Cgi cast iron and a production method for the same

A manufacturing method and cast iron technology, applied in the field of hypereutectic CGI cast iron, can solve the problems of poor casting and poor CGI cast iron material, etc.

Active Publication Date: 2012-09-12
DOOSAN INFRACORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In spite of such precise control, there are still problems such as the following: due to errors in various required conditions such as magnesium content, filling position, filling temperature, filling speed, etc., poor material and poor casting of CGI cast iron often occur

Method used

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  • Cgi cast iron and a production method for the same
  • Cgi cast iron and a production method for the same
  • Cgi cast iron and a production method for the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10 and comparative example 1-10

[0081] According to the composition of Table 1 below, cast irons of Examples 1-10 and Comparative Examples 1-10 were produced.

[0082] Table 1

[0083] unit weight%

[0084] differentiate

C

Si

mn

Cu

sn

Mg

P

S

Fe

Example 1

3.650

2.240

0.440

1.360

0.090

0.017

0.031

trace

remaining

Example 2

3.680

2.190

0.400

1.340

0.090

0.010

0.031

trace

remaining

Example 3

3.700

2.110

0.390

1.410

0.080

0.011

0.031

trace

remaining

Example 4

3.710

2.080

0.400

1.330

0.100

0.009

0.034

trace

remaining

Example 5

3.680

2.140

0.380

1.260

0.080

0.011

0.031

trace

remaining

Example 6

3.680

2.180

0.430

1.340

0.090

0.018

0.0...

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Abstract

The present invention relates to cast iron, and more specifically relates to CGI (Compacted Graphite Iron) cast iron in which the amounts of carbon (C), silicon (Si), manganese (Mn), copper (Cu), tin (Sn) and magnesium (Mg) are controlled during production, thereby improving the castability and also giving a stable tensile strength and yield strength and giving an appropriate range of hardness, and also to a production method for the same.

Description

technical field [0001] The present invention relates to cast iron and its manufacturing method, and more specifically, to cast iron having improved castability and stable tensile strength and yield strength by controlling the content of ingredients added to iron, and its manufacturing method. The cast iron according to the present invention belongs to hypereutectic CGI (compacted graphite iron: compacted graphite iron) cast iron which is particularly suitable for a cylinder block of a high output diesel engine. Background technique [0002] In recent years, since environmental regulations have been strengthened, it is inevitable to reduce the content of environmental pollutants such as Cox or NOx discharged from engines. [0003] In the case of a diesel engine, in order to reduce the emission of the above-mentioned environmental pollutants such as Cox or NOx, it is necessary to increase the explosion pressure of the engine. Thus, in order to increase the explosion pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10
CPCC22C33/08C22C37/10C21C1/08C21C7/0006
Inventor 梁植沈东燮
Owner DOOSAN INFRACORE CO LTD
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