High-hardness and high-abrasion-resistance high tungsten ledeburite gear steel and preparation method thereof
A technology with high wear resistance and ledeburite, applied in the field of powder metallurgy, can solve problems such as low toughness, carbide segregation, fracture, etc., and achieve the effects of improving toughness and fatigue strength, increasing hardness, and reducing use costs
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[0020] The present invention will be further described below:
[0021] A kind of high hardness high wear resistance high tungsten ledeburite gear steel and preparation method thereof, is made up of the raw material of following mass percentage, C 1.8%; Si 0.5%; Mn 0.25%; S 0.015%; P 0.025%; Cr 2.5 %; Mo 1.25%; V 0.8%; Nb 0.16%; RE 0.05%; Ni 0.12%; W 0.30%; the rest is Fe and impurities.
[0022] A high hardness, high wear resistance high tungsten ledeburite gear steel and a preparation method thereof, comprising the following steps:
[0023] (1) Put steel scrap raw materials into an electric arc furnace for smelting at a melting temperature of 1300°C, add raw materials and deoxidizers during the smelting process, and then carry out secondary refining through ladle refining furnace and vacuum degassing furnace;
[0024] (2) Preheat the steel ingot mold to 320°C, and the casting temperature is 1400°C. After heat preservation, the mold is demoulded and heat preservation is slowl...
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