Cylinder Liner/Cylinder Sleeves : Casting of these components is done in grey cast iron of G-4000 Grade. In such a way so as to achieve paralytic structure free from ferrite and graphitic (max up to 2-3%). They are casted by centrifugal casting process so as to achieve compact structure and high strength as well as desired wear resistance, hardness and tensile strength. Each and every batch of casting is tested at the time of pouring as well as afterward completely in the in-house laboratory to maintain chemical composition, mechanical properties and metallographic of the end products so as to meet the
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exact requirement of metallurgical norms. These casting of Cylinder Liners are further machined in our well equipped machinery plant having latest special purpose machines, CNC turning center and hydraulically operated honing machines to achieve plateau honing configuration. |
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The cylinder liner forms the cylindrical space in which the piston reciprocates. The reasons for manufacturing the liner separately from the cylinder block (jacket) in which it is located are as follows:- |
The liner can be manufactured using a superior material to the cylinder block. While the cylinder block is made from a grey cast iron, the Cylinder Liner is manufactured from a cast iron alloyed with chromium, vanadium and molybdenum. Cast iron contains graphite, a lubricant. The alloying elements help resist |
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corrosion and improve the wear resistance at high temperatures. The Cylinder Liner will wear with use, and therefore may have to be replaced. The Cylinder jacket lasts the life of the engine. |
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At working temperature, the liner is a lot hotter than the jacket. The liner will expand more and is free to expand diametrically and lengthwise. If they were cast as one piece, then unacceptable thermal stresses would be set up, causing fracture of the material. Less risk of defects. The more complex the casting, the more difficult to produce a homogenous casting with low residual stresses.
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The Liner will get tend to get very hot during engine operation as the heat energy from the burning fuel is transferred to the cylinder wall. So that the temperature can be kept within acceptable limits the liner is cooled. |
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Put Product Range of Cylinder Liners and in proper way,
Chemical composition in heavy liners:
• Carbon : 2.80 - 3.50%
• Silicon : 1.70 - 2.30 %
• Manganese : 0.60 - 0.90 %
• Chromium : 0.20 - 0.50 %
• Copper : 0.20 - 0.50 %
• Sulphur : 0.15 Max. %
• Phosphorus : 0.15 Max. %
• Molybdenum : 0.20 - 0.50 %
• Nickel : 0.08 - 0.25 % |
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