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Casing method of alloy cast iron cylinder jacket

A technology of alloy cast iron and cylinder liner, which is applied in the field of cylinder liner casting and alloy cast iron cylinder liner casting to achieve the effect of compact structure, ensuring dimensional accuracy and improving service life

Active Publication Date: 2018-10-26
CRRC QISHUYAN INSTITUTE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the above-mentioned technical problems, the present invention proposes a method for casting an alloy cast iron cylinder liner. By improving the casting process, it can properly solve the casting bottleneck problem of an alloy cast iron cylinder liner with a complex structure, and obtain compact structure, microstructure, graphite form and comprehensive Alloy cylinder liner with excellent performance

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  • Casing method of alloy cast iron cylinder jacket
  • Casing method of alloy cast iron cylinder jacket
  • Casing method of alloy cast iron cylinder jacket

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The present embodiment provides a method for casting an alloy cast iron cylinder liner, comprising the following steps:

[0052] (1) Molding and core making: use furan resin sand to make the outer mold of the upper, middle and lower box structure structure respectively through the upper box tire mold, middle box tire mold and lower box tire mold; use furan resin sand to pass through the upper main body core mold 1. The main body core mold in the middle section and the main body core mold in the lower section are divided into three sections to make the main body core;

[0053] (2) Manufacture of film-coated sand cores: Use coated sand to make side riser cores, bottom cores, petal cores, water hole cores, upper petal cores and top cores, and then superimpose and fix the bottom cores, petal cores, The water hole core, the upper petal core and the top core, the side riser is preset on the side of the bottom core, the water hole core and the petal core, and the side riser co...

Embodiment 2

[0066] The embodiment provides a casting method of an alloy cast iron cylinder liner, the casting mold is consistent with the structure of embodiment 1, the main difference is the difference in the casting process, and the casting method mainly includes the following steps:

[0067] (1) Molding and core making: use furan resin sand to make the outer mold of the upper, middle and lower box structure structure respectively through the upper box tire mold, middle box tire mold and lower box tire mold; use furan resin sand to pass through the upper main body core mold 1. The main body core mold in the middle section and the main body core mold in the lower section are divided into three sections to make the main body core;

[0068] (2) Manufacture of film-coated sand cores: Use coated sand to make side riser cores, bottom cores, petal cores, water hole cores, upper petal cores and top cores, and then superimpose and fix the bottom cores, petal cores, The water hole core, the upper...

Embodiment 3

[0074] The embodiment provides a casting method of an alloy cast iron cylinder liner, the casting mold is consistent with the structure of embodiment 1, the main difference is the difference in the casting process, and the casting method mainly includes the following steps:

[0075] (1) Molding and core making: use furan resin sand to make the outer mold of the upper, middle and lower box structure structure respectively through the upper box tire mold, middle box tire mold and lower box tire mold; use furan resin sand to pass through the upper main body core mold 1. The main body core mold in the middle section and the main body core mold in the lower section are divided into three sections to make the main body core;

[0076] (2) Manufacture of film-coated sand cores: Use coated sand to make side riser cores, bottom cores, petal cores, water hole cores, upper petal cores and top cores, and then superimpose and fix the bottom cores, petal cores, The water hole core, the upper...

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Abstract

The invention discloses a casing method of an alloy cast iron cylinder jacket. The casing method comprises the following steps of mold shaping and core manufacturing, precoated sand core manufacturing, core positioning and fixing, metallurgical smelting, nucleating agent pouring and post-treatment. Reasonable component design is adopted, strengthen inoculation measures of carborundum pre-treatment, ladle-transferring stream inoculation and pouring stream inoculation, and high temperature smelting and sedation are adopted to obtain a high-quality alloy cast iron material with A-type graphite more than 95%, graphite grade of 4-5, pearlite content more than 95%, tensile strength more than 300Mpa, bulk hardness of HB210-270; and the service life of the cylinder jacket is prolonged.

Description

technical field [0001] The invention relates to a method for casting a cylinder liner, in particular to a method for casting an alloy cast iron cylinder liner, and belongs to the technical field of metal casting. Background technique [0002] As the core component of the engine, the cylinder liner is subjected to high temperature, high pressure, high load, and very harsh working conditions, so its performance is very important. Due to the complex structure of the cylinder liner and extremely high density requirements, the microstructure, graphite shape, graphite size and mechanical properties of different parts of the cylinder liner also have very strict requirements, so casting is very difficult. Although centrifugal casting, which has been widely used for a long time, has the characteristics of compact structure and high work efficiency, it is very suitable for casting cylinder liner blanks as regular rotary bodies, but the following problems are prone to occur in practice...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C9/08B22C9/10B22C9/22C22C37/10C22C37/08C22C33/08C21C1/08
CPCB22C9/02B22C9/088B22C9/103B22C9/22C21C1/08C22C33/08C22C37/08C22C37/10Y02P10/20
Inventor 杨志刚朱正锋吴凯都亚军
Owner CRRC QISHUYAN INSTITUTE CO LTD
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