摘要
采用超声波辅助半连续铸造工艺制备准φ310 mm的Al-6Zn-0.9Mg-0.2Cu合金铸锭,研究了超声波功率对半连续铸造Al-6Zn-0.9Mg-0.2Cu合金铸锭显微组织与力学性能的影响。结果表明,超声波辅助半连续铸造工艺可以细化铸锭的晶粒和第二相,提高固溶度。超声波功率越大,铸锭的晶粒和第二相越细小,第二相分布更均匀,固溶度越高,拉伸力学性能越高。当超声波功率增大至210 W时,抗拉强度为329.44 MPa,屈服强度为242.34 MPa,伸长率为11.97%。与未施加超声波的铸锭相比,抗拉强度、屈服强度和伸长率分别提高5.95%、11.53%和31.25%。
The as-cast Al-6 Zn-0.9 Mg-0.2 Cu alloy ingots with a diameter of 310 mm were prepared by semi-continuous casting process with ultrasonic.The effects of ultrasonic power on microstructure and mechanical properties of as-cast Al-6 Zn-0.9 Mg-0.2 Cu alloy ingots were investigated.The results show that the grains and second phases of ingot can be refined by the ultrasonic and the solid solubility of elements in aluminum matrix can be improved.The ultrasonic power is higher,the grain and the second phase are smaller,the second phase distribution is more uniform,the solid solubility is higher,the tensile mechanical properties are higher.When the ultrasonic power increases to 210 W,the tensile strength,yield strength and elongation are 329.44 MPa,242.34 MPa and 11.97%,respectively.Compared with the ingot without ultrasonic,the tensile strength,yield strength and elongation were improved by 5.95%,11.53%and 31.25%,respectively.
作者
王睿
张浩宇
陈立佳
甘春雷
周楠
王顺成
WANG Rui;ZHANG Haoyu;CHEN Lijia;GAN Chunlei;ZHOU Nan;WANG Shuncheng(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 410083,China;Guangdong Institute of Materials and Processing,Guangzhou 510650,China)
出处
《铸造技术》
CAS
2019年第4期336-340,共5页
Foundry Technology
基金
广东省科学院院属骨干科研机构创新能力建设项目资助(2018GDASCX-0117)
广东省科技厅公益研究与能力建设项目资助(2017A070701029)
中山市重大科技计划项目资助(2016A1001)
