摘要
简述了薄壁球墨铸铁容易产生白口组织的原因,抑制白口组织的生成应促进石墨化、增加石墨球数。介绍了化学成分C、Si、S、Mn、稀土元素及球化、孕育处理对石墨化的影响。应通过严格控制铁液成分、加强孕育并适当添加稀土元素,促使铁液充分石墨化,增加石墨球数来有效抑制白口生成。
It is described the reasons of chilling microstructure is easy to produce in the thin-wall ductile cast iron;in order to suppress the microstructure,the graphitization should be promoted and the amount of spherical graphite should be increased.Then the effects of chemical composition of C,Si,S,Mn,rare earth elements and spheroidization-inoculation on graphitization are introduced.To effectively restrain chill microstructure generation,graphitization should be prompted and the number of spherical graphite is increased by strictly controlling the composition of melting iron,strengthening inoculation and addinng appropriate RE.
出处
《热加工工艺》
CSCD
北大核心
2011年第19期22-25,共4页
Hot Working Technology
关键词
薄壁
球墨铸铁
白口组织
石墨化
thin-wall
ductile cast iron
chill microstructure
graphitization
