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A needle-punched cylinder liner and preparation method thereof

A cylinder liner and acupuncture technology, which is applied in the field of cylinder liners, can solve the problems of uneven acupuncture size and distribution, poor bonding strength and bonding rate between cylinder liners and aluminum cylinder blocks, and affecting the performance of acupuncture-shaped cylinder liners, etc. Problems, to achieve moderate size, improve heat dissipation efficiency, improve bonding strength and bonding rate

Active Publication Date: 2019-02-19
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The needle-punched shape of the outer surface of the needle-punched cylinder liner is closely related to its preparation process conditions. The existing needle-punched cylinder liner has the phenomenon of uneven needle size and needle distribution on the outer surface, which causes the cylinder liner to be inconsistent with the aluminum cylinder. The bonding strength and bonding rate between the bodies are poor, which affects the heat dissipation efficiency of the engine and seriously affects the performance of the acupuncture-shaped cylinder liner

Method used

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  • A needle-punched cylinder liner and preparation method thereof
  • A needle-punched cylinder liner and preparation method thereof
  • A needle-punched cylinder liner and preparation method thereof

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preparation example Construction

[0043] The present invention provides a method for preparing a needle punched cylinder liner, which includes the following steps:

[0044] a) Prepare a coating solution, which includes 0.05-0.4 parts by weight of anionic surfactant, 0.05-0.5 parts of tannin, 0.15-0.7 parts of caustic soda, and 22-38 parts of diatom Soil, 3-10 parts of montmorillonite and 62-75 parts of water;

[0045] b) Spray the coating liquid on the inner wall of the hollow cylindrical mold and dry it to obtain a mold with a coating on the inner wall surface;

[0046] c) adding the inoculated molten iron to the rotating mold with the coating on the inner wall surface, and then exiting the mold after cooling to obtain a cylinder liner blank;

[0047] d). The outer surface of the cylinder liner blank is cleaned and formed in sequence to obtain a needled cylinder liner.

[0048] In the preparation method provided by the present invention, the coating liquid is first prepared. Wherein, the coating liquid includes anion...

Embodiment 1

[0068] Needle punched cylinder liner preparation

[0069] 1) Coating formula design:

[0070]

[0071] 2) Paint preparation

[0072] Add anionic surfactants, tannins, caustic soda, diatomaceous earth, montmorillonite and water into the stirring container, stir evenly to obtain paint.

[0073] 3) Preparation of finished cylinder liner

[0074] 3-1) Cast iron material smelting: Put pig iron and scrap steel into a coreless intermediate frequency induction furnace for melting. After melting, add ferrosilicon, phosphorous, ferromanganese, ferrochrome, electrolytic copper, ferrous sulfide and other alloy materials according to the analysis results of the spectrometer. After the melting is uniform, the composition is confirmed by the spectrometer, and the molten iron with qualified composition is obtained. Through fine-tuning, the mass percentages of the ingredients in the raw materials are as follows: carbon 3.62wt%, sulfur 0.04wt%, silicon 2.07wt%, phosphorus 0.18wt%, manganese 0.62wt%, ch...

Embodiment 2

[0078] Needle punched cylinder liner preparation

[0079] 1) Coating formula design:

[0080]

[0081] 2) Paint preparation

[0082] Add anionic surfactants, tannins, caustic soda, diatomaceous earth, montmorillonite and water into the stirring container, stir evenly to obtain paint.

[0083] 3) Preparation of finished cylinder liner

[0084] 3-1) Cast iron material smelting: Put pig iron and scrap steel into a coreless intermediate frequency induction furnace for melting. After melting, add ferrosilicon, phosphorous, ferromanganese, ferrochrome, electrolytic copper, ferrous sulfide and other alloy materials according to the analysis results of the spectrometer. After the melting is uniform, the composition is confirmed by the spectrometer, and the molten iron with qualified composition is obtained. Through fine-tuning, the mass percentages of the ingredients in the raw materials are as follows: carbon 3.31wt%, sulfur 0.08wt%, silicon 2.68wt%, phosphorus 0.07wt%, manganese 0.94wt%, ch...

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Abstract

The invention belongs to the field of cylinder liners, and particularly relates to a needle-punched cylinder liner and a preparation method thereof. The preparation method comprises the following steps: (a) preparing a coating liquid which comprises the following components in parts by weight: 0.05-0.4 part of an anionic surfactant, 0.05-0.5 part of tannin, 0.15-0.7 part of caustic soda, 22-38 parts of diatomite, 3-10 parts of montmorillonite and 62-75 parts of water; (b) spraying the coating liquid onto the inner wall of a hollow cylindrical mold, and drying to obtain a mold of which the inner wall surface is coated; (c) adding a nucleated iron liquid into the rotary mold of which the inner wall surface is coated, and demolding after cooling, so as to obtain a cylinder liner blank; and (d) subjecting the cylinder liner blank to external surface cleaning and formation machining in sequence, so as to obtain the needle-punched cylinder liner. Moderate-sized and uniformly-distributed bulges are formed on the excircle surface of the needle-punched cylinder liner obtained according to the preparation method provided by the invention.

Description

Technical field [0001] The invention belongs to the field of cylinder liners, and particularly relates to a needle-punched cylinder liner and a preparation method thereof. Background technique [0002] The all-aluminum engine has the advantages of light weight and good heat dissipation performance. It has been widely used in the industry, but its mechanical properties, wear resistance and thermal stability are not as good as cast iron. For this reason, the current industry uses aluminum cylinder blocks and cast iron inserts to solve this problem. [0003] Cast iron inserts used in aluminum cylinder blocks are also called cylinder liners. Currently, the most demanded cylinder liners in the market are needle-punched cylinder liners. Needle-like cylinder liners are directly cast from molten iron, and the outer surface is distributed with needle-like ridges. These needle-like shapes can increase the bonding force and thermal conductivity of the cylinder liner and the aluminum cylinder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00B22D13/00F02F1/00
CPCB22C3/00B22D13/00F02F1/004
Inventor 薛德龙刘治军党增军王勇侯起飞
Owner ZYNP GRP
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