200838394 九、發明說明： 【發明所屬之技術領域】 」 本發_提供—種應麟電子產品外殼件之高強度齡金及其製 法，尤指一種成分包含有1.1〜2· 5 Wt %銅、〇· 7〜1. 3 Wt %鎮、0· 7~1· 3 Wt %石夕及其餘為铭與無法避免之雜質所成之銘合金，且藉由固溶處理、泮 水、預熱、雜及報處理等步驟，俾使該!g合金賊大幅提升，同時 達到易焊接、高雛及成本低之魏，進喊g卜種應麟電子產品外 殼件之高強度銘合金及其製法之目的者。 【先前技術】 隨著科技的迅速發展與使用者對產品規格的要求，現今，市面上的 各項產品逐漸要求輕量化，如··腳踏車、汽車……等，其中，又以資气 電子產品為主，其除了要求本身内部結構須輕巧精密外，產品外殼的輕 畺化也漸漸為人們所重視，其也是減少電子產品重量的主因及最快途徑； 為了達到上述外设其輕量化之目的，一般都以鎭合金與銘合金等輕 • 金屬為主要結構，贼齡金除比重低外，還具有職好、防電磁干擾 (Electromagnetic Interference，EMI)、熱傳導率高、薄件、容易回收再利 用·….·等優點； • 如圖一所示，係一般習知鎂合金板材之製作流程，其包含下列步驟： -合金配製及熔解轉11，該合金配製雄解步驟U係賴錠與所欲 添加之金屬，放置同-容n内加熱，俾使鎂錠與添加之金雜為一體形 成鎂合金溶液；一鑄造步驟12，該鑄造步驟12係將該会金配製及溶解 步驟11之鎂合金溶液鑄造成鎂合金板材；一車削步驟13，該車削步驟 13係將鑄造步驟12之鎂合金板材做切斷或面削等處理，以平整板材表 5 200838394 面，-預熱及觸軋延步驟14，該雜及熱戦延步驟i4係將車削步 驟13後之鎮合金板材加熱後再進行軋延，以縮減鎮合金厚度達薄型化鎖 口金板材’-酸洗麵磨频15，賊洗或研磨㈣15雜預熱及執 間軋延步驟14所成之薄型鎂合金板材，以酸洗或研磨等方式處理^ 去除薄型鎮合金其表面氧化層； 經上述習_合金姆之製作流程步驟後，所完成之_化錢合金 板材，再齡冷加王猶㈣傾合奴硬度，爾齡纽壓製成型 時須以2GGt以上之溫度方能加工成型，俾而造成成型之不便性； 另請參閱圖二所示，係-般習知链合金板材之製作流程，其包含下 列步驟：一合金配製及炼解步驟21，該一合金配製及熔解步驟21係將 織與所添加金屬，放置同-容器内加熱，俾使|g錠與添加金屬炼為一 體形成銘合金溶液；一鑄造步，驟22，該#造步，驟22係、將該一合金配製 及熔解步驟21之鋁合金溶液鑄造成鋁合金板材；一車削步驟23，該車 削步驟23係將鑄造步驟22之鋁合金板材做切斷或面削等處理，以平整 板材表面；一軋延步驟24，該軋延步驟24係將車削步驟23後之鋁合金 板材進行軋延，以縮減鋁合金厚度達薄型化鋁合金板材；一酸洗或研磨 步驟25，該酸洗或研磨步驟25係將軋延步驟24所成之薄型銘合金板 材，以酸洗或研磨等方式處理，俾以去除薄型鋁合金其表面氧化層； 經上述習知鋁合金板材之製作流程步驟後，所完成之薄型化紹合金 板材’再藉由熱處理技術以強化銘合金之硬度，請再參閱圖三所示，係 一般習知之熱處理技術，其包含下列步驟··一固溶熱處理（s〇luti〇n treatment)步驟31，該固溶熱處理步驟31係指將材料生溫至固溶體單 相區一段時間，以便讓溶質全部溶入基地而成單一相；一淬水(qUench) 6 200838394 步驟32，該淬水步驟係指將固溶熱處理步驟31後的材料迅速冷卻以得 飽和固溶體；一時效處理(aging treatment)步驟33，該時效處理步驟 33係指將此過飽和固溶體放置在恆溫，使其固溶體逐漸析出析出物，而 造成鋁合金性質上的變化； 又’一般常用熱處理技術強化之鋁合金係包括有：2XXX系列（2χχχ 系列合金之典型代表）、6χχχ系列（6χχχ系列合金之典型代表)及7χχχ 系列（7χχχ系列合金之典型代表）等鋁合金，另請再參閱圖四所示，係為 φ 7075、2024及6061三種不同的熱處理型合金之自然時效曲線圖，其中 以2024及6061會有明顯的平台區，亦即固溶處理後放置一週至數年仍 能維持一致的拉伸性質，惟該6χχχ系列合金強度遠遠不及7χχχ系列與 2χχχ系列合金強度，又該7075係呈現一持續上升之不穩定狀態，不易 運用於電子產品外殼成型之材料特性，另該2ΧΧΧ系列合金之成份主要係 以銅(Cu)為主要合金元素而鎂(Mg)、矽(si)次之，其合金(Qj+jjg+si)添 加量為5質量%左右，而該合金添加量愈多則強度愈高，但相對造成焊接 時介金屬晶出物之形成，其焊接性也相對愈差，同時亦為造成2χχχ系列 # 合金材料之成型性不佳之主因； 另請再參閱下表所示，係鎂合金(則、麵）、2χχχ系列(篇)與 6χχχ系列(6061)鋁合金其材料特性表(其中，比強度=拉伸強度/密度或 降伏強度/密度）： 材料 拉伸強度 (TSXMPa) 降伏強度 (YSXMpa) 延長率(%) 比強度 ΑΖ31(鎂合金） 290 220 10 161 & 122 ΑΖ91(鎂合金） 230 160 3 127 & 89 2024-0 〈220 一 1 — <95 >12 甚小 7 200838394 2024-T3 >435 >290 >15 >155 & >103 2024-T8 >480 >425 >3 >171 & >151 6061-0 125 55 25 甚小 6061-T6 310 275 12 116 & 103 综上所述，現今市面上所用之鎂合金其強度與延長率皆不比2xxx 系列銘合金來的優異，且鎂合金於壓型時須在2〇(rc以上之高溫成型， 而2xxx系列鋁合金與βχχχ系列鋁合佘雖可於常溫間沖壓成型，但2χχχ 系列鋁合金因添加大量之合金物，使得2ΧΧΧ系列鋁合金不易焊接甚至無200838394 IX. Description of the invention: [Technical field to which the invention pertains] The present invention provides a high-strength age gold for the shell member of the Yinglin electronic product and a method for preparing the same, in particular, a component comprising 1.1 to 2.5 Wt% copper, 〇· 7~1. 3 Wt % town, 0·7~1· 3 Wt % Shi Xi and the rest are alloys of Ming and inevitable impurities, and are treated by solution treatment, watering, preheating, Miscellaneous and newspaper processing steps, so that the !g alloy thief is greatly improved, at the same time to reach the easy welding, high chicks and low cost Wei, into the high-strength alloy of the shell of Yinglin electronic products and its preparation method Target person. [Prior Art] With the rapid development of technology and the requirements of users for product specifications, nowadays, various products on the market are gradually required to be lightweight, such as bicycles, automobiles, etc. Mainly, in addition to requiring its internal structure to be light and precise, the simplification of the product's outer casing is gradually gaining attention, which is also the main reason and the fastest way to reduce the weight of electronic products; Generally, light metal such as niobium alloy and alloy is used as the main structure. In addition to low specific gravity, it also has good occupation, electromagnetic interference (EMI), high thermal conductivity, thin parts, and easy recycling. Advantages of using ·..·; • As shown in Figure 1, it is a general production process of magnesium alloy sheet, which includes the following steps: - alloy preparation and melting turn 11, the alloy is prepared by the process of U-solution and The metal to be added is placed in the same volume to heat, and the magnesium ingot and the added gold are integrated to form a magnesium alloy solution; a casting step 12, the casting step 12 is The magnesium alloy solution of the gold preparation and dissolution step 11 is cast into a magnesium alloy sheet; in a turning step 13, the turning step 13 is performed by cutting or surface-cutting the magnesium alloy sheet of the casting step 12 to flatten the sheet 5 200838394 Surface, - preheating and rolling step 14, the hybrid and thermal stretching step i4 is to heat the alloy sheet after the turning step 13 and then roll to reduce the thickness of the alloy to a thinned gold plate. Pickling surface grinding frequency 15, thief washing or grinding (4) 15 misheating and intercalation rolling step 14 into a thin magnesium alloy sheet, treated by pickling or grinding, etc. to remove the surface oxide layer of the thin town alloy; After the production process of the _ alloy um, the finished _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The inconvenience of forming; see also Figure 2, the process of manufacturing a conventional alloy alloy sheet, comprising the following steps: an alloy preparation and refining step 21, the alloy preparation and melting step 21 Place Add metal, place it in the same container, heat it, and make the |g ingot and the added metal refining to form a Ming alloy solution; a casting step, step 22, the #step, step 22, the alloy preparation and melting step The aluminum alloy solution of 21 is cast into an aluminum alloy sheet; in a turning step 23, the turning step 23 is performed by cutting or surface-cutting the aluminum alloy sheet of the casting step 22 to level the surface of the sheet; and rolling step 24, The rolling step 24 is to roll the aluminum alloy sheet after the turning step 23 to reduce the thickness of the aluminum alloy to a thinned aluminum alloy sheet; a pickling or grinding step 25, the pickling or grinding step 25 is a rolling step 24 thin-type alloy plates are treated by pickling or grinding, etc., to remove the surface oxide layer of the thin aluminum alloy; after the above-mentioned conventional aluminum alloy sheet production process steps, the thin-formed alloy sheet is completed. 'The heat treatment technique is used to strengthen the hardness of the alloy. Please refer to Figure 3 for a general heat treatment technique, which includes the following steps: a solid solution heat treatment (s〇luti〇n treatment) step 31, the solution heat treatment step 31 refers to the temperature of the material to a solid solution single phase region for a period of time, so that the solute is completely dissolved into the base to form a single phase; a quenching water (qUench) 6 200838394 step 32, the quenching water The step means that the material after the solution heat treatment step 31 is rapidly cooled to obtain a saturated solid solution; an aging treatment step 33, which means that the supersaturated solid solution is placed at a constant temperature to make it The solid solution gradually precipitates precipitates, which causes changes in the properties of the aluminum alloy. Moreover, the aluminum alloys that are generally strengthened by conventional heat treatment techniques include: 2XXX series (typical representative of 2χχχ series alloys), 6χχχ series (typical of 6χχχ series alloys) Representative) and 7χχχ series (typical representatives of 7χχχ series alloys), etc., please refer to Figure 4 again, which is the natural aging curve of three different heat treatment alloys of φ 7075, 2024 and 6061, of which 2024 and 6061 will have a clear platform area, that is, it can maintain consistent tensile properties after one week to several years after solution treatment, but the strength of the 6χχχ series alloy is far. And the strength of the 7χχχ series and 2χχχ series alloys, and the 7075 series presents a continuously rising unstable state, which is not easy to be applied to the material properties of the outer casing of the electronic product. The composition of the 2ΧΧΧ series alloy is mainly copper (Cu) as the main alloy. The element is followed by magnesium (Mg) and bismuth (si), and the alloy (Qj+jjg+si) is added in an amount of about 5% by mass. The more the alloy is added, the higher the strength, but the relative metallization during welding. The formation of crystals is relatively poor in weldability, and it is also the main cause of poor moldability of 2χχχ series# alloy materials; please refer to the table below for magnesium alloy (then, surface), 2χχχ series Table of material properties of (6) and 6χχχ series (6061) aluminum alloys (wherein specific strength = tensile strength / density or strength / density): tensile strength of material (TSXMPa) strength of lodging (YSXMpa) elongation rate (%) Specific strength ΑΖ31 (magnesium alloy) 290 220 10 161 & 122 ΑΖ91 (magnesium alloy) 230 160 3 127 & 89 2024-0 <220 a 1 — <95 >12 Very small 7 200838394 2024-T3 >435 >290 >15 >155 &>103 2024- T8 >480 >425 >3 >171 &>151 6061-0 125 55 25 Very small 6061-T6 310 275 12 116 & 103 In summary, the strength of the magnesium alloy used in the market today The elongation rate is not superior to that of the 2xxx series of alloys, and the magnesium alloy must be formed at a temperature of 2 〇 or higher at a temperature above rc, while the 2xxx series aluminum alloy and the β χχχ series aluminum alloy can be stamped at room temperature. However, the 2χχχ series aluminum alloys are difficult to weld or even without the addition of a large amount of alloys.
法焊接，同時使得該2χχχ系列合金其成型性較低，故該2χχχ系列合金 於沖壓成型時，會產生龜裂之情形，其結果可參閱圖七之2024-Τ3與 2024 0俾而不適合電子產品之外殼使用，反觀，該6m系列銘合金雖 可焊接，但It 6XXX系、列銘合金之強度卻無法與2χχχ系、列铭合金強度相 比擬，俾而造成6χχχ系列鋁合金應用於外殼使用時，需要更大之厚度或 加強，無法更輕薄化； 因此’如何將上述等缺失加以摒除，並提供—種強度佳、成型性好 且易焊接之應_電子產品精狀高強度齡纽其躲，即為本案 發明人所欲解決之技術困難點之所在。 【發明内容】 其外殼件之高強·金及其製法， 一備料步驟，該備料步驟係提供—成分包含有」.卜25細銅、 =· a m鎂替L 3 _夕及其餘聽與無法避免爾所成之銘 一固溶處理步驟，該 固溶處理轉顧料㈣解叙齡金加 8 200838394 溫至54(rc±l(TC維持30〜90分鐘； 一泮水步驟’該淬水步驟係將固溶處理步驟後之鋁合金迅速冷卻； 一預熱步驟’該預熱步驟係將淬水步驟後之鋁合金加溫至1〇〇〜15〇 °C維持5〜50分鐘； 一整型步驟’該整型步驟係將預熱步驟後之鋁合金壓製成型； 一時效處理步驟’該時效處理步驟係將整型步驟後之鋁合金加溫至 175〜190°C維持2〜8小時；The welding method also makes the 2χχχ series alloys have low moldability. Therefore, the 2χχχ series alloys may be cracked during stamping, and the results can be referred to as 2024-Τ3 and 2024 0俾 of Fig. 7 and are not suitable for electronic products. The outer shell is used. In contrast, although the 6m series alloy can be welded, the strength of the It 6XXX series and the listed alloy cannot be compared with the strength of the 2χχχ series and the listed alloy, which causes the 6χχχ series aluminum alloy to be used in the outer casing. Need more thickness or reinforcement, can not be more light and thin; therefore 'how to remove the above-mentioned missing, and provide a good strength, good formability and easy to weld _ electronic products fine high-intensity age That is the technical difficulty point that the inventor of the case wants to solve. SUMMARY OF THE INVENTION The high strength and gold of the outer casing member and the preparation method thereof, a preparation step, the preparation step is provided - the composition contains ".25 fine copper, =·am magnesium for L 3 _ eve and the rest can not be avoided Ercheng Zhiming a solution treatment step, the solution treatment turn the material (4) solution to the age of gold plus 8 200838394 temperature to 54 (rc ± l (TC maintained 30 ~ 90 minutes; a water step 'the quenching step will The aluminum alloy after the solution treatment step is rapidly cooled; a preheating step 'the preheating step is to heat the aluminum alloy after the quenching step to 1 〇〇 15 15 ° C for 5 to 50 minutes; 'The integral step is to press-form the aluminum alloy after the preheating step; an aging treatment step 'the aging treatment step is to heat the aluminum alloy after the step of the step to 175 to 190 ° C for 2 to 8 hours;
本發明藉由備料步驟所準備之鋁合金，再藉由固溶處理、淬水、預 熱、整型鱗效處理等步驟，俾使齡金㈣結構發生機化，產生高 山度之、、碰析出物，藉此析出物翻強脑合金之效果，同時達到易焊 接同早刃性及成本低之功效，進而達到一種應用於電子產品外殼件之高 強度鋁合金及其製法之目的者。 【實施方式】 二=示其::=7種應_子產品外殼件之高強度 銅、οΤΓΓπ驟41 ’職辭驟41係提供—成分包含有h 1〜2.5 ™ 之紹合金，嫩線秋權所成 :固溶處理步驟42 ’該固溶處理步驟42係 速冷卻再執==^43她㈣㈣祕金迅 1〇〇^150^5^ΓΓΓΓ 44 43 予5 50刀鐘，再執行整型步驟45，· 9 200838394 型或：:=:=，_4後™^ 46 45 ^ 本發明精由上述之銘合金，以固溶處理步驟犯加溫至跳灿。cThe invention adopts the aluminum alloy prepared by the preparation step, and then through the steps of solution treatment, quenching, preheating, and sizing treatment, the structure of the ageing gold (4) is mechanized, and the mountain is generated. Precipitates, thereby extracting the effect of strengthening the brain alloy, and at the same time achieving the effect of easy welding with the early edge and low cost, thereby achieving a purpose of high-strength aluminum alloy applied to the outer casing of the electronic product and its preparation method. [Embodiment] Two = show:: = 7 kinds of high-strength copper of _ sub-product shell parts, οΤΓΓ π 41 ''s heads 41 series provide - the composition contains h 1~2.5 TM of Shao alloy, tender line autumn权成成:Solution treatment step 42 'The solution treatment step 42 is quick cooling and then hold ==^43 her (four) (four) secret Jin Xun 1 〇〇 ^ 150 ^ 5 ^ ΓΓΓΓ 44 43 to 5 50 knives, and then complete Type step 45, · 9 200838394 type or ::::=, _4 after TM^ 46 45 ^ The invention is refined by the above-mentioned alloy, and the solution treatment step is heated to jump. c
ΖΓ9Γ鐘’俾使得織合金觀其_ (銅普奶能全部溶入銘 土材中而成早-溶體後’再藉由淬水步㈣迅速冷卻，俾使 付該銘合金材料成為飽和體，騎由預熱步驟44加溫至⑽〜⑽。C =持5,分鐘’俾以壓抑自鱗效而餅後續時效處_，能差生較高 密度分佈之析出物’俾社幅度提昇齡金之降倾度，又再預熱步驟 執行後俾以整型步驟45將該|g合金椒樣製或平整，另又再 藉由時效處理㈣46加溫至175〜靴特2〜8树，俾使齡金材料 ”内#、、。觀生—種補化，俾*產生細緻析出物，且因本發明於固溶 處理步驟42鱗水步驟43後’執行麵步驟44，故此時時效處理步驟 46所產生之析出物，係為高密度且細緻之析出物，俾而大幅提升銘合金 材料之強度； 、貝際測4之拉伸性質如下表戶斤示，亦即本發明之銘合金材料及處理 方式，在材料強度（或比強度)上優於習知電子產品外殼的鎮合 金、鈦合金、及一般6χχχ、5XXX緣合金，本發曰月之銘合金材料其拉伸 降伏強度姻紐於2xxx_合金，由本發明之處理方式可更進一 步的提升材料強度（或比強度），· 材料及處理方 法 拉伸強度 (TSXMPa) 降伏強度 (YSXMpa) 伸長率(%) 比強度（TS/密 度或YS/密度） 本發明之鋁合 金材料配合習| 390 360 8 148 & 128 200838394 知T6之處理方 法 本發明之銘合 金材料配合本 發明處理方法 481 450 10 181 & 160 又，本發明之鋁合金成份係包含有1· 1〜2· 5 wt%銅、〇· 7〜1. 3 Wt%鎂、 0· 7〜1. 3 Wt%梦及其餘為鋁與無法避免之雜質所成之鋁_銅—鎂—矽之鋁合 金材料，其中，該合金物之較佳添加量為1· 6質量%銅、丨質量%鎮及i 質量»，因此，銅之添加量比2χχχ系列鋁合金減少許多，進而減省銘 合金之材料成本； 再者，藉由本發明之鋁合金材料，係只添加少量之合金物（鋼_鎂一 石夕），故本發明具有良好的焊接性，其結果請參閱圖六及下表所示，下表 係本發明焊接後鋁合金材料特性表： 材料 拉伸強度 (TSXMPa) 降伏強度 (YS)(Mpa) 延長率 (%) 1發明之鋁合金材料 T6(TIG對接後） 393〜410 350〜363 6. 9〜8· 4 故’本發日月之銘合金材料係具有良好的焊接性，相對於習知之2〇14 • 婦’由Metal Handb〇〇k之說明，以™對接是無法焊接或強度偏低而 不被允許的； 本發麵添加物α卜2.5質量_-〇. 7~L 3 f量纖^. ^ 3質量％ 梦）較少’故本發明之成型性較佳，其結果可參閱圖七所示，圖七之 2024-0或2024-T3(2xxx系列合金代表)於沖壓成型時皆無法有效成型， •财龜裂產生，反觀’本發明之!s合金材料經㈣後，該齡金材料仍 能順利成型； 口此藉由本發明之!g合金其成份係包含：質量％銅、 U〜1.3質《鎂、0.R3質量_及其餘為_無法避免之雜質所成之 200838394 銘α金，再藉由本發明之固溶、淬水、賴、難及時效等步驟，俾使 該銘合金強度可大巾*提升，啊藉由驗合金之成份娜，俾而達到易 焊接、高韋刃性及成本低之功效，進而達到一種應用於電子產品外殼件之 高強度鋁合金及其製法之目的者； 綜上所述’本發明在突破先前之技術結構下，轉實已達到所欲增進 之功效，且也非熟悉該項技藝者所易於思及，再者，本發日种請前未曾 么開’其所具之進步性、實用性，顯已符合發明專利之申請要件，轰依 法提出中請，_貴局絲本件發明糊巾請案，靖創作，至感德 便。 【圖式簡單說明】 第一圖係習知中鎂合金板材之製作流程示意圖。 第二圖係習知中鋁合金板材之製作流程示意圖。 第二圖係習知中鋁合金板材之熱處理技術之流程示意圖。 弟四圖係為7075、2024及6061三種不同的熱處理型合金之自然時效 曲線圖。 第五圖係本發明中高強度鋁合金之製作流程示意圖。 第六圖係本發明中鋁合金之顯微組織圖式。 第七圖係本發明與習知2024-Τ3及2024-0合金沖壓成型後之情形。 12 200838394 【主要元件符號說明】 11···合金配製及熔解步驟 12…鑄造步驟 13...車削步驟 14··.預熱及熱間軋延步驟 15···酸洗及研磨步驟 21···合金配製及熔解步驟 22...鑄造步驟 23...車削步驟 24…軋延步驟 25·.·酸洗及研磨步驟 31…固溶熱處理步驟 32…淬水步驟 33···時效處理步驟 41...備料步驟 42···固溶處理步驟 43...淬水步驟 44…預熱步驟 45..·整型步驟 46.··時效處理步驟 13ΖΓ9Γ's '俾 makes the woven alloy view _ (copper milk can be dissolved into the inscription soil into the early-solution) and then rapidly cooled by the quenching step (four), so that the alloy material becomes saturated Ride from the preheating step 44 to (10) ~ (10). C = hold 5, minutes '俾 to suppress the self-streating effect and the subsequent aging of the cake _, can produce a higher density distribution of precipitates' The inclination is lowered, and after the preheating step is performed, the |g alloy pepper is prepared or flattened by the integral step 45, and further heated by the aging treatment (4) 46 to 175~boots 2~8 trees, 俾The ageing gold material "inner #, , 观生-species complement, 俾* produces fine precipitates, and because of the present invention in the solution treatment step 42 scale water step 43 'execution surface step 44, so the aging treatment step The precipitates produced by 46 are high-density and fine-grained precipitates, which greatly increase the strength of the alloy materials; and the tensile properties of Beiji 4 are as follows, which is the alloy material of the invention. And the treatment method, which is superior to the alloy of the outer shell of the conventional electronic product in the strength (or specific strength) of the material, Alloy, and general 6χχχ, 5XXX edge alloy, the tensile strength of the alloy of the hair of the moon, the tensile strength of the alloy is 2xxx_ alloy, and the treatment method of the invention can further improve the strength (or specific strength) of the material, And treatment method Tensile strength (TSXMPa) Falling strength (YSXMpa) Elongation (%) Specific strength (TS/density or YS/density) The aluminum alloy material of the present invention is matched with | 390 360 8 148 & 128 200838394 Know T6 The treatment of the alloy material of the present invention in combination with the treatment method of the present invention 481 450 10 181 & 160 Further, the aluminum alloy component of the present invention comprises 1·1~2·5 wt% copper, 〇·7~1. 3 Wt % magnesium, 0·7~1. 3 Wt% dream and the rest of the aluminum-copper-magnesium-bismuth aluminum alloy material formed by aluminum and unavoidable impurities, wherein the alloy is preferably added in an amount of 1· 6% by mass of copper, 丨% by mass and i quality», therefore, the addition amount of copper is much lower than that of the 2χχχ series aluminum alloy, thereby reducing the material cost of the alloy, and further, by the aluminum alloy material of the present invention, Add a small amount of alloys (steel_magnesium one stone eve Therefore, the present invention has good weldability, and the results thereof are shown in Fig. 6 and the following table. The following table shows the characteristics of the aluminum alloy material after welding according to the present invention: tensile strength of the material (TSXMPa) strength of fall (YS) (Mpa) ) elongation rate (%) 1 invention of aluminum alloy material T6 (after TIG docking) 393~410 350~363 6. 9~8· 4 Therefore, the original alloy of the moon and the moon has good weldability, as opposed to 2〇14 • Women's description by Metal Handb〇〇k, TM can not be welded or low strength is not allowed; this hair additive α b 2.5 quality _-〇. 7~L 3 f quantity fiber ^. ^ 3 mass % dream) less 'The moldability of the invention is better, the result can be seen as shown in Figure 7, Figure 20 of 2024-0 or 2024-T3 (2xxx series alloy representative) in the stamping It can not be effectively formed during molding, and the crack is generated. In contrast, the alloy material of the present invention can be smoothly formed after the alloy material of (4). The composition of the alloy of the present invention includes: quality. % copper, U ~ 1.3 quality "magnesium, 0.R3 quality _ and the rest is _ unavoidable impurities made of 200838394 Ming α gold, By the steps of solid solution, quenching, laminating, difficult and timely action of the invention, the strength of the alloy can be improved by the thickness of the alloy, and the alloy is alloyed, and the weldability and the high edge are achieved. The utility model has the advantages of low cost, and thus achieves the purpose of a high-strength aluminum alloy applied to an outer casing of an electronic product and a method for preparing the same; In summary, the invention has achieved the desired effect under the prior art structure. And it is not easy for people who are familiar with the art to think about it. Moreover, this kind of daily application has not been opened before, and its progressive and practical nature has already met the application requirements of the invention patent. Please, _ your hair silk this invention in the case of a scarf, Jing creation, to the sense of virtue. [Simple description of the diagram] The first diagram is a schematic diagram of the production process of the magnesium alloy sheet in the prior art. The second figure is a schematic diagram of the production process of the aluminum alloy sheet in the prior art. The second figure is a schematic flow chart of the heat treatment technology of the aluminum alloy sheet in the prior art. The four drawings are the natural aging curves of three different heat-treated alloys of 7075, 2024 and 6061. The fifth figure is a schematic diagram of the production process of the high-strength aluminum alloy in the present invention. The sixth drawing is a microstructure diagram of the aluminum alloy in the present invention. The seventh figure shows the situation of the present invention and the conventional 2024-Τ3 and 2024-0 alloys after press forming. 12 200838394 [Description of main component symbols] 11··· Alloy preparation and melting step 12... casting step 13...turning step 14·. preheating and hot rolling step 15··· pickling and grinding step 21· · Alloy preparation and melting step 22... casting step 23... turning step 24... rolling step 25 · pickling and grinding step 31 ... solution heat treatment step 32 ... quenching step 33 · · · aging treatment Step 41... Preparation Step 42···Solution Treatment Step 43...Quenching Step 44...Preheating Step 45..·Integer Step 46.··Aging Treatment Step 13