固液混合铸造制备高合金锭坯的工艺研究  

Preparation of High Aluminum Alloy Ingot by Solid-liquid Mixed Casting

作　　者：刘劲松[1] 陈振华[2] 蒲玉兴[2] 何建军[2] 李建跃[1] 

机构地区：[1]长沙航空职业技术学院机械系 [2]湖南大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第4期281-283,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50274037)

摘　　要：采用固液混合铸造制备了Al-10Mn和Al-10Cr合金坯料,研究了制备工艺及其对材料组织及性能的影响。采用先加入一定的粉末,搅拌后再分多次加入剩余粉末的加粉方式。当合金熔体的过热度为10～40℃、搅拌器转速为500r/min,压铸模温度为500～600℃时,能够获得组织均匀、细小的固液混合铸造合金。随着加粉量的增加和粉末粒度的减小,铸造坯料的力学性能也随之升高,这两种新合金可以应用于耐磨、耐蚀材料。The Al-10Mn and Al-10Cr alloy ingot were prepared by solid-liquid mixed casting.The effects of processing parameters on the microstructure and mechanical properties of the alloys were investigated.The alloys with homogeneous and fine microstructure were prepared under the optimized processing parameters including stirring rate at 500 r/min,temperature of die casting die of 500 ℃ and super-heating temperature of 20℃.The mechanical properties of two kinds of alloys suitable for wear resistant and corrosion resistant materials are increased with increasing in powder addition and decreasing in particle size.

关 键 词：固液混合铸造 AL-MN合金 AL-CR合金 

分 类 号：TG27[金属学及工艺—铸造]