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处于两相状态的挤压温度下生产的铝合金挤压制品工艺的缺点是在淬火前加热时形成不均匀组织:出现接近表面的粗晶环和在部件中部的粗晶层[1]。不同晶粒度是由于挤压过程中形成的弥散粒子在淬火前加热时不均匀分布和相应地不均匀溶解造成的。挤压部件在组织方面和第二相在体积方面分布的不均匀性会降低其抗蚀性能[2,3]。有意义地确定了热处理制度对Al-Mg
The disadvantage of the aluminum alloy extrusion products produced at the extrusion temperature in the two-phase state is the formation of an inhomogeneous structure when heated before quenching: a coarse-grained ring near the surface and a coarse-grained layer in the middle of the part [1]. The different grain sizes are due to the inhomogeneous distribution of the diffusing particles formed during the extrusion process when heated before quenching and correspondingly non-uniform dissolution. Inhomogeneities in the microstructure and second phase distribution in volume of the extruded parts reduce their corrosion resistance [2,3]. It is meaningful to determine the heat treatment regime for Al-Mg