Title:
SPHEROIDAL GRAPHITE CAST IRON, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2018204082
Kind Code:
A
Abstract:
To provide a spheroidal graphite cast iron having selection of main chemical components and structure, and further extremely high level hardness and tensile strength by a simple method, without using expensive chemical components nor using complex processes or treatments such as an austempering treatment.SOLUTION: There is provided a manufacturing method of a spheroidal graphite cast by casting a molten metal with a chemical composition containing, by mass%, C:3.0 to 4.0%, Si:1.5 to 2.5%, Mn:1.0% or less, P:0.04% or less, S:0.03% or less, Mg:0.02 to 0.1%, Cu:1.8 to 3.3%, Sn:0.01 to 0.05%, and the balance Fe with inevitable impurities with a second inoculation of 0.05 to 0.15 mass% of Fe-Si in terms of Si equivalence, conducting early shake-out at a state of austenite and conducting cooling.SELECTED DRAWING: Figure 1
Inventors:
MIYOSHI TAKURO
MIYOSHI TOSHIYUKI
MIYOSHI TOSHIYUKI
Application Number:
JP2017113105A
Publication Date:
December 27, 2018
Filing Date:
June 08, 2017
Export Citation:
Assignee:
OUME CHUZO KK
International Classes:
C21C1/10; B22D1/00; C22C37/04
Domestic Patent References:
| JP2009191342A | 2009-08-27 | |||
| JP2013079418A | 2013-05-02 | |||
| JPS57109562A | 1982-07-08 | |||
| JP2009197311A | 2009-09-03 | |||
| JP2004339577A | 2004-12-02 | |||
| JP2002317219A | 2002-10-31 | |||
| JP2002317238A | 2002-10-31 | |||
| JP2001131678A | 2001-05-15 | |||
| JP2014194052A | 2014-10-09 |
Foreign References:
| WO2013100148A1 | 2013-07-04 |
Attorney, Agent or Firm:
Mitsuo Takahashi
Daisuke Takahashi
Daisuke Takahashi