CN113025855A - High heat dissipation type alloy material motor casing - Google Patents
High heat dissipation type alloy material motor casing Download PDFInfo
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- CN113025855A CN113025855A CN202110241260.8A CN202110241260A CN113025855A CN 113025855 A CN113025855 A CN 113025855A CN 202110241260 A CN202110241260 A CN 202110241260A CN 113025855 A CN113025855 A CN 113025855A
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- 239000000956 alloy Substances 0.000 title claims abstract description 35
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 20
- 239000000243 solution Substances 0.000 claims description 27
- 229910000838 Al alloy Inorganic materials 0.000 claims description 26
- 238000005498 polishing Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 23
- 238000007670 refining Methods 0.000 claims description 21
- 230000032683 aging Effects 0.000 claims description 19
- 239000002893 slag Substances 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 14
- 238000012986 modification Methods 0.000 claims description 14
- 230000004048 modification Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000007872 degassing Methods 0.000 claims description 11
- 238000006011 modification reaction Methods 0.000 claims description 11
- 239000006104 solid solution Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 238000004381 surface treatment Methods 0.000 claims description 9
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 7
- 229910018138 Al-Y Inorganic materials 0.000 claims description 6
- 229910000858 La alloy Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 229910003243 Na2SiO3·9H2O Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 abstract description 15
- 239000003795 chemical substances by application Substances 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000011049 filling Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a high heat dissipation type alloy material motor shell which comprises, by mass, 0.06-0.12% of Cu0.06-0.12%, 7.2-7.4% of Si7.55-0.75% of Fe0.2-0.3% of Mg0.05-0.07%, 0.005-0.012% of Cr0.005-0.012%, 0.02-0.04% of Ti0.08-0.13% of Mn0.08-0.13% of Ni0.2-0.3% of Ge0.08-0.12% of C0.001-0.006% of La0.03-0.06%, 0.05-0.08% of Ce0.05% of Y0.03-0.05% of Sr0.04-0.07% of aluminum, and the balance of aluminum.
Description
Technical Field
The invention relates to the technical field of vehicle motor preparation, in particular to a high-heat-dissipation alloy motor shell.
Background
At present, domestic motors are mostly prepared from cast aluminum alloy, such as 6603 type aluminum alloy, A356 type aluminum alloy and the like, for example 6603 aluminum alloy, it has the advantages of excellent processing performance, excellent weldability, toughness, plasticity and the like, and besides the application in the motor shell, the application range is wide in the fields of building doors and windows, curtain walls, industrial structures and the like, but the defects exist in the prior art, the structural strength of the aluminum alloy can not meet the modern requirements, and various improvements are carried out on the 6603 type aluminum alloy on the market, such as adjusting the component range, or a plurality of other elements are added, the improvement brings about the improvement of the performance of the 6603 aluminum alloy part, but greatly reduces the heat dissipation performance, in this regard, the market has generally focused on improvements in construction, such as forming heat fins around the housing, or heat dissipation through holes, etc., but such structures are liable to damage the structural strength of the housing, and there is a strong need to develop other ways to improve the heat dissipation capability of the housing.
Disclosure of Invention
In order to solve at least one technical defect, the invention provides the following technical scheme:
a high heat dissipation type alloy material motor casing comprises, by mass, 0.06-0.12% of Cu0.06-0.12%, 7.2-7.4% of Si7.55-0.75% of Fe0.2-0.3% of Mg0.05-0.07%, 0.005-0.012% of Cr0.005, 0.02-0.04% of Ti0.08-0.13% of Mn0.2-0.3% of Ni0.2-0.3% of Ge0.08-0.12%, 0.001-0.006% of C, 0.03-0.06% of La0.05-0.08% of Ce0.05% of Y, 0.04-0.07% of Sr0.04-0.07% and the balance of aluminum.
This casing mainly improves the aluminum alloy composition, adds multiple element on 6603 aluminum alloy's basis, obtains the casing of above-mentioned component after the process of investigation and a large amount of experiments makeing out frustratingly to rare earth element lanthanum, cerium, yttrium, strontium element and all the other element component cooperation make the casing possess high heat dissipating and comprehensive properties, improve motor casing's radiating efficiency.
Meanwhile, aiming at the change of the element components, the preparation method is developed in a matching way, and comprises the following steps:
step 1, adding the prepared furnace burden into an intermediate frequency furnace, heating and melting, and removing slag;
step 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment;
step 3, refining the aluminum alloy liquid after modification treatment at the temperature of 710-;
step 4, performing low-pressure casting on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank;
step 5, carrying out solid solution aging treatment on the shell blank;
and 6, performing surface treatment on the blank after the solution and aging treatment.
The rare earth elements are added in the form of alloy, and the blank can be obtained through modification reaction, refining and low-pressure casting, so that the casting difficulty is reduced, and the quality is improved through solution aging treatment and surface treatment.
Furthermore, in the step 1, the prepared burden does not contain La, Ce, Y, Sr and C element components, and the prepared burden contains 1/2 of Ti element components.
Further, in the step 1, a sodium-free slag remover is used for removing slag at the temperature of 710-740 ℃.
Further, the modification reaction temperature in the step 2 is 720-740 ℃ for 5-10 min.
Further, the solution aging treatment is two-stage treatment, wherein the first stage treatment is carried out at the temperature of 520-.
Further, the surface treatment comprises sand removal and polishing, and the polishing solution used for polishing comprises NaOH and NaH2PO4、NaF、Na2SiO3·9H2O、CH4N2S、NaNO3And water, which is polished by alkaline polishing solution, is helpful for corrosion resistance and leveling, and improves the corrosion resistance and the brightness.
Further, the mass concentration of NaOH in the polishing solution is 100-300g/L, NaH2PO460-80g/L、NaF30-50g/L、Na2SiO3·9H2O15-25g/L、CH4N2S12-15g/L、NaNO3100-180g/L。
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, on the basis of 6603 aluminum alloy, multiple elements are added, the component proportion is greatly adjusted, the forming process is correspondingly improved, and the heat dissipation performance and the comprehensive performance of the shell are improved.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The preparation method of the high heat dissipation type motor shell comprises the following steps:
step 1, adding weighed Cu0.06%, Si7.2%, Fe0.55%, Mg0.2%, Zn0.05%, Cr0.005%, Ti0.01%, Mn0.08%, Ni0.2%, Ge0.08%, aluminum and the like into an intermediate frequency furnace according to the proportion, heating and melting, and in addition, adding the components in the form of alloy, forming a master alloy by a plurality of components, or adding the components in the form of simple substance, adding a sodium-free slag remover, stirring and removing slag, wherein the temperature is 710 ℃ and 720 ℃, and the slag remover accounts for 0.12% of aluminum by mass.
And 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment, wherein the modification reaction temperature is 720-730 ℃, the modification reaction time is 5min, and the Ti content in the step 1 and the step 2 is the same.
And 3, filtering the aluminum alloy liquid after modification treatment, refining, wherein the refining agent is a sodium-free refining agent, the using amount of the sodium-free refining agent is 0.15 percent of the mass of aluminum, the temperature is 710-DEG C and 720 ℃ for 20min, transferring the aluminum alloy liquid into a heat preservation furnace after refining is finished, standing the aluminum alloy liquid at the temperature of 650-DEG C and 660 ℃ for 10min, degassing, and the degassing treatment operation is as follows: introducing high-purity argon, starting a graphite rotor, controlling the rotating speed of 560 and 580r/min, and keeping the time for 7 min;
and 4, carrying out low-pressure pouring on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank, wherein parameters of a pneumatic casting machine are set to 430bar of suspension pressure, 460bar of liquid rising pressure, 13s of liquid rising time, 590bar of mold filling pressure, 8s of mold filling time, 680bar of pressurizing pressure, 2s of pressurizing time, 220s of pressure maintaining time, 4bar of compensating pressure and 170s of cooling time.
And step 5, carrying out solid solution aging treatment on the shell blank, wherein the solid solution aging treatment is carried out in two stages, the first stage treatment is carried out at the temperature of 520-fold sand-crushing temperature of 530 ℃ for 10h, and the second stage treatment is carried out at the temperature of 200-fold sand-crushing temperature of 210 ℃ for 2 h.
Step 6, performing surface treatment on the blank after the solution aging treatment, including surface sand removal and polishing, wherein the polishing solution is a water level solvent, and the concentration of each component is NaOH100g/L, NaH2PO460g/L、NaF30g/L、Na2SiO3·9H2O15g/L、CH4N2S12g/L、NaNO3100g/L, the operation process comprises the steps of firstly removing sand on the surface, and then immersing the surface into polishing solution for polishing, whereinAnd (5) for 15 seconds at the temperature of over 90 ℃, cleaning with clear water, neutralizing with a nitric acid solution, washing with water again, and drying.
Example 2
The preparation method of the high heat dissipation type motor shell comprises the following steps:
step 1, adding weighed Cu0.10%, Si7.3%, Fe0.65%, Mg0.25%, Zn0.06%, Cr0.008%, Ti0.015%, Mn0.10%, Ni0.25%, Ge0.10%, aluminum and the like into an intermediate frequency furnace according to the proportion, heating and melting, and in addition, adding the components in the form of alloy, forming a master alloy by a plurality of components, or adding the components in the form of simple substance, adding a sodium-free slag remover, stirring and removing slag at the temperature of 720 ℃ and 730 ℃, wherein the slag remover accounts for 0.13% of aluminum by mass.
And 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment, wherein the modification reaction temperature is 730 ℃ and 740 ℃, the modification reaction time is 8min, and the Ti content in the step 1 and the step 2 is the same.
And 3, filtering the aluminum alloy liquid after modification treatment, refining, wherein the refining agent is a sodium-free refining agent, the using amount of the sodium-free refining agent is 0.14 percent of the mass of aluminum, the temperature is 720-plus 730 ℃, the time is 30min, transferring the aluminum alloy liquid into a heat preservation furnace after refining is finished, standing the aluminum alloy liquid for 20min at the temperature of 660-plus 670 ℃, degassing, and performing degassing treatment, wherein the degassing treatment operation is as follows: introducing high-purity argon, starting a graphite rotor, controlling the rotating speed of 560 and 580r/min, and keeping the time for 8 min;
and 4, carrying out low-pressure pouring on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank, wherein parameters of a pneumatic casting machine are set to 430bar of suspension pressure, 460bar of liquid rising pressure, 13s of liquid rising time, 590bar of mold filling pressure, 8s of mold filling time, 680bar of pressurizing pressure, 2s of pressurizing time, 220s of pressure maintaining time, 4bar of compensating pressure and 170s of cooling time.
And step 5, carrying out solid solution aging treatment on the shell blank, wherein the solid solution aging treatment is carried out in two stages, the first stage treatment is carried out at the temperature of 520-fold sand-crushing temperature of 530 ℃ for 12h, and the second stage treatment is carried out at the temperature of 200-fold sand-crushing temperature of 210 ℃ for 3 h.
Step 6, performing surface treatment on the blank after the solution aging treatment, including surface sand removal and polishing, wherein the polishing solution is in water levelSolvent, wherein the concentration of each component is NaOH200g/L, NaH2PO470g/L、NaF40g/L、Na2SiO3·9H2O20g/L、CH4N2S14g/L、NaNO3140g/L, and the operation flow comprises the steps of firstly removing sand on the surface, then immersing the surface into polishing solution for polishing for 15s at the temperature of more than 90 ℃, then cleaning with clean water, neutralizing with nitric acid solution, washing with water again, and finishing after drying.
Example 3
The preparation method of the high heat dissipation type motor shell comprises the following steps:
step 1, adding weighed Cu0.12%, Si7.4%, Fe0.75%, Mg0.3%, Zn0.07%, Cr0.012%, Ti0.02%, Mn0.13%, Ni0.3%, Ge0.12%, aluminum and the like into an intermediate frequency furnace according to the proportion, heating and melting, and in addition, adding the components in the form of alloy, forming a master alloy by a plurality of components, or adding the components in the form of simple substance, adding a sodium-free slag remover, stirring and removing slag, wherein the temperature is 730-740 ℃, and the slag remover accounts for 0.15% of aluminum by mass.
And 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment, wherein the modification reaction temperature is 730 ℃ and 740 ℃, the modification reaction time is 10min, and the Ti content in the step 1 and the step 2 is the same.
And 3, filtering the aluminum alloy liquid after modification treatment, refining, wherein the refining agent is a sodium-free refining agent, the using amount of the sodium-free refining agent is 0.15 percent of the mass of aluminum, the temperature is 710-: introducing high-purity argon, starting a graphite rotor, controlling the rotating speed of 560 and 580r/min, and keeping the time for 7 min;
and 4, carrying out low-pressure pouring on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank, wherein parameters of a pneumatic casting machine are set to 430bar of suspension pressure, 460bar of liquid rising pressure, 13s of liquid rising time, 590bar of mold filling pressure, 8s of mold filling time, 680bar of pressurizing pressure, 2s of pressurizing time, 220s of pressure maintaining time, 4bar of compensating pressure and 170s of cooling time.
And step 5, carrying out solid solution aging treatment on the shell blank, wherein the solid solution aging treatment is carried out in two stages, the first stage treatment is carried out at the temperature of 520-fold sand-crushing temperature of 530 ℃ for 13h, and the second stage treatment is carried out at the temperature of 200-fold sand-crushing temperature of 210 ℃ for 4 h.
Step 6, performing surface treatment on the blank after the solution aging treatment, including surface sand removal and polishing, wherein the polishing solution is a water level solvent, and the concentration of each component is NaOH300g/L, NaH2PO480g/L、NaF50g/L、Na2SiO3·9H2O25g/L、CH4N2S15g/L、NaNO3180g/L, and the operation flow comprises the steps of firstly removing sand on the surface, then immersing the surface into polishing solution for polishing for 15s at the temperature of more than 90 ℃, then cleaning with clear water, neutralizing with nitric acid solution, washing with water again, and finishing after drying.
Comparative example 1
The preparation method of the high heat dissipation type motor shell comprises the following steps:
step 1, adding weighed Cu0.06%, Si7.0%, Fe0.55%, Mg0.2%, Zn0.05%, Cr0.005%, Ti0.01%, Mn0.08%, Ni0.2%, Ge0.08%, aluminum and the like into an intermediate frequency furnace according to the proportion, heating and melting, and in addition, adding the components in the form of alloy, forming a master alloy by a plurality of components, or adding the components in the form of simple substance, adding a sodium-free slag remover, stirring and removing slag, wherein the temperature is 710 ℃ and 720 ℃, and the slag remover accounts for 0.12% of aluminum by mass.
And 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment, wherein the modification reaction temperature is 720-730 ℃, the modification reaction time is 5min, and the Ti content in the step 1 and the step 2 is the same.
And 3, filtering the aluminum alloy liquid after modification treatment, refining, wherein the refining agent is a sodium-free refining agent, the using amount of the sodium-free refining agent is 0.15 percent of the mass of aluminum, the temperature is 710-: introducing high-purity argon, starting a graphite rotor, controlling the rotating speed of 560 and 580r/min, and keeping the time for 7 min;
and 4, carrying out low-pressure pouring on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank, wherein parameters of a pneumatic casting machine are set to 430bar of suspension pressure, 460bar of liquid rising pressure, 13s of liquid rising time, 590bar of mold filling pressure, 8s of mold filling time, 680bar of pressurizing pressure, 2s of pressurizing time, 220s of pressure maintaining time, 4bar of compensating pressure and 170s of cooling time.
And step 5, carrying out solid solution aging treatment on the shell blank, wherein the solid solution aging treatment is carried out in two stages, the first stage treatment is carried out at the temperature of 520-fold sand-crushing temperature of 530 ℃ for 10h, and the second stage treatment is carried out at the temperature of 200-fold sand-crushing temperature of 210 ℃ for 2 h.
Step 6, performing surface treatment on the blank after the solution aging treatment, including surface sand removal and polishing, wherein the polishing solution is a water level solvent, and the concentration of each component is NaOH100g/L, NaH2PO460g/L、NaF30g/L、Na2SiO3·9H2O15g/L、CH4N2S12g/L、NaNO3100g/L, the operation flow is that firstly the surface is cleaned, then the surface is immersed into polishing solution for polishing for 15s at the temperature of more than 90 ℃, then the surface is cleaned by clean water, neutralized by nitric acid solution, washed by water again, and dried, and the operation is finished.
Comparative example 1 compared to example 1, the Si content was 7.0%, and the rest remained the same as example 1.
The housing prepared in the above examples and comparative examples were tested for properties including tensile strength, hardness and thermal conductivity according to national standards, as shown in the following table.
Wherein, in the heat conductivity detection, the thickness of the shell is 6.22 mm.
As can be seen from the table, the novel components and the shell prepared by the novel process in the scheme have the advantages of good comprehensive performance, good heat conductivity, high hardness and excellent performance, and meanwhile, as can be seen from the appearance, compared with the shell before modification, the shell has high brightness, and the corrosion resistance is found to be strong in subsequent tests.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a high heat dissipation type alloy material motor casing which characterized in that: by mass, the alloy comprises 0.06-0.12% of Cu0.06-0.12%, 7.2-7.4% of Si0.55-0.75% of Fe0.2-0.3%, 0.05-0.07% of Mg0.2-0.3%, 0.05-0.07% of Zn0.005-0.012%, 0.02-0.04% of Ti0.02-0.04% of Mn0.08-0.13%, 0.2-0.3% of Ni0.08-0.12% of Ge0.001-0.006% of C, 0.03-0.06% of La0.05-0.08% of Ce0.05-0.08%, 0.03-0.05% of Y, 0.04-0.07% of.
2. The motor casing made of high heat dissipation type alloy material as claimed in claim 1, wherein: the preparation method comprises
Step 1, adding the prepared furnace burden into an intermediate frequency furnace, heating and melting, and removing slag;
step 2, adding Al-Ti-C-La alloy, Al-Sr intermediate alloy and Al-Y intermediate alloy for modification treatment;
step 3, refining the aluminum alloy liquid after modification treatment at the temperature of 710-;
step 4, performing low-pressure casting on the aluminum alloy liquid subjected to degassing treatment through a low-pressure casting process to obtain a shell blank;
step 5, carrying out solid solution aging treatment on the shell blank;
and 6, performing surface treatment on the blank after the solution and aging treatment.
3. The motor casing made of high heat dissipation type alloy material as claimed in claim 2, wherein: in the step 1, the prepared furnace burden does not comprise La, Ce, Y and C element components, and comprises 1/2 of Ti element components.
4. The motor casing made of high heat dissipation type alloy material as claimed in claim 2, wherein: in the step 1, a sodium-free slag remover is used for removing slag at the temperature of 710-.
5. The motor casing made of high heat dissipation type alloy material as claimed in claim 2, wherein: in the step 2, the modification reaction temperature is 720-740 ℃, and the time is 5-10 min.
6. The motor casing made of high heat dissipation type alloy material as claimed in claim 2, wherein: the solution aging treatment is two-stage treatment, the first stage treatment is carried out at the temperature of 520-.
7. The motor casing made of high heat dissipation type alloy material as claimed in claim 2, wherein: the surface treatment comprises sand removal and polishing, and the polishing solution used for polishing comprises NaOH and NaH2PO4、NaF、Na2SiO3·9H2O、CH4N2S、NaNO3And water.
8. The motor casing made of high heat dissipation type alloy material according to claim 7, wherein: 100-300g/L, NaH g of NaOH in the polishing solution by mass concentration2PO460-80g/L、NaF30-50g/L、Na2SiO3·9H2O15-25g/L、CH4N2S12-15g/L、NaNO3100-180g/L。
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