摘要
通过改变热处理工艺中的时效温度和时间,研究时效工艺对Al-Si-Cu-Mg系合金力学性能和微观组织的影响。发现单级时效的合金随着时效时间的增加,其力学性能先上升后下降,在9 h时达到峰值。与单级时效G.P区不连续析出相比,双级时效G.P区连续析出可以明显缩短时效峰值时间。随着时效时间的增加,Al-Si-CuMg系合金中的强化相θ-相和Q-相发生转变,同时伴随形貌改变,导致其对合金的强化作用逐渐降低。时效效果最理想的时效工艺是第一级低温时效80℃×3 h,此时合金的各项力学性能较为均衡,强度和韧性匹配较好。
In this paper,the effects of aging on the mechanical properties and microstructure of Al-SiCu-Mg alloys were studied by changing the aging temperature and time.It is revealed that,the mechanical properties of single-stage aging alloys first increase and then decrease with the increase of aging time,and reach peak values at 9 hours.Compared with the discontinuous precipitation of the single-stage aging G.P zone,the continuous precipitation of the two-stage aging G.P zone can significantly shorten the aging peak time. With the increase of aging time,the strengthening phase θ-and Q-of the Al-Si-Cu-Mg alloy transform with morphological change,resulting in gradual decrease of their strengthening effect on the alloy. The best aging process is the first-stage low temperature aging 80℃ × 3 h while the alloy ＇s mechanical properties are more balanced with good toughness and better coordination.
作者
张万坤
张令坤
王通
张炳荣
ZHANG Wan-kun;ZHANG Ling-kun;WANG Tong;ZHANG Bing-rong(School of Mechanical ＆ Automotive Engineering,QiL u University of Technology（Shandong Academy of Sciences）,Jinan 250353,Chin)
出处
《齐鲁工业大学学报》
2018年第4期33-38,共6页
Journal of Qilu University of Technology
基金
山东省科技重大专项(2015ZDZX03004)
山东省自然科学基金(ZR2016EEM48)
