镁合金消失模壳型铸造中型壳的制备及工艺研究  

Research of Shell Preparation Process in Lost Foam Shell Casting for Magnesium Alloy

作　　者：彭乔元[1,2] 郑开宏[2] 张新明[1] 李林[2] 唐建国[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]广东省工业技术研究院(广州有色金属研究院)金属成型与加工技术研究所,广东广州510650

出　　处：《铸造技术》2013年第2期187-189,共3页Foundry Technology

摘　　要：采用硅溶胶粘结剂、刚玉耐火材料制备镁合金薄壁型壳,研究了涂料粉液比、涂料粘度、焙烧温度等参数对型壳抗弯强度、断口形貌的影响规律。结果表明:当粉液比为3.2,焙烧温度为1 200℃时,硅溶胶-刚玉型壳具有较高的强度,型壳抗弯强度达到4.3 MPa。但考虑镁合金的特性和对型壳的性能要求,800℃焙烧型壳对镁合金性能最优。A thin shell for magnesium alloy casting was manufactured taking silicon sol as binder and corundum as refractories, the effect law of coating powder/solution ratio, coating viscosity, baking temperature etc on the bending strength and fracture morphology was studied. The results show that, when powder/solution ratio is 3.2 and baking temperature is 1 200 ℃, the silicon sol-corundum shell has high strength, the bending strength of the shell is 4.3 MPa. Considering the characteristic of magnesium alloy and the performance requirements to shell, the appropriate baking temperature is 800 ℃.

关 键 词：消失模铸造 薄壁壳型 粉液比 镁合金 

分 类 号：TG292[金属学及工艺—铸造]