Production Technology of Centrifugal Casting High Speed Steel Composite Roll
2023-03-15
Centrifugal Casting high-speed steel roll technology refers to the use of centrifuge casting method to cast high-speed steel rolls, there are vertical centrifuge casting method, horizontal centrifuge casting method There are 3 kinds of casting method and inclined centrifuge casting method. The high-speed steel composite roll means that the roll adopts a three-layer structure, that is, the outer layer of high-speed steel, the transition layer of graphite steel, the core Ductile iron. During smelting, the outer high-speed steel is smelted in an intermediate frequency furnace, and high-quality alloy materials and steel materials are selected for smelting. Nb, W, and V irons are first crushed and then put into the furnace. point Two times of smelting, adding 95% in the first time, adding the rest material in the second time, and making fine adjustments. When tapping, a modifier is added to the bottom of the ladle to refine the matrix and carbides. The middle layer material and the core material are smelted in a power frequency furnace, especially when the core material ductile iron molten iron is released from the furnace, an appropriate amount of nodularizer and inoculant is added to the cell. The agent is spheroidized and inoculated to ensure the mechanical properties of the roll neck. When pouring, a larger gravity coefficient should be selected when pouring the outer high-speed steel molten steel. At the same time, the temperature of the roll mold should be as low as possible, and the pouring temperature of the molten steel should be as low as possible. Low. After the molten steel is solidified in the rotating roller mold, the middle layer of molten metal is poured. Stop the machine after the middle layer is solidified, and pour molten iron into the core. Available in pouring Protect the slag with glass. Centrifugal casting high-speed steel roll technology refers to the use of centrifuge casting method to cast high-speed steel rolls, there are vertical centrifuge casting method, horizontal centrifuge casting method There are 3 kinds of casting method and inclined centrifuge casting method. The high-speed steel composite roll means that the roll adopts a three-layer structure, that is, the outer layer of high-speed steel, the transition layer of graphite steel, the core Ductile iron. During smelting, the outer high-speed steel is smelted in an intermediate frequency furnace, and high-quality alloy materials and steel materials are selected for smelting. Nb, W, and V irons are first crushed and then put into the furnace. point Two times of smelting, adding 95% in the first time, adding the rest material in the second time, and making fine adjustments. When tapping, a modifier is added to the bottom of the ladle to refine the matrix and carbides. The middle layer material and the core material are smelted in a power frequency furnace, especially when the core material ductile iron molten iron is released from the furnace, an appropriate amount of nodularizer and inoculant is added to the cell. The agent is spheroidized and inoculated to ensure the mechanical properties of the roll neck. When pouring, a larger gravity coefficient should be selected when pouring the outer high-speed steel molten steel. At the same time, the temperature of the roll mold should be as low as possible, and the pouring temperature of the molten steel should be as low as possible. Low. After the molten steel is solidified in the rotating roller mold, the middle layer of molten metal is poured. Stop the machine after the middle layer is solidified, and pour molten iron into the core. Available in pouring Protect the slag with glass.
