A kind of 6%mo super austenitic stainless steel and preparation method thereof
An austenitic stainless steel, super technology, applied in the field of iron and steel metallurgy, can solve the problems of high difficulty, low component hit rate, high inclusion content, etc., to achieve the effect of improving processability, high component hit rate, and high purity
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[0026] Concretely, the preparation method of 6%Mo super austenitic stainless steel of the present invention comprises the following steps:
[0027] (1) carry out batching with this steel type return material and alloy raw material, wherein, the ratio of this steel type return material is 20%-30%;
[0028] (2) Put the ingredients into the electric furnace, wait until all the ingredients in the furnace are melted, add ferrosilicon for reduction, and carry out slag removal after tapping, and the slag removal temperature is 1450°C-1650°C;
[0029] (3) The molten steel is transferred to the AOD furnace for smelting, and nitrogen is blown throughout the smelting process 2 , and then blow O 2 Add metal raw materials while decarburizing, and stop blowing O after the carbon reaches the target content 2 , after adjusting the temperature to 1600°C -1700°C, add ferrosilicon, steel-aluminum shot and metal manganese in sequence, remove slag and tap;
[0030] (4) The molten steel enters t...
Embodiment 1
[0072] Using 25% recycled materials + alloy mixed ingredients, the content of all raw materials "five harmful elements" (Pb, Sn, As, Sb, Bi) shall not exceed 0.002%, the content of P shall not exceed 0.01%, and the content of Co shall not exceed 0.1% . After adding the return material, ferronickel, metal chromium and ferrochromium nitride to the electric furnace, the electric furnace starts to energize, and after the raw materials are completely melted, ferrosilicon is added for reduction, and the reduction time is 5 minutes. The tapping temperature of the electric furnace is 1620°C, the slag removal temperature is 1550°C, and the thickness of the slag layer in the cladding after slag removal is 15mm.
[0073] Enter AOD smelting, blow nitrogen throughout the process, and start blowing O when the temperature is adjusted to 1510°C 2 Decarburization (flow rate is 35m 3 / h / ton of steel), while adding ferromolybdenum alloy, metal copper and pure nickel, when the carbon content re...
Embodiment 2
[0078] Using 20% recycled materials + alloy mixed ingredients, the content of all raw materials "five harmful elements" (Pb, Sn, As, Sb, Bi) shall not exceed 0.002%, the content of P shall not exceed 0.01%, and the content of Co shall not exceed 0.1% . After the electric furnace is filled with return materials, ferronickel, metal chromium, and ferrochrome nitride, the electric furnace starts to be energized, and after the raw materials are completely melted, ferrosilicon is added for reduction, and the reduction time is 4 minutes. The tapping temperature of the electric furnace is 1630°C, the slag removal temperature is 1520°C, and the thickness of the inner slag layer after slag removal is 20mm.
[0079] Enter AOD smelting, blow nitrogen throughout the process, and start blowing O when the temperature is adjusted to 1520°C 2 Decarbonization (flow rate is 30m 3 / h / ton of steel), while adding ferromolybdenum alloy, metal copper and pure nickel, when the carbon content reach...
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