摘要
首先对Mg-2.0Zn-1.0Y-0.5Zr合金进行490℃固溶处理8 h,随后对其进行200℃时效2~12 h的处理,采用X射线衍射仪(XRD)、扫描电镜(SEM)、拉伸实验、浸泡测试和电化学测试等研究了合金经不同热处理后的组织和性能。结果表明:与固溶态合金相比,时效处理后,合金中的析出相呈细小颗粒状在基体上均匀分布,随时效时间的延长第二相数量逐渐增多;时效后的合金强度均高于固溶态合金,但耐蚀性有所下降。经综合考虑,200℃时效4 h后合金的性能最佳,其极限抗拉强度、屈服强度、伸长率和腐蚀速率分别为(224.6±7.3)MPa、(135.2±4.3)MPa、(19.1±1.2)%和(0.463±0.015)mm/y。
Mg-2.0Zn-1.0Y-0.5Zr alloy was first solution treated at 490℃for 8 h,and then aged at 200℃for 2-12 h.Microstructure and properties of the alloy after different heat treatments were studied by means of X-ray diffractometer(XRD),scanning electron microscopy(SEM),tensile test,immersion test and electrochemical test.The results show that,compared with the alloy after solution treatment,the precipitated phase in the alloy is uniformly distributed in the matrix as fine particles after aging treatment,and the number of the second phase gradually increases with the increase of aging time.The strength of the aged alloy is higher than that of the solution treated alloy,but the corrosion resistance decreases.After comprehensive consideration,the alloy has the best properties after aging at 200℃for 4 h,and its ultimate tensile strength,yield strength,elongation and corrosion rate are(224.6±7.3)MPa,(135.2±4.3)MPa,(19.1±1.2)%and(0.463±0.015)mm/y,respectively.
作者
冯武云
贺俊光
田培梧
文九巴
龚圆
郑向阳
FENG Wu-yun;HE Jun-guang;TIAN Pei-wu;WEN Jiu-ba;GONG Yuan;ZHENG Xiang-yang(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Luoyang 471023,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第4期69-77,共9页
Transactions of Materials and Heat Treatment
基金
河南省高等学校重点科研项目(20A430010)。
关键词
生物镁合金
时效时间
第二相
性能
biological magnesium alloy
aging time
second phase
property
