Nodular cast iron cylinder sleeve and manufacturing method thereof
A ductile iron and cylinder liner technology, applied in the direction of cylinders, engine components, mechanical equipment, etc., can solve the problems of complex preparation process, inability to meet high-performance, low-emission, long-life and high-power internal combustion engines, etc. The effect of abrasive performance, high tensile strength and fatigue strength
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Embodiment 1
[0022] Ductile iron cylinder liner, its chemical composition mass percentage is: carbon 3.63%, silicon 2.17%, manganese 0.72%, phosphorus ≤ 0.08%, sulfur ≤ 0.03%, chromium ≤ 0.08%, molybdenum 0.31%, nickel 1.08%, copper 0.17% , the balance being Fe.
[0023] The preparation method of the ductile iron cylinder liner includes a batching process, a smelting process, a spheroidizing inoculation process, and a pouring process:
[0024] (1) The batching process: the charge is 3500 kilograms of pig iron, 1500 kilograms of steel scrap; 53 kilograms of ferrosilicon, 28 kilograms of ferromanganese, 31 kilograms of ferromolybdenum, 54 kilograms of nickel, and 9 kilograms of copper.
[0025] (2) In the smelting process: weigh according to the ingredient list, adopt a step-by-step feeding method, first add pig iron, then add scrap steel, feed while melting, and finally add alloy, when the temperature of molten iron reaches 1435 ° C, take a chemical analysis sample, The molten iron is smel...
Embodiment 2
[0031] Ductile iron cylinder liner, its chemical composition mass percentage is: carbon 3.73%, silicon 2.28%, manganese 0.77%, phosphorus ≤ 0.08%, sulfur ≤ 0.03%, chromium ≤ 0.08%, molybdenum 0.40%, nickel 0.97%, copper 0.14% , the balance being Fe.
[0032] The preparation method of the ductile iron cylinder liner includes a batching process, a smelting process, a spheroidizing inoculation process, and a pouring process:
[0033] (1) The batching process: the charge is 4000 kilograms of pig iron, 1000 kilograms of steel scrap; 60 kilograms of ferrosilicon, 41 kilograms of ferromanganese, 40 kilograms of ferromolybdenum, 49 kilograms of nickel, and 7 kilograms of copper.
[0034] (2) In the smelting process: weigh according to the ingredient list, adopt a step-by-step feeding method, add pig iron first, then add scrap steel, feed while melting, and finally add alloy, when the temperature of molten iron reaches 1407 ° C, take a chemical analysis sample, The molten iron is smel...
Embodiment 3
[0040] Ductile iron cylinder liner, its chemical composition mass percentage is: carbon 3.87%, silicon 2.03%, manganese 0.88%, phosphorus ≤ 0.08%, sulfur ≤ 0.03%, chromium ≤ 0.08%, molybdenum 0.47%, nickel 0.93%, copper 0.12% , the balance being Fe.
[0041] The preparation method of the ductile iron cylinder liner includes a batching process, a smelting process, a spheroidizing inoculation process, and a pouring process:
[0042](1) The batching process: the charge is 3750 kilograms of pig iron, 1250 kilograms of steel scrap; 37 kilograms of ferrosilicon, 44 kilograms of ferromanganese, 48 kilograms of ferromolybdenum, 46 kilograms of nickel, and 6 kilograms of copper.
[0043] (2) In the smelting process: weigh according to the batching list, adopt a step-by-step feeding method, add pig iron first, then add scrap steel, feed while melting, and finally add alloy, when the temperature of molten iron reaches 1359 ° C, take a chemical analysis sample, The molten iron is smelted...
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