Preparation method for cast iron cylinder liner based on inner surface coating

An inner surface and coating technology, which is applied in the direction of coating, casting molding equipment, metal material coating technology, etc., can solve the problem that it is difficult to meet the requirements of cylinder liner strength, wear resistance and cost, the high production cost of cylinder liner, the use of Short service life and other problems, to achieve the effect of low manufacturing cost, convenient processing, and extended service life

Active Publication Date: 2018-01-23
ZYNP GRP ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production cost of the traditional cylinder liner is high, the running-in time is long, the bite force is poor, the service life is short, and it is difficult to meet the requirements of high-performance energy-saving and environmentally friendly engines for the strength, wear resistance and cost of the cylinder liner

Method used

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  • Preparation method for cast iron cylinder liner based on inner surface coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) 100 parts by mass of silicon micropowder with a particle size of 325-400 mesh, 25 parts by mass of sodium bentonite with a particle size of 325-400 mesh, 23 parts by mass of high-alumina bauxite with a particle size of 325-400 mesh, and 1.1 parts by mass of Add sodium stearate, 33 parts by mass and benzoxazine resin with a particle size of 325 to 400 meshes, and 1.2 parts by mass of copper chloride in the wheel-type sand mixer, and mix and grind for 25 minutes; pour the rolled material into After adding 200 parts by mass of water into the mixing tank, the mixture was stirred at a speed of 200 rpm for 3 hours to prepare the coating.

[0033] 2) Dosing according to the following chemical composition percentage: C: 3.0%~3.2%, Si: 2.5%~3.0%, S: ≤0.1%, P: ≤0.2%, Cr: 0.5%~0.6%, Ni : 0.1%~0.2%, Mo: 0.2%~0.3%, Cu: 0.4%~0.5%, Ti: ≤0.03%, rare earth ferrosilicon alloy inoculant: 0.8%, the rest is Fe, pour the above ingredients into the medium frequency induction furnace Melti...

Embodiment 2

[0039] 1) 100 parts by mass of silicon micropowder with a particle size of 325-400 mesh, 28 parts by mass of sodium bentonite with a particle size of 325-400 mesh, 25 parts by mass of high-alumina bauxite with a particle size of 325-400 mesh, and 1.2 parts by mass of Add sodium stearate, 35 parts by mass of benzoxazine resin with a particle size of 325 to 400 meshes, and 1.2 parts by mass of copper chloride in a wheel-type sand mixer, and mix and grind for 30 minutes; pour the rolled material into After adding 210 parts by mass of water into the mixing tank, the mixture was stirred at a speed of 220 rpm for 3 hours to prepare the coating.

[0040] 2) Dosing according to the following chemical composition percentage: C: 3.0%~3.2%, Si: 2.5%~3.0%, S: ≤0.1%, P: ≤0.2%, Cr: 0.5%~0.6%, Ni : 0.1%~0.2%, Mo: 0.2%~0.3%, Cu: 0.4%~0.5%, Ti: ≤0.03%, rare earth ferrosilicon alloy inoculant: 0.8%, the rest is Fe, pour the above ingredients into the medium frequency induction furnace Melting ...

Embodiment 3

[0046] 1) 100 parts by mass of silica powder with a particle size of 325-400 mesh, 30 parts by mass of sodium bentonite with a particle size of 325-400 mesh, 25 parts by mass of high-alumina bauxite with a particle size of 325-400 mesh, and 1.2 parts by mass of Add sodium stearate, 35 parts by mass and benzoxazine resin with a particle size of 325 to 400 meshes, and 1.3 parts by mass of copper chloride in the wheel-type sand mixer, and mix and grind for 30 minutes; pour the rolled material into In the mixing bucket, after adding 220 parts by mass of water, the mixture was stirred at a speed of 230 rpm for 4 hours to prepare the coating.

[0047] 2) Dosing according to the following chemical composition percentage: C: 3.0%~3.2%, Si: 2.5%~3.0%, S: ≤0.1%, P: ≤0.2%, Cr: 0.5%~0.6%, Ni : 0.1%~0.2%, Mo: 0.2%~0.3%, Cu: 0.4%~0.5%, Ti: ≤0.03%, rare earth ferrosilicon alloy inoculant: 0.8%, the rest is Fe, pour the above ingredients into the medium frequency induction furnace Melting is...

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Abstract

The invention discloses a preparation method for a cast iron cylinder liner based on an inner surface coating. The coating is formed by coating the inner wall of a mold with a paint with an optimizedformula, a casting is cast through a centrifugal casting mode and then subjected to ultrasonic treatment through a hydrogen ethanol solution, then the inner wall of the casting is subjected to roughening through a high-speed sand blasting mode, and finally a co-diffusion coating is formed through co-diffusion with a co-diffusion agent. The yield of the cast iron cylinder liner is up to 96.3-97.2%,compared with traditional cylinder liners of the type on the market, the abrasion resistance of the cast iron cylinder liner is improved by 33.9-35.1%, and thus the service life of the cast iron cylinder liner can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of cylinder liners, in particular to a method for preparing a cast iron cylinder liner based on an inner surface coating. Background technique [0002] The cylinder liner is the abbreviation of the cylinder liner. It is inlaid in the cylinder barrel of the cylinder block and forms the combustion chamber together with the piston and the cylinder head. Cylinder liners are divided into two categories: dry cylinder liners and wet cylinder liners. The cylinder liner whose back side does not contact the cooling water is called a dry cylinder liner, and the cylinder liner whose back side is in contact with cooling water is a wet cylinder liner. The dry cylinder liner has a thinner thickness, simple structure and convenient processing. The wet cylinder liner is in direct contact with the cooling water, so it is beneficial to the cooling of the engine, and is conducive to the miniaturization and weight reduction of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10B22C3/00C23C8/72C23C8/02F02F1/00
Inventor 黄德松
Owner ZYNP GRP ANHUI CO LTD
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