CN104117549B - A kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method - Google Patents
A kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method Download PDFInfo
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Abstract
The invention belongs to the technical field of power equipment aluminum alloy materials, be specially high strength and high conductivity rate aluminium alloy large scale rod bar manufacture method, utilize high strength and high conductivity rate large electric element in 6082 high strength and high conductivity rate large scale rod bar processing power equipments, be specially 6082T6 aluminium alloy and be greater than 150mm bar ~ 300mm bar.In aluminium alloy cast ingot used, the mass percent Si of element is 1.0% ~ 1.05%, Fe is≤0.12%, Cu is≤0.10%, Mn is 0.55% ~ 0.65%, Mg is 0.9% ~ 0.95%, Cr is≤0.10%, Zn is≤0.10%, Ti is≤0.05%, single impurity≤0.05%, add up to impurity≤0.15%, all the other are Al, can effectively solve a large amount of production, delivery problems, improve intensity and the electrical conductivity of large-size aluminum alloy bar, be conducive to processing and use, the mechanical property obtained by the method and stable conductivity, through repeatedly reappearing operation, all can meet the national standard that diameter is less than 150mm, can supplement or improve diameter and be greater than 150mm ~ 300mm bar national standard, and include property indices in national standard.
Description
Technical field
The invention belongs to the technical field of power equipment aluminum alloy materials, be specifically related to a kind of high strength and high conductivity rate aluminium alloy large scale rod bar manufacture method, utilize high strength and high conductivity rate large electric element in 6082 high strength and high conductivity rate large scale rod bar processing power equipments, be specially 6082T6 aluminium alloy and be greater than 150mm bar ~ 300mm bar.
Background technology
Along with the fast development of worldwide machinery manufacturing industry technology, new technology, new material, new technology, new product emerges in an endless stream, power equipment to the demand of high strength and high conductivity rate large electric element widely, increasing to the demand of cogging material and high strength and high conductivity rate aluminium alloy large scale rod bar, high strength and high conductivity rate large electric element is to the requirement of cogging material high strength and high conductivity rate aluminium alloy large scale rod bar, intensity must be possessed high, plasticity is good, specific strength is high, high conductivity, high-termal conductivity, corrosion resistance is good, stress-free corrosion breaks tendency, anti intercrystalline corrosion ability is strong, welding performance is good, weld zone corrosion resisting property is constant, machinability is good, be easy to the advantages such as processing, and there is good processing performance, be suitable for machining and various forms of secondary pressure machine-shaping.
In view of 6082 aluminium alloys are one of alloy that in six line aluminium alloys, composition is the most complicated, in high-temperature heating process, main intensified element improves with heating-up temperature, and Mg, Si solid solubility significantly increases, alloy has obvious quench aging strengthening effect, makes the intensity increase of 6082 alloys larger; But main intensified element content is higher, alloying element is more, therefore hardening heat narrow range, high to solution strengthening environmental requirement, must quench in 30 seconds and just can reach solid solution strengthening effect, when adding a small amount of Cu in alloy, intensity increases further, but increases for the sensitiveness of quenching, and particularly diameter is greater than 150mm bar, when the press quenching time is longer, intensity obviously reduces, and corrosion resistance declines, and therefore this kind of character alloy is applicable to out-line quenching.In view of the material feature of 6082T6 aluminium alloy, the preparation method for 6082T6 aluminium alloy large scale rod bar is not suitable for current method, therefore, is badly in need of a kind of for power equipment 6082T6 aluminium alloy large scale rod bar manufacture method.
Summary of the invention
The object of the invention is to provide batch production a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method, can effectively solve a large amount of production, delivery problems, improve intensity and the electrical conductivity of large-size aluminum alloy bar, be conducive to processing and use, the mechanical property obtained by the method and stable conductivity, through repeatedly reappearing operation, all can meet the national standard that diameter is less than 150mm, can supplement or improve diameter and be greater than 150mm ~ 300mm bar national standard, and include property indices in national standard.
Technical scheme of the present invention is:
A kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method, step is as follows: the aluminium alloy of a, casting is six line aluminium alloy circle ingot castings, and in aluminium alloy cast ingot used, the mass percent Si of element is 1.0% ~ 1.05%, Fe is≤0.12%, Cu is≤0.10%, Mn be 0.55% ~ 0.65%, Mg is 0.9% ~ 0.95%, Cr is≤0.10%, Zn is≤0.10%, Ti is≤0.05%, single impurity≤0.05%, add up to impurity≤0.15%, all the other are Al;
B, by six line aluminium alloys circle ingot casting railway carriages, crop, back-end crop, get low power, chemical composition, cut woollen, woollen homogeneous, heating-up temperature: 540-560 DEG C, be incubated more than 9 hours, the type of cooling: air-cooled and water-cooled cooling;
C, the aluminium alloy woollen of preparation is heated to 500-540 DEG C, loads recipient rapidly, 90MN or 125MN extruder carries out, extrusion speed 2.5-3.5m/min, press quenching temperature 515 ± 5 DEG C, quenching velocity 300-350 DEG C/minute;
D, the aluminium alloy large scale rod bar tension force stretching that step c is obtained, extensibility 1.0 ~ 3.0%, then timeliness: aging temp 150-170 DEG C, metal heat preservation 8-14 hour, goes out aging furnace;
E, the Physicochemical test material of timeliness being come out of the stove, the sample position that the acceptance criteria specified as agreed and drawing specify, gets physics and chemistry sample, after whole Physicochemical test detection is qualified, packs after carrying out surface inspection, dimensional gaughing, passed examination.
In described a step, the specification of aluminium alloy round cast ingot is Φ 520mm × 4000mm or specification is Φ 600mm × 4000mm.
In described b step, woollen specification is: for Φ 506mm × 1750mm or specification are Φ 582mm × 1800mm.
In described b step, air cooling to 200 DEG C adds water-cooled cooling.
In described step c, extrusion speed 3.0m/min.
During described d is rapid, extensibility is 1.5-1.7%.
The diameter obtained is greater than 150mm ~ 300mm bar product tensile strength 345-368MPa, yield strength 290-322MPa, percentage elongation 15-17.8%, Brinell hardness 100-112HB, electrical conductivity 46.3-46.89%IACS.
Beneficial effect of the present invention is:
In step a, chemical composition is within the scope of national standard, 6082 high strength and high conductivity rate large scale rod bar cast component scopes are narrowed, and casting range controls to reach the standard grade in national standard and line on the upper side, avoid crossing great fluctuation process due to chemical composition and cause that interior tissue is uneven and mechanical property scattered error is excessive; Main strengthening Composition Control in reach the standard grade and line on the upper side, mainly in order to improve the intensity of 6082 alloys, control Fe, Zn, Ti alloying component is the smaller the better, mainly in order to improve the purity of 6082 alloys, improve conductance; Add Cu element, control reaching the standard grade in standard, a small amount of Cu strengthen composition Si, Mg with mainly and is combined, and mechanical property is significantly improved, mechanical property can be made close to the performance of duralumin, Cu again can in Ti to the harmful effect of conductance; Due to the uncontrollability of Fe element in casting process, Mn control of element is being reached the standard grade, Mn participates in invigoration effect, can eliminate again Fe harmful effect and can crystal grain thinning, make 6082 alloy structures evenly, combination property improves, make 6082 alloy diameters be greater than 150mm ~ 300mm rod mechanical performance and conductivity indices to meet diameter and be less than 150mm national standard, can supplement or improve diameter and be greater than 150mm ~ 300mm bar national standard, and include property indices in national standard; According to the chemical composition of mentioned above principle preparation, large scale rod bar qualification rate is made to be stabilized in more than 93%.
In the equal fire preparing degree of step b, the type of cooling is that strong wind is cooled to 200 DEG C and adds water-cooled cooling, realize cooling fast, ensure intensified element at utmost solid solution, improve the combination property of extruded bars, and reduce the operation stand-by period more than 24 hours, enhance productivity, and the air-cooled cooling method adding water-cooled, Fe element can be reduced or eliminated to the harmful effect after fabricated product oxidation, high strength and high conductivity rate large scale rod bar is made to be processed into various electric power vigour part rear surface gloss after various oxidation or coating process attractive in appearance, without dark line, concealed wire, not only ensure serviceability but also improve aesthetical perception.
The extrusion speed of step c can ensure that outlet temperature is more than 6082 alloy quenching temperature, online Water cooling ensures quenching velocity, ensure quenching effect, guarantee mechanical property is qualified, press quenching compares with out-line quenching can reduce distortion, steps d makes extensibility between 1.5 ~ 1.7%, reduce extensibility and change the size inequality caused greatly, ensure to continue size scattered error in supply of material process little, press quenching compare with out-line quenching can reduce take the lead, hang, out-line quenching heats up, be incubated equal time, often criticize and reduce activity time more than 10 hours.
By above measure, 6082 large scale rod bar press quenchings can be realized and meet the requirement of high strength and high conductivity rate, obtained diameter is made to be greater than 150mm ~ 300mm product tensile strength 345-368MPa, yield strength 290-322MPa, percentage elongation 15-17.8%, Brinell hardness 100-112HB, electrical conductivity 46.3-46.89%IACS.
National standard requires: (1) diameter is less than the 6082T6 bar tensile strength >=310MPa of 150mm, yield strength >=260MPa, percentage elongation >=8%, Brinell hardness >=95HB, electrical conductivity >=44.83%IACS; (2) diameter is greater than the 6082T6 bar tensile strength no requirement (NR) of 150mm-300mm, yield strength no requirement (NR), percentage elongation no requirement (NR), Brinell hardness no requirement (NR), electrical conductivity >=44.83%IACS.
In a word, the aluminium alloy large scale rod bar of the high strength and high conductivity rate large electric element that the present invention obtains, possess that intensity is high, plasticity good, specific strength is high, quality is light, high conductivity, high-termal conductivity, corrosion resistance are good, stress-free corrosion breaks tendency, anti intercrystalline corrosion ability is strong, welding performance is good, weld zone corrosion resisting property is constant, machinability good, be easy to the advantages such as processing, and there is good processing performance, be suitable for machining and various forms of secondary pressure machine-shaping; The invention provides press quenching batch production power equipment high strength and high conductivity rate aluminium alloy large scale rod bar manufacture method, make production efficiency improve 15 ~ 21%.
Detailed description of the invention
Below by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1,
A. the aluminium alloy cast is six line aluminium alloy circle ingot castings, the mass percent of element in aluminium alloy cast ingot used
Si is 1.0% ~ 1.05%, Fe be≤0.12%, Cu be≤0.10%, Mn be 0.55% ~ 0.65%, Mg be 0.9% ~ 0.95%, Cr be≤0.10%, Zn be≤0.10%, Ti is≤0.05%, single impurity≤0.05%, and add up to impurity≤0.15%, all the other are Al; Ingot casting specification is Φ 520mm × 4000mm, and during melting six line aluminium alloy circle ingot casting, burdening calculation is based on the center line of step a, to guarantee that ingot casting Composition Control is in critical field; Once skim after thawing, once skim after smelting furnace refining, once skim after holding furnace refining; After smelting furnace refining, a degasification after a degasification, holding furnace refining, carries out a getter degasification after holding furnace refining again.
B, be Φ 520mm × 4000mm six line aluminium alloy circle ingot casting railway carriage by specification, crop, back-end crop, get low power, chemical composition, cut woollen, woollen specification is Φ 506mm × 1750mm; Woollen homogeneous, heating-up temperature: 550 DEG C, is incubated 10 hours, the type of cooling: air-cooledly add water-cooled cooling.
C, by preparation No. six aluminium alloy round cast ingot woollens be heated to 500 DEG C, load recipient rapidly, extrusion speed 3m/min, hardening heat 515 DEG C, quenching velocity 300 DEG C ~ 350 DEG C/minute.
D, by power equipment high strength and high conductivity rate aluminium alloy large scale rod bar tension force stretching, extensibility 1.0 ~ 2.0%, then timeliness: aging temp 170 DEG C, metal heat preservation 8 hours, goes out aging furnace.
E, the Physicochemical test material that timeliness is come out of the stove, the sample position that the acceptance criteria specified as agreed and drawing specify, get physics and chemistry sample, after whole Physicochemical test detection is qualified, the power equipment high strength and high conductivity rate aluminium alloy large scale rod bar of power equipment high strength and high conductivity rate aluminium alloy large scale rod bar surface inspection, dimensional gaughing, passed examination is packed.
Embodiment 2:
Present embodiment as different from Example 1, No. six aluminium alloy round cast ingot adopted in step a, refinement reaches the requirement of stair oxidation film, there is no metallic compound segregation, in chemical composition, Mg:Si proportioning does not follow the conventional proportional of 1.73:1, and make Si superfluous, Fe, Zn, Ti alloying component is the smaller the better, in order to improve the purity of 6082 alloys, improve conductance; Add Cu element, control reaching the standard grade in standard, mechanical property is significantly improved, Cu again can in and Ti to the harmful effect of conductance; Mn control of element is being reached the standard grade, and Mn not only participates in solution strengthening, can eliminate again Fe harmful effect and can crystal grain thinning, Si is 1.03%, Fe be 0.10%, Cu is 0.09%, Mn is 0.63%, Mg is 0.93%, Cr be 0.08%, Zn is 0.09%, Ti is 0.045%, single impurity≤0.05%, add up to impurity≤0.15%, all the other are Al; Other steps and parameter identical with embodiment 1.
Embodiment 3:
Present embodiment as different from Example 1, woollen homogeneous, heating-up temperature: 560 DEG C, be incubated more than 9 hours, the type of cooling: air-cooled to water-cooled when 200 DEG C to room temperature, low power checks oxide-film, check compound segregation, meet the requirement of stair oxidation film, other steps and parameter identical with embodiment 1.
Embodiment 4:
As different from Example 1, heating-up temperature 530 DEG C, loads recipient rapidly to present embodiment, and extruding degree of hastening 3.5m/min, ensures bar outlet temperature 520 DEG C, hardening heat 520 DEG C.Other steps and parameter identical with embodiment 1.
Embodiment 5:
Present embodiment as different from Example 1, by certain type power equipment high strength and high conductivity rate aluminium alloy large scale rod bar tension force stretching, extensibility 1.7%, then timeliness, aging temp 160 DEG C, metal heat preservation 14 hours, go out aging furnace, other steps and parameter identical with embodiment 1.
Embodiment 6:
As different from Example 1, low power checks oxide-film and compound segregation to present embodiment, other steps and parameter identical with embodiment 1.
Batch production power equipment high strength and high conductivity rate aluminium alloy large scale rod bar manufacture method provided by the invention, can make production efficiency improve 15 ~ 21%.
Claims (7)
1. a power equipment 6082T6 aluminium alloy large scale rod bar manufacture method, step is as follows: the aluminium alloy of a, casting is six line aluminium alloy circle ingot castings, and in aluminium alloy cast ingot used, the mass percent Si of element is 1.0% ~ 1.05%, Fe is≤0.12%, Cu is≤0.10%, Mn be 0.55% ~ 0.65%, Mg is 0.9% ~ 0.95%, Cr is≤0.10%, Zn is≤0.10%, Ti is≤0.05%, single impurity≤0.05%, add up to impurity≤0.15%, all the other are Al; In described a step, the specification of aluminium alloy round cast ingot is Φ 520mm × 4000mm or specification is Φ 600mm × 4000mm;
B, by six line aluminium alloys circle ingot casting railway carriages, crop, back-end crop, get low power, chemical composition, cut woollen, woollen homogeneous, heating-up temperature: 540-560 DEG C, be incubated more than 9 hours, the type of cooling: air-cooled and water-cooled cooling;
C, the aluminium alloy woollen of preparation is heated to 500-540 DEG C, loads recipient rapidly, 90MN or 125MN extruder carries out, extrusion speed 2.5-3.5m/min, press quenching temperature 515 ± 5 DEG C, quenching velocity 300-350 DEG C/minute;
D, the aluminium alloy large scale rod bar tension force stretching that step c is obtained, extensibility 1.0 ~ 3.0%, then timeliness: aging temp 150-170 DEG C, metal heat preservation 8-14 hour, goes out aging furnace;
E, the Physicochemical test material of timeliness being come out of the stove, the sample position that the acceptance criteria specified as agreed and drawing specify, gets physics and chemistry sample, after whole Physicochemical test detection is qualified, packs after carrying out surface inspection, dimensional gaughing, passed examination.
2. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, it is characterized in that, in described b step, woollen specification is: for Φ 506mm × 1750mm or specification are Φ 582mm × 1800mm.
3. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, it is characterized in that, in described b step, air cooling to 200 DEG C adds water-cooled cooling.
4. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, is characterized in that, in described step c, and extrusion speed 3.0m/min.
5. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, it is characterized in that, in described Step d, extensibility is 1.7%.
6. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, is characterized in that, in described b step, and heating-up temperature: 550 DEG C.
7. a kind of power equipment 6082T6 aluminium alloy large scale rod bar manufacture method according to claim 1, is characterized in that, the product strength 345-368MPa that obtains, yield strength 290-322MPa, percentage elongation 15-17.8%, Brinell hardness 100-112HB, electrical conductivity 46.3-46.89%IACS.
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