Optical microscope(OM),scanning electron microscope(SEM),energy dispersive analysis(EDS)and universal tensile test-ing machine at room temperature were used to observe and analyze the microstructure,mechanical properties and intergranular corro-sion propert of 6061 forged aluminium alloy after different solution heat treatment and ageing treatment(T6).The results show that at different solution heat treatment systems,the mechanical properties at 500℃×2 h are the best,the solute elements are dissolved com-pletely and the grains are fine without recrystallization.Then the effects of different ageing processes on mechanical properties and in-tergranular corrosion property of the alloy were studied.It is found that the tensile strength of the alloy reaches 364 MPa and the elon-gation is 15.1%at 500℃×2 h+210℃×4 h,and the intergranular corrosion property is good.
关键词
6061铝合金/显微组织/固溶和时效/力学性能/晶间腐蚀性能
Key words
6061 aluminium alloy/microstructure/solution and ageing/mechanical properties/intergranular corrosion property
维普
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