高温预时效+低温再时效对Al-Mg-Si-Cu合金力学性能及晶间腐蚀敏感性的影响

李海, 毛庆忠, 王芝秀, 苗芬芬, 方必军, 宋仁国, 郑子樵

EFFECT OF HIGH TEMPERATURE PRE-AGEING AND LOW-TEMPERATURE RE-AGEING ON MECHANICAL PROPERTIES AND INTERGRANULAR CORROSION SUSCEPTIBILITY OF Al-Mg-Si-Cu ALLOYS

LI Hai, MAO Qingzhong, WANG Zhixiu, MIAO Fenfen, FANG Bijun, SONG Renguo, ZHENG Ziqiao

表1 不同时效状态6061铝合金的腐蚀行为及腐蚀深度

Table 1 Corrosion mode and corrosion depth of the 6061 alloy after different heat treatments

Ageing treatment Corrosion mode Corrosion depth / mm 180 ℃, 15 min IGC 180 180 ℃, 15 min+160 ℃, 24 h IGC 210 180 ℃, 15 min+160 ℃, 72 h IGC 220 180 ℃, 15 min+160 ℃, 120 h IGC 250 180 ℃, 15 min+160 ℃, 240 h IGC 210 180 ℃, 15 min+160 ℃, 360 h IGC 190 180 ℃, 2 h IGC 230 180 ℃, 2 h+160 ℃, 24 h IGC 150 180 ℃, 2 h+160 ℃, 72 h IGC 120 180 ℃, 2 h+160 ℃, 120 h UC - 180 ℃, 2 h+160 ℃, 240 h UC - 180 ℃, 2 h+160 ℃, 360 h UC - 180 ℃, 8 h IGC 360 180 ℃, 8 h+160 ℃, 24 h IGC 310 180 ℃, 8 h+160 ℃, 72 h IGC 240 180 ℃, 8 h+160 ℃, 120 h IGC 190 180 ℃, 8 h+160 ℃, 240 h IGC 120 180 ℃, 8 h+160 ℃, 360 h UC -