粉末冶金技术2026，Vol.44Issue(2)：202-209,8.DOI:10.19591/j.cnki.cn11-1974/tf.2025040006
超声热压烧结7075铝合金微观组织及力学性能的研究
Study on microstructure and mechanical properties of 7075 aluminum alloys by ultrasonic hot-pressing sintering
摘要
Abstract
To solve the problems of coarse grains,pores,low relative density,and poor mechanical properties of traditional hot-pressed sintered 7075 aluminum alloys,the 7075 aluminum alloys were prepared by ultrasonic hot-pressing sintering technology,and the influence of sintering temperature(450,475,500,525 ℃)on the microstructure and mechanical properties of aluminum alloys was studied.The results show that with the increase of sintering temperature,the relative density,yield strength,tensile strength,and elongation of the aluminum alloys all increase first and then decrease.When the sintering temperature is 500 ℃,the aluminum alloys have the large and deep dimples,small grain size,and the best mechanical properties,the relative density is(99.99±0.01)％,the yield strength is(153±5)MPa,the tensile strength is(245±10)MPa,and the elongation is(6.78±0.29)％,which is increased by 1.09％,15.90％,10.86％,and 60.28％,respectively,compared with the non-ultrasonic hot-pressing sintering.关键词
超声热压烧结/7075铝合金/烧结温度/微观组织/力学性能Key words
ultrasonic hot-pressing sintering/7075 aluminum alloys/sintering temperature/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
宁梦莎,高姣姣,王卓,宋金鹏..超声热压烧结7075铝合金微观组织及力学性能的研究[J].粉末冶金技术,2026,44(2):202-209,8.基金项目
国家自然科学基金资助项目(52205492) （52205492）
山西省基础研究计划资助项目(202303021221037) （202303021221037）
山西省科技成果转化引导专项(202204021301039) （202204021301039）
