CN102337451A

CN102337451A - Casting technology for abrasion resisting cylinder liner

Info

Publication number: CN102337451A
Application number: CN2010102379071A
Authority: CN
Inventors: 李美玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-25
Filing date: 2010-07-25
Publication date: 2012-02-01

Abstract

The invention provides a casting technology for an abrasion resisting cylinder liner. With the cylinder liner, the performance of an engine can be improved, the service life of the cylinder liner can be prolonged, energy consumption can be reduced, engine tail gas discharging quality can be improved, and natural environment can be protected. The cylinder liner contains the following alloy elements: 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.

Description

The cylinder sleeve of resistance to wearing casting technique

Technical field

The present invention relates to the cylinder sleeve casting technique, be specifically related to a kind of cylinder sleeve casting technique of resistance to wearing

Background technology

China central and west regions, sand and dust are bigger, and hard particulate very easily sucks engine cylinder, produces abrasive wear, has a strong impact on the work-ing life of mover.

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 the combustion processes is up to 2200～2400 ℃; The highest transient pressure is up to 12～14MPa; The inwall of cylinder sleeve directly receives high temperature, high pressure, molten sticking effect; If cylinder resorb particulate sand and dust make cylinder inner wall under the extreme working conditions that worsens, increase abrasive wear again, further shortened the work-ing life of mover.

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 serious day by day in recent years.Therefore, it is very important developing the type cylinder sleeve of resistance to wearing.

Summary of the invention

The present invention provides a kind of cylinder sleeve casting technique of resistance to wearing, and adopts this kind cylinder sleeve to improve the mover use properties, increases the service life, and reduces energy consumption, improves the engine exhaust emission quality, the conservation of nature environment.

Technical solution of the present invention is to contain following alloying element: C 3.0～3.3% in this cylinder sleeve; Si 2.1～2.4%; Mn 0.8～1.1%; P 0.1～0.2%; S 0.02～0.08%; Ti 0.35～0.45%; Sb 0.2～0.4%; Cu 0.8～1.1%; Cr 0.25～0.35%; Fe 90.62～92.38%.

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 subsequent use; The alloy melting of preparing burden in proportion then adds synthetic particle in proportion when smelting temperature reaches 1550 ℃, particle adds after 6 minutes, carries out then breeding for twice, earlier nucleating agent is bred in big bag, in pouring ladle, breeds again; 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 sides 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. in cast iron solution, add the synthetic particle of Ti and Sb, particle dispersion is even, the dense structure of cylinder sleeve, and Heat stability is good has good oil storage capacity and excellent abrasive ability and resistance to corrosion; 2. the synthetic particulate method flow 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, enhance mechanical properties through twice; 5. utilize the immediate quenching of depanning blank, make it change the lower bainite tissue into, make mover 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 are processed into that to synthesize particle be that 2-3mm is subsequent use; Prepare burden in proportion melting, wherein C3.0% of alloy then; Si 2.1%; Mn 0.8%; P 0.1%; S 0.02%; Cu 0.8%; Cr 0.25%; Fe 92.38%, adds synthetic particle when smelting temperature reaches 1550 ℃ in proportion, wherein Ti 0.35%, Sb 0.2%, and particle adds after 6 minutes, carries out then breeding for twice, earlier nucleating agent is bred in big bag, in pouring ladle, breeds again; 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 sides after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.

Example 2: at first Ti and Sb are processed into that to synthesize particle be that 2-3mm is subsequent use; Prepare burden in proportion melting, wherein C3.3% of alloy then; Si 2.4%; Mn 1.1%; P 0.2%; S 0.08%; Cu 1.1%; Cr 0.35%; Fe 90.62%, adds synthetic particle when smelting temperature reaches 1550 ℃ in proportion, wherein Ti 0.45%, Sb 0.4%, and particle adds after 6 minutes, carries out then breeding for twice, earlier nucleating agent is bred in big bag, in pouring ladle, breeds again; 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 sides after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.

Example 3: at first Ti and Sb are processed into that to synthesize particle be that 2-3mm is subsequent use; Prepare burden in proportion melting, wherein C3.15% of alloy then; Si 2.25%; Mn 0.95%; P 0.15%; S 0.05%; Cu 0.95%; Cr 0.3%; Fe 91.5%, adds synthetic particle when smelting temperature reaches 1550 ℃ in proportion, wherein Ti 0.4%, Sb 0.3%, and particle adds after 6 minutes, carries out then breeding for twice, earlier nucleating agent is bred in big bag, in pouring ladle, breeds again; 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 sides after the blank depanning and quench, make the metallographic structure of cylinder sleeve change lower bainite into.

In the solution of HT300 cast iron quality, introduce the synthetic granuloplastic cylinder sleeve of Ti and Sb, tensile strength is greater than 300MPa, and hardness is greater than HB 310.

Claims

1. the present invention provides a kind of cylinder sleeve casting technique of resistance to wearing, and it is characterized in that: adopt this kind cylinder sleeve to improve the mover use properties, increase the service life, reduce energy consumption, improve the engine exhaust emission quality, the conservation of nature environment; Contain following alloying element: C 3.0～3.3% in this cylinder sleeve; Si 2.1～2.4%; Mn 0.8～1.1%; P 0.1～0.2%; S0.02～0.08%; Ti 0.35～0.45%; Sb 0.2～0.4%; Cu 0.8～1.1%; Cr 0.25～0.35%; Fe90.62～92.38%.