201139696 六、發明說明： 【發明所屬之技術領域】 本發明係有關鑄造鋁合金後硏磨所構成，光輝性優異之 鋁合金鑄造物，特別是有關汽車用鋁輪圈。又有關此種鋁 合金鑄造物之製造方法。 【先前技術】 銘合金造物用於汽車、二輪車等運輸設備；自行車、 釣具等休閒用品；建築構件；電子機器或日用品等各種領 域。由於合金材料中鋁合金具有較高的強度，因此鋁合金 鑄造物適用在要求強度和輕盈之用途。特別是，於汽車、 二輪車等運輸設備等中，由於從燃料和環境面等的觀點看 來’對輕量化的要求很高，因此，使用鋁合金鑄造物作爲 此種部件的情形增加。另一方面，於鋁合金鑄造物用來作 爲運輸設備之外部零件等情況下，除了機械性能，亦大多 要求設計性。就作爲給予此種鋁合金鑄造物設計性之一手 段而言，提高光輝性因獲得質感和美感而有效。 尤其是汽車用鋁輪圈因設計性能顯著影響其商品價値要 求有高的設計性。另一方面，汽車用鋁輪圈需要高安全性。 因此，至今鑄造汽車用鋁輪圈用鋁合金主要使用強度、硬 度優異的AC4CH等Al-Si-Mg系合金。然而，Al-Si-Mg系合 金因Si偏析所造成之硬析出物出現在表面上，是以即使進 行硏磨’仍難獲得良好的光輝性。光輝性優異之鋁合金廣 泛使用AC7A等Al- Mg系合金。這種Al-Mg系合金儘管 -4- 201139696 光輝性優異’鑄造性卻差，強度和硬度不足。又，甚至無 法藉由熱處理’提闻強度和硬度。因此，到目前爲止之鑄 造汽車用鋁輪圈在使用A^Si_Mg系合金鑄造方面大多形成 裝飾用鎪鉻等，賦與設計性。但是，在形成鍍鉻情況下， 除了高成本’因使用氰化物和6價鉻等有害物質而有環境 面的問題，亦有鋁合金回收性方面的問題。另一方面，已 提出多項措施’以維持強度等，同時提高鋁合金鑄造物表 面的光輝性。 於專利文獻1中記載一種鋁壓鑄合金材料，其含有Si : 0.2 質量 ％，Mg: 2.2 〜4.0 質量 ％，Fe: 0.25 〜〇·4 質量 ％， 锰：0.05質量％’ Zn: 0.5〜1.5質量％，Cu: 〇.〇5質量％以 下’ Ti : 0_03質量％以下，其餘由A1和不可避免的雜質構 成。於實施例中記載，在將所製作之鋁壓鑄合金材料鏡面 拋光加工後，形成厚度爲5μιη之耐硫酸鋁之鋁壓鑄合金材· 料。然而，該壓鑄鋁合金材料的光輝性不充分。 於專利文獻2中記載一種光輝性鋁合金材料，特/徵& 於，含有質量 ％ 爲 Si: 0.005 〜0.03 %，Fe: 0.005 〜〇.〇5 %， Mg: 2.5〜5_0%，Cr:0.10〜0 0.30 %，Cu:0.〇l〜〇1%，Ti: 0.02%以下，Be : 0.001至0· 02，其餘由A1和不可避免的雜 質構成。該鋁合金材料因調整基質和析出物之溶解W f立， 使硏磨表面的溶解變得均一而平滑化，故獲得光輝性。又， 藉由在預定條件下熱處理，帶來光輝性。這種鋁合金材_ 201139696 已被記載爲適用於汽車輪圏。不過，鋁合金材料的光輝性 仍不夠充分。 於專利文獻中記載Zn4.5〜6.5重量％，Mg0.4〜1_2重量 %，Cu0.05 〜0.40 重量 ％、Zr〇.〇5 〜〇.25 重量 ％，；pe〇15 重量 %以下’其餘由A1和不可避免的雜質構成，特徵在於，Zn 含量和Mg含量之比Zn/Mg爲6至12, Fe含量和Si含量之 比Fe/Si爲1.5以上’光輝性及熱加工性優異之高強度鋁合 金。於實施例中記載’在均質化處理此種組成之鑄塊後， 時效硬化處理擠出加工獲得的中空材之鋁合金材料，該鋁 合金材料發揮優良的機械性質、光輝性 '耐應力腐蝕性及 熱加工性。然而’鋁合金材料之光輝性仍然不足。 於專利文獻4中記載含Mg2至6%，Zn.l至5%，Ti0.0 3 至 0.4% ’ 和 Ζι.0.03%至 0.4%，MnO.lO 至 1.0%，Cr0.05 至 0.6%之任一種以上，且Ti和Zr的總和在0.4 %以下，其餘 爲A1和伴同之雜質組成的鋁合金鑄造物。此種鋁合金維 持鑄造物耐應力腐蝕性、陽極氧化性、機械加工性等A1-Mg 系所具有各種性質’鑄造性，機械性質、熔接性獲得改善。 又，於就該鑄造用鋁合金之用途所示多數例子中記載汽車 用輪圈。於實施例中記載，在鹼蝕所鑄造之該鋁合金，以 磷酸硝酸溶液化學硏磨後，形成厚度1 0微米之陽極氧化皮 膜。此時之表面呈美麗的銀白色。然而，此種鋁合金之光 輝性仍然不足。 [先前技術文獻] 201139696 [專利文獻] [專利文獻1 ]特開2 0 0 9 - 1 8 7 5號公報 [專利文獻2]特開2008-231505號公報 [專利文獻3]特開平6- 1 45 87 1號公報 [專利文獻4]特開昭62- 17 147號公報 【發明內容】 發明欲解決之問題 本發明係爲解決上述問題而完成者，其目的在於提供維 持高強度、硬度和韌性，並具有優異光輝性，特別是汽車 用鋁輪圈。其目的又在於提供此種鋁合金鑄造物之製造方 法。 [用以解決問題之手段] 上述問題藉由提供鋁合金鑄造物來解決，其在鑄造含有 Mg: 1·5 至 5.5重量％以下、Zn: 1_6 至 5.0 重量 ％、Si: 0.4 重量％以下、Fe: 0.4重量％以下、Cu: 0.4重量％以下、Ti : 〇_2重量％以下、B:0.1重量％以下以及66:0.1重量％以下， 其餘爲A1和不可避免的雜質所構成之鋁合金後，硏磨而構 成’其特徵在於根據115:28741測定的光澤度在1〇〇%以上。 此時，前述鋁合金鑄造物宜爲汽車用鋁輪圈。 本發明之鋁合金鑄造物宜含具有厚度爲0.5至15微米之 陽極氧化皮膜。 上述問題亦藉由提供鋁合金鑄造物之製造方法來解決， 其在纟帚造含有Mg: 1.5至5.5重量％以下、Zn: 1.6至5.0 201139696 重量％、Si : 0.4重量％以下、Fe : 0.4重量％以下、Cu : 〇·4 重量％以下、T i : 0.2重量％以下、Β ·_ 〇 . 1重量％以下以及 Be : 0.1重量％以下，其餘爲A1和不可避免的雜質所構成 之鋁合金之後’硏磨所獲得之鑄造物來構成，根據〗15: Z874 1測定的光澤度在1 〇〇%以上。 此時，前述鑄造鋁合金宜爲汽車用鋁輪圏。 前述鑄造宜爲重力鑄造。又，前述鑄造宜爲電解硏磨或 拋光硏磨。 於鑄造前述鋁合金後，宜在310〜580°C下固溶處理1至 10小時，更宜在前述固溶處理後，在100〜250 °C下時效硬 化處理1至24小時。 於本發明之鋁合金鑄造物之製造方法中，宜在鑄造前述 鋁合金而硏磨後，形成陽極氧化皮膜，更宜在鑄造前述鋁 合金而電解硏磨後，形成陽極氧化皮膜。又，在鑄造前述 鋁合金而硏磨後，亦宜透明塗裝。 [發明效果] 本發明之鋁合金鑄造物維持高強度、硬度和韌性，並具 有良好的光亮。此種鋁合金鑄造物特別可適用於汽車用鋁 輪圈。又’根據本發明之鋁合金鑄造物之製造方法，可很 簡易地製造光輝性優異之鋁合金鑄造物。 【實施方式】 [用以實施發明之形態] 本發明之銘合金鑄造物係在鑄造含有Mg: 1.5至5.5重 201139696 量％以下、Zn : 1.6至5.0重量％、S i : 0.4重量％以下' Fe : 0.4重量％以下、（：11:0.4重量％以下、1'1:0.2重量％以下、 B: 0.1重量％以下以及Be: 0.1重量％以下，其餘爲A1和 不可避免的雜質所構成之鋁合金後，硏磨而構成，根據 113:2874 1測定的光澤度在100%以上。 本發明之鋁合金鑄造物含有1.5至5.5重量％之Mg。Mg 係爲提高鋁合金鑄造物之光輝性而添加者。又，藉由Mg 同時包含Zn，使鋁合金鑄造物具有高強度和硬度。在Mg 含量不滿1.5重量％情況下，鋁合金鑄造物之強度和硬度 變得不充分。Mg含量宜在2.5重量％以上，更宜在3.5重 量％以上。另一方面，於Mg含量超過 5.5重量％情況下’ 如流動性等鑄造性變得不佳。Mg含量宜在5.3重量％以下。 本發明之鋁合金鑄造物含有1.6至5.0重量％Zn。藉由含 有Zn，可以提高該鋁合金鑄造物之強度和硬度，而不會降 低光輝性。又，Zn亦具有改善鑄造時之流動性之效果。在 Zn含量不滿1 .6重量％情況下，硬度和強度變得不充分。 Zn含量宜在2.0重量％以上，更宜在2.5重量％以上。另— 方面，在Zn含量過5.0重量％情況下，若發生粒界腐蝕’ 即韌性變得不充分。Zn含量宜在4.5重量％以下’更宜在 4 · 0重量％以下。 本發明之鋁合金鑄造物含有0.2重量％以下的以°了丨具 有微細化鋁合金鑄造物之結晶之作用，其進一步提高銘合 金鑄造物之強度及光輝性。在添加Ti之際’可單獨加Ti ’ 201139696 可與B —起添加。在Tl含量超過〇.2重量％情況下，光輝 性會降低。另一方面，Ti含量宜在0.01重量％以上。在 Ti含量不滿〇.〇1重量％情況下，有因Tl的摻混所致之結晶 微細化的作用無法顯現之虞。 本發明之鋁合金鑄造物含有0.1重量％的B。B係在添加 Ti之際，與Ti 一起添加者。例如於含有Ti作爲有效成分 時’添加TiB2情況下’Ti與B —起含於該鋁合金鑄造物中。 B與Ti同時添加時’較單獨添加Ti的情形更能提高微細化 鋁合金鑄造物之結晶之效果。B含量宜在 0.005重量％以 上。在B含量不滿0.005重量％情況下，有因B的摻混合所 致之結晶微細化的作用無法顯現之虞。 本發明之鋁合金鑄造物含有0.1重量％的Be。Be具有提 高鑄造時之流動性之效果及防止鋁合金鑄造物氧化之效 果。在Be含量超過0. 1重量％情況下，成本增高。另一方 面，Be含量宜在0.0001重量％以上。於Be含量不滿0.0001 重量％情況下，有因Be摻混所致之抗氧化效果無法顯現之 虞。 本發明之鋁合金鑄造物含有0.4重量％以下的Si。在本 發明中，Si含量較佳是盡可能小。在Si含量大於 0.4重量 %情況下，於鑄造後之鋁合金鑄造物之表面析出Si而光輝 性變得不充分。Si含量宜在0.2重量％以下，更宜者在0.15 重量％以下。Si含量通常在 〇.〇1重量％以上。完全除去A1 等中不可避免地含有之Si係有成本增高之虞。 -10- 201139696 本發明之鋁合金鑄造物含0.4重量％以下的Fe。在本發明 中’ Fe含量較佳是盡可能小。在Fe含量超過 〇·4重量％ 情況下，鋁合金鑄造物之強度、韌性、耐腐蝕及光輝性變 得不充分。Fe含量宜在0.3重量％以下，更宜爲 0·2重量％ 以下。Fe含量通常在0.01重量％以上。完全除去Α1等中不 可避免地含有之Fe有成本增高之虞。 本發明之銘合金纟毒造物含0.4重量％以下的Cu。於本發 明中’ C u含量較佳係盡可能小。於c u含量超過0.4重量％ 情況下，鋁合金鑄造物之耐腐蝕性及光輝性變成不充分。 Cu含量宜在0.2重量％以下，較佳在〇. 1重量％以下。Cu 的含量通常在0.01重量％以上。完全去除A1等不可避免地 包含的Cu有成本變高之虞。 本發明之鋁合金鑄造物含有Mg: 1.5至5.5重量％以下、 Zn: 1.6至5.0重量％、Si: 0.4重量％以下、Fe: 0.4重量％ 以下、Cu: 0.4重量％以下、Ti: 0.2重量％以下、B: 0.1重 量％以下以及Be: 0.1重量％以下。其餘爲A1和不可避免的 雜質構成鋁合金，鑄造後，藉由硏磨所獲得之鑄造物來製 造。 製造本發明之鋁合金鑄造物之鑄造方法並未特別限制。 可採用一般所用的鑄造法，例如，砂模鑄造法、金屬模重 力_造法、金屬模重力傾斜鑄造法等重力鑄造法；低壓鑄 造法；模具鑄造法等加壓鑄造法等。其中，較佳爲重力鑄 造法或低壓鑄造法，尤佳爲重力鑄造法。於重力鑄造法中， -11 - 201139696 較佳爲金屬模重力鑄造法或金屬模重力傾斜鑄造 爲金屬模重力傾斜鑄造法。鑄造之際所用之熔融 用藉由平常所用方法將原料調製成如上述合金成 融金屬之溫度雖是根據鑄造方法或合金之組成 但’金屬模重力傾斜鑄造法情況下，通常是6 8 0三 本發明之鋁合金鑄造物較佳係在鑄造鋁合金後 自固溶處理或時效硬化處理之至少一者的熱處理 係固溶處理。固溶處理係在未熔解鑄造後之鋁合 程度之高溫下保持，合金之析出成分充分熔入基 狀態後，淬火成過飽和固溶體之處理。此時之保 爲310〜580 °C，更宜爲400〜480 °C。保持時間宜 小時，更宜爲2至8小時。雖然固溶處理亦可在 金鑄造物後進行，惟從光輝性的觀點看來，較佳 前固溶處理。 又，尤佳係固溶處理鋁合金鑄造物後進行時 理。時效硬化處理係使藉由固溶處理成爲過飽和 鋁合金鑄造物轉移到熱穩定平衡狀態之熱處理。 持溫度宜爲100〜250°C，更宜爲120〜200°C。保 宜爲1至2 4小時，更宜爲2至12小時。 本發明之鑄造鋁合金藉由在固溶處理後進行時 熱處理後，進一步提高強度、硬度及韌性，同時 高光輝性。 法，尤佳 金屬可使 分者。熔 來調整， ΐ 7 80oC。 ，施以選 ，尤佳者 金鑄造物 底之固溶 持溫度宜 爲1至10 硏磨鋁合 係在硏磨 效硬化處 固溶體之 此時之保 持時間是 效硬化之 進一步提 -12- 201139696 製造本發明之鋁合金鑄造物時之硏磨方之 制。可採用一般所使用的硏磨法’例如，電 拋光硏磨、濕式拋光硏磨等拋光硏磨；化學 光等。從光輝性的觀點看來，較佳係電解硏磨 拋光硏磨中尤佳者爲濕式拋光硏磨。在硏磨 化皮膜情況下，較佳係電解硏磨。在電解硏 氧化皮膜情況下，形成陽極氧化皮膜所造成 非常小。 本發明之鋁合金鑄造物宜具有厚度爲 0.5-極氧化皮膜。此時之陽極氧化皮膜形成於硏 鑄造物之表面上。陽極氧化皮膜的形成方ί 制。可使用對一般鋁合金之陽極氧化皮膜形 液列舉之例如有磷酸、硫酸、硼酸或草酸等 使用之電源未特別有限’可能爲直流電源， 源。 藉由具有此種陽極氧化皮膜，提高鋁合金 蝕性。在對鋁合金鑄造物進行透明塗裝情況 著力變強。在陽極氧化皮膜之厚度超過15 有鋁合金鑄造物之光輝性不充分之虞。陽極 10微米以下’更宜在4微米以下。在陽極氧 不滿0.5微米情況下’有無法獲得抗腐蝕性 陽極氧化皮膜的厚度宜在1微米以上，更宜 上。 έ並未特別限 解硏磨、乾式 硏磨；滾桶拋 及拋光硏磨。 後形成陽極氧 磨後形成陽極 之光輝性降低 -15微米之陽 磨後之鋁合金 去並未特別限 成方法。電解 酸或其鹽等。 亦可爲交流電 鑄造物之耐腐 下，塗膜之附 微米情況下， 氧化皮膜宜在 化皮膜之厚度 之效果之虞。 在1. 5微米以 -13- 201139696 在本發明中，尤佳者係在鑄造前述鋁合金鑄造物並電解硏 磨之後，形成陽極氧化皮膜。具有如此獲得之陽極氧化皮 膜之鋁合金鑄造物具有非常優異的光輝性。由於電解硏磨 後的表面非常乾淨，因此，被認爲均勻形成陽極氧化皮膜。 然後，被認爲藉由形成均一陽極氧化皮膜，可獲得優異的 光輝性。又，電解很簡便。另外’在後述實施例中亦呈現 電解硏磨後形成陽極氧化皮膜之顯著效果。電解硏磨後形 成陽極氧化皮膜所得到的鑄造物（實施例5)具有優異的光 輝性。 又本發明之鋁合金鑄造物亦宜在鑄造前述鋁合金並硏磨 之後，透明塗裝。透明塗裝可在硏磨後之鋁合金鑄造物之 表面上進行，亦可在硏磨後而形成陽極氧化皮膜之鋁合金 鑄造物之表面上進行。從耐腐蝕性和塗膜之附著力的觀點 看來，在硏磨後而形成陽極氧化皮膜之鋁合金鑄造物之表 面上進行透明塗裝較佳。透明塗裝用塗料可使用一般透明 塗裝用塗料。列舉之例如有丙烯酸樹脂塗料、環氧樹脂塗 料，聚酯樹脂塗料、氟樹脂塗料等塗料。雖然其可爲室溫 下蒸發溶劑而乾燥之常溫乾燥型塗料，不過，從防止剝離 的觀點看來，較佳係藉由加熱或紫外線照射反應硬化之反 應硬化型塗料。塗裝方法可適當採用靜電塗裝，噴塗，塗 刷、電沉積塗裝等。 如此獲得之本發明鋁合金鑄造物根據]IS ·· Z 8 7 4 1測得的 光澤度在1〇〇以上。本發明之鋁合金鑄造物藉由含有上述 -14- 201139696 量之 Mg、Zn、Si、Fe、Cu、Ti、B 及 Be，其餘爲 A1 可避免之雜質構成之組成，經過鑄造，硏磨所得的鋁 鑄造物維持高強度、硬度和韌性，同時具有優異的光蹈 光澤度宜在150%以上，更宜在250%以上，尤佳在 以上，特佳在4 5 0 %以上。 本發明之鋁合金鑄造物適用於汽車用鋁輪圈。由於 明之鋁合金鑄造物維持高強度、韌性和硬度，同時具 異光輝性，因此’如此構成之汽車用鋁輪圈在具有與 處理之習知品同等質感之金屬光澤的設計性上很優異 需鍍C r處理所造成之成本節省效果很大，由於不使 Cr處理所需之有害材料，因此亦減低環境負荷，亦提 合金之回收性。 又’本發明之鋁合金鑄造物可適用於以如汽車、二輪 運輸設備爲代表，自行車、釣具等休閒用品、建材、 設備或日用品等各個領域。 [實施例] 以下進一步詳細說明本發明之實施例。 [光澤度之測定方法] 鋁合金鑄造物之表面光輝性以根據】丨s : Z 8 7 4 1之鏡 澤度測定方法所測定之光澤度作爲指標來評估。光澤 定條件如下。 測定條件：G S (6 0 °)BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum alloy casting which is composed of a honing after casting an aluminum alloy and which is excellent in brightness, and particularly relates to an aluminum rim for automobiles. Further, there is a method of manufacturing such an aluminum alloy casting. [Prior Art] Ming alloys are used in transportation equipment such as automobiles and two-wheelers; leisure products such as bicycles and fishing tackles; building components; electronic machines or daily necessities. Due to the high strength of the aluminum alloy in the alloy material, the aluminum alloy casting is suitable for applications requiring strength and lightness. In particular, in transportation equipment such as automobiles and two-wheeled vehicles, since the demand for weight reduction is high from the viewpoints of fuel and the environment, etc., the use of an aluminum alloy casting as such a component is increasing. On the other hand, in the case where an aluminum alloy casting is used as an external part of a transportation device, in addition to mechanical properties, design is often required. As one of the design techniques for imparting such an aluminum alloy casting, it is effective to improve the brightness by obtaining texture and beauty. In particular, automotive aluminum rims have a high degree of design due to their design performance that significantly affects their commodity prices. On the other hand, aluminum rims for automobiles require high safety. For this reason, aluminum alloys for aluminum rims for automotive applications have been mainly used for Al-Si-Mg alloys such as AC4CH which are excellent in strength and hardness. However, the hard precipitates of the Al-Si-Mg alloy due to Si segregation appear on the surface, so that it is difficult to obtain good brilliance even if honing is performed. An Al-Mg alloy such as AC7A is widely used for an aluminum alloy having excellent brightness. This Al-Mg-based alloy, although excellent in the high brightness of -4-201139696, has poor castability and insufficient strength and hardness. Moreover, it is not even possible to improve the strength and hardness by heat treatment. Therefore, the aluminum rims for casting automobiles used so far have been formed with enamel chrome for decoration using A^Si_Mg-based alloy casting, and have been designed. However, in the case of forming chrome plating, in addition to the high cost of environmental problems due to the use of harmful substances such as cyanide and hexavalent chromium, there is also a problem in the recovery property of aluminum alloy. On the other hand, a number of measures have been proposed to maintain strength and the like while improving the brightness of the surface of the aluminum alloy casting. Patent Document 1 describes an aluminum die-cast alloy material containing Si: 0.2% by mass, Mg: 2.2 to 4.0% by mass, Fe: 0.25 to 〇·4% by mass, and manganese: 0.05% by mass 'Zn: 0.5 to 1.5% by mass %, Cu: 〇.〇5 mass% or less 'Ti: 0_03 mass% or less, and the rest is composed of A1 and unavoidable impurities. In the examples, it is described that after the produced aluminum die-cast alloy material is mirror-polished, an aluminum sulfate-resistant aluminum die-cast alloy material having a thickness of 5 μm is formed. However, the tintability of the die-cast aluminum alloy material is insufficient. Patent Document 2 describes a bright aluminum alloy material, which has a mass% of Si: 0.005 to 0.03 %, Fe: 0.005 to 〇.〇5 %, Mg: 2.5 to 5_0%, Cr: 0.10~0 0.30%, Cu: 0. 〇l~〇1%, Ti: 0.02% or less, Be: 0.001 to 0. 02, and the balance is composed of A1 and unavoidable impurities. The aluminum alloy material is obtained by adjusting the dissolution of the matrix and the precipitate, and the dissolution of the honing surface is uniform and smooth, so that the brightness is obtained. Moreover, by the heat treatment under predetermined conditions, the brightness is brought about. This aluminum alloy material _ 201139696 has been described as suitable for automotive rims. However, the brightness of aluminum alloy materials is still insufficient. In the patent document, Zn is 4.5 to 6.5% by weight, Mg is 0.4 to 1 2% by weight, Cu is 0.05 to 0.40% by weight, Zr〇.〇5 is 〇.25% by weight, and pe is 15% by weight or less. It is composed of A1 and unavoidable impurities, and is characterized by a ratio of Zn content to Mg content of 6 to 12, and a ratio of Fe content to Si content of Fe/Si of 1.5 or more, which is excellent in brightness and hot workability. Strength aluminum alloy. In the examples, the aluminum alloy material of the hollow material obtained by the age-hardening treatment after the ingot of the composition is homogenized, and the aluminum alloy material exhibits excellent mechanical properties and brightness resistance to stress corrosion resistance. And hot workability. However, the brightness of aluminum alloy materials is still insufficient. Patent Document 4 describes that Mg2 to 6%, Zn.l to 5%, Ti0.0 3 to 0.4% ' and Ζι.0.03% to 0.4%, MnO.10 to 1.0%, and Cr0.05 to 0.6% are contained. Any one or more, and the sum of Ti and Zr is 0.4% or less, and the balance is an aluminum alloy casting composed of A1 and the accompanying impurities. Such an aluminum alloy maintains a variety of properties of the A1-Mg system such as stress corrosion resistance, anodizing property, and machinability, and castability, mechanical properties, and weldability are improved. Further, the automobile rim is described in many examples of the use of the aluminum alloy for casting. In the examples, the aluminum alloy cast by alkali etching was chemically honed with a phosphoric acid nitric acid solution to form an anodized film having a thickness of 10 μm. The surface at this time is beautiful silvery white. However, the luster of such aluminum alloys is still insufficient. [Patent Document 1] JP-A-2008-231505 (Patent Document 3) JP-A-2008-231505 (Patent Document 3) [Patent Document 4] Japanese Laid-Open Patent Publication No. JP-A No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. And has excellent brightness, especially for automotive aluminum wheels. The object is also to provide a method of manufacturing such an aluminum alloy casting. [Means for Solving the Problem] The above problem is solved by providing an aluminum alloy casting, which contains Mg: 1.5 to 5.5 wt%, Zn: 1_6 to 5.0 wt%, and Si: 0.4 wt% or less in casting. Fe: 0.4% by weight or less, Cu: 0.4% by weight or less, Ti: 〇_2% by weight or less, B: 0.1% by weight or less, and 66: 0.1% by weight or less, and the balance is A1 and an unavoidable impurity. Thereafter, it is constituted by honing, which is characterized in that the gloss measured according to 115:28741 is 1% or more. At this time, the aluminum alloy casting material is preferably an aluminum rim for automobiles. The aluminum alloy casting of the present invention preferably contains an anodized film having a thickness of 0.5 to 15 μm. The above problem is also solved by providing a method for producing an aluminum alloy casting, which contains Mg: 1.5 to 5.5% by weight, Zn: 1.6 to 5.0, 2011, 39,696% by weight, Si: 0.4% by weight or less, Fe: 0.4. Weight% or less, Cu: 〇·4% by weight or less, T i : 0.2% by weight or less, Β·_ 〇. 1% by weight or less, and Be: 0.1% by weight or less, and the balance of A1 and unavoidable impurities After the alloy is formed by honing the obtained casting, the gloss measured according to 〖15: Z874 1 is above 1%. At this time, the aforementioned cast aluminum alloy is preferably an aluminum rim for automobiles. The aforementioned casting is preferably gravity casting. Further, the foregoing casting is preferably electrolytic honing or polishing honing. After casting the aluminum alloy, it is preferably solution-treated at 310 to 580 ° C for 1 to 10 hours, and more preferably after aging treatment at 100 to 250 ° C for 1 to 24 hours. In the method for producing an aluminum alloy cast product according to the present invention, it is preferred to form an anodic oxide film after casting the aluminum alloy and honing, and it is more preferable to form an anodic oxide film after electrolytic honing by casting the aluminum alloy. Further, after the aluminum alloy is cast and honed, it is also suitable for transparent coating. [Effect of the Invention] The aluminum alloy casting of the present invention maintains high strength, hardness and toughness, and has good light. Such an aluminum alloy casting is particularly suitable for use in automotive automotive rims. Further, according to the method for producing an aluminum alloy cast product of the present invention, an aluminum alloy cast product excellent in brightness can be easily produced. [Embodiment] [Formation for Carrying Out the Invention] The casting alloy of the present invention contains Mg: 1.5 to 5.5 weight 201139696 mass% or less, Zn: 1.6 to 5.0 weight%, and S i : 0.4 weight% or less in casting. Fe: 0.4% by weight or less, (: 11: 0.4% by weight or less, 1'1: 0.2% by weight or less, B: 0.1% by weight or less, and Be: 0.1% by weight or less, and the balance is A1 and unavoidable impurities. After the aluminum alloy is honed, the gloss measured according to 113:2874 1 is 100% or more. The aluminum alloy casting of the present invention contains 1.5 to 5.5% by weight of Mg. Mg is used to improve the brightness of the aluminum alloy casting. In addition, since Mg contains Zn at the same time, the aluminum alloy casting has high strength and hardness. When the Mg content is less than 1.5% by weight, the strength and hardness of the aluminum alloy casting become insufficient. 2.5% by weight or more, more preferably 3.5% by weight or more. On the other hand, when the Mg content exceeds 5.5% by weight, the casting property such as fluidity becomes poor. The Mg content is preferably 5.3 wt% or less. The aluminum alloy castings contain 1.6 to 5. 0% by weight of Zn. By containing Zn, the strength and hardness of the cast aluminum alloy can be improved without reducing the brightness. Further, Zn also has the effect of improving the fluidity during casting. The Zn content is less than 1.6. In the case of % by weight, the hardness and strength become insufficient. The Zn content is preferably 2.0% by weight or more, more preferably 2.5% by weight or more. On the other hand, in the case where the Zn content is more than 5.0% by weight, grain boundary corrosion occurs. That is, the toughness is insufficient. The Zn content is preferably 4.5% by weight or less, more preferably 4,000% by weight or less. The aluminum alloy casting of the present invention contains 0.2% by weight or less of the fine aluminum alloy casting. The role of crystallization, which further enhances the strength and brightness of the alloy castings. When Ti is added, it can be added separately with Ti '201139696, which can be added with B. In the case where the Tl content exceeds 〇.2% by weight, the brilliance On the other hand, the Ti content is preferably 0.01% by weight or more. In the case where the Ti content is less than 〇1% by weight, the effect of crystal refinement due to the blending of T1 cannot be revealed. Invented aluminum The casting contains 0.1% by weight of B. B is added with Ti when Ti is added. For example, when Ti is contained as an active ingredient, 'Ti and B are added to the aluminum alloy casting when TiB2 is added. When B and Ti are simultaneously added, the effect of crystallization of the fine aluminum alloy casting can be improved more than when Ti is added alone. The B content is preferably 0.005% by weight or more. In the case where the B content is less than 0.005% by weight, there is a cause B. The effect of crystal refinement caused by the mixing of the mixture cannot be revealed. The aluminum alloy casting of the present invention contains 0.1% by weight of Be. Be has the effect of improving the fluidity at the time of casting and preventing the oxidation of the aluminum alloy casting. In the case where the Be content exceeds 0.1% by weight, the cost increases. On the other hand, the Be content is preferably 0.0001% by weight or more. In the case where the content of Be is less than 0.0001% by weight, the antioxidant effect due to the blending of Be cannot be exhibited. The aluminum alloy casting of the present invention contains 0.4% by weight or less of Si. In the present invention, the Si content is preferably as small as possible. When the Si content is more than 0.4% by weight, Si is precipitated on the surface of the cast aluminum alloy after casting, and the glittering property is insufficient. The Si content is preferably 0.2% by weight or less, more preferably 0.15% by weight or less. The Si content is usually at most 重量1% by weight. The cost of the Si system inevitably contained in A1 or the like is completely removed. -10- 201139696 The aluminum alloy casting of the present invention contains 0.4% by weight or less of Fe. In the present invention, the 'Fe content is preferably as small as possible. When the Fe content exceeds 〇·4% by weight, the strength, toughness, corrosion resistance and brightness of the aluminum alloy cast are insufficient. The Fe content is preferably 0.3% by weight or less, more preferably 0.2% by weight or less. The Fe content is usually 0.01% by weight or more. The removal of Fe, which is inevitably contained in Α1, etc., completely increases the cost. The alloy of the present invention contains 0.4% by weight or less of Cu. In the present invention, the 'Cu content is preferably as small as possible. When the content of c u exceeds 0.4% by weight, the corrosion resistance and the brightness of the aluminum alloy cast are insufficient. The content of Cu is preferably 0.2% by weight or less, preferably 0.1% by weight or less. The content of Cu is usually 0.01% by weight or more. The removal of Cu, which is inevitably contained in the complete removal of A1, has a high cost. The aluminum alloy casting of the present invention contains Mg: 1.5 to 5.5% by weight or less, Zn: 1.6 to 5.0% by weight, Si: 0.4% by weight or less, Fe: 0.4% by weight or less, Cu: 0.4% by weight or less, and Ti: 0.2 by weight. % or less, B: 0.1% by weight or less, and Be: 0.1% by weight or less. The remaining A1 and the inevitable impurities constitute an aluminum alloy, which is produced by honing the cast after casting. The casting method for producing the aluminum alloy casting of the present invention is not particularly limited. A casting method generally used, for example, a gravity casting method such as a sand mold casting method, a metal mold gravity method, a metal mold gravity inclined casting method, a low pressure casting method, a die casting method, and the like can be employed. Among them, a gravity casting method or a low pressure casting method is preferred, and a gravity casting method is preferred. In the gravity casting method, -11 - 201139696 is preferably a metal mold gravity casting method or a metal mold gravity inclined casting method as a metal mold gravity inclined casting method. The melting used in the casting is used to prepare the raw material into a molten metal by the usual method, although the temperature is according to the casting method or the composition of the alloy, but in the case of the metal mold gravity inclined casting method, it is usually 6 8 0 3 The aluminum alloy casting of the present invention is preferably a solid solution treatment of at least one of a solution treatment or an age hardening treatment after casting the aluminum alloy. The solution treatment is maintained at a high temperature of aluminum bonding after the unmelted casting, and the precipitation component of the alloy is sufficiently melted into the base state, and then quenched into a supersaturated solid solution. At this time, the protection is 310~580 °C, more preferably 400~480 °C. The holding time should be small, preferably 2 to 8 hours. Although the solution treatment can be carried out after the gold casting, it is preferred to be solution treated from the viewpoint of brightness. Further, it is particularly preferable to carry out the treatment after solid solution treatment of the aluminum alloy casting. The age hardening treatment is a heat treatment in which the aluminum alloy casting is transferred to a thermally stable equilibrium state by solution treatment. The holding temperature is preferably 100 to 250 ° C, more preferably 120 to 200 ° C. The protection is from 1 to 24 hours, more preferably from 2 to 12 hours. The cast aluminum alloy of the present invention further improves strength, hardness and toughness, and high gloss, by heat treatment after solution treatment. Law, especially good metal can be divided. Melt to adjust, ΐ 7 80oC. The temperature of the solid solution of the gold casting base should be 1 to 10. The retention time of the solid solution in the honing hardening zone is further enhanced by the hardening of the hardening. - 201139696 Manufacture of the honing side of the aluminum alloy casting of the present invention. The honing method generally used may be employed, for example, polishing honing such as electric polishing honing, wet polishing honing, chemical light, and the like. From a bright point of view, it is preferred that the electrolytic honing polishing honing is a wet polishing honing. In the case of honing the film, electrolytic honing is preferred. In the case of electrolytic ruthenium oxide film, the formation of an anodic oxide film is very small. The aluminum alloy casting of the present invention preferably has a thickness of 0.5-polar oxide film. The anodized film at this time is formed on the surface of the tantalum casting. The formation of the anodized film is made. A power source such as phosphoric acid, sulfuric acid, boric acid or oxalic acid which is used for the anodic oxide coating of a general aluminum alloy may be used, and the power source used may be a DC power source. By having such an anodic oxide film, the corrosion resistance of the aluminum alloy is improved. In the case of transparent coating of aluminum alloy castings, the strength is becoming stronger. When the thickness of the anodized film exceeds 15, the brightness of the aluminum alloy casting is insufficient. The anode is preferably less than 10 microns or less than 4 microns. In the case where the anode oxygen is less than 0.5 μm, the corrosion resistance is not obtained. The thickness of the anodized film is preferably 1 μm or more, more preferably. έ does not specifically limit honing, dry honing; drum throwing and polishing honing. After the formation of the anodic oxygen, the radiance of the anode is reduced by -15 μm. The polished aluminum alloy is not particularly limited. Electrolytic acid or its salt. It can also be used for the corrosion resistance of the AC casting. When the coating film is attached to the micron, the oxide film should be applied to the thickness of the film. In the present invention, it is particularly preferred to form an anodized film after casting the aforementioned aluminum alloy casting and electrolytically honing. The aluminum alloy casting having the anodized film thus obtained has very excellent brightness. Since the surface after electrolytic honing is very clean, it is considered that the anodic oxide film is uniformly formed. Then, it is considered that excellent brightness can be obtained by forming a uniform anodized film. Also, electrolysis is simple. Further, in the examples described later, a remarkable effect of forming an anodic oxide film after electrolytic honing is also exhibited. The cast product obtained by electrolytic honing to form an anodized film (Example 5) had excellent brightness. Further, the aluminum alloy casting of the present invention is also preferably applied after casting the aluminum alloy and honing it. The clear coating can be carried out on the surface of the honed aluminum alloy casting or on the surface of the aluminum alloy casting which forms the anodized film after honing. From the viewpoint of corrosion resistance and adhesion of the coating film, it is preferred to perform transparent coating on the surface of the aluminum alloy casting in which the anodized film is formed after honing. For the transparent coating, a general transparent coating can be used. Examples thereof include acrylic resin coatings, epoxy resin coatings, polyester resin coatings, and fluororesin coatings. Although it may be a room temperature drying type coating which is dried by evaporating a solvent at room temperature, it is preferably a reaction-curing type coating which is hardened by heating or ultraviolet irradiation from the viewpoint of preventing peeling. The coating method can be suitably applied by electrostatic coating, spraying, painting, electrodeposition coating or the like. The aluminum alloy casting of the present invention thus obtained has a gloss of 1 Å or more as measured according to [IS··· Z 8 7 4 1 . The aluminum alloy casting of the present invention has the composition of impurities, such as Mg, Zn, Si, Fe, Cu, Ti, B and Be, which are contained in the above-mentioned-14-201139696, and the remainder is a composition which can be avoided by A1, and is obtained by casting and honing. The aluminum casting maintains high strength, hardness and toughness, and has excellent gloss and gloss of 150% or more, more preferably 250% or more, especially preferably above, and particularly preferably above 450%. The aluminum alloy casting of the present invention is suitable for aluminum rims for automobiles. Since the aluminum alloy castings of Ming Ming maintain high strength, toughness and hardness, and have different brightness, the aluminum rims of the automobile thus constructed are excellent in the design of metallic luster having the same texture as the conventional products to be processed. The cost savings caused by the r treatment are very large, and since the harmful materials required for the treatment of the Cr are not made, the environmental load is also reduced, and the recovery property of the alloy is also improved. Further, the aluminum alloy casting of the present invention can be applied to various fields such as bicycles, two-wheeled transportation equipment, bicycles, fishing tackles, and the like, leisure articles, building materials, equipment, and daily necessities. [Examples] Hereinafter, examples of the invention will be described in further detail. [Method for Measuring Gloss] The surface brightness of an aluminum alloy cast was evaluated by using the gloss measured by the spectroscopic measurement method of 丨s : Z 8 7 4 1 as an index. The gloss conditions are as follows. Measurement conditions: G S (60 °)
測定設備：村上色彩硏究所有限公司製數位光澤計I 和不 合金 【性。 3 00% 本發 有優 鑛Cr 。無 用鍍 高鋁 車等 電子 面光 度測Measuring equipment: Murakami Color Research Institute Co., Ltd. made digital gloss meter I and non-alloy. 3 00% The hair has excellent ore Cr. Unused high-aluminum car and other electronic surface light measurement
(GM -15- 201139696 -3D)」 [拉伸強度，耐力及拉伸之測定方法] JIS :使用根據H5 202之舟型金屬模試片鑄模，鑄造鋁合 金。按照各實施例之條件，對所獲得之鋁合金進行熱處理、 切削加工，硏磨等處理’製作根據〗IS: Z2201之第4號試 片。根據】IS : Z224 1，分別測定所獲得試片之拉伸強度、 耐力和拉伸。 [布氏硬度測定方法] 根據ns: Z2243如以下測定布氏硬度。使用JIS: H5202 之舟型金屬模試片鑄模鑄造錦合金。按照各實施例之條 件，對所得鋁合金鑄造物進行熱處理、切削加工、硏磨等 處理’製作縱20毫米、橫20毫米、高1〇毫米之試片。將 直徑10毫米之超硬合金球壓頭壓入試片的平滑表面，直至 達到指定的試驗力4.903 kN，以指定的試驗力維持1〇至15 秒。在解除試驗力之後，測定留在表面上之凹陷之直徑， JIS : Z2243之附件B之布氏硬度計算表讀取A布氏硬度。 [輪盤之性能的評估方法] 使用16英寸之汽車用輪盤之金屬模，根據Jis:D4103, 測定按照各實施例之條件製作之輪盤之旋轉彎曲耐久試 驗、徑向載荷耐久試驗及乘用車用衝擊試驗。 實施例1 將表1所示成分（合金1)之熔融金屬（730°C)澆鑄於根據 JIS : H5202之舟型金屬模試片鑄模，藉由金屬模傾斜重力 -16 - 201139696 鑄造，鑄造鋁合金鑄造物。在43 0°C下保持從金屬模取出之 鋁合金鑄造物6小時之後，淬火（水冷）固溶處理後，在1 6(TC 下進行時效硬化處理8個小時。切削加工經過熱處理之鋁 合金鑄造物，製作縱30毫米、橫35毫米、高20毫米之試 片。電解硏磨之前置處理係在將鋁合金鑄造物浸漬於氫氧 化鈉系脫脂液中1 0分鐘後，浸漬於5 %的硝酸3 0秒，除去 污斑。電解硏磨係於磷酸和硫酸之混合溶液中對經過前置 處理之鋁合金鑄造物（在65 °C下水浴溫度）進行陽極電解1 分鐘。測定所獲得鋁合金鑄造物之光澤。此時鋁合金鑄造 物中的測定位置爲藉由前述切削加工加工成平面狀之部 分。於表2中顯示其結果。又，在切削加工中，除了成形 爲根據〗IS : Z220 1之第4號試片的形狀外，分別測定如同 供光澤度測定者製作之鋁合金鑄造物之拉伸強度、耐力和 拉伸。於表2中顯示其結果。又，在切削加工中，除了成 形爲縱20毫米、橫20毫米、高10毫米外，測定如同供光 澤度測定者製作之鋁合金鑄造物之硬度。於表2中顯示其 結果。 比較例1 除了不電解硏磨外，如同實施例1製作鋁合金鑄造物。於 表2中顯示其結果。如果沒有進行硏磨則光澤度顯著降低。 比較例2 除了禱造之際所用的溶融金屬係表1戶斤不之組成（合金 3 )，固熔處理之條件爲5 3 5 t、3小時，時效硬化處理之條 -17 - 201139696 件爲1 60°C、4小時外，如同實施例1，製作鋁合 測定光澤度。於表2中顯示其結果。又，於切 除了成形爲根據〗IS: Z2201之第4號試片的形 測定如同供光澤度測定者製作之鋁合金鑄造 度、耐力和拉伸。於表2中顯示其結果。又， 中，除了成形爲縱20毫米、橫20毫米、高10 定如同供光澤度測定者製作之鋁合金鑄造物之 2中顯示其結果。該鋁合金鑄造物於電解硏磨 濁，無法獲得光輝性。 實施例2 除了替代電解硏磨，而以濕式拋光硏磨切削 合金鑄造物外，如同實施例1，製作鋁合金鑄 光澤度。於表2中顯示其結果。 實施例3 除了鑄造之際所用的熔融金屬係表1所示；; 2)，替代電解硏磨，而以濕式拋光硏磨切削加 金鑄造物外，如同實施例1，製作銘合金鑄造 澤度。 於表2中顯示其結果。又，在切削加工中， 據JIS : Z2201之第4號試片的形狀外，分別測 澤度測定者製作之鋁合金鑄造物之拉伸強度 伸。於表2中顯示其結果。又，於切削加工中 爲縱20毫米、橫20毫米、高1 〇毫米外，測定 -金鑄造物， 削加工中， 狀外，分別 物之拉伸強 於切削加工 毫米外，測 硬度。於表 後，表面白 加工後之鋁 造物，測定 匕組成（合金 工後之鋁合 物，測定光 除了成形根 定如同供光 、耐力和拉 ’除了成形 如同供光澤 -18- 201139696 度測定者製作之鋁合金鑄造物之硬度。於表2中顯示其結 果。 比較例3 除了鑄造之際所用的熔融金屬係表1所示之組成（合金 3 )，固熔處理之條件爲5 3 5 °C、3小時，時效硬化處理之條 件爲1 60°C、4小時，並替代電解硏磨，而以濕式拋光硏磨 切削加工後之鋁合金鑄造物外，如同實施例1，製作鋁合 金鑄造物，測定光澤度。於表2中顯示其結果。將此種鋁 合金鑄造物之光澤度與在同條件下濕式抛光之本發明之鋁 合金鑄造物（實施例2)相較，光澤度較差 很多。 實施例 4 除了替代電解硏磨，而以化學硏磨脫脂及除去污斑之鋁 合金鑄造物外，如同實施例1，製作鋁合金鑄造物，測定 光澤度。且，化學硏磨係於浴溫95 °C之化學硏磨處理液（奧 野製藥工業有限公司）浸漬1分鐘。於表2中顯示其結果。 實施例5 如同實施例1，進行鋁合金鑄造物之製作，直到電解硏 磨程序結束爲止。於電解硏磨後，將硏磨溶液中之鋁合金 鑄造物移至裝入陽極氧化處理溶液之浴槽，進行陽極氧化 處理。陽極氧化處理使用直流電源當電源，使用溶解A15g / L作爲電解液之硫酸水溶液（180克/升），以12.5V通電進 行1分鐘。所形成陽極氧化皮膜的厚度爲2/zm。如同實施 -19- 201139696 例1’測定該鋁合金鑄造物之光澤度。於表2中顯示其結 果。 比較例4 除了使用表1所示之組成（合金3)之熔融金屬，固熔處理 之條件爲5 3 5 °C、3小時，時效硬化處理之條件爲160°C、4 小時外，如同實施例1，進行鋁合金鑄造物之製作，直到 電解硏磨程序結束爲止。於電解硏磨後，將硏磨溶液中之 鋁合金鑄造物移至裝入陽極氧化處理溶液之浴槽，進行陽 極氧化處理。陽極氧化處理使用直流電源當電源，使用溶 解Al 5 g / L作爲電解液之硫酸水溶液（1 8 0克/升），以1 2.5 V 通電進行1分鐘。所形成陽極氧化皮膜之厚度爲2微米。 如同實施例1，測定該鋁合金鑄造物之光澤度。於表2中 顯示其結果。此情形之鋁合金鑄造物之光澤度顯著降低。 實施例6、7 除了替代電解硏磨，而以濕式拋光硏磨切割後的鋁合金 鑄造物外，如同實施例1，進行鋁合金鑄造物之製作，直 到濕式硏磨程序結束爲止。將濕式拋光硏磨後之鋁合金鑄 造物浸漬於氫氧化鈉系脫脂液，在除去硏磨劑或油分等 後，供陽極氧化處理。陽極氧化處理使用直流電源當電源， 使用溶解A15g / L作爲電解液之硫酸水溶液（180克/升）， 以12.5V通電進行1分鐘（實施例6)或20分鐘（實施例7)。 所形成之陽極氧化皮膜之厚度爲2微米（實施例6)或10微 米（實施例7)。如同實施例1，測定該鋁合金鑄造物之光澤 -20- 201139696 度。於表2中顯示其結果。 實施例8 除了不進行熱處理（固溶處理和時效硬化處理），如同實 施例1，製作鋁合金鑄造物，測定光澤度。又，在切削加 工中’除了成形爲根據〗IS : Z22 01之第4號試片的形狀外， 分別測定如同供光澤度測定者製作之鋁合金鑄造物之拉伸 強度、耐力和拉伸。於表2中顯示其結果。又，於切削加 工中’除了成形爲縱20毫米、橫20毫米、高1〇毫米外， 測定如同供光澤度測定者製作之鋁合金鑄造物之硬度。於 表2中顯示其結果。 比較例5 除了不進行熱處理（固溶處理和時效硬化處理），不電解硏 磨外’如同實施例1，製作鋁合金鑄.造物，測定光澤度。 於表2中顯示其結果。於不進行硏磨情況下，光澤度顯著 降低。 實施例9 除7不進行熱處理（固溶處理和時效硬化處理），替代電解 研1 @ ’而以濕式拋光硏磨切削加工後之鋁合金鑄造物外， 如同實施例1，製作鋁合金鑄造物，測定光澤度。於表2 中顯示其結果。 比較例6 # 7鑄造之際所用的熔融金屬係表1所示之組成（合金 4) ’ T進行熱處理（固溶處理和時效硬化處理），替代電解硏 -21- 201139696 磨’濕式拋光切削加工後之鋁合金鑄造物外，如同實施例 1，製作鋁合金鑄造物，測定光澤度。又，於切削加工中， 除了成形爲根據JIS : Z2201之第4號試片的形狀外，分別 測定如同供光澤度測定者製作之鋁合金鑄造物之拉伸強 度、耐力和拉伸。於表2中顯示其結果。又，於切削加工 中’除了成形爲縱20毫米、橫20毫米、高1 〇毫米外，測 定如同供光澤度測定者製作之鋁合金鑄造物之硬度。於表 2中顯示其結果。 實施例 10 除了不進行熱處理（固溶處理和時效硬化），替代電解硏 磨’而以化學硏磨脫脂及除去污斑之鋁合金鑄造物外，如 同實施例1，製作鋁合金鑄造物，測定光澤度。且，化學 拋光係浸漬於浴溫9 5 °C (奧野製藥工業有限公司）中1分 鐘。於表2中顯示其結果。 參考例1 對比較例3之鋁合金鑄造物進行鍍Cr處理，測定光澤 度。於表2中顯示其結果。 [表1 ] 合金 Mg 重量％ 2 η 重量％ Si 重量％ F e 重量％ C u 重量％ T i 重量％ B 重量％ Be 重量％ A I 1) 1 4.73 3.03 0.08 0.18 0. 06 0.10 0.05 0.002 殘餘' 2 5.10 2.40 0.10 0.16 0.09 0. 08 0.04 0.002 殘餘 3 (AC4CH 相當） 0.34 0.01 6. 94 0.14 0.00 0.12 0.06 0.000 殘餘 4 (AC7A相當） 5.16 0.01 0.06 0.12 0.02 0.01 0.00 0.002 殘餘 υ含有不可避免的雜質 -22- 201139696 【<ν¥(GM -15- 201139696 -3D)" [Determination of Tensile Strength, Endurance and Tensile] JIS: A cast aluminum alloy was cast using a boat-type metal mold test piece according to H5 202. According to the conditions of the respective examples, the obtained aluminum alloy was subjected to heat treatment, cutting, honing, etc., to produce a test piece No. 4 according to IS: Z2201. The tensile strength, endurance and elongation of the obtained test piece were measured according to ???IS: Z224 1, respectively. [Brinell hardness measurement method] The Brinell hardness was measured as follows according to ns: Z2243. The alloy was cast by a boat-type metal mold piece of JIS: H5202. According to the conditions of the respective examples, the obtained aluminum alloy casting was subjected to heat treatment, cutting, honing, etc. to prepare test pieces of 20 mm in length, 20 mm in width, and 1 mm in height. A 10 mm diameter superhard alloy ball indenter was pressed into the smooth surface of the test piece until the specified test force of 4.903 kN was reached, and the specified test force was maintained for 1 to 15 seconds. After the test force is released, the diameter of the depression remaining on the surface is measured, and the Brinell hardness calculation table of Annex B of JIS: Z2243 reads the A-Brinell hardness. [Evaluation Method of Performance of Roulette] Using a 16-inch metal mold for a car wheel, according to Jis: D4103, the rotational bending endurance test, radial load endurance test, and multiplication of the wheel made according to the conditions of each example were measured. Use the vehicle impact test. Example 1 A molten metal (730 ° C) of the component (alloy 1) shown in Table 1 was cast in a boat-shaped metal mold piece mold according to JIS: H5202, and casted by a metal mold tilting gravity-16 - 201139696, casting an aluminum alloy Casting. After the alloy castings taken out from the metal mold were held at 43 ° C for 6 hours, after quenching (water cooling) solution treatment, the age hardening treatment was performed at 16 (TC) for 8 hours. The heat-treated aluminum alloy was cut. For the casting, a test piece of 30 mm in length, 35 mm in width and 20 mm in height was prepared. The electrolytic honing treatment was performed by immersing the aluminum alloy casting in the sodium hydroxide degreasing solution for 10 minutes, and immersing it in 5 % of nitric acid was removed for 30 seconds to remove stains. Electrolytic honing was carried out in a mixed solution of phosphoric acid and sulfuric acid for anodic electrolysis of a pretreated aluminum alloy casting (water bath temperature at 65 ° C) for 1 minute. The gloss of the aluminum alloy casting is obtained. At this time, the measurement position in the aluminum alloy casting is a portion which is processed into a planar shape by the aforementioned cutting processing. The results are shown in Table 2. Further, in the cutting process, in addition to forming the basis 〖IS: The shape of the test piece No. 4 of Z220 1 was measured, respectively, and the tensile strength, endurance and elongation of the aluminum alloy casting produced by the gloss meterer were measured. The results are shown in Table 2. Cutting The hardness of the aluminum alloy casting produced by the gloss meterer was measured except that it was formed to have a length of 20 mm, a width of 20 mm, and a height of 10 mm. The results are shown in Table 2. Comparative Example 1 Except for electroless honing The aluminum alloy casting was produced as in Example 1. The results are shown in Table 2. If the honing was not performed, the gloss was remarkably lowered. Comparative Example 2 The molten metal used in addition to the prayer was composed of Table 1 (Alloy 3), the conditions of the solid solution treatment were 5 3 5 t, 3 hours, and the age hardening treatment strip -17 - 201139696 was 1 60 ° C, 4 hours, as in Example 1, the aluminum alloy was measured to determine the gloss. The results are shown in Table 2. Further, the shape of the test piece formed according to the No. 4 test piece according to 〗 〖IS: Z2201 is cut off like the casting degree, endurance and stretch of the aluminum alloy produced by the gloss measurer. The results are shown in Fig. 2. In addition, the result is shown in 2, which is formed into a longitudinal direction of 20 mm, a width of 20 mm, and a height of 10 as the aluminum alloy casting produced by the gloss meterer.硏 turbid, unable to obtain brilliance Example 2 An aluminum alloy cast gloss was produced as in Example 1 except that the electrolytic casting was used to cut the alloy cast by wet polishing. The results are shown in Table 2. Example 3 In addition to casting The molten metal used is shown in Table 1; 2), in place of the electrolytic honing, and the wet-polished honing and cutting of the gold-filled casting, as in Example 1, the casting alloy was cast. The results are shown in Table 2. Further, in the cutting process, the tensile strength of the aluminum alloy cast product produced by the measurer was measured in accordance with the shape of the test piece No. 4 of JIS: Z2201. The results are shown in Table 2. Further, in the cutting process, the length was 20 mm, the width was 20 mm, and the height was 1 mm. The gold casting was measured, and during the cutting, the tensile strength of each object was stronger than that of the cutting process, and the hardness was measured. After the surface, the surface of the aluminum after processing, the determination of the composition of the bismuth (the alloy after the aluminum alloy, the determination of light in addition to the shape of the root as the light, endurance and pull 'except for forming as the gloss for the -18-201139696 degree measured The hardness of the produced aluminum alloy castings is shown in Table 2. Comparative Example 3 The molten metal used in the casting was the composition shown in Table 1 (alloy 3), and the solid solution treatment condition was 5 3 5 °. C, 3 hours, the conditions of the age hardening treatment are 1 60 ° C, 4 hours, and instead of electrolytic honing, and the aluminum alloy casting after the honing of the wet polishing, as in the case of Example 1, the aluminum alloy is produced. Castings, the gloss was measured. The results are shown in Table 2. The gloss of the aluminum alloy casting was compared with the aluminum alloy casting of the present invention (Example 2) which was wet-polished under the same conditions. The degree is much worse. Example 4 In addition to the aluminum alloy casting which is degreased and removed by chemical honing, instead of electrolytic honing, an aluminum alloy casting was produced as in Example 1, and the gloss was measured. Linked to The chemical honing treatment liquid (Okuno Pharmaceutical Industry Co., Ltd.) at a temperature of 95 ° C was immersed for 1 minute. The results are shown in Table 2. Example 5 As in Example 1, the production of an aluminum alloy casting was carried out until the electrolytic honing procedure After the electrolytic honing, the aluminum alloy casting in the honing solution is transferred to the bath filled with the anodizing solution to perform anodizing treatment. The anodizing treatment uses a DC power source as a power source, and dissolves A15g / L as a solution. The aqueous solution of sulfuric acid (180 g/L) of the electrolyte was energized at 12.5 V for 1 minute. The thickness of the anodized film formed was 2/zm. The gloss of the aluminum alloy casting was determined as in Example -19-201139696. The results are shown in Table 2. Comparative Example 4 Except that the molten metal of the composition (alloy 3) shown in Table 1 was used, the conditions of the solid solution treatment were 5 3 5 ° C for 3 hours, and the conditions for the age hardening treatment were 160. At 4 ° C, 4 hours, as in Example 1, the aluminum alloy casting was produced until the end of the electrolytic honing process. After the electrolytic honing, the aluminum alloy casting in the honing solution was moved to the loading. Anodizing treatment is carried out in a bath of an anodizing solution, and anodizing is performed by using a DC power source as a power source, using an aqueous solution of sulfuric acid (1 80 g/liter) in which Al 5 g / L is dissolved as an electrolyte, and is energized at 1 2.5 V. 1 minute. The thickness of the anodized film formed was 2 μm. The gloss of the aluminum alloy casting was measured as in Example 1. The results are shown in Table 2. In this case, the gloss of the aluminum alloy casting was remarkably lowered. Examples 6 and 7 An aluminum alloy casting was produced as in Example 1 except that the aluminum alloy casting after the honing was wet-polished instead of electrolytic honing until the end of the wet honing procedure. The wet-polished aluminum alloy cast product is immersed in a sodium hydroxide-based degreased liquid, and is subjected to anodizing treatment after removing the honing agent or oil. The anodizing treatment was carried out using a DC power source as a power source, using an aqueous solution of sulfuric acid (180 g/liter) in which A15 g / L was dissolved as an electrolytic solution, and was energized at 12.5 V for 1 minute (Example 6) or 20 minutes (Example 7). The thickness of the anodized film formed was 2 μm (Example 6) or 10 μm (Example 7). As in Example 1, the gloss of the aluminum alloy casting was measured -20-201139696 degrees. The results are shown in Table 2. Example 8 An aluminum alloy cast was produced as in Example 1 except that heat treatment (solution treatment and age hardening treatment) was not carried out, and the gloss was measured. Further, in the cutting process, except for the shape of the test piece No. 4 according to the formula: IS: Z22 01, the tensile strength, the endurance and the stretching of the aluminum alloy cast produced by the gloss meterer were measured. The results are shown in Table 2. Further, in the cutting process, the hardness of the aluminum alloy casting produced by the gloss meterer was measured except that it was formed to have a length of 20 mm, a width of 20 mm, and a height of 1 mm. The results are shown in Table 2. Comparative Example 5 An aluminum alloy cast product was produced in the same manner as in Example 1 except that the heat treatment (solution treatment and age hardening treatment) was not carried out, and the gloss was measured. The results are shown in Table 2. The gloss is significantly reduced without honing. Example 9 Except that 7 was not subjected to heat treatment (solution treatment and age hardening treatment), aluminum alloy casting was performed as in Example 1, except that the aluminum alloy casting after the cutting process was wet-polished by wet etching. Matter, measure the gloss. The results are shown in Table 2. Comparative Example 6 # 7 The molten metal used in the casting was the composition shown in Table 1 (Alloy 4) 'T was subjected to heat treatment (solution treatment and age hardening treatment), instead of electrolytic 硏-21-201139696 grinding 'wet polishing cutting An aluminum alloy casting was produced as in Example 1 except for the processed aluminum alloy casting, and the gloss was measured. Further, in the cutting process, in addition to the shape of the test piece No. 4 according to JIS: Z2201, the tensile strength, the endurance and the stretching of the aluminum alloy casting produced by the gloss meterer were measured. The results are shown in Table 2. Further, in the cutting process, the hardness of the aluminum alloy casting produced by the gloss meterer was measured except that it was formed to have a length of 20 mm, a width of 20 mm, and a height of 1 mm. The results are shown in Table 2. Example 10 An aluminum alloy casting was produced as in Example 1, except that the heat treatment (solution treatment and age hardening) was not carried out, instead of electrolytic honing, and the aluminum alloy casting was degreased and stained by chemical honing. Gloss. Further, the chemical polishing system was immersed in a bath temperature of 9 5 ° C (Okuno Pharmaceutical Industry Co., Ltd.) for 1 minute. The results are shown in Table 2. Reference Example 1 The aluminum alloy casting of Comparative Example 3 was subjected to a Cr plating treatment to measure the gloss. The results are shown in Table 2. [Table 1] Alloy Mg Weight % 2 η Weight % Si Weight % F e Weight % C u Weight % T i Weight % B Weight % Be Weight % AI 1) 1 4.73 3.03 0.08 0.18 0. 06 0.10 0.05 0.002 Residue ' 2 5.10 2.40 0.10 0.16 0.09 0. 08 0.04 0.002 Residual 3 (AC4CH equivalent) 0.34 0.01 6. 94 0.14 0.00 0.12 0.06 0.000 Residual 4 (AC7A equivalent) 5.16 0.01 0.06 0.12 0.02 0.01 0.00 0.002 Residual niobium contains unavoidable impurities-22- 201139696 [<ν¥
機械的性質 硬度 ΗΒ10/500 85.3 1 81.3 1 64.6 1 1 1 1 1 1 63.3 1 1 l__ < i〇 1 1 拉伸 (%) 12.7 1 12.6 1 20.4 1 1 1 1 1 1 OO r·11 1 1 19.0 1 1 耐力 (N/mm2) 1 o s 1 CO CN 1 1 1 1 1 1 V〇 1 1 8 1 i 拉伸強度 (N/mm2) S CO 1 csi 1 m t 1 1 1 1 1 cn CN 1 1 1 1 光澤度 (%) m cn oo 白濁 ID OO v〇 cn o 寸 CO 2 cn s O) m I 1 异 CN cn s Ψ · * Γ—Η cn ON 陽極酸氧化膜 (^m) 1 1 1 1 1 1 1 CN CSJ <N o 1 1 1 1 1 1 硏磨方法 電解 1 電解 拋光 拋光 拋光 化學 電解 電解 拋光 拋光 電解 1 拋光 拋光 化學 拋光 ^ 1 11 μ 1 概、画 430°C，6h/160°C，8h 430°C，6h/160°C，8h 535°C，3h/160°C，4h 430°C，6h/16〇°C，8h 430°C，6h/160°C，8h 535〇C ' 3h/160〇C 4h 430°C，6h/l60°C，8h 430°C，6h/160°C，8h 535°C，3h/160°C，4h 430°C，6h/160°C，8h 430°C，6h/l60°C，8h t 1 1 1 r 535°C，3h/l60°C，4h 合金 r__蜱 cn CN 1 -4 cn < T—^ i'—H 1 H 寸 1 cn 實施例1 比較例1 比較例2 實施例2 實施例3 比較例3 實施例4 實施例5 比較例4 實施例6 實施例7 實施例8 比較例5 實施例9 比較例6 實施10 參考例P ββ^υ鹪(ζ — ίι- 201139696 實施例1 1 將表1所示成分（合金1)之熔融金屬（73 0°C)澆鑄於汽車 用輪盤之金屬模，藉由金屬模傾斜重力鑄造，鑄造1 6英寸 之輪盤。在43CTC下保持從金屬模取出之鋁合金鑄造物6 小時之後，淬火（水冷）固溶處理後，在1 60°C下進行時效硬 化處理8個小時。接著，切削加工該輪盤表面等之必要處 所’濕式拋光該輪盤表面及設計部全面，獲得光輝性之輪 盤。目視觀察該輪盤，除了金屬模不同外，具有與同樣製 作之實施例2之鋁合金鑄造物相等之光輝性。根據JIS : D4103’實施該輪盤之旋轉彎曲耐久試驗、徑向載荷耐久試 驗及乘用車用衝擊試驗。於表3中顯示其結果。又，鑄造 時，熔融金屬之金屬液流性良好。 實施例1 2 除了使用表1所示之組成（合金2)之熔融金屬外，如同實 施例11，製作輪盤，實施該輪盤之旋轉彎曲耐久試驗、徑 向載荷耐久試驗及乘用車用衝擊試驗。於表3中顯示其結 果。目視觀察該輪盤，除了金屬模不同外，具有與同樣製 作之實施例3之鋁合金鑄造物相等之光輝性。又，鑄造時.， 熔融金屬之金屬液流性良好。 比較例7 除了使用表1所示之組成（合金3)之熔融金屬，固熔處理 之條件爲535°C、3小時，時效硬化處理之條件爲160°C、4 小時外，如同實施例1 1，製作輪盤，實施該輪盤之旋轉彎 -24- 201139696 曲耐久試驗、徑向載荷耐久試驗及乘用車用衝擊試驗。於 表3中顯示其結果。目視觀察該輪盤，除了金屬模不同外， 具有與同樣製作之比較例3之鋁合金鑄造物相等之光輝 性。 實施例1 3 除了不進行熱處理（固溶處理和時效硬化處理）外，如同 實施例11’製作輪盤，實施該輪盤之旋轉彎曲耐久試驗、 徑向載荷耐久試驗及乘用車用衝擊試驗。於表3中顯示其 結果。目視觀察該輪盤，除了金屬模不同外，具有與同樣 製作之實施例9之鋁合金鑄造物相等之光輝性。 比較例 8 除了使用表1所示成分（合金4)之熔融.金屬，不進行熱處 理（固溶處理和時效硬化處理）外，如同實施例11，製作光 輝性之輪盤，實施該輪盤之旋轉彎曲耐久試驗、徑向載荷 耐久試驗及乘用車用衝擊試驗。於表3中顯示其結果。目 視觀察該輪盤，除了金屬模不同外，光輝性與同樣製作之 比較例6之鋁合金鑄造物相等。此時所用之熔融金屬之流 動性不充分，鑄造性不佳。 -25- 201139696 [表3] 合金 熱處理條件 . 輪盤性能 No. 固溶/時效硬化 硏磨方法 旋轉彎曲 載荷耐久 衝擊 實施例11 1 430〇C - 6h/160〇C - 8h 拋光 1 1 1 實施例12 2 430°C，6h/160°C，8h 拋光 2 1 1 比較例7 3 535°C，3h/160°C，4h 拋光 1 1 1 實施例13 1 拋光 2 1 2 比較例8 4 抛光 2 1 2 旋轉彎曲試驗 1 :未發生龜裂變形 2:發生龜裂或變形 載荷耐久試驗 1 :未發生龜裂變形 2:發生龜裂或變形 衝擊試驗 P無貫穿龜裂 2 :貫穿龜裂 【圖式簡單說明】 姐〇 y \\\ 【主要元件符號說明】 無。 26-Mechanical properties Hardness ΗΒ10/500 85.3 1 81.3 1 64.6 1 1 1 1 1 1 63.3 1 1 l__ < i〇1 1 Tension (%) 12.7 1 12.6 1 20.4 1 1 1 1 1 1 OO r·11 1 1 19.0 1 1 Endurance (N/mm2) 1 os 1 CO CN 1 1 1 1 1 1 V〇1 1 8 1 i Tensile strength (N/mm2) S CO 1 csi 1 mt 1 1 1 1 1 cn CN 1 1 1 1 Gloss (%) m cn oo White turbid ID OO v〇cn o Inch CO 2 cn s O) m I 1 Different CN cn s Ψ · * Γ—Η cn ON Anodic acid oxide film (^m) 1 1 1 1 1 1 1 CN CSJ <N o 1 1 1 1 1 1 Honing method Electrolysis 1 Electropolishing Polishing Polishing Chemical Electrolytic Electropolishing Polishing Electrolysis 1 Polishing Polishing Chemical Polishing ^ 1 11 μ 1 Overview, painting 430 ° C, 6 h / 160°C, 8h 430°C, 6h/160°C, 8h 535°C, 3h/160°C, 4h 430°C, 6h/16〇°C, 8h 430°C, 6h/160°C, 8h 535〇C ' 3h/160〇C 4h 430°C, 6h/l60°C, 8h 430°C, 6h/160°C, 8h 535°C, 3h/160°C, 4h 430°C, 6h/160 °C, 8h 430°C, 6h/l60°C, 8h t 1 1 1 r 535°C, 3h/l60°C, 4h alloy r__蜱cn CN 1 -4 cn < T—^ i'—H 1 H inch 1 cn Example 1 Comparative Example 1 Comparative Example 2 Example 2 Example 3 Comparative Example 3 Example 4 Example 5 Comparative Example 4 Example 6 Example 7 Example 8 Comparative Example 5 Example 9 Comparative Example 6 Example 10 Reference Example P ββ^υ鹪(ζ - ίι- 201139696 Example 1 1 The molten metal (73 0 ° C) of the component (alloy 1) shown in Table 1 was cast on a metal mold of an automobile wheel, and a 16-inch wheel was cast by oblique gravity casting of a metal mold. After the aluminum alloy casting taken out from the metal mold was held at 43 CTC for 6 hours, after quenching (water cooling) solution treatment, the age hardening treatment was performed at 1 60 ° C for 8 hours. Then, the surface of the wheel was machined and the like. The necessary space 'wetly polished the surface of the wheel and the design part to obtain a bright wheel. The disk was visually observed to have the same brightness as the aluminum alloy casting of Example 2 which was also prepared except that the metal mold was different. The rotary bending endurance test, the radial load endurance test, and the impact test for passenger cars of the wheel were carried out in accordance with JIS: D4103'. The results are shown in Table 3. Further, at the time of casting, the molten metal has good fluidity. Example 1 2 A disk was produced as in Example 11 except that the molten metal of the composition (alloy 2) shown in Table 1 was used, and the rotary bending endurance test, the radial load endurance test, and the passenger car for the wheel were carried out. Impact test. The results are shown in Table 3. The disk was visually observed to have the same brightness as the aluminum alloy casting of Example 3 which was also prepared except that the metal mold was different. Further, at the time of casting, the metal flow of the molten metal is good. Comparative Example 7 Except that the molten metal of the composition (alloy 3) shown in Table 1 was used, the conditions of the solid solution treatment were 535 ° C for 3 hours, and the conditions of the age hardening treatment were 160 ° C for 4 hours, as in Example 1. 1, the production of the wheel, the implementation of the rotation of the wheel -24-201139696 Qu endurance test, radial load endurance test and impact test for passenger cars. The results are shown in Table 3. The disk was visually observed to have the same brightness as the aluminum alloy casting of Comparative Example 3 produced in the same manner except that the metal mold was different. Example 1 3 Except that heat treatment (solution treatment and age hardening treatment) was not carried out, a rotating disk bending durability test, a radial load endurance test, and a passenger vehicle impact test were carried out as in Example 11'. . The results are shown in Table 3. The disk was visually observed to have the same brightness as the aluminum alloy casting of Example 9 which was also produced except that the metal mold was different. Comparative Example 8 A glittering disk was produced as in Example 11 except that the molten metal of the component (alloy 4) shown in Table 1 was used without heat treatment (solution treatment and age hardening treatment), and the disk was carried out. Rotating bending endurance test, radial load endurance test and impact test for passenger cars. The results are shown in Table 3. The disk was visually observed to have the same brightness as the aluminum alloy casting of Comparative Example 6 which was also produced except that the metal mold was different. The fluidity of the molten metal used at this time is insufficient, and the castability is not good. -25- 201139696 [Table 3] Alloy heat treatment conditions. Roulette performance No. Solid solution/age hardening honing method Rotating bending load Durable impact Example 11 1 430〇C - 6h/160〇C - 8h Polishing 1 1 1 Implementation Example 12 2 430 ° C, 6 h / 160 ° C, 8 h Polishing 2 1 1 Comparative Example 7 3 535 ° C, 3 h / 160 ° C, 4 h Polishing 1 1 1 Example 13 1 Polishing 2 1 2 Comparative Example 8 4 Polishing 2 1 2 Rotational bending test 1: No cracking occurred 2: Cracking or deformation load endurance test 1: No cracking occurred 2: Cracking or deformation shock test P No penetration crack 2: Through cracking [ Simple description of the schema] Sister y \\\ [Main component symbol description] None. 26-