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Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same

A gray cast iron and cylinder liner technology, applied in the field of gray cast iron, can solve the problems of increasing manufacturing costs

Inactive Publication Date: 2016-10-19
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while using scrap can maintain high strength while reducing production costs, expensive alloying elements may be added, increasing manufacturing costs

Method used

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  • Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same
  • Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same
  • Gray cast iron for cylinder liner and method for manufacturing cylinder liner using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] Hereinafter, the present invention will be described with reference to comparative examples and inventive examples.

[0037] The final product is produced according to the production conditions of commercially produced cylinder liners, and samples are produced based on the final product. Then, hardness, tensile strength, fatigue strength, thermal fatigue life, and processability were measured.

[0038] As shown in Table 1, in Inventive Examples 1 and 2 and Comparative Examples 1 to 5, molten steels having adjusted component contents were prepared, and then each cylinder liner was manufactured by a centrifugal casting method. In addition, samples were prepared from the manufactured cylinder liners.

[0039] [Table 1]

[0040]

[0041] Meanwhile, after flattening the prepared sample, the hardness was measured using a Brinell machine (Brinell machine), the tensile strength was measured by machining a cylinder liner with a KS D0801 8A sample, and the fatigue strength w...

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Abstract

The invention provides a gray cast iron for a cylinder liner and a method for manufacturing the cylinder liner using the same. The gray cast iron for the cylinder liner is provided that maintains fatigue strength and thermal shock property by adjusting component contents. The gray cast iron includes carbon (C) in an amount of about 3.2 to 3.7 weight % (wt %); silicon (Si) in an amount of about 2.0 to 2.8 wt %; manganese (Mn) in an amount of about 0.50 to 1.0 wt %; phosphorus (P) in an amount of about 0.20 wt % or less, and greater than about 0 wt %; sulfur (S) in an amount of about 0.10 wt % or less, and greater than about 0 wt %; chromium (Cr) in an amount of about 0.50 wt % or less, and greater than about 0 wt %; copper (Cu) in an amount of about 0.20 to 0.80 wt %; molybdenum (Mo) in an amount of about 0.10 to 0.40 wt %; and the balance of iron (Fe), based on the total weight of the gray cast iron.

Description

technical field [0001] The present invention relates to gray cast iron for cylinder liners (cylinder liners, cylinder liners, cylinder liners) and methods of manufacturing cylinder liners using gray cast iron. In particular, gray cast iron for cylinder liners can maintain fatigue strength and thermal shock properties by adjusting the content of molten steel composition (molten steel composition) used to manufacture gray cast iron. Background technique [0002] Since gray cast iron is low in cost and has excellent properties, it has been widely used for cylinder blocks, cylinder heads, and cylinder liners of engines of vehicles. When used and manufactured, those constituent parts of the vehicle can be used to trade off material properties such as tensile strength, fatigue strength, etc. Various components of cast iron. [0003] Recently, due to an increase in vehicle production, enhancement of environmental management, and the like, the loads on the span body, the cover, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10B22D13/00
CPCC22C33/08C22C37/06C22C37/10B22D13/02B22D13/00
Inventor 南悳铉
Owner HYUNDAI MOTOR CO LTD