模拟海洋环境下航空铝合金铣削表面的耐腐蚀性研究_张入仁.pdf

12 张入仁,万熠,李晨,刘战强 :, 7050- T7451 , , , , ,, :; ;; :TG506.7 :A Surface Corrosion Resistance of Milling Aeronautic Aluminum Alloy in Simulated Marine Environment Zhang Ruren, anYi, Li Chen, Liu Zhanqiang Abstract: The effectsof cutting speed andfeedrate on surface roughness have been studiedthrough milling aeronautic alu- minum alloy 7050- T7451. Therefore, theoptimizedmilling parameterswere obtainedto get lower surfaceroughness. Then, ma- chinedworkpiece havebeenput into simulated marine environment to investigatetheir corrosion resistance performance. Two pa- rameters) average depth and corrosion damage degree, are employedto characterizethe degree of corrosion damage. The results show that if there is littlevariation of residual stresses, theworsethesurface roughnessis, more seriousthe corrosion is. In con- clusion, the corrosion resistance performance of parts can be improved by reducing surfaceroughness. Keywords:milling; aeronautic aluminum alloy;surface roughness; corrosionresistance [4] 1 , , [1, 2] , 7050- , , T7451 , , , , 2 ,, 2. 1 , ALCOA [3] 7050-T7451, ,Simpson Brooks ,449 , 13%; 12 125 ,13% 60mm@ 110mm@ 25mm , 1 7 5 - T7451 (wt%) Zn Cu Mg Zr