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Cast iron material for cylinder sleeve, cylinder sleeve and preparation method thereof

A cylinder liner and cast iron technology, which is applied in the field of engine cylinder liners, can solve the problems of high production cost and achieve the effects of stable product quality, excellent mechanical properties, and simple preparation process

Active Publication Date: 2019-05-03
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pearlite content in the above-mentioned gray cast iron material is relatively high, and its tensile strength is about 400MPa, but the content of precious alloying elements such as molybdenum, nickel, tin, etc. is relatively high, resulting in high production costs

Method used

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  • Cast iron material for cylinder sleeve, cylinder sleeve and preparation method thereof
  • Cast iron material for cylinder sleeve, cylinder sleeve and preparation method thereof
  • Cast iron material for cylinder sleeve, cylinder sleeve and preparation method thereof

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preparation example Construction

[0038]The preparation method of the cylinder liner of the present invention comprises the following steps: 1) smelting and casting raw materials to make a billet; 2) heat-treating the billet to obtain the final product.

[0039] Casting is pouring molten iron into a mold, leaving the cylinder and cooling; the temperature of the poured molten iron is 1350-1400°C, and the temperature of the mold is 450-500°C. When the casting is cooled to 600-650°C in the mold, it will leave the cylinder.

[0040] Before casting, a wet coating is coated on the inner wall of the mold, and the wet coating is composed of the following components in weight percentage: 16-22% of Changbai diatomite, 6-8% of sodium bentonite, 70-75% of water, 1 to 3% phenolic resin.

[0041] Carry out inoculation treatment to molten iron, described inoculation treatment comprises the first inoculation treatment and the second inoculation treatment carried out in sequence, the inoculant used in the first inoculation tr...

Embodiment 1

[0047] The cast iron material for the cylinder liner of this embodiment is composed of the following elements by weight: C: 2.8%, Si: 2.2%, Mn: 2.25%, Mo: 0.15%, Nb: 0.15%, P: ≤0.1%, S: ≤ 0.1%, the balance is Fe.

Embodiment 2

[0049] The cast iron material for the cylinder liner of this embodiment is composed of the following elements by weight: C: 3.0%, Si: 1.8%, Mn: 2.1%, Mo: 0.1%, Nb: 0.1%, P: ≤0.1%, S: ≤ 0.1%, the balance is Fe.

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Abstract

The invention belongs to the technical field of engine cylinder sleeves, and particularly relates to a cast iron material for a cylinder sleeve, the cylinder sleeve and a preparation method thereof. The cast iron material for the cylinder sleeve is prepared the following components in percentage by weight: 2.7-3.2% of C, 1.8-2.3% of Si, 2.0-2.5% of Mn, 0.1-0.3% of Mo, 0.1-0.3% of Nb, smaller thanor equal to 0.1% of P, smaller than or equal to 0.1% of S and the balance of Fe. According to the cast iron material for the cylinder sleeve, only a small amount of noble elements of Mo and Nb are added, the total weight of the Mo and the Nb is no more than 0.5%, the type of alloy is few, and the content of the alloy is low. The strength of extension at room temperature of the cylinder sleeve madeof the cast iron material for the cylinder sleeve reaches up to about 470 MPa, and the strength level is much stronger than the higher level of an existing pearlite-based gray cast iron cylinder sleeve.

Description

technical field [0001] The invention belongs to the technical field of engine cylinder liners, and in particular relates to a cast iron material for a cylinder liner, a cylinder liner and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and increasingly stringent emission requirements, the upgrading of engine products is also accelerating. As one of the core components of the engine, the service conditions of the cylinder liner are becoming increasingly harsh and harsh. Therefore, in order to improve the service life of cylinder liners and meet the requirements of high-standard emissions, cylinder liner products usually need to add a large amount of alloying elements to improve their mechanical properties and prolong their service life. For example, in the prior art, the Chinese invention patent document whose authorized notification number is CN100510365C discloses a cylinder liner of multi-element alloyed cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21C1/08C21D1/26C21D5/00C21D9/00B22D13/04
CPCY02P10/20
Inventor 熊毅岳赟姚怀周甜路妍陈艳娜贺甜甜曹伟张凌峰任凤章秦小才高广东刘治军
Owner HENAN UNIV OF SCI & TECH
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