光學系統(tǒng)用鋁合金材料的硬質氧化工藝

【簡介】

摘要：采用先硬質氧化再染黑色的方法對光學系統(tǒng)用鋁合金材料進行了處理。檢測了氧化膜層的厚度、顯微硬度和反射率，分析了溶液成分、電流密度、溫度和氧化時間對氧化膜反射率的影響。結果表明，采用含260～3009幾硫酸、l0～15 9／L草酸和l0～20 9／L多元醇的溶液在溫度5～7 ℃、電流密度2～3 A／dm2的條件下氧化50 min，可獲得厚度l5 um、顯微硬度450 HV、反射率低于8．4％的硬質氧化膜層，該氧化膜適用于高精度軍用光學變焦系統(tǒng)。

關鍵詞：光學變焦系統(tǒng)；鋁合金；硬質氧化；顯微硬度；反射率

中圖分類號；TGl74．41；TQl53．6    文獻標志碼：A

文章編號：1004—227X(2009)03—0024—03

Hard anodizing process on aluminum alloy materials for optical system／／JIANG Wei^*，SHEN De-xin，WANG Li-bo

Abstract：A method of hard anodizing followed by black dyeing was used to treat aluminum alloys for optical system． The thickness，microhardness and reflectance of oxide film were measured．and the effects of solution composition． current density，temperature  and  oxidation time  on reflectance of oxide film were analyzed．The results showed tllat a hard oxide film with thickness of l 5 μm．micro— hardness of 450 HV and reflectance below 8．4％can be obtained in a solution containing 260．300 g／L sulfuric acid．1 0-1 5∥L oxalic acid and l 0-20 g／L polyol at temperature5—7℃ and current density 2．3 A／dm²．The oxide film iS suitable for military optical zoom system with high precision．

Keywords：optical zoom system；aluminum alloy；hard anodizing；microhardness；reflectance

First-author’s address：Changchun UP Optotech C0．， Ltd．，Changchun l30031，China

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