公开(公告)号：KR1020090093291A

公开(公告)日：2009-09-02

申请号：KR1020080018736

申请日：2008-02-29

Applicant: 현대자동차주식회사

Inventor： 안정근 ,  신호철 ,  이재기 ,  홍명구

IPC: C22C37/00 ,  C22C37/04 ,  C22C38/00

CPC classification number: C22C37/10 ,  C22C37/06

Abstract: A CGI cast iron is provided to have the various variable properties through the change of the matrix tissue by controlling the content of copper and tin of a molten metal. A CGI cast iron comprises a iron(Fe) which is the main component, carbon(C) 3.45~3.55 weight%, silicon(Si) 2.30~2.40 weight%, magnesium(Mg) 0.002~0.008 weight%, copper(Cu) 0.10~0.90 weight%, tin(Sn) 0.01~0.09 weight%, chrome(Cr) 0.03~0.07 weight%, manganese(Mn) 0.30~0.35 weight%, phosphorus(P) 0.1 weight%, and sulfur(S) 0.1 weight% or less. The carbon is added in order to maximize the process graphite amount extrusion rate. The silicon is added in order to maximize the process CGI graphite constant output amount. The magnesium is added for the CGI graphite nucleation and growth acceleration. The copper is added in order to manufacture the low hardness and high tenacity cast iron. The chrome is added for the graphite miniaturization. The manganese is added for the graphite miniaturization and pearlite stabilization.

Abstract translation: 通过控制熔融金属的铜和锡的含量，通过改变基体组织来提供CGI铸铁以具有各种可变性。 CGI铸铁包括铁（Fe），主要成分为碳（C）3.45〜3.55重量％，硅（Si）2.30〜2.40重量％，镁（Mg）0.002〜0.008重量％，铜（Cu） 0.10〜0.90重量％，锡（Sn）0.01〜0.09重量％，铬（Cr）0.03〜0.07重量％，锰（Mn）0.30〜0.35重量％，磷（P）0.1重量％，硫（S）0.1 重量％以下。 加入碳以最大化石墨量的挤出速率。 添加硅以便最大化工艺CGI石墨的恒定输出量。 添加镁用于CGI石墨成核和生长加速。 加入铜以制造低硬度和高强度的铸铁。 添加铬用于石墨小型化。 添加锰用于石墨小型化和珠光体稳定化。