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Nano-coating cylinder sleeve and preparing method thereof

A nano-coating and cylinder liner technology, applied in the field of cylinder liner, can solve problems such as air leakage and water leakage, engine scrapping, etc., and achieve good anti-cavitation and corrosion resistance, and good anti-cavitation effect.

Active Publication Date: 2017-03-15
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Cylinder liners are divided into dry type cylinder liners and wet type cylinder liners according to whether the outer surface is in direct contact with cooling water. Due to cooling water quality or use problems, existing wet type cylinder liners often occur at the position where the outer surface is in contact with cooling water. Large areas of cavitation and corrosion, and some even cavitation and perforation cause air and water leakage, resulting in scrapped engines

Method used

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  • Nano-coating cylinder sleeve and preparing method thereof
  • Nano-coating cylinder sleeve and preparing method thereof
  • Nano-coating cylinder sleeve and preparing method thereof

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preparation example Construction

[0041] The invention provides a method for preparing a nano-coated cylinder liner, comprising the following steps:

[0042] a), coating the nano-coating liquid on the outer surface of the cylinder liner substrate, drying to obtain the nano-coated cylinder liner;

[0043] The nano-coating liquid includes nano-SiO 2 Particles, poly-o-toluene, epoxy resins and organic solvents.

[0044] In the preparation method provided by the invention, firstly, the nano-coating liquid is coated on the outer surface of the cylinder liner substrate. In the present invention, the source of the cylinder liner matrix is ​​not particularly limited, and it can be prepared according to the following method:

[0045] 1), raw material is smelted in smelting furnace, obtains molten iron;

[0046] II), the molten iron is inoculated to obtain the inoculated molten iron;

[0047] III), centrifugal casting is performed after the inoculated molten iron is released from the furnace to obtain a cylinder lin...

Embodiment 1

[0058] A gray cast iron cylinder liner, the chemical composition of the cylinder liner material is as follows in weight percent (%): C: 3.22, Si: 2.15, P: 0.07, S: 0.03, Mn: 0.56, Ti: 0.21, the balance For Fe.

[0059] The above-mentioned gray cast iron cylinder liner production process comprises the following steps:

[0060] (1) Proportionate ingredients, smelting with intermediate frequency coreless induction furnace, control the temperature of molten iron out of the furnace at 1390 ° C, and treat the molten iron twice with inoculants before the furnace, the first treatment is 75 ferrosilicon inoculants and add The amount is 0.6% of the mass of molten iron, and the prefabricated blocks of titanium powder and graphite powder are added in an amount of 0.5% of the mass of molten iron. The second treatment is silicon strontium inoculant, and the addition is 0.2% of the mass of molten iron. Centrifugal casting is carried out after the liquid is released from the furnace to obtai...

Embodiment 2

[0067] A gray cast iron cylinder liner, the chemical composition of the cylinder liner material is as follows in weight percent (%): C: 2.96, Si: 2.46, P: 0.21, S: 0.08, Mn: 0.89, Ti: 0.35, the balance For Fe.

[0068] The above-mentioned gray cast iron cylinder liner production process comprises the following steps:

[0069] (1) Ingredients are proportioned, smelted in an intermediate frequency coreless induction furnace, the temperature of the molten iron is controlled at 1400°C, and the molten iron is treated with an inoculant twice before the furnace is released. The first treatment is a 75 ferrosilicon inoculant and added The amount is 0.5% of the mass of molten iron, and the prefabricated blocks of titanium powder and graphite powder are added in an amount of 0.7% of the mass of molten iron. The second treatment is silicon strontium inoculant, and the addition is 0.12% of the mass of molten iron. Centrifugal casting is carried out after the liquid is released from the f...

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Abstract

The invention belongs to the field of cylinder sleeves, and particularly relates to a nano-coating cylinder sleeve and a preparing method thereof. The nano-coating cylinder sleeve comprises a cylinder sleeve base body, and a nano-coating compounded on the outer surface of the cylinder sleeve base body, wherein the nano-coating comprises a nano-SiO2 particle, poly (o -toluidine) and epoxy resin. According to the nano-coating cylinder sleeve and the preparing method thereof, nano-coating with certain components is compounded on the outer surface of the cylinder sleeve base body, and thus the nano-coating cylinder sleeve has good cavitation erosion resistance and corrosion resistance. Experimental results show that the resistance value of the cylinder sleeve is larger than 1010 Omega.cm<2>, t100 is around 880 min, while t100 of a cylinder sleeve without the coating is 450 min, thus proving that the cavitation resistance of the nano-coating cylinder sleeve is obviously better than those of the cylinder sleeves without the coating.

Description

technical field [0001] The invention belongs to the field of cylinder liners, in particular to a nano-coated cylinder liner and a preparation method thereof. Background technique [0002] The car engine is the engine that provides power for the car. It is the heart of the car and affects the power, economy and environmental protection of the car. According to different power sources, automobile engines can be divided into diesel engines, gasoline engines, etc. [0003] The cylinder block of automobile engine is divided into cast iron and cast aluminum. Cast aluminum engines have the advantages of light weight and good heat dissipation, and have been widely used in the industry. However, their mechanical properties, wear resistance, and thermal stability are not as good as those of cast iron. For this reason, the industry currently adopts the method of casting aluminum cylinder block and cast iron insert to solve this problem. The cast iron insert applied to aluminum cylind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D179/02C09D7/12C09D5/08C22C37/10
CPCC08K2201/011C09D5/08C09D7/61C09D163/00C09D179/02C22C37/10C08L79/02C08K3/36C08L63/00
Inventor 姜玉领郭进京赵慧刘栋
Owner ZYNP GRP