Smelting method of steel for hypoxia axle
A technology for axle steel and smelting methods, applied to the improvement of process efficiency, furnace type, furnace, etc., can solve the problems of large fluctuations in the quality of axle steel, oxygen content and inclusion control levels that are difficult to achieve stably, and improve comprehensive performance Effect
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[0047] What the present embodiment produces is high-speed motor car axle steel, and the mass percent of its composition and the requirement of oxygen content are as follows:
[0048] C 0.20~0.30%; Si 0.15~0.40%; Mn 0.50~0.80%; P≤0.020%;
[0049] S≤0.015%; Cr 0.90~1.20%; Mo 0.20~0.30%; V ≤0.06%;
[0050] Al ≤0.050%; [O] ≤20×10 -6 . The rest is Fe and unavoidable impurities.
[0051] This embodiment is the following sequential steps:
[0052] 1 Electric furnace smelting
[0053](1) Electric furnace charging: firstly put 6 tons of high-quality steel scrap into the electric furnace, the scrap steel (weight) P≤0.025%, S≤0.030%, the surface of the scrap steel is dry, free of oil and impurities, and the overall size is ≤800mm×500mm. Then pour 54 tons of the pretreated molten iron into the electric furnace, put the pretreated molten iron into the furnace (weight) P 0.060%, S 0.040%, and the temperature of the molten iron is 1260°C.
[0054] (2) Oxygen blowing in the electric f...
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