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As-cast state bainite vehicle cylinder cover

A bainite and cylinder liner technology, applied in the direction of cylinders, engine components, mechanical equipment, etc., can solve the problems of high raw material cost, and achieve the effect of good graphite shape, cost reduction and production cycle shortening.

Inactive Publication Date: 2008-05-07
严方
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the whole society attaches great importance to environmental protection, engines are developing towards high power and small volume, and the requirements for cylinder liners, an important part of automobile engines, are getting higher and higher. The metallographic and physical and chemical indicators of ordinary low-alloy cylinder liners cannot meet the requirements for use. The metallographic structure and mechanical properties of the cylinder liner with bainite structure can meet the requirements of high strength, but in order to obtain the bainite structure in the casting process, it is necessary to add precious alloy elements such as Ni and Mo in the smelting process, raw materials cost a lot

Method used

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Examples

Experimental program
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Embodiment Construction

[0008] Use an intermediate frequency electric furnace to distribute ingredients (%) according to the following chemical composition: C: 2.8-3.0, Si: 1.8-2.2, Mn: 0.4-0.6, P<0.1, S<0.1, Cu: 1.7, Mo: 0.7, Ni: 0.2 , slowly raise the temperature to about 1400°C, take samples for testing, and after the chemical composition is adjusted to pass, the temperature of the molten iron in the electric furnace is quickly raised to 1570-1600°C, and the conventional inoculation is started. Cast in the range of 1460°C, cool the casting mold to about 1150°C, implement water cooling, stop cooling when the temperature of the casting blank reaches 700°C, and the blank is released from the mold.

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Abstract

The invention provides an as-cast bainite cylinder. In order to resolve the technical problems, the invention adopts the technical proposal that the Cu content in the chemical composition of the cylinder is increased to 1.7 percent to replace part of Ni and Mo; simultaneously, the high-temperature melting technique is adopted in order to obtain the as-cast bainite. The invention has the advantages of saving the costly materials, shortening the production period and reducing the environment pollution.

Description

Technical field [0001] The invention relates to a casting and forming production process of an automobile cylinder liner. Background technique [0002] As the whole society attaches great importance to environmental protection, the engine is developing towards high power and small volume, and the requirements for the cylinder liner, an important part of the automobile engine, are getting higher and higher. The metallographic and physical and chemical indicators of ordinary low-alloy cylinder liners cannot meet the use requirements. The metallographic structure and mechanical properties of the cylinder liner with bainite structure can meet the requirements of high strength, but in order to obtain the bainite structure in the casting process, precious alloy elements such as Ni and Mo need to be added in the smelting process, raw materials The cost is huge. Contents of the invention [0003] In order to improve the mechanical performance of the automobile cylinder liner and ...

Claims

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Application Information

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IPC IPC(8): C22C38/16B22D11/18F16J10/04
Inventor 严方
Owner 严方
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