Steel plate for guide blades of large hydropower generating units and production method thereof
A technology for hydroelectric units and production methods, which is applied in the field of steel plates for guide vanes of large hydroelectric units, can solve the problems of long construction period and high cost, and achieve the effects of good strength and toughness matching, compact internal quality, and high purity
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Embodiment 1
[0029] The steel plate for guide vanes of large hydropower units in this embodiment is smelted from the following components by weight percentage: C: 0.18%, Si: 0.65%, Mn: 1.30%, P: 0.012%, S: 0.003%, Alt ( Total aluminum): 0.020%, Cu: 0.12%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 202 mm.
[0030] The steps of the production method of steel plate for guide vane of large hydroelectric unit of the present invention are as follows:
[0031] (1) Smelting: The molten steel is smelted in an electric furnace first, and the molten steel in the furnace is 100-110 tons, and then sent to the LF furnace for refining and adjusting the composition. Each element contains the following weight percentages: C: 0.18%, Si: 0.65%, Mn: 1.30% , P: 0.012%, S: 0.003%, Alt: 0.020%, Cu: 0.12%, when the temperature of molten steel reaches 1565°C, transfer to vacuum degassing furnace (VD furnace) for vacuum treatment; add Al wire 230m, CaSi block...
Embodiment 2
[0043] The steel plate for guide vanes of large hydropower units in this embodiment is smelted from the following components by weight percentage: C: 0.16%, Si: 0.60%, Mn: 1.25%, P: 0.010%, S: 0.003%, Alt ( Total aluminum): 0.028%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 226mm.
[0044] Large-scale hydroelectric unit guide vane of the present invention is as follows with the production method of rolling substituting forged steel plate with large thickness:
[0045] (1) Smelting: The molten steel is smelted in an electric furnace first, and the molten steel in the furnace is 100-110 tons, and then sent to the LF furnace for refining and adjusting the composition. Each element contains the following weight percentages: C: 0.16%, Si: 0.60%, Mn: 1.25% , P: 0.010%, S: 0.003%, Alt: 0.028%, when the temperature of molten steel reaches 1560 ℃, transfer to vacuum degassing furnace (VD furnace) for vacuum treatment; add 260m of ...
Embodiment 3
[0057] The steel plate for guide vanes of large hydropower units in this embodiment is smelted from the following components by weight percentage: C: 0.21%, Si: 0.80%, Mn: 1.10%, P: 0.014%, S: 0.003%, Alt ( Total aluminum): 0.050%, Cu: 0.15%, the rest is Fe and unavoidable impurities. The thickness of the steel plate in this embodiment is 216 mm.
[0058] Large-scale hydroelectric unit guide vane of the present invention is as follows with the production method of rolling substituting forged steel plate with large thickness:
[0059] (1) Smelting: The molten steel is smelted in an electric furnace first, and the molten steel in the furnace is 100-110 tons, and then sent to the LF furnace for refining and adjusting the composition. Each element contains the following weight percentages: C: 0.21%, Si: 0.80%, Mn: 1.10% , P: 0.014%, S: 0.003%, Alt: 0.050%, Cu: 0.15%, when the temperature of molten steel reaches 1580 ° C, transfer to vacuum degassing furnace (VD furnace) for vacuu...
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