模拟海洋环境下航空铝合金铣削表面的耐腐蚀性研究  

Surface Corrosion Resistance of Milling Aeronautic Aluminum Alloy in Simulated Marine Environment

作　　者：张入仁[1] 万熠[1] 李晨[1] 刘战强[1] 

机构地区：[1]山东大学,济南市250061

出　　处：《工具技术》2011年第12期12-15,共4页Tool Engineering

基　　金：山东省自然科学基金资助项目(ZR2010EQ041);山东大学自主创新基金资助项目(2009TS026)

摘　　要：通过铣削实验,研究航空铝合金7050-T7451铣削加工切削速度和每齿进给量等参数对表面粗糙度的影响规律,优化切削加工参数以获得较低的粗糙度。模拟海洋环境对铣削加工后工件进行耐腐蚀实验,用腐蚀损伤的平均深度和腐蚀损伤度两个参数表征腐蚀损伤程度。初步研究结果发现,在残余应力相差不大的情况下,表面越粗糙工件的耐腐蚀性越差,通过优化切削加工参数,可提高零件耐腐蚀性。The effects of cutting speed and feed rate on surface roughness have been studied through milling aeronautic aluminum alloy 7050- T7451. Therefore, the optimized milling parameters were obtained to get lower surface roughness. Then, machined workpiece have been put into simulated marine environment to investigate their corrosion resistance performance. Two paranaeters---average depth and corrosion damage degree, are employed to characterize the degree of corrosion damage. The results show that if there is little variation of residual stresses, the worse the surface roughness is, more serious the corrosion is. In conclusion, the corrosion resistance performance of parts can be improved by reducing surface roughness.

关 键 词：铣削 航空铝合金 表面粗糙度 腐蚀损伤 

分 类 号：TG506.7[金属学及工艺—金属切削加工及机床]