摘要
在普通球墨铸铁的基础上,通过强化孕育,细化石墨球,减轻锰的偏析,研究了Mn-Cu和Mn-Sb合金元素对球墨铸铁微观组织和性能的影响。试验表明:锰对球墨铸铁性能的影响存在一个临界区间(Mn质量分数为0.8%～0.9%),当低于该区间时,球铁的塑性较高。在Mn含量低于该区间情况下,加入适量Cu后,可以获得高强度高塑性的球铁。Mn质量分数为0.58%～0.6%,Cu质量分数为0.80%,球铁抗拉强度可达795～830MPa,伸长率为5.5%～6.6%,硬度为270～283HB。
Based on common nodular cast iron, the influence of Mn-Cu and Mn-Sb on microstructure and mechanical properties of ductile iron was studied by intensifying inoculation, increasing the spherical graphite count, reducing the segregation of Mn. The experimental results show that the influence of Mn on the mechanical properties of ductile iron has a critical value （mass fraction,0.8%-0.9% Mn）, below which the nodular iron posses high ductility. The high strength and high ductility is found when Cu is added. The tensile strength is up to 795 -830 MPa, elongation is 5.5%-6.6%, hardness is 270-283 HB by adding 0.58-0.6% Mn and 0.8% Cu in ductile iron.
出处
《热加工工艺》
CSCD
北大核心
2008年第21期47-49,共3页
Hot Working Technology
关键词
合金化
球墨铸铁
组织
性能
alloying
ductile iron
structure
properties
