熔融浇注法制备可溶性盐芯的组织与性能  

Microstructure and Properties of Soluble Salt Core Prepared by Molten Casting

作　　者：于杰 游志勇[1] 蒋傲雪 马振星 王彬 赵薛生 刘涛 Yu Jie;You Zhiyong;Jiang Aoxue;Ma Zhenxing;Wang Bin;Zhao Xuesheng;Liu Tao(School of Materials Science and Engineering,Taiyuan University of Technology)

机构地区：[1]太原理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2023年第7期898-902,共5页Special Casting & Nonferrous Alloys

摘　　要：研究了可溶性盐芯的分配比及其制造工艺。采用熔融浇注法制备盐芯,并对制备后的盐芯进行了抗弯强度测试,其抗弯强度最高可达到52.7MPa。对试样的断口表面进行了宏观与微观分析。结果表明,试样断裂面均不平整,部分试样存在明显的裂纹。微观分析表明,Ba^(2+)和SO_(4)^(2-)生成亮白色新相BaSO_(4)。此外,Al_(2)O_(3)的添加不仅可以细化NaCl相的尺寸,还使BaSO4相从块状转变成鱼骨状,起到弥散强化的作用,这是盐芯强度提高的重要机制。The distribution ratio of soluble salt core and its manufacturing process were investigated.The salt core was prepared by melt casting method,and the bending strength of the prepared salt core was tested.The bending strength can reach up to 52.7 MPa.The fracture surface of the sample was observed.Macro analysis shows that the fracture surfaces of the samples are uneven,and some samples have obvious cracks.Microscopic analysis reveals that Ba^(2+)and SO_(4)^(2-)can generate bright white new phase BaSO_(4).In addition,the addition of Al_(2)O_(3)can refine the size of NaCl phase,and lead to the transformation of BaSO_(4)phase from blocky to fishbone,playing a role of dispersion strengthening,which is an important mechanism for improving the strength of salt core.

关 键 词：熔融浇注 可溶性 盐芯 

分 类 号：TG249.2[金属学及工艺—铸造]