CN103388102A - Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area - Google Patents
Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area Download PDFInfo
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- CN103388102A CN103388102A CN2012101424859A CN201210142485A CN103388102A CN 103388102 A CN103388102 A CN 103388102A CN 2012101424859 A CN2012101424859 A CN 2012101424859A CN 201210142485 A CN201210142485 A CN 201210142485A CN 103388102 A CN103388102 A CN 103388102A
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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
The present invention relates to cylinder liner casting technology, be specifically related to a kind of western high abrasion desertification dirt cylinder liner casting technology.
Background technology
Due to the deterioration increasingly of environment, China's most areas is northern especially, central and west regions, and sand and dust are larger, and hard particulate very easily sucks engine cylinder, produces abrasive wear, has a strong impact on the work-ing life of engine.
Cylinder is the engine core part, is the space of gas compression, burning expansion, is the track of piston motion guiding.The highest transient temperature in combustion processes is up to 2200～2400 ℃, the highest transient pressure is up to 12～14MPa, the inwall of cylinder sleeve directly is subject to the effect of high temperature, high pressure, fusible, if cylinder sucks the particulate sand and dust again, make cylinder inner wall increase again abrasive wear under the extreme working conditions that worsens, further shortened the work-ing life of engine.
Cylinder sleeve is one of important friction pair of engine, and its wear resistance directly has influence on the consumption of life-span, power, fuel oil and the machine oil of engine.Along with improving constantly of engine movement velocity, mechanical property stress and thermal stresses that its cylinder sleeve, piston, piston ring bear are more and more high, the wearing and tearing of the cylinder of diesel engine internal friction pair that causes therefrom, and particularly the sand and dust abrasive wear is even more serious.
The material cylinder sleeve such as the traditional high-phosphorous iron of China, boron cast iron, low-alloy cast iron, vanadium-titanium cast iron have not adapted to the demand of present high-grade engine with supercharger.Its main wear form has: abrasive wear, scuff wear, corrosive wear etc.Along with the improving constantly of diesel engine strengthening, its movement velocity and explosion pressure all are greatly improved, so the wear problem of cylinder sleeve is also day by day serious in recent years.Therefore, development anti-abrasion type cylinder sleeve is very important.
Summary of the invention
The invention provides a kind of western high abrasion desertification dirt cylinder liner casting technology, adopt this kind cylinder sleeve to improve the engine use properties, increase the service life, reduce energy consumption, improve the engine exhaust emission quality, the conservation of nature environment.
Technical solution of the present invention is to contain following alloying element: C3.0～3.3% in this cylinder sleeve; Si2.1～2.4%; Mn0.8～1.1%; P0.1～0.2%; S0.02～0.08%; Ti0.35～0.45%; Sb0.2～0.4%; Cu0.8～1.1%; Cr0.25～0.35%; Fe90.62～92.38%.
Cylinder sleeve method of manufacturing technology of the present invention is: at first Ti and Sb being processed into synthetic particle is that 2-3mm is standby; Then the alloy melting of preparing burden in proportion, add synthetic particle in proportion when smelting temperature reaches 1550 ℃, particle added afterpurification 6 minutes, then carries out breeding for twice, first nucleating agent bred in large bag, then breeding in pouring ladle; Teeming temperature is 1350 ℃～1320 ℃; Pouring speed is 2kg/s; Cooling intensity is water-cooled 120 seconds; Put into solution during 600 ℃ of left and right after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.
The present invention has the following advantages: 1. add Ti and Sb to synthesize particle in Cast Iron Melts, particle dispersion is even, the dense structure of cylinder sleeve, and Heat stability is good, have good oil storage capacity and excellent wear resisting property and resistance to corrosion; 2. the method flow of the synthetic particle of Ti and Sb is simple, and cost is low, is easy to realize industrialization production; 3. Ti and Sb are strong graphite elements, have the pearlitic effect of refinement graphite, form the stable especially high-intensity compound that contains Ti and Sb, and disperse is dispersed in the matrix of Cast iron liner, strengthen wear resistance.4. breed further refinement metallographic structure by twice, strengthen mechanical property; 5. utilize the immediate quenching of depanning blank, make it change the lower bainite tissue into, make engine more advance one one and improve its wear resistance, adapt to the more severe environment work of Midwest sand and dust.
Embodiment
Example 1: at first Ti and Sb being processed into synthetic particle is that 2-3mm is standby; Then prepare burden in proportion melting, wherein C3.0% of alloy; Si2.1%; Mn0.8%; P0.1%; S0.02%; Cu0.8%; Cr0.25%; When reaching 1550 ℃, Fe92.38%, smelting temperature add in proportion synthetic particle, wherein Ti0.35%, Sb0.2%, and particle added afterpurification 6 minutes, then carried out breeding for twice, first nucleating agent was being bred in large bag, then was breeding in pouring ladle; Teeming temperature is 1350 ℃～1320 ℃; Pouring speed is 2kg/s; Cooling intensity is water-cooled 120 seconds; Put into solution during 600 ℃ of left and right after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.
Example 2: at first Ti and Sb being processed into synthetic particle is that 2-3mm is standby; Then prepare burden in proportion melting, wherein C3.3% of alloy; Si2.4%; Mn1.1%; P0.2%; S0.08%; Cu1.1%; Cr0.35%; When reaching 1550 ℃, Fe90.62%, smelting temperature add in proportion synthetic particle, wherein Ti0.45%, Sb0.4%, and particle added afterpurification 6 minutes, then carried out breeding for twice, first nucleating agent was being bred in large bag, then was breeding in pouring ladle; Teeming temperature is 1350 ℃～1320 ℃; Pouring speed is 2kg/s; Cooling intensity is water-cooled 120 seconds; Put into solution during 600 ℃ of left and right after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.
Example 3: at first Ti and Sb being processed into synthetic particle is that 2-3mm is standby; Then prepare burden in proportion melting, wherein C3.15% of alloy; Si2.25%; Mn0.95%:P0.15%; S0.05%; Cu0.95%; Cr0.3%; When reaching 1550 ℃, Fe91.5%, smelting temperature add in proportion synthetic particle, wherein Ti0.4%, Sb0.3%, and particle added afterpurification 6 minutes, then carried out breeding for twice, first nucleating agent was being bred in large bag, then was breeding in pouring ladle; Teeming temperature is 1350 ℃～1320 ℃; Pouring speed is 2kg/s; Cooling intensity is water-cooled 120 seconds; Put into solution during 600 ℃ of left and right after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.
Introduce the synthetic granuloplastic cylinder sleeve of Ti and Sb in the solution of HT300 cast iron quality, tensile strength is greater than 300MPa, and hardness is greater than 310HB.
Claims (1)
1. high abrasion desertification dirt engine jacket, contain following element: C3.0～3.3% in this cylinder sleeve; Si2.1～2.4%; Mn0.8～1.1%; P0.1～0.2%; S0.02～0.08%; Ti0.35～0.45%; Sb0.2～0.4%; Cu0.8～1.1%; Cr0.25～0.35%; Fe90.62～92.38%; It is characterized in that: at first Ti and Sb being processed into synthetic particle is that 2-3mm is standby; Then the alloy melting of preparing burden in proportion, add synthetic particle in proportion when smelting temperature reaches 1550 ℃, particle added afterpurification 6 minutes, then carries out breeding for twice, first nucleating agent bred in large bag, then breeding in pouring ladle; Teeming temperature is 1350 ℃～1320 ℃; Pouring speed is 2kg/s; Cooling intensity is water-cooled 120 seconds; Put into solution during 600 ℃ of left and right after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101424859A CN103388102A (en) | 2012-05-09 | 2012-05-09 | Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101424859A CN103388102A (en) | 2012-05-09 | 2012-05-09 | Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area |
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| Publication Number | Publication Date |
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| CN103388102A true CN103388102A (en) | 2013-11-13 |
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| CN2012101424859A Pending CN103388102A (en) | 2012-05-09 | 2012-05-09 | Casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365939A (en) * | 2017-08-28 | 2017-11-21 | 广东荻赛尔机械铸造股份有限公司 | Engine is cylinder iron and preparation method thereof |
-
2012
- 2012-05-09 CN CN2012101424859A patent/CN103388102A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365939A (en) * | 2017-08-28 | 2017-11-21 | 广东荻赛尔机械铸造股份有限公司 | Engine is cylinder iron and preparation method thereof |
| CN107365939B (en) * | 2017-08-28 | 2019-08-02 | 广东荻赛尔机械铸造股份有限公司 | Engine is cylinder iron and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131113 |