CN102676957A - Anti-corrosion aluminum alloy for complex heat conduction system and production method thereof - Google Patents
Anti-corrosion aluminum alloy for complex heat conduction system and production method thereof Download PDFInfo
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- CN102676957A CN102676957A CN2012100659927A CN201210065992A CN102676957A CN 102676957 A CN102676957 A CN 102676957A CN 2012100659927 A CN2012100659927 A CN 2012100659927A CN 201210065992 A CN201210065992 A CN 201210065992A CN 102676957 A CN102676957 A CN 102676957A
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Abstract
The invention discloses a production method of an anti-corrosion aluminum alloy for a complex heat conduction system. The method comprises the steps of A1, smelting and casting; A2, homogenizing cast ingots; loading the cast ingots to a heat treatment furnace; maintaining the temperature for 6-8h at 560 DEG C; discharging from the furnace, and quickly cooling the cast ingots to room temperature; A3, extruding: during flat-die extrusion, controlling temperature of the cast ingots to be 480 DEG C, heating temperature of an extrusion barrel to be 440 DEG C, die temperature to be 490 DEG C and sectional material outlet temperature during the extrusion to be about 510 DEG C; cooling the sectional material by a fan in a top and bottom forced cooling mode to be less than 200 DEG C to prevent strengthening phase from being separated out; A4, performing ageing process: loading the sectional material in an ageing furnace, performing ageing for 6h at 180 DEG C, cooling to room temperature with the furnace and then discharging the product from the furnace. The production method of the alloy is free from pollution and is low in cost; the produced aluminum sectional material has the advantages of stable heat conduction performance, high surface quality and good corrosion resistance, is suitable for commercial production and can replace prior normal heat-conducting aluminum alloy material.
Description
Technical field
The present invention relates to the duraluminum production technology, in particular a kind of anticorodal and working method thereof that is used for complicated thermal conductivity.
Background technology
The Al-Mg-Si line aluminium alloy has good thermoplastic, ideal comprehensive mechanical performance, and carries out surface treatment easily, thereby is widely used in manufacture section bar, building trade section bar and electronic radiation equipment.Different according to its applied environment, the performance requriements of material there is very big difference, for example be used for the high-end product of electronics base station heat-removal system, often to pass through complicated nickel plating, zinc-plated processing, this surface property to material is had relatively high expectations.Find in the production that after many aluminium section bars were handled through coating, a lot of black patchess appearred in the surface; The coating at (2 months) spot place begins to peel off subsequently; Large-area corrosion default has appearred in the section bar surface, has had a strong impact on surface quality of products, causes its radiating effect to descend.Owing to will pass through a lot of middle-chains (like alkali erosion, pickling, zinc-plated etc.) before this type plating on aluminium alloy; Material environment of living in is very abominable; In order rationally to improve the weave construction of aluminium section bar; Obtain good corrosion resisting property, be necessary to research and develop a kind of high-performance heat conduction aluminum alloy materials, to adapt to the market requirement of current high-end product.
Summary of the invention
Technical problem to be solved by this invention is: the deficiency to prior art provides a kind of anticorodal and working method thereof that is used for complicated thermal conductivity.
Technical scheme of the present invention is following:
A kind of working method that is used for the anticorodal of complicated thermal conductivity may further comprise the steps:
A1, melting and casting: be incubated 30 minutes to fine aluminium, aluminium silicon master alloy after the fusing fully at 760 ℃; Carry out the refining slag making first time; Add pure magnesium, Al-5Ti-B fining agent and mishmetal then, evenly stir, carry out the refining second time; Be warmed up at 750 ℃ and carry out leaving standstill insulation in 15 minutes, be cast into circular ingot casting at last;
A2, homogenizing cast ingot: the ingot casting heat treatment furnace of packing into, 560 ℃ of insulations 6 to 8 hours, the back of coming out of the stove adopted quick cooling system to room temperature;
A3, extruding: in the flat-die extruding, the temperature of ingot casting is 480 ℃, and the container temperature is controlled at 440 ℃, and die temperature is controlled at 490 ℃, and extrusion process medium section temperature out is controlled at about 510 ℃; Section bar will adopt blower fan to force cooling up and down, makes it to be cooled fast to below 200 ℃, in order to avoid strengthening phase is separated out;
A4, aging technique system: carry out the thermal treatment of 180 ℃ * 6h timeliness to the section bar aging oven of packing into, furnace cooling is come out of the stove after room temperature.
Described working method; In the said steps A 1, siliceous amount degree is 0.383% in the ingot casting, and magnesia amount degree is 0.596%; The Al-5Ti-B add-on is 3 kilograms in the alloy material per ton; Mishmetal adopts the form of aluminium intermediate alloy to add, and add-on is controlled at 0.25%, and refining agent and insulating covering agent are by 3 kilograms of addings of alloy material per ton; Refining agent adds when the refining slag making first time and refining for the second time, and insulating covering agent adds after the refining second time;
The production of this alloy is pollution-free, cost is low, and the aluminium section bar heat conductivility of being produced is stable, surface quality is high, corrosion resisting property good, is suitable for suitability for industrialized production, alternative existing common heat conduction aluminum alloy materials.
Description of drawings
Fig. 1 is the SEM picture of alloy casting state tissue before and after bakingout process (homogenizing processing), before 1-1 is homogenizing, after 1-2 is homogenizing.
Embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
One melting and casting technique (ingot production)
Be incubated 30 minutes to fine aluminium, aluminium silicon master alloy after the fusing fully at 760 ℃; Carry out the refining slag making first time; Add pure magnesium, Al-5Ti-B fining agent and mishmetal then, evenly stir, carry out the refining second time; Be warmed up at 750 ℃ and carry out leaving standstill insulation in 15 minutes, be cast into circular ingot casting at last.
Silicone content is 0.383% (mass percent in the ingot casting; Down together); Mg content is 0.596%, and the Al-5Ti-B add-on is 3 kilograms in the alloy material per ton, and mishmetal adopts the form of aluminium intermediate alloy to add; Content is controlled at about 0.25%, and refining agent and insulating covering agent are by 3 kilograms of addings of alloy material per ton; Refining agent adds when the refining slag making first time and refining for the second time, and insulating covering agent adds after the refining second time, and refining agent and insulating covering agent adopt commercially available conventional refining agent and insulating covering agent.
Fine aluminium, the no oil stain in aluminium silicon master alloy surface, moisture and oxide debris (, should take measures in time to handle) as there being above-mentioned phenomenon, wherein the silicone content of aluminium silicon master alloy requires within the 10-15% scope;
Refining agent and insulating covering agent must be taked drying step before adding, desirable 150 ℃ of drying temperature, and should be no less than 2 hours time of drying; Must be even when adopting hand mixing, do not stay the dead angle in the smelting zone;
Do not want its surface scale of artificial destruction in the ingot casting casting cycle,, use filter net system during casting, and before casting, will in time dry fluid groove in order to avoid bring introduced contaminants and extra oxide components into.
Two homogenizing cast ingot
Will suitably excise (resection length is at 60-80mm) to two head part of ingot casting before the ingot homogenization, then the ingot casting heat treatment furnace of packing into, 560 ℃ of insulations 6 to 8 hours, the back of coming out of the stove adopted quick cooling system to room temperature.
After the ingot casting shove charge, the beginning heat-up rate is unsuitable too fast, in order to avoid the local burning of ingot casting produces the even phenomenon of tissue odds; Fast can adopt forced air cooling during cooling, guarantee ingot casting after the homogenizing at 50-70 minute scope internal cooling to room temperature, air-cooledly after 230 ℃, can adopt atomized water spray to force the type of cooling.
Three extrusion processes
In the flat-die extruding, the temperature of ingot casting is 480 ℃, and the container heating and temperature control is at 440 ℃, and die temperature is controlled at 490 ℃, and extrusion process medium section temperature out is controlled at about 510 ℃; Section bar will adopt blower fan to force cooling up and down, makes it to be cooled fast to below 200 ℃, in order to avoid strengthening phase is separated out.
Ingot casting Heating temperature in the extrusion process, container Heating temperature, mold heated temperature (being commonly called as " three temperature ") are directed to plane mould extruding, strictly observe; Under the prerequisite of section bar velocity of discharge greater than 30m/min; Suitable control speed speed; With the temperature out (the section bar temperature out was low when extrusion speed was slow for available extrusion speed speed control, section bar temperature out height when extrusion speed is fast) about 510 ℃ that guarantees section bar.
, extruded section occurs upwarping or when having a downwarp when exporting; Can adopt the method for adjustment blower fan wind speed to control, concrete operation method is: when the outlet material upwarps, suitably transfer big top wind speed (or reducing the below wind speed); When the outlet material has a downwarp, suitably transfer big below wind speed (or reducing the top wind speed).
Four aging technique systems
Carry out the thermal treatment of 180 ℃ * 6h timeliness to the section bar aging oven of packing into, furnace cooling is come out of the stove after room temperature.
For the section bar after the extruding, the storage period before the timeliness does not surpass 5 hours (T5 state section bar, Geng Jia about 2 hours storage periods; Aging temp and time can not vary, in strict accordance with 180 ℃ * 6h institution of prescription.
The contrast of five experimental datas
Following chart is listed the experimental data contrast of this alloy and common aluminum alloy.
As shown in Figure 1,1-1 is the SEM picture of alloy casting state tissue before the homogenizing, and 1-2 is the SEM picture of alloy casting state tissue after the homogenizing, can find out through after the homogenizing processing segregation basically eliminate of crystal boundary and intracrystalline, strengthening phase Mg
2Si evenly dissolves in the aluminum substrate, and uneven eutectic structure disappears.
Table 1 heat treating regime contrasts the data that influence of aluminium alloy extrusions corrosive nature
Experimental data shows: it is better to adopt homogenizing to handle the alloy material corrosion resisting property that fast cold mode obtains.
Table 2 section bar extrusion process contrasts the data that influence of alloy corrosive nature
Data show: temperature out is better 510 ℃ of section bar corrosion resisting properties that adopt fast cold mode to obtain.
Should be noted that concerning those of ordinary skills, can improve technology or transformation parameter, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (3)
1. working method that is used for the anticorodal of complicated thermal conductivity may further comprise the steps:
A1, melting and casting: be incubated 30 minutes to fine aluminium, aluminium silicon master alloy after the fusing fully at 760 ℃; Carry out the refining slag making first time; Add pure magnesium, Al-5Ti-B fining agent and mishmetal then, evenly stir, carry out the refining second time; Be warmed up at 750 ℃ and carry out leaving standstill insulation in 15 minutes, be cast into circular ingot casting at last;
A2, homogenizing cast ingot: the ingot casting heat treatment furnace of packing into, 560 ℃ of insulations 6 to 8 hours, the back of coming out of the stove adopted quick cooling system to room temperature;
A3, extruding: in the flat-die extruding, the temperature of ingot casting is 480 ℃, and the container temperature is controlled at 440 ℃, and die temperature is controlled at 490 ℃, and extrusion process medium section temperature out is controlled at about 510 ℃; Section bar will adopt blower fan to force cooling up and down, makes it to be cooled fast to below 200 ℃, in order to avoid strengthening phase is separated out;
A4, aging technique system: carry out the thermal treatment of 180 ℃ * 6h timeliness to the section bar aging oven of packing into, furnace cooling is come out of the stove after room temperature.
2. working method according to claim 1; It is characterized in that: in the said steps A 1, siliceous amount degree is 0.383% in the ingot casting, and magnesia amount degree is 0.596%; The Al-5Ti-B add-on is 3 kilograms in the alloy material per ton; Mishmetal adopts the form of aluminium intermediate alloy to add, and add-on is controlled at 0.25%, and refining agent and insulating covering agent are by 3 kilograms of addings of alloy material per ton.
3. the high-performance anticorodal that is used for complicated thermal conductivity of working method preparation according to claim 1 and 2.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735831A (en) * | 2016-03-14 | 2016-07-06 | 常熟市港城不锈钢装饰有限责任公司 | Material for thermal-insulating aluminum alloy doors and windows and manufacturing method thereof |
| CN109022960A (en) * | 2018-09-21 | 2018-12-18 | 广西大学 | A kind of thermally conductive aluminium alloy and its preparation method and application |
| CN110343915A (en) * | 2019-06-25 | 2019-10-18 | 广东伟业铝厂集团有限公司 | A kind of aluminum alloy materials and preparation method thereof, the radiator of high intensity high thermal conductivity |
| CN114752824A (en) * | 2022-06-02 | 2022-07-15 | 山东南山铝业股份有限公司 | Rapid extrusion aluminum alloy profile with low rare earth content and preparation process thereof |
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| CN1936052A (en) * | 2006-10-18 | 2007-03-28 | 东华大学 | Aluminium-silicon alloy casting and its preparing method |
| CN101928863A (en) * | 2009-06-19 | 2010-12-29 | 深圳华加日铝业有限公司 | Aluminum alloy material capable of being molded by high-speed extrusion and preparation method thereof |
| US20110192503A1 (en) * | 2010-02-05 | 2011-08-11 | Sun Xing Chemical & Metallurgical Materials (Shenzhen) Co., Ltd. | Method for controlling variations of al-ti-c alloy grain refinement ability through controlling compression ratio |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1936052A (en) * | 2006-10-18 | 2007-03-28 | 东华大学 | Aluminium-silicon alloy casting and its preparing method |
| CN101928863A (en) * | 2009-06-19 | 2010-12-29 | 深圳华加日铝业有限公司 | Aluminum alloy material capable of being molded by high-speed extrusion and preparation method thereof |
| US20110192503A1 (en) * | 2010-02-05 | 2011-08-11 | Sun Xing Chemical & Metallurgical Materials (Shenzhen) Co., Ltd. | Method for controlling variations of al-ti-c alloy grain refinement ability through controlling compression ratio |
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| 钟建华等: "提高铝合金导热性能的研究", 《铸造技术》, vol. 24, no. 6, 30 November 2003 (2003-11-30), pages 549 - 550 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735831A (en) * | 2016-03-14 | 2016-07-06 | 常熟市港城不锈钢装饰有限责任公司 | Material for thermal-insulating aluminum alloy doors and windows and manufacturing method thereof |
| CN109022960A (en) * | 2018-09-21 | 2018-12-18 | 广西大学 | A kind of thermally conductive aluminium alloy and its preparation method and application |
| CN110343915A (en) * | 2019-06-25 | 2019-10-18 | 广东伟业铝厂集团有限公司 | A kind of aluminum alloy materials and preparation method thereof, the radiator of high intensity high thermal conductivity |
| CN110343915B (en) * | 2019-06-25 | 2020-12-11 | 广东伟业铝厂集团有限公司 | High-strength high-thermal-conductivity aluminum alloy material, preparation method thereof and radiator |
| CN114752824A (en) * | 2022-06-02 | 2022-07-15 | 山东南山铝业股份有限公司 | Rapid extrusion aluminum alloy profile with low rare earth content and preparation process thereof |
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