2060铝锂合金化学铣切工艺优化及表面质量改善
Optimization of chemical milling process and improvement of surface quality for 2060 aluminum-lithium alloy
赵超 1王帅星 1王辉庭 1黄勇 2吴宁 2杜楠1
作者信息
- 1. 南昌航空大学 材料科学与工程学院,江西 南昌 330063
- 2. 航空工业洪都航空工业集团有限责任公司,江西 南昌 330096
- 折叠
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Na2CO3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Na2CO3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,Na2S 30 g/L,三乙醇胺(TEA)50 g/L,Na2CO30.5 mol/L,RA-8 0.4 g/L,Al3+0～70 g/L,温度为90℃.在此条件下化铣试样表面粗糙度(Ra)为0.95～1.21 μm,腐蚀速度为20～50 μm/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 Na2CO3 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 Na2CO3 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,Na2S 30g/L,triethanolamine(TEA)50 g/L,Na2CO3 0.5 mol/L,RA-8 0.4 g/L,Al3+0‒70 g/L,and 90℃.Under this condition,the surface roughness(Ra)of 2060 aluminum-lithium alloy treated by chemical milling is 0.95 μm‒1.21 μm,and the corrosion rate is 20 μm‒50 μm/min.
关键词
2060铝锂合金/添加剂/化铣加工/表面粗糙度Key words
2060 aluminum-lithium alloy/additive/chemical milling/surface roughness引用本文复制引用
出版年
2024
NETL
NSTL
万方数据