化学铣切对6A02薄铝板性能的影响

Effect of Chemical Milling on the Properties of 6A02 Thin Aluminum Sheet

6A02铝合金薄板在直升机上应用较广泛,有时需进行化铣。通过采用尺寸测量、拉伸性能检测、金相分析等手段,研究了化铣对6A02铝合金薄板厚度、表面质量、力学性能和显微组织影响。结果表明,化铣可将薄板厚度铣削变薄;溶液中的Na_(2)S与三乙醇胺共同作用,可降低合金元素与Al形成的电偶腐蚀作用,使薄板表面质量改善;合金析出相的电化学性质与基体无明显差异,不会引起合金晶间腐蚀缺陷,对薄板的力学性能和显微组织无明显影响。可采用化铣对6A02薄铝板进行加工。

6A02 aluminum alloy sheet was widely used in helicopter,sometimes milling need to be carried out.By means of dimension measurement,tensile property detection and metallographic analysis,the influence of chemical milling on the thickness,surface quality,mechanical properties and microstructure of 6A02 aluminum alloy sheet was studied.The results show that chemical milling can thin the thickness of aluminum sheet.The combined effect of Na_(2)S and triethanolamine in the solution can reduce the galvanic corrosion effect of alloy elements and Al,and the surface quality of the thin plate is improved.The electrochemical properties of the precipitated phase of the alloy are not significantly different from the matrix,and will not cause intergranular corrosion defects of the alloy,and have no obvious effect on the mechanical properties and microstructure of the sheet.6A02 thin aluminum sheet can be processed by chemical milling.