CN112030046A - Aluminum alloy material for manufacturing mobile phone frame - Google Patents
Aluminum alloy material for manufacturing mobile phone frame Download PDFInfo
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- CN112030046A CN112030046A CN202010782372.XA CN202010782372A CN112030046A CN 112030046 A CN112030046 A CN 112030046A CN 202010782372 A CN202010782372 A CN 202010782372A CN 112030046 A CN112030046 A CN 112030046A
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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
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Abstract
The invention provides an aluminum alloy material for manufacturing a mobile phone frame, which enables the processed mobile phone frame to be suitable for subsequent process operation according to the characteristics of the mobile phone frame, improves the finished product yield of the mobile phone frame, and ensures the quality of a mobile phone. The material is characterized by comprising the following components in percentage by mass: silicon Si: 0.6-0.8 wt%; fe: less than or equal to 0.15 wt%; copper Cu: 0.6-0.75 wt%; manganese Mn: 0.1-0.2 wt%; magnesium Mg: 0.8-1.0 wt%; chromium Cr: less than or equal to 0.02wt percent; zinc Zn: less than or equal to 0.02wt percent; titanium Ti: less than or equal to 0.03 wt%; the rest is aluminum; the mass percentages of all the components are added to be 100 percent.
Description
Technical Field
The invention relates to the technical field of mobile phone frame materials, in particular to an aluminum alloy material for manufacturing a mobile phone frame.
Background
With the development of smart phones, the frame of the existing mobile phone structure is gradually designed into an integrated structure, namely a mobile phone frame structure. The mobile phone frame structure is generally made of aluminum alloy, the existing mobile phone frame structure is formed by directly die-casting an aluminum ingot, the existing aluminum alloy is formed by die-casting, the surface of the existing aluminum alloy forms a bright color, the existing aluminum alloy cannot be effectively processed in the later processing process, and then flaws can appear on the surface of the existing aluminum alloy.
Disclosure of Invention
In order to solve the problems, the invention provides an aluminum alloy material for manufacturing a mobile phone frame, which enables the processed mobile phone frame to be suitable for subsequent process operation according to the characteristics of the mobile phone frame, improves the finished product yield of the mobile phone frame, and ensures the quality of a mobile phone.
The aluminum alloy material for manufacturing the mobile phone frame is characterized in that the aluminum alloy material comprises the following components in percentage by mass:
silicon Si: 0.6-0.8 wt%;
fe: less than or equal to 0.15 wt%;
copper Cu: 0.6-0.75 wt%;
manganese Mn: 0.1-0.2 wt%;
magnesium Mg: 0.8-1.0 wt%;
chromium Cr: less than or equal to 0.02wt percent;
zinc Zn: less than or equal to 0.02wt percent;
titanium Ti: less than or equal to 0.03 wt%;
the rest is aluminum; the mass percentages of all the components are added to be 100 percent.
A manufacturing process of an aluminum alloy material for manufacturing a mobile phone frame is characterized by comprising the following steps of: preparing aluminum liquid in advance according to the component proportion of the aluminum alloy material, and ensuring that the main components of the aluminum liquid are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum; then introducing the high-efficiency powder spraying refining agent into a melt in a heat preservation furnace filled with molten aluminum for refining, and adjusting the internal composition ratio of the molten aluminum to be silicon Si after slagging off: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03 wt% and the balance of aluminum, then refining outside the furnace and deslagging to obtain clean aluminum liquid, casting the clean aluminum liquid, and then straightening and cooling the cast blank, and then continuously rolling to form an aluminum rod.
It is further characterized in that:
the preparation method comprises the following specific steps:
1) raw material selection and smelting: inspecting raw materials, selecting aluminum ingots with corresponding grades for reasonable matching, putting the aluminum ingots into an aluminum melting furnace for melting, and controlling the temperature of aluminum liquid in the furnace to be less than or equal to 760 ℃;
2) and (3) analyzing the components of the aluminum liquid: transferring the smelted aluminum liquid or the electrolytic primary aluminum liquid into a heat preservation furnace, uniformly stirring, sampling, rapidly analyzing by using a direct-reading spectrometer, and detecting the contents of Si, Fe, Cu, Mn, Mg, Cr, Zn and Ti in the solution;
3) alloying treatment: according to the spectrum inspection result in the step 2, calculating the addition amount of the corresponding intermediate alloy, controlling the temperature of the aluminum liquid in the holding furnace to be 740 +/-10 ℃, adding the corresponding intermediate alloy, and stirring to ensure that the components of the aluminum liquid are fully and uniformly distributed, wherein the main components of the aluminum liquid comprise: silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
4) refining: after the step 3 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, 99.999 percent of high-purity nitrogen is used as a carrier, the high-efficiency powder spraying refining agent is introduced into a melt in a heat preservation furnace for refining, the purification treatment of degassing and removing impurities of the aluminum liquid is achieved, and the blowing speed of the refining agent and the pressure of the nitrogen are controlled during refining;
5) slagging off: after the step 4 is finished, cleaning aluminum slag floating on the surface of the aluminum liquid;
6) and (3) adjusting components, namely standing the aluminum liquid obtained in the steps 4 and 5 in a heat preservation furnace for 50-60 minutes, then sampling and analyzing, adjusting when the element content deviates, and confirming that the aluminum liquid components are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
7) refining outside the furnace and removing slag: after the step 6 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, the aluminum liquid can be discharged out of the furnace, the aluminum liquid is discharged from the heat preservation furnace, enters an online degassing device and a filtering device through a launder, is refined outside the furnace, and is degassed and deslagged again, wherein a deslagger is required to be used for deslagging;
8) continuous casting: continuously casting the clean aluminum liquid refined again in the step 7, controlling the casting temperature to be 685-695 ℃, controlling the temperature of casting cooling water to be 20-30 ℃, controlling the total pressure of the cooling water to be 0.35MPa, and casting by adopting a horizontal casting mode; meanwhile, according to the diameter range of the drawn monofilaments, the speed of a crystallization wheel and the pressure of cooling water are controlled, so that the temperature of a casting blank coming out of the crystallization wheel and on an approach bridge is 550-570 ℃;
9) and (3) continuous rolling: straightening and cooling the casting blank prepared in the step 8, controlling the temperature of the casting blank to be kept at 530-550 ℃ before rolling, and lubricating and cooling a roller and an aluminum bar by using emulsion in the rolling process; adjusting the pressure and flow of the emulsion liquid to ensure that the finishing temperature of the aluminum bar is less than or equal to 320 ℃;
10) and (3) cooling: and (3) keeping the aluminum bar obtained in the step 9) at the constant temperature of 300-350 ℃ for 6-8h, and then standing at room temperature for treatment.
In the step 1, industrial pure Al of Al99.70 is adopted, so that the aluminum alloy prepared by the method has the advantages of sufficient raw material supply, low cost, convenient purchase and the like; meanwhile, refined aluminum or high-purity aluminum can be used as a matrix alloy, the aluminum matrix has higher quality than a common aluminum-based material, and the processed product has more advantages in electrical property and mechanical property;
putting an aluminum substrate into a melting furnace, heating to melt the aluminum substrate, preserving heat at 750-760 ℃, adding a corresponding alloy, fully stirring to be uniform, standing and preserving heat for 45min, stirring uniformly, wherein the total time of manual stirring and electromagnetic stirring is more than or equal to 30min, immediately sampling after stirring uniformly, carrying out component analysis on the aluminum liquid in the step 2, determining material supplement according to an analysis result, and the sampling temperature is 740-760 ℃;
step 4, adding a high-efficiency powder spraying refining agent into the alloy melt, and refining by adopting high-purity nitrogen, wherein the dosage of the refining agent is 0.15-0.4 wt%, the purity of the refining agent carrier is high-purity nitrogen, the purity of the nitrogen is 99.999%, the refining time is controlled to be 20-30 minutes, and the nitrogen pressure is controlled to be 10-15 KPa;
step 4, controlling the temperature of the aluminum liquid to be 750 +/-10 ℃ before refining, and controlling the temperature of the aluminum liquid to be 740 +/-10 ℃ after refining;
in the step 5, the temperature of the aluminum liquid is controlled to be 730 +/-10 ℃ in the slagging-off process;
and 7, pouring the aluminum liquid out of the furnace, degassing by using an online degassing system, treating by using the degassing system in order to control harmful gas in the aluminum liquid, and detecting by using a hydrogen detector, wherein the gas content is less than or equal to 0.150ml/100g after degassing.
After the method is adopted, except for aluminum in a composition table of the aluminum alloy, the aluminum alloy comprises eight elements corresponding to mass fractions of silicon Si, iron Fe, copper Cu, manganese Mn, magnesium Mg, chromium Cr, zinc Zn and titanium Ti, the eight elements are mixed to form corresponding aluminum rods, blanks corresponding to the aluminum rods are used for manufacturing mobile phone frames, the mobile phone frames are pressed into corresponding mobile phone frame shapes and then subjected to subsequent processing, the outer surfaces of the mobile phone frames are not shiny, the brightness, the stretching degree, the yield strength and the elongation of the mobile phone frames are all suitable for operation of subsequent stations, the finished product yield of the mobile phone frames subjected to the subsequent processing operation is greatly increased, the processed and formed mobile phone frames are suitable for the subsequent processing operation according to the characteristics of the mobile phone frames, the finished product yield of the mobile phone frames is improved, and the quality of the mobile phones is ensured.
Detailed Description
The aluminum alloy material for manufacturing the mobile phone frame is characterized in that the aluminum alloy material comprises the following components in percentage by mass:
silicon Si: 0.6-0.8 wt%;
fe: less than or equal to 0.15 wt%;
copper Cu: 0.6-0.75 wt%;
manganese Mn: 0.1-0.2 wt%;
magnesium Mg: 0.8-1.0 wt%;
chromium Cr: less than or equal to 0.02wt percent;
zinc Zn: less than or equal to 0.02wt percent;
titanium Ti: less than or equal to 0.03 wt%;
the rest is aluminum; the mass percentages of all the components are added to be 100 percent.
An aluminum alloy material for manufacturing a mobile phone frame, which is disclosed in the first embodiment, comprises silicon (Si): 0.6 wt%, Fe: 0.15 wt%, copper Cu: 0.6 wt%, manganese Mn: 0.1 wt%, magnesium Mg: 0.8 wt%, chromium Cr: 0.02 wt%, zinc Zn: 0.02 wt%, titanium Ti: 0.03 wt% and the balance aluminum; the mass percentages of all the components are added to be 100 percent.
An aluminum alloy material for manufacturing a mobile phone frame, a specific embodiment II, silicon Si: 0.8 wt%, Fe: 0.1 wt%, copper Cu: 0.75 wt%, manganese Mn: 0.2 wt%, magnesium Mg: 1.0 wt%, chromium Cr: 0.015 wt%, zinc Zn: 0.018 wt%, titanium Ti: 0.025 wt% and the balance aluminum; the mass percentages of all the components are added to be 100 percent.
The third embodiment of the aluminum alloy material for manufacturing the mobile phone frame is as follows: 0.7 wt%, Fe: 0.13 wt%, copper Cu: 0.68 wt%, manganese Mn: 0.15 wt%, magnesium Mg: 0.9 wt%, chromium Cr: 0.018 wt%, zinc Zn: 0.019 wt%, titanium Ti: less than or equal to 0.028wt percent and the balance of aluminum; the mass percentages of all the components are added to be 100 percent.
A manufacturing process of an aluminum alloy material for manufacturing a mobile phone frame is characterized by comprising the following steps of: preparing aluminum liquid in advance according to the component proportion of the aluminum alloy material, and ensuring that the main components of the aluminum liquid are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum; then introducing the high-efficiency powder spraying refining agent into a melt in a heat preservation furnace filled with molten aluminum for refining, and adjusting the internal composition ratio of the molten aluminum to be silicon Si after slagging off: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03 wt% and the balance of aluminum, then refining outside the furnace and deslagging to obtain clean aluminum liquid, casting the clean aluminum liquid, and then straightening and cooling the cast blank, and then continuously rolling to form an aluminum rod.
The preparation method comprises the following specific steps:
1) raw material selection and smelting: inspecting raw materials, selecting aluminum ingots with corresponding grades for reasonable matching, putting the aluminum ingots into an aluminum melting furnace for melting, and controlling the temperature of aluminum liquid in the furnace to be less than or equal to 760 ℃;
2) and (3) analyzing the components of the aluminum liquid: transferring the smelted aluminum liquid or the electrolytic primary aluminum liquid into a heat preservation furnace, uniformly stirring, sampling, rapidly analyzing by using a direct-reading spectrometer, and detecting the contents of Si, Fe, Cu, Mn, Mg, Cr, Zn and Ti in the solution;
3) alloying treatment: according to the spectrum inspection result in the step 2, calculating the addition amount of the corresponding intermediate alloy, controlling the temperature of the aluminum liquid in the holding furnace to be 740 +/-10 ℃, adding the corresponding intermediate alloy, and stirring to ensure that the components of the aluminum liquid are fully and uniformly distributed, wherein the main components of the aluminum liquid comprise: silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
4) refining: after the step 3 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, 99.999 percent of high-purity nitrogen is used as a carrier, the high-efficiency powder spraying refining agent is introduced into a melt in a heat preservation furnace for refining, the purification treatment of degassing and removing impurities of the aluminum liquid is achieved, and the blowing speed of the refining agent and the pressure of the nitrogen are controlled during refining;
5) slagging off: after the step 4 is finished, cleaning aluminum slag floating on the surface of the aluminum liquid;
6) and (3) adjusting components, namely standing the aluminum liquid obtained in the steps 4 and 5 in a heat preservation furnace for 50-60 minutes, then sampling and analyzing, adjusting when the element content deviates, and confirming that the aluminum liquid components are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
7) refining outside the furnace and removing slag: after the step 6 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, the aluminum liquid can be discharged out of the furnace, the aluminum liquid is discharged from the heat preservation furnace, enters an online degassing device and a filtering device through a launder, is refined outside the furnace, and is degassed and deslagged again, wherein a deslagger is required to be used for deslagging;
8) continuous casting: continuously casting the clean aluminum liquid refined again in the step 7, controlling the casting temperature to be 685-695 ℃, controlling the temperature of casting cooling water to be 20-30 ℃, controlling the total pressure of the cooling water to be 0.35MPa, and casting by adopting a horizontal casting mode; meanwhile, according to the diameter range of the drawn monofilaments, the speed of a crystallization wheel and the pressure of cooling water are controlled, so that the temperature of a casting blank coming out of the crystallization wheel and on an approach bridge is 550-570 ℃;
9) and (3) continuous rolling: straightening and cooling the casting blank prepared in the step 8, controlling the temperature of the casting blank to be kept at 530-550 ℃ before rolling, and lubricating and cooling a roller and an aluminum bar by using emulsion in the rolling process; adjusting the pressure and flow of the emulsion liquid to ensure that the finishing temperature of the aluminum bar is less than or equal to 320 ℃;
10) and (3) cooling: and (3) keeping the aluminum bar obtained in the step 9) at the constant temperature of 300-350 ℃ for 6-8h, and then standing at room temperature for treatment.
In the step 1, industrial pure Al of Al99.70 is adopted, so that the aluminum alloy prepared by the method has the advantages of sufficient raw material supply, low cost, convenient purchase and the like; meanwhile, refined aluminum or high-purity aluminum can be used as a matrix alloy, the aluminum matrix has higher quality than a common aluminum-based material, and the processed product has more advantages in electrical property and mechanical property;
putting an aluminum substrate into a melting furnace, heating to melt the aluminum substrate, preserving heat at 750-760 ℃, adding a corresponding alloy, fully stirring to be uniform, standing and preserving heat for 45min, stirring uniformly, wherein the total time of manual stirring and electromagnetic stirring is more than or equal to 30min, immediately sampling after stirring uniformly, carrying out component analysis on the aluminum liquid in the step 2, determining material supplement according to an analysis result, and the sampling temperature is 740-760 ℃;
step 4, adding a high-efficiency powder spraying refining agent into the alloy melt, and refining by adopting high-purity nitrogen, wherein the dosage of the refining agent is 0.15-0.4 wt%, the purity of the refining agent carrier is high-purity nitrogen, the purity of the nitrogen is 99.999%, the refining time is controlled to be 20-30 minutes, and the nitrogen pressure is controlled to be 10-15 KPa;
step 4, controlling the temperature of the aluminum liquid to be 750 +/-10 ℃ before refining, and controlling the temperature of the aluminum liquid to be 740 +/-10 ℃ after refining;
in the step 5, the temperature of the aluminum liquid is controlled to be 730 +/-10 ℃ in the slagging-off process;
and 7, pouring the aluminum liquid out of the furnace, degassing by using an online degassing system, treating by using the degassing system in order to control harmful gas in the aluminum liquid, and detecting by using a hydrogen detector, wherein the gas content is less than or equal to 0.150ml/100g after degassing.
Except aluminum, the aluminum alloy comprises eight elements corresponding to mass fractions of silicon Si, iron Fe, copper Cu, manganese Mn, magnesium Mg, chromium Cr, zinc Zn and titanium Ti, the eight elements are mixed to form corresponding aluminum rods, blanks corresponding to the aluminum rods are used for manufacturing mobile phone frames, the mobile phone frames are pressed into corresponding mobile phone frame shapes and then subjected to subsequent processing, the outer surfaces of the mobile phone frames are not shiny, the brightness, the stretching degree, the yield strength and the elongation of the mobile phone frames are all suitable for operation of subsequent stations, the finished product yield of the mobile phone frames subjected to subsequent processing operation is greatly increased, the processed mobile phone frames are suitable for subsequent processing operation according to the characteristics of the mobile phone frames, the finished product yield of the mobile phone frames is improved, and the quality of the mobile phones is ensured.
The detailed description of the embodiments of the present invention is provided above, but the present invention is only the preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the invention as claimed should be covered by this patent.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The aluminum alloy material for manufacturing the mobile phone frame is characterized in that the aluminum alloy material comprises the following components in percentage by mass:
silicon Si: 0.6-0.8 wt%;
fe: less than or equal to 0.15 wt%;
copper Cu: 0.6-0.75 wt%;
manganese Mn: 0.1-0.2 wt%;
magnesium Mg: 0.8-1.0 wt%;
chromium Cr: less than or equal to 0.02wt percent;
zinc Zn: less than or equal to 0.02wt percent;
titanium Ti: less than or equal to 0.03 wt%;
the rest is aluminum; the mass percentages of all the components are added to be 100 percent.
2. A manufacturing process of an aluminum alloy material for manufacturing a mobile phone frame is characterized by comprising the following steps of: preparing aluminum liquid in advance according to the component proportion of the aluminum alloy material, and ensuring that the main components of the aluminum liquid are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum; then introducing the high-efficiency powder spraying refining agent into a melt in a heat preservation furnace filled with molten aluminum for refining, and adjusting the internal composition ratio of the molten aluminum to be silicon Si after slagging off: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03 wt% and the balance of aluminum, then refining outside the furnace and deslagging to obtain clean aluminum liquid, casting the clean aluminum liquid, and then straightening and cooling the cast blank, and then continuously rolling to form an aluminum rod.
3. The manufacturing process of the aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 2, characterized by comprising the following specific preparation steps:
1) raw material selection and smelting: inspecting raw materials, selecting aluminum ingots with corresponding grades for reasonable matching, putting the aluminum ingots into an aluminum melting furnace for melting, and controlling the temperature of aluminum liquid in the furnace to be less than or equal to 760 ℃;
2) and (3) analyzing the components of the aluminum liquid: transferring the smelted aluminum liquid or the electrolytic primary aluminum liquid into a heat preservation furnace, uniformly stirring, sampling, rapidly analyzing by using a direct-reading spectrometer, and detecting the contents of Si, Fe, Cu, Mn, Mg, Cr, Zn and Ti in the solution;
3) alloying treatment: according to the spectrum inspection result in the step 2, calculating the addition amount of the corresponding intermediate alloy, controlling the temperature of the aluminum liquid in the holding furnace to be 740 +/-10 ℃, adding the corresponding intermediate alloy, and stirring to ensure that the components of the aluminum liquid are fully and uniformly distributed, wherein the main components of the aluminum liquid comprise: silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
4) refining: after the step 3 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, 99.999 percent of high-purity nitrogen is used as a carrier, the high-efficiency powder spraying refining agent is introduced into a melt in a heat preservation furnace for refining, the purification treatment of degassing and removing impurities of the aluminum liquid is achieved, and the blowing speed of the refining agent and the pressure of the nitrogen are controlled during refining;
5) slagging off: after the step 4 is finished, cleaning aluminum slag floating on the surface of the aluminum liquid;
6) and (3) adjusting components, namely standing the aluminum liquid obtained in the steps 4 and 5 in a heat preservation furnace for 50-60 minutes, then sampling and analyzing, adjusting when the element content deviates, and confirming that the aluminum liquid components are silicon Si: 0.6-0.8 wt%, Fe: less than or equal to 0.15 wt%, Cu: 0.6-0.75 wt%, manganese Mn: 0.1-0.2 wt%, magnesium Mg: 0.8 to 1.0 wt%, chromium Cr: less than or equal to 0.02 wt%, zinc Zn: less than or equal to 0.02 wt%, Ti: less than or equal to 0.03wt percent and the balance of aluminum;
7) refining outside the furnace and removing slag: after the step 6 is finished, when the temperature of the aluminum liquid reaches 750 +/-10 ℃, the aluminum liquid can be discharged out of the furnace, the aluminum liquid is discharged from the heat preservation furnace, enters an online degassing device and a filtering device through a launder, is refined outside the furnace, and is degassed and deslagged again, wherein a deslagger is required to be used for deslagging;
8) continuous casting: continuously casting the clean aluminum liquid refined again in the step 7, controlling the casting temperature to be 685-695 ℃, controlling the temperature of casting cooling water to be 20-30 ℃, controlling the total pressure of the cooling water to be 0.35MPa, and casting by adopting a horizontal casting mode; meanwhile, according to the diameter range of the drawn monofilaments, the speed of a crystallization wheel and the pressure of cooling water are controlled, so that the temperature of a casting blank coming out of the crystallization wheel and on an approach bridge is 550-570 ℃;
9) and (3) continuous rolling: straightening and cooling the casting blank prepared in the step 8, controlling the temperature of the casting blank to be kept at 530-550 ℃ before rolling, and lubricating and cooling a roller and an aluminum bar by using emulsion in the rolling process; adjusting the pressure and flow of the emulsion liquid to ensure that the finishing temperature of the aluminum bar is less than or equal to 320 ℃;
10) and (3) cooling: and (3) keeping the aluminum bar obtained in the step 9) at the constant temperature of 300-350 ℃ for 6-8h, and then standing at room temperature for treatment.
4. The aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 3, wherein: in the step 1, industrial pure Al of Al99.70 is adopted, so that the aluminum alloy prepared by the method has the advantages of sufficient raw material supply, low cost, convenient purchase and the like; meanwhile, refined aluminum or high-purity aluminum can be used as a matrix alloy, the aluminum matrix has higher quality than a common aluminum-based material, and the processed product has more advantages in electrical property and mechanical property.
5. The aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 3, wherein: putting the aluminum matrix into a melting furnace in the step 1, heating to melt the aluminum matrix, preserving heat at 750-760 ℃, adding the corresponding alloy, fully stirring to be uniform, standing and preserving heat for 45min, stirring uniformly, wherein the total time of manual stirring and electromagnetic stirring is more than or equal to 30min, immediately sampling after stirring uniformly, analyzing the components of the aluminum liquid in the step 2, determining the material supplement according to the analysis result, and the sampling temperature is 740-760 ℃.
6. The aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 3, wherein: and step 4, adding a high-efficiency powder spraying refining agent into the alloy melt, and refining by adopting high-purity nitrogen, wherein the dosage of the refining agent is 0.15-0.4 wt%, the purity of the refining agent carrier is high-purity nitrogen, the purity of the nitrogen is 99.999%, the refining time is controlled to be 20-30 minutes, and the nitrogen pressure is controlled to be 10-15 KPa.
7. The aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 3, wherein: step 4, controlling the temperature of the aluminum liquid to be 750 +/-10 ℃ before refining, and controlling the temperature of the aluminum liquid to be 740 +/-10 ℃ after refining; and 5, controlling the temperature of the aluminum liquid to be 730 +/-10 ℃ in the slagging-off process.
8. The aluminum alloy material for manufacturing the mobile phone frame as claimed in claim 3, wherein: and 7, pouring the aluminum liquid out of the furnace, degassing by using an online degassing system, treating by using the degassing system in order to control harmful gas in the aluminum liquid, and detecting by using a hydrogen detector, wherein the gas content is less than or equal to 0.150ml/100g after degassing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010782372.XA CN112030046A (en) | 2020-08-06 | 2020-08-06 | Aluminum alloy material for manufacturing mobile phone frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114226483A (en) * | 2021-12-20 | 2022-03-25 | 江苏中福铝镁科技有限公司 | Section bar for mobile phone and forming method |
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