定向凝固速率对ZChSnSb8-4合金组织及力学性能的影响  

Effects of Solidification Rate on Microstructure and Mechanical Properties of ZChSnSb8-4 Alloy

作　　者：刘建秀 刘子豪 樊江磊 吴深 李莹 史朝侠 Liu Jianxiu;Liu Zihao;Fan Jianglei;Wu Shen;Li Ying;Shi Zhaoxia(School of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry)

机构地区：[1]郑州轻工业大学机电工程学院

出　　处：《特种铸造及有色合金》2022年第8期936-939,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(U190410595)。

摘　　要：采用定向凝固工艺制备不同定向凝固速率下ZChSnSb8-4合金试样,对ZChSnSb8-4合金中的Cu_(6)Sn_(5)相的枝晶间距、SnSb相的晶粒半径、SnSb相的硬度与定向凝固速率进行对比。结果表明,随着生长速度的增大,Cu_(6)Sn_(5)相的枝晶间距随着生长速度的增加呈先增加后逐渐稳定的趋势;随着生长速率增大,定向凝固区中SnSb相的晶粒半径逐渐减小,而SnSb相硬度呈增大趋势,当定向凝固速率为100μm/s,SnSb相硬度(HV)最高,为104.8。The specimens of ZChSnSb8-4 alloy at different directional solidification rates were prepared by directional solidification.The dendrite spacing of Cu_(6)Sn_(5)phase,grain radius of SnSb phase,hardness of SnSb phase and directional solidification rate in ZChSnSb8-4 alloy were compared.The results indicate that with the increase of growth rate,the dendrite spacing of Cu_(6)Sn_(5)phase is increased firstly and then gradually to be stabilized.The grain radius of SnSb phase in directional solidification zone is gradually decreased,while the hardness presents an increasing trend.When the directional solidification rate is 100 μm/s,the hardness of SnSb phase reaches the maximum,which is 104.8 HV.

关 键 词：定向凝固 锡基巴氏合金 Cu6Sn5相 SnSb相 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]