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High-abrasion-resistance anti-dust cylinder liner casting technology

A casting process and cylinder liner technology, applied in the field of high wear-resistant and sand-dust-resistant cylinder liner casting process, can solve problems such as shortening the service life of the engine, and achieve the effects of improving wear resistance, enhancing wear resistance, and uniform particle dispersion

Inactive Publication Date: 2014-02-12
韦波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The highest instantaneous temperature during the combustion process is as high as 2200-2400°C, and the highest instantaneous pressure is as high as 12-14MPa. The inner wall of the cylinder liner is directly subjected to high temperature, high pressure, and melting and sticking. The abrasive wear is increased under the working conditions, which further shortens the service life of the engine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Example 1: First process Ti and Sb into synthetic particles with a size of 2-3mm for later use; then the alloy is smelted in proportion, among which C3.0%; Si 2.1%; Mn 0.8%; P 0.1%; S 0.02%; Cu 0.8% ; Cr 0.25%; Fe 92.38%, when the smelting temperature reaches 1550°C, add synthetic particles in proportion, of which Ti 0.35%, Sb 0.2%, the particles are added and purified for 6 minutes, and then inoculated twice. Incubate in the middle, and then incubate in the pouring bag; the pouring temperature is 1350°C ~ 1320°C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; The metallographic structure transforms to lower bainite.

example 2

[0011] Example 2: First process Ti and Sb into synthetic particles with a size of 2-3mm for later use; then the alloy is smelted according to the proportion of ingredients, among which C3.3%; Si 2.4%; Mn 1.1%; P 0.2%; S 0.08%; Cu 1.1% ; Cr 0.35%; Fe 90.62%, when the smelting temperature reaches 1550°C, add synthetic particles in proportion, of which Ti 0.45%, Sb 0.4%, the particles are added and purified for 6 minutes, and then inoculated twice. Incubate in the middle, and then incubate in the pouring bag; the pouring temperature is 1350°C ~ 1320°C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; The metallographic structure transforms to lower bainite.

example 3

[0012] Example 3: first process Ti and Sb into synthetic particles with a size of 2-3mm for later use; then the alloy is melted in proportion, among which C3.15%; Si 2.25%; Mn 0.95%; P 0.15%; S 0.05%; Cu 0.95% ; Cr 0.3%; Fe 91.5%, when the smelting temperature reaches 1550°C, add synthetic particles in proportion, of which Ti 0.4%, Sb 0.3%, after the particles are added, purify for 6 minutes, and then carry out two inoculations. Incubate in the middle, and then incubate in the pouring bag; the pouring temperature is 1350°C ~ 1320°C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; The metallographic structure transforms to lower bainite.

[0013] The cylinder liner formed by introducing Ti and Sb synthetic particles into the HT300 cast iron solution has a tensile strength greater than 300MPa and a hardness greater than 310HB.

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Abstract

The invention discloses high-abrasion-resistance anti-dust cylinder liner casting technology. The casting technology is characterized by including following alloy elements of 3.0-3.3% of C, 2.1-2.4% of Si, 0.8-1.1% of Mn, 0.1-0.2% of P, 0.02-0.08% of S, 0.35-0.45% of Ti, 0.2-0.4% of Sb, 0.8-1.1% Cu, 0.25-0.35% of Cr and 90.62- 92.38% of Fe. A production technology method includes: firstly, processing the Ti and Sb into synthetic particles 2-3mm in size for standby application; secondly, compounding and smelting alloy proportionally, adding the synthetic particles proportionally when the smelting temperature reaches to 1550 DEG C, purifying for 6 minutes after the particles are added, then performing inoculation twice by inoculating an inoculant in a bale prior to inoculating in a pouring ladle, and controlling the pouring temperature to be 1350-1320 DEG C, pouring speed to be 2kg / s and cooling intensity to be water cooling for 120 seconds; thirdly, when a blank stripped from a die is at the temperature of 600 DEG C, placing the blank into a solution for quenching to enable a metallographic structure of a cylinder liner to be changed into a lower bainite.

Description

technical field [0001] The invention relates to a casting process of a cylinder liner, in particular to a casting process of a high wear-resistant and dust-resistant cylinder liner. Background technique [0002] Due to the deteriorating environment, in most areas of my country, especially the northern and central western areas, the dust is relatively large, and the hard particles are easily sucked into the engine cylinder, causing abrasive wear and seriously affecting the service life of the engine. [0003] The cylinder is the core part of the engine, the space where the gas is compressed, burned and expanded, and the trajectory that the piston moves. The highest instantaneous temperature during the combustion process is as high as 2200-2400°C, and the highest instantaneous pressure is as high as 12-14MPa. The inner wall of the cylinder liner is directly subjected to high temperature, high pressure, and melting and sticking. The abrasive wear is increased under the working...

Claims

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Application Information

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IPC IPC(8): B22D1/00C22C37/10C22C33/08C21C1/08C21D1/18C21D5/00
Inventor 韦波
Owner 韦波
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