【摘要】：通過正交試驗篩選了適合2197鋁鋰合金化學銑切加工拋光工藝的槽液配方,探討了材料狀態(tài)、拋光溫度和拋光時間對2197鋁鋰合金堿腐蝕及化學銑切后表面拋光性能的影響。結(jié)果表明,HNO_3含量和溫度是影響拋光效果的主要因素,CrO_3的影響次之,HF最小。材料的不同狀態(tài)對拋光有較大影響,T8態(tài)過時效的鋁鋰合金拋光后粗糙度最小,T6態(tài)欠時效的鋁鋰合金拋光后粗糙度最大。當拋光的配方和工藝條件為硝酸250g/L、鉻酐10g/L、氫氟酸2g/L、拋光時間2~3min、拋光溫度25℃時,2197鋁鋰合金化銑表面能獲得良好的拋光效果。
[Abstract]:The formula of slot solution suitable for chemical milling and polishing process of 2197 Al-Li alloy was selected by orthogonal test. The effects of material state, polishing temperature and polishing time on alkali corrosion of 2197 Al-Li alloy and surface polishing properties after chemical milling were discussed. The results show that the content of HNO3 and temperature are the main factors affecting the polishing effect. Different states of materials have great influence on the polishing process of Al-Li alloy with overaging in T8 state. The roughness of Al-Li alloy after polishing is the minimum and the roughness of Al-Li alloy with underaging in T6 state is the biggest after polishing. When the formula and process conditions are as follows: nitric acid 250 g / L, chromic anhydride 10 g / L, hydrofluoric acid 2 g / L, polishing time 2 min, polishing temperature 25 鈩，

本文編號：2195556