Zhao Chao,Wang Shuaixing*,Wang Huiting,et al.Optimization of chemical milling process and improvement of surface quality for 2060 aluminum-lithium alloy[J].Plating & Finishing,2024,(7):38-43.[doi:10.3969/j.issn.1001-3849.2024.07.006]
2060铝锂合金化学铣切工艺优化及表面质量改善
- Title:
- Optimization of chemical milling process and improvement of surface quality for 2060 aluminum-lithium alloy
- Keywords:
- 2060 aluminum-lithium alloy ; additive ; chemical milling ; surface roughness
- 分类号:
- TG146
- 文献标志码:
- A
- 摘要:
- 针对铝锂合金化铣过程中含锂相的溶解过快导致表面粗糙度高的问题，借助三维显微镜、动电位极化测试等手段研究了 Na 2 CO 3 及苯环类添加剂 RA-8 对 2060 铝锂合金化铣速度、表面粗糙度及溶解行为的影响，优化了化铣配方。结果表明：单一 Na 2 CO 3 即可抑制含锂相的溶解，其与 RA-8 的协同作用可进一步改善表面质量，且对化铣速度的影响较小；针对 2060 铝锂合金，较优的化铣参数为： NaOH 160 g/L ， Na 2 S 30 g/L ，三乙醇胺（ TEA ） 50 g/L ， Na 2 CO 3 0.5 mol/L ， RA-8 0.4 g/L ， Al 3+ 0~70 g/L ，温度为 90 ℃ 。在此条件下化铣试样表面粗糙度（ R a ）为 0.95~1.21 μ m ，腐蚀速度为 20~50 μ m/min 。
- Abstract:
- ： In order to solve the problem of high surface roughness caused by the rapid dissolution of lithium-containing phase in the process of chemical milling for aluminum-lithium alloy ， the effects of Na 2 CO 3 and benzene ring additive RA-8 on the milling speed ， surface roughness and dissolution behavior of 2060 aluminum-lithium alloy are studied by means of three-dimensional microscopy and potentiodynamic polarization test ， and the chemical milling formula is optimized.The results show that Na 2 CO 3 alone can already inhibit the dissolution of lithium-containing phases ， and its synergistic effect with RA-8 can further improve the surface quality ， meanwhile their effect on the milling speed is small. For 2060 aluminum-lithium alloy ， the optimal milling parameters are ： NaOH 160 g/L ， Na 2 S 30 g/L ， triethanolamine （ TEA ） 50 g/L ， Na 2 CO 3 0.5 mol/L ， RA-8 0.4 g/L ， Al 3+ 0-70 g/L ， and 90 °C. Under this condition ， the surface roughness （ R a ） of 2060 aluminum-lithium alloy treated by chemical milling is 0.95 μ m-1.21 μ m ， and the corrosion rate is 20 μ m-50 μ m/min.
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备注/Memo
收稿日期： 2023-11-07 修回日期： 2023-11-19 作者简介： 赵超（ 1996 —），男，硕士研究生， email ： 623254570@qq.com * 通信作者： 王帅星，研究方向为航空材料表面处理及电化学加工， email ： wsxxpg@126.com 2060