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中文摘要：
研究固溶和时效热处理工艺对铸态 ZK60 镁合金显微组织与力学性能的影响。结果表明,当固溶处理条件为400 ℃下保温10h、时效处理温度为150 ℃时,ZK60合金中析出相随时效时间的延长而增加,直至30h。当时效温度升至 200 ℃时,析出相体积分数在时效时间为15～20h时达到最大值。室温拉伸实验表明,高密度第二相析出物有利于提高合金的强度和塑性。优化的热处理工艺条件为400 ℃固溶10h随后于 150 ℃时效 30h,得到的镁合金兼具有高的强度与塑性综合性能。
英文摘要：
The microstructure and mechanical properties of ZK60 Mg alloy were investigated under different solution treatments and artificial aging conditions. When as-cast ZK60 alloy was solution treated at 400 ℃for 10 h and artificially aged at 150 ℃, the volume fraction of precipitates increased with the aging time up to 30 h. When the as-cast ZK60 alloy was solution treated at 400 ℃ for 10 h and artificially aged at 200 ℃ for 15 20 h, the volume fraction of precipitates reached a peak value. Tensile test at room temperature showed that a high density of the second phase precipitates was beneficial to improving the strength and elongation. Solution treatment at 400 ℃ for 10 h and artificial aging at 150 ℃ for 30 h is considered the optimum heat treatment condition to obtain a good combination of strength and ductility.
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