镂空铸型对HT300组织和力学性能的影响  

Effect of Hollow Mold on Microstructure and Mechanical Property of HT300

作　　者：张龙江 马秉平 刘天平 苏少静 纳建虹 ZHANG Long-jiang;MA Bing-ping;LIU Tian-ping;SU Shao-jing;NA Jian-hong(Kocel Machinery Limited,Yinchuan Ningxia 750021,China)

机构地区：[1]共享装备股份有限公司,宁夏银川750021

出　　处：《铸造设备与工艺》2022年第2期23-24,48,共3页Foundry Equipment & Technology

基　　金：宁夏回族自治区重点研发计划(项目编号:2020BCE01003)。

摘　　要：通过砂型3D打印技术,打印了镂空和密实砂型,并对比研究了镂空和密实铸型对HT300-φ30 mm试棒的冷却速率、显微组织和力学性能的影响规律。结果表明,镂空铸型下试棒的冷却速率更快;密实铸型的石墨形态为95%A+5%E,镂空铸型的石墨形态为90%A+10%D+E,D形石墨占比增加;铸型镂空后HT300的抗拉强度提高至334 MPa,提高了10 MPa.Hollow sand mold and dense sand mold were printed by sand mold 3D printing technology,and the effects of hollow sand mold and dense sand mold on the cooling rate,microstructure and mechanical properties of HT300-φ30 mm test bar were studied.The results show that the cooling rate of the test bar is faster under hollow casting.The graphite morphology of dense casting is95%A+5%E,and that of hollow casting is 90% A+10% D+E,and the proportion of D-shaped graphite increases. The tensile strength of HT300 is increased to 334 MPa,which is increased by 10 MPa.

关 键 词：HT300 组织 力学性能 镂空铸型 

分 类 号：TG242[金属学及工艺—铸造] TP391.73[自动化与计算机技术—计算机应用技术]