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5083铝镁合金冷作硬化较明显,经22％的冷变形后,它的强度b=39公斤/毫米~2,60.2=29.25公斤/毫米~2,而δ_(10)只有3～4％。这样的延伸率远远不能满足构件的需要。为了得到良好的综合性能,我们做了挤压后不退火冷拔,变形形量ε=22％,挤压后退火冷拔,变形量ε=22％,挤压后不退火冷拔再回复处理(回复是指变形金属在加热期内某些力学性能和晶内亚结构发生了变化,但新的再结晶晶粒尚未出现的退火过程),以及冷变形量ε=15％拉拔后不退火的拉力实验。结果见表1。
The cold-hardening of 5083 aluminum-magnesium alloy is more obvious. After 22% cold deformation, its strength b = 39kg / mm ~ 2,60.2 = 29.25kg / mm ~ 2, while δ_ (10) is only 3 ~ 4%. Such elongation can not meet the needs of components. In order to get a good overall performance, we do not anneal after extrusion extrusion, the deformation of the amount of ε = 22%, after annealing annealing drawing, the deformation of ε = 22%, after the extrusion is not annealed cold drawing back (Refers to some mechanical properties and intragranular substructures of the deformed metal during heating but the annealing process for the new recrystallized grains that has not yet occurred), and cold deformation ε = 15% No annealing after drawing Rally test. The results are shown in Table 1.