摘要
采用新型自孕育流变铸造法,研究了自孕育流变铸造法及熔体处理温度对ZL101合金组织的影响。结果表明,自孕育流变铸造能有效细化组织,晶粒尺寸主要分布在25～49μm范围内,平均等效圆直径为37μm。熔体处理温度为710℃时孕育剂加入量为5%,导流器倾斜角为45°时达到最好细化效果。经分析认为,孕育剂的加入促进了初生α-Al相的形核,而导流器的剪切和激冷作用促使树枝晶破碎形成新的形核质点,两方面的作用使金属凝固时存在大量的晶核,从而细化了组织。
Effects of self-inoculation method (SIM) and melt treated temperature on as-cast microstructure of ZL101 semi-solid slurry prepared by a novel self-inoculation rheoforming method were investigated.The results show that grain with 25～49 μm in size and 37 μm in average equivalent spherical diameters can be observed in self-inoculated ZL101 alloy slurry.The desirable refinement can be obtained in the alloy slurry with 5% self-inoculators addition at 710 ℃ by flowing on the deflector with 45°.Inoculator addition can promote the nucleation of primary α-Al,and shearing and chilling effects of deflector can generate new nuclei by broking dendrite,which results in the increase of grain size during alloy solidification,greatly refining grain size in the alloy slurry.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第5期417-420,共4页
Special Casting & Nonferrous Alloys
基金
甘肃省国际科技合作计划项目(090WCGA894)
