CN101736182A - Aluminum alloy strip for mobile phone battery shell and manufacturing method thereof - Google Patents
Aluminum alloy strip for mobile phone battery shell and manufacturing method thereof Download PDFInfo
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- CN101736182A CN101736182A CN200910312414A CN200910312414A CN101736182A CN 101736182 A CN101736182 A CN 101736182A CN 200910312414 A CN200910312414 A CN 200910312414A CN 200910312414 A CN200910312414 A CN 200910312414A CN 101736182 A CN101736182 A CN 101736182A
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Abstract
The invention provides an aluminum alloy strip for a mobile phone battery shell and a manufacturing method thereof, relates to an alloy strip and a manufacturing method thereof, and solves the problems of low tensile strength, high elongation after breakage and high earing rate of a conventional 3003-H14 aluminum alloy strip applied to the mobile phone battery shell, and uneven grain structures of alloys prepared by the conventional manufacturing method. The aluminum alloy strip is made from Si, Fe, Cu, Mn, Mg, Zn, Ti and Al. The tensile strength of the aluminum alloy strip is between 190MPa and 210MPa, the elongation after breakage of the aluminum alloy strip is between 2.0 and 4.0 percent, and the earing rate of the aluminum alloy strip is between 3 and 4 percent. The manufacturing method comprises the following steps of: mixing the materials; melting, casting, homogenizing annealing, hot rolling, and cold rolling to obtain the aluminum alloy strip for the mobile phone battery shell. The aluminum alloy strip for the mobile phone battery shell can improve the strength of the mobile phone battery shell and reduce wall thickness at the same time so as to improve the capacity of the battery shell.
Description
Technical field
The present invention relates to alloy strip steel rolled stock and manufacture method thereof.
Background technology
Develop rapidly along with communication medium industry, the volume of mobile phone reduces gradually, and function is on the increase, cause battery power consumption increasing, duration of service is shorter and shorter, for the capacity that improves battery case, increase cruise duration, the intensity and the hardness that adopt attenuate housing wall thickness, improve case material are optimal paths.The 3003-H14 aluminium alloy strips that existing application is used in hand phone battery case, its tensile strength is that 150MPa, elongation after fracture are 3%～8% under the room temperature, earing rate 4%～5% is difficult to satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case behind the material attenuate; The alloy grain of existing manufacture method preparation is thick and tissue odds even.
Summary of the invention
The present invention is that the 3003-H14 aluminium alloy strips tensile strength that existing application uses in hand phone battery case is low, elongation after fracture is high, earing rate is high in order to solve, behind the material attenuate, be difficult to satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case, the problem that alloy grain is thick and tissue odds is even of existing manufacture method preparation, and aluminum alloy strip for mobile phone battery shell and manufacture method thereof are provided.
Aluminum alloy strip for mobile phone battery shell of the present invention is made by 0.1%～0.4% Si, 0.4%～0.6% Fe, 0.07～0.15% Cu, 1.10%～1.3% Mn, 0.2%～0.5% Mg, 0.01%～0.08% Zn, 0.02%～0.03% Ti and 96.94%～98.10% Al by mass percentage.
The manufacture method of aluminum alloy strip for mobile phone battery shell is carried out according to the following steps: one, press mass percent Si:0.1%～0.4% of element in the aluminium alloy strips, Fe:0.4%～0.6%, Cu:0.07%～0.15%, Mn:1.1%～1.3%, Mg:0.2%～0.5%, Zn:0.01%～0.08%, Ti:0.02%～0.03% and Al:96.94%～98.10% takes by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot, join in the gas-fired air furnace then, under 700 ℃～740 ℃ conditions, be smelted into molten aluminium alloy, molten aluminium alloy is changed in the resistance reverberatory furnace again, through degasification, change over to after skimming and leave standstill stove, leave standstill 15min～30min, obtain melted molten aluminium alloy; Two, will behind the molten aluminium alloy process ceramic filter that step 1 obtains, be cast as aluminium alloy cast ingot; Three, will be placed on through the aluminium alloy cast ingot that step 2 makes in the equal stove, aluminium alloy cast ingot will be heated to 610 ℃～630 ℃ and be incubated 7h, and carry out homogenizing annealing and handle through 11h; Four, will utilize through the aluminium alloy cast ingot that step 3 is handled and be rolled into the band work in-process on the hot rolls; Five, will utilize rolled by cold rolling machine to become the band finished product through the band work in-process that step 4 makes.
Degasification in the described step 1, skim and castmethod is routine techniques.
Hot-rolling method in the described step 4 is: after earlier aluminium alloy cast ingot being heated to 480 ℃～520 ℃, utilize hot rolls to carry out split rolling method, temperature in the operation of rolling is controlled at 380 ℃～520 ℃, curls when the thickness of aluminium alloy cast ingot is 7mm～9mm, obtains the band work in-process.
Cold-rolling mill in the described step 5 is commercially available 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m.
Cold rolling process in the described step 5 is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38～42% the condition in every time working modulus with the band work in-process, then band is heated to 420 ℃～430 ℃ and be incubated 1h and carry out process annealing through 11h, will becomes the band finished product through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
The allowed band of single impurity is≤0.03% in the described aluminium alloy strips, and the scope of all dirt is≤0.15%, and the impurity in this scope is to the not influence of performance of aluminium alloy strips.
Aluminium alloy strips tensile strength of the present invention is that 190MPa～210MPa, elongation after fracture are 2.0%～4.0%, earing rate 3%～4%, can satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case.The preparation method of aluminum alloy strip for mobile phone battery shell of the present invention is by the per-cent of each element in the strict control alloy, and handle through homogenizing, make aluminium alloy strips finished product grain structure evenly, not have the thick and uneven second phase particle, intensity, plasticity and the deep drawability of aluminium alloy are strengthened.
Description of drawings
Fig. 1 is that 200 times of the aluminum alloy strip for mobile phone battery shell made of embodiment 13 are organized microgram.
Embodiment
Embodiment one: the aluminum alloy strip for mobile phone battery shell of present embodiment is made by 0.1%～0.4% Si, 0.4%～0.6% Fe, 0.07%～0.15% Cu, 1.10%～1.30% Mn, 0.2%～0.5% Mg, 0.01%～0.08% Zn, 0.02%～0.03% Ti and 96.94%～98.10% Al by mass percentage.
The tensile strength of the aluminum alloy strip for mobile phone battery shell of present embodiment is 190MPa～210MPa, elongation after fracture 2.0%～4.0%, earing rate 3%～4%, can satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case.
Embodiment two: what present embodiment and embodiment one were different is: aluminum alloy strip for mobile phone battery shell is made by 0.2%～0.3% Si, 0.45%～0.55% Fe, 0.09%～0.14% Cu, 1.15%～1.25% Mn, 0.25%～0.45% Mg, 0.02%～0.07% Zn, 0.022%～0.028% Ti and 97.212%～97.818% Al by mass percentage.
Embodiment three: what present embodiment was different with embodiment one or two is: aluminum alloy strip for mobile phone battery shell is made by 0.25% Si, 0.50% Fe, 0.12% Cu, 1.20% Mn, 0.35% Mg, 0.05% Zn, 0.025% Ti and 97.505% Al by mass percentage.
The tensile strength of the aluminum alloy strip for mobile phone battery shell of present embodiment is 200MPa, elongation after fracture 2.3%, earing rate 3.1%, can satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case.
Embodiment four: the manufacture method of the aluminium alloy strips of present embodiment is carried out according to the following steps: one, press mass percent Si:0.1%～0.4% of element in the aluminium alloy strips, Fe:0.4%～0.6%, Cu:0.07%～0.15%, Mn:1.1%～1.3%, Mg:0.2%～0.5%, Zn:0.01%～0.08%, Ti:0.02%～0.03% and Al:96.94%～98.10% takes by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot, join in the gas-fired air furnace then, under 700 ℃～740 ℃ conditions, be smelted into molten aluminium alloy, molten aluminium alloy is changed in the resistance reverberatory furnace again, through degasification, change over to after skimming and leave standstill stove, leave standstill 15min～30min, obtain melted molten aluminium alloy; Two, will behind the molten aluminium alloy process ceramic filter that step 1 obtains, be cast as aluminium alloy cast ingot; Three, will be placed on through the aluminium alloy cast ingot that step 2 makes in the equal stove, aluminium alloy cast ingot will be heated to 610 ℃～630 ℃ and be incubated 7h, and carry out homogenizing annealing and handle through 11h; Four, will utilize through the aluminium alloy cast ingot that step 3 is handled and be rolled into the band work in-process on the hot rolls; Five, will utilize rolled by cold rolling machine to become the band finished product through the band work in-process that step 4 makes.
Evenly, there is not the thick and uneven second phase particle in the grain structure of the aluminum alloy strip for mobile phone battery shell that the manufacture method of present embodiment obtains, and intensity, hardness and the deep drawability of aluminium alloy are strengthened.
Embodiment five: what present embodiment and embodiment four were different is: mass percent Si:0.2%～0.3% of pressing element in the aluminium alloy strips in the step 1, Fe:0.45%～0.55%, Cu:0.09%～0.14%, Mn:1.15%～1.25%, Mg:0.3%～0.4%, Zn:0.02%～0.07%, Ti:0.022%～0.028% and Al:97.262%～97.768% takes by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot.Other is identical with embodiment four.
Embodiment six: what present embodiment was different with embodiment four or five is: mass percent Si:0.25%, Fe:0.50%, Cu:0.12%, Mn:1.20%, Mg:0.35%, Zn:0.06%, Ti:0.025% and Al:97.495% by element in the aluminium alloy strips in the step 1 take by weighing aluminium silicon master alloy, ferro-aluminum master alloy, aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot respectively.Other is identical with embodiment four or five.
Embodiment seven: what present embodiment and embodiment four to six were different is: the temperature of the gas-fired air furnace in the step 1 is 710 ℃～735 ℃.Other is identical with embodiment four to six.
Gas-fired air furnace in the present embodiment and resistance reverberatory furnace are commercially available equipment.
Melting in the step 1 described in the present embodiment, degasification, skim and castmethod is routine techniques.
Embodiment eight: what present embodiment and embodiment four to seven were different is: the described hot-rolling method in the step 4 is: after earlier aluminium alloy cast ingot being heated to 480 ℃～520 ℃, utilize hot rolls to carry out split rolling method, temperature in the operation of rolling is controlled at 380 ℃～520 ℃, when the thickness of aluminium alloy cast ingot is 7mm～9mm, curl, obtain the band work in-process.Other is identical with embodiment four to seven.
Embodiment nine: what present embodiment and embodiment four to eight were different is: the described hot-rolling method in the step 4 is: after earlier aluminium alloy cast ingot being heated to 500 ℃, utilize and carry out split rolling method on the hot rolls, the temperature in the operation of rolling is controlled at 420 ℃～500 ℃.Other is identical with embodiment four to eight.
Embodiment ten: what present embodiment and embodiment four to nine were different is: the cold-rolling mill in the step 5 is commercially available 4-roller cold rolling mill, and its roll surface roughness Ra is 0.16 μ m～0.32 μ m.Other is identical with embodiment four to nine.
Embodiment 11: what present embodiment and embodiment four to ten were different is: the cold rolling process described in the step 5 is: be earlier the band that cold rolling one-tenth thickness is 1.2mm under 38%～42% the condition in every time working modulus with the band work in-process, then band is heated to 420 ℃～430 ℃ and be incubated 1h and carry out process annealing through 11h, will becomes the sheet material finished product through the band once cold rolling that room temperature was handled and reduced in process annealing at last.Other is identical with embodiment four to ten.
Embodiment 12: what present embodiment and embodiment four to 11 were different is: the cold rolling process described in the step 5 is that the temperature that middle band carries out process annealing is 420 ℃.Other is identical with embodiment four to 11.
Embodiment 13: the manufacture method of the aluminum alloy strip for mobile phone battery shell of (referring to Fig. 1) present embodiment is carried out according to the following steps: one, press the mass percent Si:0.3% of element in the aluminium alloy strips, Fe:0.5%, Cu:0.10%, Mn:1.3%, Mg:0.2%, Zn:0.05%, Ti:0.03% and Al:97.52% take by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot, join in the gas-fired air furnace then, under 740 ℃ of conditions, be smelted into molten aluminium alloy, aluminum melt is changed in the resistance reverberatory furnace again, through degasification, change over to after skimming and leave standstill stove, leave standstill 20min; Two, will behind the molten aluminium alloy process ceramic filter that step 1 obtains, be cast as aluminium alloy cast ingot; Three, will be placed on through the aluminium alloy cast ingot that step 2 makes in the annealing furnace, heating 11h makes aluminium alloy cast ingot be warming up to 620 ℃ and be incubated 7h, carries out homogenizing annealing and handles; Four, will be heated to 510 ℃ through the aluminium alloy cast ingot that step 3 is handled after, utilize hot rolls to carry out split rolling method, the temperature in the operation of rolling is controlled at 400 ℃～510 ℃, curls when the thickness of aluminium alloy cast ingot is 7mm～9mm, obtains the band work in-process; Five, the band that will obtain through step 4 is heated to 425 ℃ and be incubated 1h and carry out process annealing through 11h, will become the band finished product through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
Evenly, there is not the thick and uneven second phase particle in the grain structure of the aluminum alloy strip for mobile phone battery shell of present embodiment gained, its tensile strength is 208MPa, elongation after fracture 3.5%, earing rate 3.2%, can satisfy the asymmetric boxlike vast scale ironing punch forming requirement of hand phone battery case.
Claims (8)
1. aluminum alloy strip for mobile phone battery shell is characterized in that aluminum alloy strip for mobile phone battery shell made by 0.1%～0.4% Si, 0.4%～0.6% Fe, 0.07～0.15% Cu, 1.10%～1.3% Mn, 0.2%～0.5% Mg, 0.01%～0.08% Zn, 0.02%～0.03% Ti and 96.94%～98.10% Al by mass percentage.
2. aluminum alloy strip for mobile phone battery shell according to claim 1 is characterized in that aluminum alloy strip for mobile phone battery shell made by 0.2%～0.3% Si, 0.45%～0.55% Fe, 0.09%～0.14% Cu, 1.15%～1.25% Mn, 0.25%～0.45% Mg, 0.02%～0.07% Zn, 0.022%～0.028% Ti and 97.212%～97.818% Al by mass percentage.
3. aluminum alloy strip for mobile phone battery shell according to claim 1 and 2 is characterized in that aluminum alloy strip for mobile phone battery shell made by 0.25% Si, 0.50% Fe, 0.12% Cu, 1.20% Mn, 0.35% Mg, 0.05% Zn, 0.025% Ti and 97.505% Al by mass percentage.
4. the manufacture method of aluminum alloy strip for mobile phone battery shell as claimed in claim 1, the manufacture method that it is characterized in that aluminum alloy strip for mobile phone battery shell is carried out according to the following steps: one, press mass percent Si:0.1%～0.4% of element in the aluminium alloy strips, Fe:0.4%～0.6%, Cu:0.07%～0.15%, Mn:1.1%～1.3%, Mg:0.2%～0.5%, Zn:0.01%～0.08%, Ti:0.02%～0.03% and Al:96.94%～98.10% takes by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot, join in the gas-fired air furnace then, under 700 ℃～740 ℃ conditions, be smelted into molten aluminium alloy, molten aluminium alloy is changed in the resistance reverberatory furnace again, through degasification, change over to after skimming and leave standstill stove, leave standstill 15min～30min, obtain melted molten aluminium alloy; Two, will behind the molten aluminium alloy process ceramic filter that step 1 obtains, be cast as aluminium alloy cast ingot; Three, will be placed on through the aluminium alloy cast ingot that step 2 makes in the equal stove, aluminium alloy cast ingot will be heated to 610 ℃～630 ℃ and be incubated 7h, and carry out homogenizing annealing and handle through 11h; Four, will utilize hot rolls to be rolled into the band work in-process through the aluminium alloy cast ingot that step 3 is handled; Five, will utilize rolled by cold rolling machine to become the band finished product through the band work in-process that step 4 makes.
5. the manufacture method of aluminum alloy strip for mobile phone battery shell according to claim 4 is characterized in that in the step 1 mass percent Si:0.2%～0.3% by element in the aluminium alloy strips, Fe:0.45%～0.55%, Cu:0.09%～0.14%, Mn:1.15%～1.25%, Mg:0.3%～0.4%, Zn:0.02%～0.07%, Ti:0.022%～0.028% and Al:97.262%～97.768% takes by weighing aluminium silicon master alloy respectively, the ferro-aluminum master alloy, the aluminum bronze master alloy, aluminium manganese master alloy, pure magnesium ingot, aluminium zinc master alloy, aluminium titanium master alloy and fine aluminium ingot.
6. according to the manufacture method of claim 4 or 5 described aluminum alloy strip for mobile phone battery shell, the temperature that it is characterized in that gas-fired air furnace in the step 1 is 710 ℃～735 ℃.
7. the manufacture method of aluminum alloy strip for mobile phone battery shell according to claim 6, it is characterized in that the described hot-rolling method in the step 4 is: after earlier aluminium alloy cast ingot being heated to 480 ℃～520 ℃, utilize hot rolls to carry out split rolling method, temperature in the operation of rolling is controlled at 380 ℃～520 ℃, when the thickness of aluminium alloy cast ingot is 7mm～9mm, curl, obtain the band work in-process.
8. according to the manufacture method of claim 4,5 or 7 described aluminum alloy strip for mobile phone battery shell, it is characterized in that the cold rolling process described in the step 5 is: earlier be the band that cold rolling one-tenth thickness is 1.2mm under 38%～42% the condition in every time working modulus with the band work in-process, then band is heated to 420 ℃～430 ℃ and be incubated 1h and carry out process annealing through 11h, will becomes the band finished product through the band once cold rolling that room temperature was handled and reduced in process annealing at last.
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