MnCr carburized gear steel and its production method
A gear steel and carburizing technology, applied in the field of alloy structural steel, can solve the problems of increasing the production cost of steel, and achieve the effects of improving production efficiency, improving purity and good comprehensive performance.
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[0033] A MnCr carburized gear steel. UHP ultra-high power electric furnace, LF refining, VD vacuum degassing process are used for smelting, continuous casting casting billets, and rolling lumber processes to produce steel products. Embodiment 1-2 specifically illustrates how the present invention is implemented with the production process of Φ50mm steel. Embodiments 3-4 specifically illustrate how the present invention is implemented with the production process of Φ80mm steel.
[0034] The composition of steel is by mass percentage:
[0035] C: 0.25-0.30%, Si: ≤0.12%, Mn: 0.60-0.80%, Cr: 0.80-1.10%, P: ≤0.035%, S: 0.020-0.050%, Al: 0.020-0.055, [O]≤ 20ppm, the rest is Fe and unavoidable impurities.
[0036] The production process is as follows:
[0037] (1) Smelting: Electric furnace smelting is used, and the whole process of electric furnace smelting is used to create foam slag. The end point [C]=0.15-0.20%, [P]≤0.015%, [Si]=0.03-0.04%, and the content of residual element...
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