摘要
研究了超声处理对Mg-3.03Ca、Mg-6.04Zn-1.17Ca和AZ91镁合金3种不同熔体除氢的影响,分别采用密度法和固态测氢法表征除氢效果。结果表明,应用超声处理可显著地去除熔体中的氢,并细化显微组织。对于Mg-3.03Ca、Mg-6.04Zn-1.17Ca和AZ91镁合金,除氢率分别可达53.8%、67.5%和50.5%。AZ91镁合金除氢后,最低氢含量可达9.6 cm3/100 g,室温抗拉强度、屈服强度和伸长率可分别达Rm=194 MPa、R0.2=133 MPa和A=4.8%,抗拉强度和伸长率比未处理时分别提高了27.6和4.4%,而屈服强度变化不显著。
The effects of ultrasonic on removing hydrogen in three kinds of magnesium alloys including Mg-3.03Ca,Mg-6.04Zn-1.17Ca and AZ91 were investigated.The results show that the hydrogen in the melt can be removed and the microstructure can be refined by ultrasonic treatment.For Mg-3.03Ca,Mg-6.04Zn-1.17Ca and AZ91 magnesium alloys,the hydrogen removal rates are 53.8%,67.5%and 50.5%,respectively.After hydrogen removal,the minimum hydrogen content of AZ91 magnesium alloy can reach 9.6 cm3/100 g.At room temperature,the tensile strength,yield strength and elongation can reach Rm=194 MPa,R0.2=133 MPa and A=4.8%,respectively.The tensile strength and elongation increase by 27.6 and 4.4%,respectively,while the yield strength does not change significantly.
作者
李展志
贾征
涂季冰
乐启炽
俞玉祥
汪威
高爱林
崔建忠
LI Zhanzhi;JIA Zheng;TU Jibing;LE Qichi;YU Yuxiang;WANG Wei;GAO Ailin;CUI Jianzhong(Giant Light Metal Technology (Kunshan) Co., Ltd., Kunshan 215300,China;Department of Welding Engineering of School of Mechanical Engineering, Shenyang University, Shenyang 110044,China;Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University, Shenyang 110819,China)
出处
《铸造技术》
CAS
2019年第6期563-568,共6页
Foundry Technology
基金
辽宁省博士启动基金资助(201601219)
关键词
超声场
镁合金
铸锭密度
氢含量
ultrasonic field
magnesium alloys
density of ingot
hydrogen content
