Abstract:The research of chemical milling for LD10 aluminum alloy plate have been studied in order to solve
the problem of poor surface quality of cover which is processed by chemical milling used in the launch vehicle structure
system. Experiment was conducted following same chemical milling process parameters for parts with same batch,
same deformation and different heat treatment state (quenching and artificial aging, quenching and over aging). And
the chemical composition and microstructure of the parts were analyzed. The results of theoretical study and experiment
show that: surface quality of LD10 aluminum alloy parts processed by chemical milling is related with the heat
treatment, moreover, the better surface quality belong to the part with annealing and quenching and artificial aging
state. The surface quality of chemical milling part is improved by over aging without affecting mechanical properties.
