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Spiral groove cast-in type air cylinder sleeve and preparation method thereof

A cylinder liner and spiral groove technology, which is applied in the field of energy-saving and lightweight spiral groove cast-in cylinder liner and its preparation, can solve the problems of black smoke from exhaust, low bonding strength, and pollute the environment, so as to improve the processing accuracy and size High stability and reduced labor intensity

Active Publication Date: 2016-03-30
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cylinder liner is one of the key parts of the engine. After the cylinder liner is worn out, it will cause difficulty in starting the diesel engine, poor combustion of diesel in the cylinder, black smoke from the exhaust, and pollute the environment.
The cutting performance of the traditional spiral groove cast-in cylinder liner is poor, the bonding strength with the cylinder block after die casting is low, and it is easy to delaminate and crack. Therefore, it is urgent to develop a spiral groove with good machinability, dimensional stability and wear reduction. cast-in cylinder liner

Method used

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  • Spiral groove cast-in type air cylinder sleeve and preparation method thereof
  • Spiral groove cast-in type air cylinder sleeve and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] An energy-saving and lightweight spiral groove cast-in cylinder liner, its chemical composition is calculated as follows in weight percentage (%): C: 2.8, Si: 1.2, P: 0.2, S: 0.06, Mn: 0.3, Cu: 0.3, Cr : 0.2, Mo: 0.1, Sn: 0.1, V: 0.05, and the balance is Fe.

[0019] The preparation method of the above-mentioned energy-saving and lightweight spiral groove cast-in cylinder liner includes the following steps:

[0020] (1) The raw materials are proportioned, and the molten iron is obtained by smelting in a medium-frequency induction furnace. The temperature of the molten iron is controlled at 1450 ° C ~ 1500 ° C. Before casting, the molten iron is treated with an inoculant twice. Ferrosilicon inoculant, and the addition amount is 0.4% of the mass of molten iron, and the second inoculation treatment is 75 silicon strontium inoculant, and the addition amount is 0.1% of the mass of molten iron;

[0021] (2) Cylinder liner castings are prepared by metal-type wet paint centrif...

Embodiment 2

[0027] An energy-saving and lightweight spiral groove cast-in cylinder liner, its chemical composition is calculated as follows in weight percentage (%): C: 3, Si: 1.6, P: 0.35, S: 0.1, Mn: 0.5, Cu: 0.5, Cr : 0.35, Mo: 0.2, Sn: 0.15, V: 0.03, and the balance is Fe.

[0028] The preparation method of the above-mentioned energy-saving and lightweight spiral groove cast-in cylinder liner includes the following steps:

[0029] (1) The raw materials are proportioned, and the molten iron is obtained by smelting in a medium-frequency induction furnace. The temperature of the molten iron is controlled at 1450 ° C ~ 1500 ° C. Before casting, the molten iron is treated with an inoculant twice. Ferrosilicon inoculant, and the addition amount is 0.6% of the mass of molten iron, and the second inoculation treatment uses 75 silicon strontium inoculant, and the addition amount is 0.2% of the mass of molten iron;

[0030] (2) Cylinder liner castings are prepared by metal-type wet paint centr...

Embodiment 3

[0034] An energy-saving and lightweight spiral groove cast-in cylinder liner, its chemical composition is calculated as follows in weight percentage (%): C: 3.5, Si: 2.1, P: 0.5, S: 0.12, Mn: 0.7, Cu: 0.7, Cr : 0.5, Mo: 0.4, Sn: 0.2, V: 0.15, and the balance is Fe.

[0035] The preparation method of the above-mentioned energy-saving and lightweight spiral groove cast-in cylinder liner includes the following steps:

[0036] (1) The raw materials are proportioned, and the molten iron is obtained by smelting in a medium-frequency induction furnace. The temperature of the molten iron is controlled at 1450 ° C ~ 1500 ° C. Before casting, the molten iron is treated with an inoculant twice. Ferrosilicon inoculant, and the addition amount is 0.8% of the mass of molten iron, and the second inoculation treatment uses 75 silicon strontium inoculant, and the addition amount is 0.3% of the mass of molten iron;

[0037] (2) Cylinder liner castings are prepared by metal-type wet paint centr...

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Abstract

The invention belongs to the technical field of air cylinder sleeves, and particularly relates to an energy-saving light spiral groove cast-in type air cylinder sleeve and a preparation method thereof. The air cylinder sleeve is prepared from, by weight percentage, 2.8%-3.5% of carbon, 1.2%-2.1% of silicon, 0.2%-0.5% of phosphorus, 0.06%-0.12% of sulfur, 0.3%-0.7% of manganese, 0.3%-0.7% of copper, 0.2%-0.5% of chromium, 0.1%-0.4% of molybdenum, 0.1%-0.2% of tin, larger than 0 and smaller than or equal to 0.05% of vanadium and the balance iron. According to the air cylinder sleeve, through smelting, casting and machining, graphite on the wear surface of the material of the air cylinder sleeve is evenly distributed in a flaky shape, fine lamellar pearlite bodies are the main of the base body structure of the friction surface, the hardness ranges from 94 HRB to 104 HRB, and tensile strength is larger than or equal to 360 MPa. After casting, the bonding strength of the air cylinder sleeve and a cylinder body is high and is 40 MPa or more.

Description

technical field [0001] The invention belongs to the technical field of cylinder liners, and in particular relates to an energy-saving and lightweight spiral groove cast-in type cylinder liner and a preparation method thereof. Background technique [0002] The cylinder liner is one of the key parts of the engine. The wear of the cylinder liner will cause difficulty in starting the diesel engine, poor combustion of diesel in the cylinder, black smoke from the exhaust, and pollution of the environment. The cutting performance of the traditional spiral groove cast-in cylinder liner is poor, the bonding strength with the cylinder block after die casting is low, and it is easy to delaminate and crack. Therefore, it is urgent to develop a spiral groove with good machinability, dimensional stability and wear reduction. Cast-in cylinder liner. Contents of the invention [0003] The object of the present invention is to provide an energy-saving and lightweight spiral groove cast-in...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/02C22C38/04C22C38/12C22C38/16C22C38/18C22C33/04B23P15/00B22D13/00
CPCB22D13/00B23P15/00C22C33/04C22C38/002C22C38/008C22C38/02C22C38/04C22C38/12C22C38/16C22C38/18C22C38/60
Inventor 周广辉曾应鸽付君义贺绍府
Owner ZYNP GRP
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