Process for preparing austenitic nodular cast iron in controllable cooling way
A technology of controlled cooling and austenite, which is applied in the preparation of austenitic ductile iron, and the field of ausferitic ductile iron prepared by controlling the cooling process, which can solve the problems of long production cycle, environmental impact, large energy consumption, etc., and achieve excellent Performance, reduced energy consumption, and simple process
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Embodiment 1
[0024] The grade of the ausferitic ductile iron prepared in this example is: QTD 1200-3, and the corresponding isothermal temperature is 320°C. In this example, the process flow for preparing the ausferitic ductile iron by controlled cooling is as follows: the first step is to smelt qualified molten iron at a temperature of 1500 °C, after spheroidizing inoculation, the pouring temperature of the molten iron is 1375 °C, pouring Into the mold equipped with thermocouples, the temperature is detected by the thermocouples in real time, and when the temperature of the workpiece drops to 935°C, the box is opened quickly;
[0025] The second step is to open the furnace door and quickly push the workpiece into the furnace at the pre-set isothermal temperature (320°C±3°C in this embodiment) through the transmission raceway, and close the furnace door (from when the workpiece is boxed to entering the furnace) , completed within 10 to 20 seconds). Open the air stirrer at the top of the f...
Embodiment 2
[0029] The grade of the ausferitic ductile iron prepared in this example is: QTD 1050-6, and the corresponding isothermal temperature is 350°C. In this example, the process flow for preparing the ausferitic ductile iron by controlled cooling is as follows: the first step is to smelt qualified molten iron at a temperature of 1505°C, after spheroidizing inoculation, the pouring temperature of the molten iron is 1390°C, and pouring Into the mold equipped with thermocouples, the temperature is detected by the thermocouples in real time, and when the temperature of the workpiece drops to 950 ° C, the box is opened quickly;
[0030]The second step is to open the furnace door and quickly push the workpiece into the furnace at the pre-set isothermal temperature (350°C±3°C in this embodiment) through the transmission raceway, and close the furnace door (from the time when the workpiece is boxed to enter the furnace) , completed within 10 to 20 seconds). Open the air stirrer at the top...
Embodiment 3
[0034] The grade of the ausferitic ductile iron prepared in this example is: QTD 1400-1, and the corresponding isothermal temperature is 280°C. In this example, the process flow for preparing the ausferitic ductile iron by controlled cooling is as follows: the first step is to smelt qualified molten iron at a temperature of 1490°C, after spheroidizing and inoculating, the pouring temperature of the molten iron is 1365°C, and pouring Into the mold equipped with thermocouples, the temperature is detected by the thermocouples in real time, and when the temperature of the workpiece drops to 920°C, the box is opened quickly;
[0035] The second step is to open the furnace door and quickly push the workpiece into the furnace at the pre-set isothermal temperature (280°C±3°C in this embodiment) through the transmission raceway, and close the furnace door (from the time the workpiece is unboxed to entering the furnace). , completed within 10 to 20 seconds). Open the air stirrer at the...
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Abstract
Description
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Application Information
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