热处理状态对LD10 铝合金化铣表面质量的影响

为了解决运载火箭结构中口盖零件化铣后表面质量较差的问题,对LD10 铝合金板材的化铣加

工进行了试验研究。采取同批次、相同变形量、不同热处理状态(淬火+人工时效、淬火+过时效)的零件在相同

的化铣工艺参数下进行试验,并对零件的化学成分、金相组织进行了分析。理论研究及试验结果表明:LD10 铝

合金的化铣表面质量与加工前热处理状态有关,退火状态及淬火+人工时效状态的零件化铣后表面质量较好,

在不影响力学性能的前提下,可采用过时效处理提高化铣表面质量。

Influence of Heat Treatment State on Chemical MillingSurface Quality for LD10 Aluminum Alloy

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.