摘要
采用自行研制的压力凝固试验装置,研究了ZL101铝合金消失模铸造过程中,不同的压力和加压速率对铸件性能的影响。试验结果表明,随着外加压力的增加,铸件的密度和力学性能逐步提高,孔隙率显著降低,当外加压力达到0.5MPa以上时,ZL101消失模铸件的力学性能提高趋缓;加压时,不同的加压速率对消失模铸件的密度及性能影响很大,当加压速率为0.003～0.030MPa/s时,铝合金消失模铸件性能较好;由于在压力下凝固,ZL101铝合金消失模铸件针孔等缺陷减少、密度提高,铸件耐腐蚀性进一步提高。
We have developed a set of pressurization solidification experimental apparatus to examine the effects of varied pressures and pressurization rate on mechanical properties of lost foam casting ZL101 aluminum alloy components. The results show that with increasing in applied pressure,the density and mechanical properties of the lost foam casting ZL101 alloy components are improved gradually,and porosity rate in the castings is greatly decreased,meanwhile,the mechanical properties of the castings exhibit slightly increasing tendency. With a fixed pressure,the density and properties of the casting are closely related to the pressurization rates. The lost foam casting ZL101 alloy components exhibit desirable performance at pressurization rate of 0.003 MPa^0.03 MPa. In addition,corrosion resistance of the alloy components is further improved as a result of the increase of density and decrease of pin-hole defects in the components at pressurization solidification.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第7期638-641,共4页
Special Casting & Nonferrous Alloys
基金
国家高技术研究发展计划(863计划)资助项目(2007AA03Z113)
关键词
消失模铸造
铝合金
加压凝固
加压速率
组织性能
Lost Foam Casting,Aluminum Alloy,Pressurization Solidification,Pressurization Rate,Microstructure and Properties
作者简介
唐波，男，1985年出生，硕士研究生，华中科技大学材料成形与模具技术国家重点实验室，武汉（430074），电话：027-87543876，E-mail：beixiangtang@foxmail．com
通讯作者：樊自田，男，1962年出生，教授，华中科技大学材料成形与模具技术国家重点实验室，武汉（430074），电话：027-87543876，E-mail：fanzt@mail．hust．edu．cn
