Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area

A high wear-resistant, cylinder liner technology, applied in the field of cylinder liner casting technology, 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: 2013-11-13
王维涛
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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%; Si2.1%; Mn0.8%; P0.1%; S0.02% ; Cu0.8%; Cr0.25%; Fe92.38%, when the smelting temperature reaches 1550 ° C, add synthetic particles in proportion, of which Ti0.35%, Sb0.2%, after the particles are added, purify for 6 minutes, and then carry out twice For inoculation, the inoculant is inoculated in the large bag first, and then in the pouring ladle; the pouring temperature is 1350 ° C ~ 1320 ° C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; Quenching in the solution to transform the metallographic structure of the cylinder liner into lower bainite.

example 2

[0011] Example 2: First process Ti and Sb into synthetic particles of 2-3mm for later use; then the alloy is smelted in proportion, among which C3.3%; Si2.4%; Mn1.1%; P0.2%; S0.08% ; Cu1.1%; Cr0.35%; Fe90.62%, when the smelting temperature reaches 1550 ° C, add synthetic particles in proportion, of which Ti0.45%, Sb0.4%, after the particles are added, purify for 6 minutes, and then carry out twice For inoculation, the inoculant is inoculated in the large bag first, and then in the pouring ladle; the pouring temperature is 1350°C-1320°C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; Quenching in the solution to transform the metallographic structure of the cylinder liner into lower bainite.

example 3

[0012] Example 3: first process Ti and Sb into synthetic particles of 2-3mm for later use; then the alloy is smelted in proportion, among which C3.15%; Si2.25%; Mn0.95%: P0.15%; S0.05% ; Cu0.95%; Cr0.3%; Fe91.5%, when the smelting temperature reaches 1550 ° C, add synthetic particles in proportion, of which Ti0.4%, Sb0.3%, after the particles are added, purify for 6 minutes, and then carry out twice For inoculation, the inoculant is inoculated in the large bag first, and then in the pouring ladle; the pouring temperature is 1350°C-1320°C; the pouring speed is 2kg / s; the cooling intensity is water cooling for 120 seconds; Quenching in the solution to transform the metallographic structure of the cylinder liner into 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 a casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area. The cylinder sleeve comprises 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% of Cu, 0.25-0.35% of Cr and 90.62-92.38% of Fe. The casting process for the cylinder sleeve comprises the following steps of firstly processing Ti and Sb into synthetic particles with the diameter of 2-3 mm for use; mixing the alloy according to proportions and melting; adding the synthetic particles when a melting temperature reaches 1,550 DEG C; purifying for 6 minutes after the particles are added; then carrying out twice inoculations, firstly inoculating a nucleating agent in a large ladle and then inoculating in a casting ladle, wherein a casting temperature is 1,350 DEG C-1,320 DEG C; a casting speed is 2 kg / s; a cooling intensity is water-cooled 120 seconds; putting a blank with a temperature of about 600 DEG C into a solution for quenching; and transferring a metallographic structure of the cylinder sleeve into a lower bainite. The cylinder sleeve can increase usage performance and abrasion performance of the engine, prolongs service life, reduces energy consumption, improves exhaust quality of the engine and protects natural environment.

Description

technical field [0001] The invention relates to a casting process of a cylinder liner, in particular to a casting process of a western 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08B22D1/00C21D1/18C21D5/00
Inventor 王维涛
Owner 王维涛
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