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Production method of wear-resistant cylinder sleeve

A production method and cylinder liner technology, which is applied in the production field of wear-resistant cylinder liners, can solve the problems of wear resistance and deformation resistance limitations, and achieve the effects of improving wear resistance, increasing high-temperature hardness, and reducing friction

Inactive Publication Date: 2016-10-26
ZYNP GRP ANHUI CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, the cylinder liners on the market are mainly cast iron materials, which have certain limitations in wear resistance and deformation resistance.

Method used

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Embodiment Construction

[0019] The present invention is further supplemented below in conjunction with specific examples, but the present invention is not limited in any way.

[0020] A method for producing a wear-resistant cylinder liner, comprising the following steps:

[0021] Step 1: Melt high-quality steel scrap, molten iron and intermediate alloys in an intermediate frequency electric furnace, and control the chemical composition of the engine cylinder liner to: C2.8-3.1, Si2.6-3.0, Mn1.2-1.5, P≤0.2 , S≤0.10, Cr0.4-0.6, Ni0.1-0.2, Mo0.2-0.3, Cu0.6-0.8, Sn0.3-0.5, the balance is iron and unavoidable impurities; the melting temperature is 1550- 1600°C;

[0022] Step 2: The inoculation treatment is carried out twice, including adding a large dose of 0.4%-0.6% inoculant for the first ladle inoculation treatment; adding a small dose of 0.1%-0.3% inoculant for the second inoculation with the flow deal with;

[0023] Step 3: first make the rotational speed of the centrifugal casting machine 480-520...

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Abstract

The invention discloses a production method of a wear-resistant cylinder sleeve. The production method comprises the following steps that 1, high-quality steel scrap, molten iron and intermediate alloy are used as raw materials to be smelted in a medium frequency furnace; 2, the smelted product is inoculated at twice; 3, the rotational speed of a centrifugal casting machine is set to 480-520 rad / min, and the inoculated product is poured; 4, the drainage interval time is 30-35 s after the pouring is completed, and then the poured product is water-cooled to be lower than 200 DEG C; 5, a cylinder sleeve is tempered in a heat treatment furnace; 6, a cylinder sleeve casting is placed in a ceramic-penetrated furnace to be electrified and preheated for 2.5 h; 7, the ceramic-penetrated furnace is vacuumized; 8, nitrogen, silane and borane are introduced in the ceramic-penetrated furnace; 9, the ceramic-penetrated furnace is insulated, and ceramic penetrates through the cylinder sleeve; and 10, the cylinder sleeve is cooled and discharged. Compared with the prior art, the production method has the beneficial effects that the wear resistance of the material is improved, the friction coefficient of the material is reduced, and oil consumption of an engine is reduced.

Description

technical field [0001] The invention relates to the technical field of cylinder liner production, in particular to a production method of a wear-resistant cylinder liner. Background technique [0002] Cylinder liner is a widely used part in automobile engines. Its main functions are sealing, heat conduction, and forming a sliding surface with piston rings. It is one of the core components of the engine. The main failure modes are deformation, crack and wear. Cylinder liner cracks are very harmful and will directly lead to car recalls, while deformation and wear will directly affect engine fuel consumption, emission levels, and life of friction pairs. For the automotive industry, no matter what kind of parts, it is hoped that the The price is to obtain the longest possible service life. [0003] At present, the cylinder liners on the market are mainly cast iron materials, which have certain limitations in wear resistance and deformation resistance. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/04C21D9/40C22C37/08C22C37/10C23C8/28F02F1/00
CPCB22D13/04C21D9/40C22C37/08C22C37/10C23C8/28F02F1/004Y02P10/20
Inventor 黄德松杨俊朱斌
Owner ZYNP GRP ANHUI CO LTD
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