ZL205A合金元素偏析对液相密度的影响  

Study on ZL205A Alloy Elements Segregation in Solidification Process of Liquid Density

作　　者：郭凡 崔保伟 胡婉婷 杨堃 王明杰 商立瞳 王萍 刘健 黄艳军 GUO Fan;CUI Baowei;HU Wanting;YANG kun;WANG Mingjie;SHANG Litong;WANG Ping;LIU Jian;HUANG Yanjun(Capital Aerospace Machinery Company,Beijing 100076,China)

机构地区：[1]首都航天机械有限公司,北京100076

出　　处：《铸造技术》2022年第3期191-196,共6页Foundry Technology

基　　金：国家自然科学基金-航天先进制造技术研究联合基金项目(U153720061)。

摘　　要：通过液淬方法研究ZL205A合金元素偏析及其对液相密度的影响,研究结果表明,合金在630~620℃时合金凝固速度最快,在620℃以下合金凝固速度变得缓慢,Cu元素的偏析程度最大,其次是Mn、V、Ti、Zr,元素偏析程度大致与元素原子半径大小相对应。ZL205A合金凝固过程中随着温度的降低,液相密度逐渐上升,液相密度在不同的温度区间上升速度不一样,Cu元素的偏析对剩余液相密度的影响最大,其中Mn、Ti、V和Zr元素对剩余液相密度影响程度较小。Element segregation of ZL205A alloy and its effect on liquid density were studied by quenching at different temperature.The results show that the solidification rate of the alloy is the fastest between 630℃and 620℃,and the solidification rate becomes slow after 620℃.The segregation degree of Cu element is the largest,followed by the segregation degree of Mn,V,Ti and Zr elements,which is roughly corresponding to the atomic radius of the element.During the solidification process of ZL205A,the liquid density increases gradually with the decrease of temperature,and the liquid density increases at different temperature intervals at different rates.The segregation of Cu element has the greatest influence on the residual liquid density,among which Mn,Ti,V and Zr elements have little influence on the residual liquid density.

关 键 词：ZL205A 液相密度 偏析 溶质分布 凝固过程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]