Nitralloy cast iron air cylinder sleeve and preparing method thereof
A technology of nitrided alloy and cylinder liner, applied in the field of cylinder liner, can solve the problems of large dimensional change of cylinder liner, low mechanical performance, poor wear resistance and wear reduction, and achieves good cutting performance, dimensional stability and strength performance. high effect
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Embodiment 1
[0013] According to the weight percentage of each component, it is C3.36%, Si2.35%, P0.1%, S0.076%, Mn0.75%, Cu0.425%, Ti0.036%, V0.016%, N0. 0096%, the balance is to prepare raw materials for iron. The molten iron is smelted with an intermediate frequency induction coreless electric furnace. The temperature of the molten iron is 1502 ° C. Before the molten iron is released, 0.6% of the weight of the molten iron is added to the silicon barium inoculant for inoculation; The strontium inoculant is used for secondary inoculation, and the cylinder liner is prepared by the metal mold wet paint centrifugal casting process. The cylinder liner prepared by the metal type wet paint centrifugal casting process is naturally cooled to room temperature after being released from the mold, and then put into the casting frame.
[0014] The tensile strength of the cylinder liner prepared in the present embodiment is 325Mpa, and the modulus of elasticity is 118GPa; the metallographic diagram of...
Embodiment 2
[0016] According to the weight percentage of each component, it is C3.0%, Si2.2%, P0.4%, S0.065%, Mn0.5%, Cu0.2%, Ti0.032%, V0.012%, N0. 006%, and the balance is to prepare raw materials for iron. Melt iron is obtained by smelting with an intermediate frequency induction coreless electric furnace. The temperature of the molten iron is 1480 ° C. Before the molten iron is released, 0.55% of the weight of the molten iron is added to the silicon-barium-calcium inoculant for inoculation; The silicon strontium inoculant is used for secondary inoculation, and the cylinder liner is prepared by centrifugal casting process of metal mold wet paint. The cylinder liner prepared by the metal type wet paint centrifugal casting process is naturally cooled to room temperature after being released from the mold, and then put into the casting frame.
[0017] The cylinder liner prepared in this example has a tensile strength of 338Mpa and a modulus of elasticity of 112GPa.
Embodiment 3
[0019] According to the weight percentage of each component, it is C3.6%, Si2.8%, P0.3%, S0.11%, Mn1.0%, Cu0.5%, Ti0.05%, V0.03%, N0. 0.15%, and the balance is to prepare raw materials for iron. The molten iron is smelted with an intermediate frequency induction coreless electric furnace. The temperature of the molten iron is 1520°C. Before the molten iron is released, 0.65% of the weight of the molten iron is added with a silicon strontium inoculant for inoculation; The strontium inoculant is used for secondary inoculation, and the cylinder liner is prepared by the metal mold wet paint centrifugal casting process. The cylinder liner prepared by the metal type wet paint centrifugal casting process is naturally cooled to room temperature after being released from the mold, and then put into the casting frame.
[0020] The cylinder liner prepared in this example has a tensile strength of 335Mpa and a modulus of elasticity of 116GPa.
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