摘要
研究了锰量在小于 2 5 %范围内变化时 ,灰铸铁的结晶特性与组织变化。试验表明 :锰显著增大铸铁共晶过冷度 ,细化共晶团 ,促进D、E型石墨的形成 ,有较强的白口倾向 ,可有效细化基体组织 ,促进硬化相网孔组织的形成。试验发现 ,反石墨化的正偏析元素锰可促进一种新型的“逆B型”石墨出现 ,其分布特征完全区别于现已命名的A型～F型石墨。
The present paper studies the evolution of the crystallization and structure characters when the variation of manganese content in gray cast iron is less than 2.5%. The results show that manganese greatly increases the degree of eutectic undercooling, refines the eutectic colony, favors the formation of graphite of type D and E, shows a strong tendency of whitening, can effectively refine the matrix structure and favor a reticulate hardening phase formed. The results reveal that manganese, as a positive segregation and anti-graphitization alloying element, facilitates the presence of a novel anti-B type' graphite, whose distribution patterns are completely different from that of the presently known graphite of A～F types.
出处
《铸造》
CAS
CSCD
北大核心
2001年第8期477-481,共5页
Foundry
关键词
锰铸铁
结晶
显微组织
石墨分布
manganese alloying cast gray iron
crystallization
microstructure
graphite distribution
