挤压铸造压力对铝合金铸件微观孔洞影响的研究  

Experiment on Microporosity in Squeezing Casting Aluminum Alloy Parts

作　　者：杨文[1] 李金玺[1] 韩志强[1] 赵海东[2] 柳百成[1] 

机构地区：[1]清华大学机械工程系 先进成形制造教育部重点实验室 [2]华南理工大学机械工程学院

出　　处：《特种铸造及有色合金》2010年第1期54-56,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50675113);清华大学实验室开放基金资助项目(LF20082538)

摘　　要：使用LECORHEN602测氢仪检测了A356铝合金熔体的氢含量,并对不同挤压压力下(40、60、80MPa)凝固的挤压铸造试样进行了图像分析,测得试样不同部位的微观孔洞的尺寸和体积分数。对比分析结果表明,试样整体微观孔洞的尺寸和体积分数均随挤压压力的增大而减小。Hydrogen content in aluminum alloy melt was measured with LECO RHEN602 hydrogen determinator,and microporosity size and its volumetric fraction in different location of squeezing casting aluminum alloy parts,which were produced at 40,60 and 80MPa,were measured by image analysis technology.Quantitative relationship between microporosity,volumetric fraction and applied pressure was presented.The results indicate that both microporosity size and its volumetric fraction in the parts are decreased with increasing in applied pressure.

关 键 词：挤压铸造 铝合金 微观孔洞 氢含量 挤压压力 

分 类 号：TG249.2[金属学及工艺—铸造]