloy melt: by following raw materials in part by weight: 5052 aluminium ingot 55-65 parts, discarded aluminum products 32-42 part, boron carbide 5-10 part, nano ceramic powder 5-10 part are carried out proportioning, above-mentioned raw materials is added to smelting furnace, be warming up to furnace charge and start to soften while staying, sprinkle one deck coverture to molten surface and cover; After furnace charge melts completely, should suitably stir melt, so that temperature uniformity everywhere in molten bath adds magnesium ingot in the most backward melt; The quality percentage composition of controlling each element in melt is :≤Si≤0.25,1.2≤Mg≤2.8,0.12≤P≤0.20, Sn0.20～0.30,0.20≤Fe≤0.42,0.06≤Cu≤0.10,0.06≤Mn≤0.12,0.05≤V≤0.15, Zn≤0.10, other elements totals≤0.15, surplus are Al;
(2) refining: utilize refining agent to carry out refining treatment to aluminium alloy melt, when aluminium alloy melt is through refining treatment, and claw after surface scum, melt can be infused into standing furnace, aluminium alloy melt is warming up to 700-750 DEG C of maintenance 20-30min after entering standing furnace, then utilize argon gas to take the hydrogen in aluminium alloy melt and fine impurities to surface, thereby reduce the hydrogen content in aluminium liquid; Add 20-30Kg sodium removing agent by aluminium alloy melt per ton again, described sodium removing agent is made up of following parts by weight of component: potassium chloride 50-60 part, magnesium chloride 30-40 part, chlordeneization two carbon 2-10 parts make aluminum alloy round casting rod after casting in standing furnace again;
(3) after the sawing of heat-treatable aluminum alloy circle casting rod, carry out homogenizing annealing processing, in inert gas, be first warming up at 300-320 DEG C, insulation 2-3 hour, a 70-90 per hour DEG C intensification is heated to be incubated 6-8 hour at 520-550 DEG C, then put into 300-320 DEG C of No. 200 solvent naphthas with oily slow cooling, a 60-80 per hour DEG C intensification is heated to 360-380 DEG C again, and degree of insulation 5-6 hour; Be cooled to again at 150-180 DEG C and be incubated 3-4 hour;
(4) aluminum alloy round casting rod is heated to 450-500 DEG C by extrusion modling, then utilizes extruder by the round casting rod extrusion molding from mould heating, extrusion die temperature 240-260 DEG C, extrusion speed 7-8 m/min; Air-cooled section bar surface temperature, after 100-130 DEG C, is put into 2-5 DEG C of water-based quenching liquid and is carried out Quenching Treatment 5-7 minute; The last aluminium alloy extrusions having pushed that takes out from water carries out normal temperature alignment processing, at 120-130 DEG C, is incubated 3-5 hour;
(5) to aluminium alloy extrusions after alignment is processed, aluminium alloy extrusions is quenched, hardening heat 400-500 DEG C, the type of cooling is chosen as high wind and coordinates water smoke quench cooled, ensures to obtain high oversaturated solid solution in matrix;
(6) after extruding finishes, within 8 hours, aluminium alloy extrusions is carried out to Ageing Treatment, aging temp is 165-185 DEG C, and temperature retention time is 6-8h;
(7) section bar after Ageing Treatment is carried out to subzero treatment, liquid nitrogen temperature is-125～-150 DEG C, the time of subzero treatment is 2-5 hour, isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2～3min/mm2, and the section bar that after subzero treatment, temperature has been gone back up to room temperature is put into the boiling water of 100 DEG C and heated 60-80 minute;
(8) chromaking is processed aluminium alloy extrusions through degreasing agent cleaning, the processing of chromaking agent chromaking.
2. a kind of chromaking according to claim 1 is processed the smelting preparation method of aluminium alloy extrusions, it is characterized in that, the fineness of described boron carbide is 5-8 μ m.
3. a kind of chromaking according to claim 1 is processed the smelting preparation method of aluminium alloy extrusions, it is characterized in that, described heat treatment, after the sawing of aluminum alloy round casting rod, carry out homogenizing annealing processing, in inert gas, be first warming up at 300 DEG C, be incubated 2.5 hours, 80 DEG C of intensifications per hour are heated to be incubated 7 hours at 530 DEG C, in 300 DEG C of No. 200 solvent naphthas, with oily slow cooling, then 70 DEG C of intensifications per hour are heated to 370 DEG C, and degree of insulation 5.5 hours; Be cooled to again at 170 DEG C and be incubated 3.5 hours.
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| CN102634705A (en) * | 2012-03-02 | 2012-08-15 | 佛山市高明永利坚铝业有限公司 | Middle high strength aluminum alloy capable of reducing quench sensitivity, production process thereof and profile process method |
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| LU69788A1 (en) * | 1974-04-04 | 1976-03-17 | Pechiney Aluminium | |
| JP3819263B2 (en) * | 2001-07-10 | 2006-09-06 | 株式会社神戸製鋼所 | Aluminum alloy material with excellent room temperature aging control and low temperature age hardening |
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| CN1760497A (en) * | 2004-10-15 | 2006-04-19 | 上海振兴铝业有限公司 | Weatherproof color shape bars in aluminium alloy, and manufacturing method |
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| CN101948959A (en) * | 2010-09-30 | 2011-01-19 | 昆明理工大学 | Slag-forming agent for fusion casting of environment-friendly zinc and zinc alloy |
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| CN102181757A (en) * | 2011-06-20 | 2011-09-14 | 岳阳德利亨新材料科技有限公司 | Refining agent for smelting aluminum alloy and preparation method of refining agent |
| CN102505087A (en) * | 2011-12-31 | 2012-06-20 | 辽宁忠旺集团有限公司 | Method for manufacturing aluminum alloy section material for floor of rail transport car body |
| CN102634705A (en) * | 2012-03-02 | 2012-08-15 | 佛山市高明永利坚铝业有限公司 | Middle high strength aluminum alloy capable of reducing quench sensitivity, production process thereof and profile process method |
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