铸造压力对AZ91D镁合金流变压铸件致密性的影响  

Effects of Casting Pressure on Compactness of Rheo-diecasting AZ91D Magnesium Alloy Parts

作　　者：杨柳青[1] 康永林[1] 张帆[1] 丁瑞华[1] 李炯 

机构地区：[1]北京科技大学材料科学与工程学院 [2]北京广灵精华科技有限公司

出　　处：《特种铸造及有色合金》2010年第7期630-632,共3页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2006CB605203);国家高技术研究发展计划(863计划)资助项目(2006AA03Z115);"十一五"国家科技支撑计划资助项目(2006BAE04B09-4)

摘　　要：采用自行开发的锥桶式流变成形机(Taper barrel rheomoulding machine,简称TBR),并结合TOYOBD-900V4-T型压铸机,研究了铸造压力对AZ91D镁合金流变压铸件内部微观孔洞形态以及密度的影响。结果表明,铸造压力的增大可以明显改善流变压铸件内部微观孔洞缺陷,增大铸件密度。铸造压力小于65MPa时,压力对流变压铸件微观孔洞及密度的影响较大;而大于65MPa时,铸造压力的影响较小。We have developed a taper barrel rheomoulding machine combining with Toyo-BD-900V4-T die casting machine to understand effects of casting pressure on micro-hole morphology and density of rheo-diecasting AZ91D magnesium alloy parts.The results reveal that increasing in casting pressure can greatly eliminate the micro-hole in rheo-diecasting parts,increasing the density.The casting pressure has directly affected the micro-hole and density of the casting with pressure less than 65 MPa,however,effects of pressure can be neglected with more than 65MPa.

关 键 词：铸造压力 AZ91D镁合金 流变压铸 致密性 

分 类 号：TG292[金属学及工艺—铸造]