陶粒砂与硅砂在3D打印砂型中的性能对比研究  

Comparative Study on Properties of Ceramsite Sand and Silica Sand in 3D Printing Sand Mold

作　　者：杨小平 郭永斌 刘轶 张景豫 YANG Xiao-ping;GUO Yong-bin;LIU Yi;ZHANG Jing-yu(National Intelligent Foundry Innovation Center Co.,Ltd.,Yinchuan 750021,China)

机构地区：[1]共享智能铸造产业创新中心有限公司,宁夏银川750021

出　　处：《现代铸铁》2019年第4期46-48,共3页Modern Cast Iron

基　　金：国家重点研发计划项目：铸造砂型高效增材制造装备材料制备方法研究（项目编号：2016YFB1101002）

摘　　要：对比研究了陶粒砂与硅砂在3D打印铸造砂型中的性能,试验采用铸造3D打印机分别以陶粒砂和硅砂打印砂型,并用打印出的柴油机缸盖和机床床身砂型浇注铸件,对比结果显示:(1)采用3D打印机同参数打印的砂芯,陶粒砂砂芯抗压强度较硅砂砂芯高出18%,紧实度也高于硅砂,透气性高出25%;(2)陶粒砂砂芯浇注的柴油机缸盖铸件无粘砂和脉状纹缺陷,合格率高于硅砂浇注的铸件;(3)对于较大的机床铸件,陶粒砂铸件相比硅砂铸件存在较多的机械粘砂缺陷,但清理较为容易,陶粒砂因膨胀系数低,铸件内腔不易产生脉状纹缺陷;(4)陶粒砂的再生率为99.25%,较硅砂94.36%的再生率存在明显优势。The performance of ceramsite sand and silica sand in 3D printing casting sand type was compared.The test was carried out by casting 3D printer with ceramsite sand and silica sand printing sand,and using the printed diesel engine cylinder head and machine bed sand mold to cast.The results were compared showed that:(1)Under the same 3D printer parameter,the compressive strength of ceramsite sand core was 18%higher than that of silica sand core,the compactness was also higher,and the gas permeability was 25%higher.(2)The diesel engine cylinder head castings from ceramsite sand core had no stick sand and vein pattern defects,and the qualified rate was higher than that of the silicon sand casting.(3)For larger machine tool castings,the ceramsite sand castings had more mechanical sanding defects but cleaning was easier.The ceramsite sand had a low expansion coefficient so the inner cavity of the casting was not easy to produce vein-like defects.(4)The regeneration rate of ceramsite sand was 99.25%,which was 94.36%higher than that of silica sand.There were obvious advantages.

关 键 词：陶粒砂 3D打印 机械粘砂 

分 类 号：TG242.5[金属学及工艺—铸造]