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通过正交试验以及多指标分析法对2219铝合金的NaOH+Na2S+TEA+Al3+化学铣切溶液配方进行了最优化研究。实验结果表明,当将化铣后试样表面粗糙度作为分析时着重考虑的指标时,化铣溶液的最优配比为160~180g·L-1NaOH,5g·L-1Na2S,60g·L-1TEA,25g·L-1Al3+。当优先考虑化铣速率的影响时,溶液的最有配比为200g·L-1NaOH,14g·L-1Na2S,10~60g·L-1TEA,5g·L-1Al3+。而若同时考虑表面粗糙度和化铣速率两个指标,适用于2219铝合金化学铣切的最优溶液配方则应为200g·L-1NaOH,5g·L-1Na2S,60g·L-1TEA,5g·L-1Al3+,当使用此配比溶液对2219铝合金进行化铣后得到的试样表面粗糙度与化铣速率分别为0.6055μm以及0.1638mm·min-1。
Orthogonal test and multi-index analysis of 2219 aluminum alloy NaOH + Na2S + TEA + Al3 + chemical milling solution was optimized. The experimental results show that when the surface roughness of the sample after milling is taken as an important consideration in the analysis, the optimum proportion of milling solution is 160-180g · L-1NaOH, 5g · L-1Na2S, 60g · L- 1 TEA, 25 g · L-1Al3 +. When the effect of milling speed was prioritized, the best proportion of solution was 200g · L-1NaOH, 14g · L-1Na2S, 10-60g · L-1TEA and 5g · L-1Al3 +. If we consider both the surface roughness and the milling rate, the optimal formula for chemical milling of 2219 aluminum alloy should be 200g · L-1NaOH, 5g · L-1Na2S, 60g · L-1TEA, 5g · L-1Al3 +. The surface roughness and milling speed of 2219 aluminum alloy were 0.6055μm and 0.1638mm · min-1, respectively.