Corrosion-resistant alloy cast iron material for diesel engine cylinder and preparing method thereof
A corrosion-resistant alloy, diesel engine technology, applied in the field of cast iron materials, can solve the problems of inability to meet market demand, poor corrosion resistance, etc., and achieve the effect of improving heat resistance, excellent corrosion resistance, and good toughness
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[0015] A kind of corrosion-resistant alloy cast iron material for diesel engine cylinder block, its mass percentage composition is: C2.8-3.2, Si2.2-2.6, Ni4.4-4.8, Cr1.9-2.3, Cu3.5-4.0, Mn0 .2-0.4, In0.3-0.6, Ge0.2-0.4, La0.05-0.1, Pm0.04-0.08, Gd0.03-0.06, P0.04-0.07, S0.02-0.04, the balance is Fe.
[0016] A method for preparing a corrosion-resistant alloy cast iron material for a diesel engine cylinder block, comprising the following steps:
[0017] (1) Use medium frequency induction furnace for smelting, firstly add steel scrap, pig iron, returned charge and ferrosilicon to the bottom of the furnace, add ferronickel, ferrochrome and ferromanganese after the furnace charge is melted, add graphite electrode powder when the temperature of molten iron reaches 1510°C Add carbon, and then add other iron alloys to adjust the chemical composition of the molten iron. The alloy element Cu is added in the form of electrolytic copper 4 minutes before the furnace is released. When the...
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