Molybdenum alloy steel plate for pressure container and production method thereof
A technology of pressure vessel and alloy steel plate, applied in the field of iron and steel metallurgy, can solve the problems of increasing production cost, alloy cost, increase production cost, etc., and achieve the effects of reducing smelting cost, easy production scheduling, and less addition amount
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Embodiment 1
[0017] The thickness of the molybdenum alloy steel plate for the pressure vessel in this embodiment is 80 mm, and it is composed of the following components in weight percentage: C0.22%, Si 0.35%, Mn 0.70%, P 0.006%, S 0.005%, Mo 0.41%, Cr 0.30%, Ni 0.30%, Cu0.10%, V 0.050%, Nb 0.040%, Ti 0.050%, the balance is Fe and unavoidable impurities.
[0018] The steps of the production method of the molybdenum alloy steel plate for the pressure vessel of the present embodiment are as follows:
[0019] (1) Ingot smelting and ingot casting process: Converter or electric furnace is used for initial smelting, and then refined in LF furnace, VD vacuum treatment, transported to the die casting line for casting to obtain steel ingots.
[0020] (2) Rolling process: heat the soaking furnace to 1200°C, and roll after heating for 28 hours. The starting temperature of rolling is 920°C, the reduction rate of each pass is 12%, and the steel plate is air-cooled after complete rolling.
[0021] (3)...
Embodiment 2
[0023] The thickness of the molybdenum alloy steel plate for the pressure vessel in this embodiment is 100 mm, and it is composed of the following components in weight percentage: C0.23%, Si 0.38%, Mn 0.75%, P 0.005%, S 0.005%, Mo 0.45%, Cr 0.32%, Ni 0.33%, Cu0.15%, V 0.045%, Nb 0.038%, Ti 0.048%, the balance is Fe and unavoidable impurities.
[0024] The steps of the production method of the molybdenum alloy steel plate for the pressure vessel of the present embodiment are as follows:
[0025] (1) Ingot smelting and ingot casting process: Converter or electric furnace is used for initial smelting, and then refined in LF furnace, VD vacuum treatment, transported to the die casting line for casting to obtain steel ingots.
[0026] (2) Rolling process: heat the soaking furnace to 1240°C, and roll after heating for 30 hours. The rolling start temperature is 940°C, the reduction rate of each pass is 11%, and the steel plate is air-cooled after complete rolling.
[0027] (3) Heat...
Embodiment 3
[0029] The thickness of the molybdenum alloy steel plate for the pressure vessel in this embodiment is 132 mm, and it is composed of the following components by weight percentage: C0.24%, Si 0.40%, Mn 0.85%, P 0.004%, S 0.004%, Mo 0.52%, Cr 0.33%, Ni 0.35%, Cu0.18%, V 0.040%, Nb 0.035%, Ti 0.045%, and the balance is Fe and unavoidable impurities.
[0030] The steps of the production method of the molybdenum alloy steel plate for the pressure vessel of the present embodiment are as follows:
[0031] (1) Ingot smelting and ingot casting process: Converter or electric furnace is used for initial smelting, and then refined in LF furnace, VD vacuum treatment, transported to the die casting line for casting to obtain steel ingots.
[0032] (2) Rolling process: heat the soaking furnace to 1280°C, and roll after heating for 32 hours. The rolling start temperature is 1100°C, the reduction rate of each pass is 10%, and the steel plate is air-cooled after complete rolling.
[0033] (3)...
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