Production process of niobium-molybdenum chilled alloy composite roller
A production process and composite roll technology, applied in the field of composite rolls, can solve the problems of composite roll wear resistance, poor hardness, unsatisfactory use effect, large hardness drop, etc., to improve hardenability, increase hardness, and reduce hardness drop Effect
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Embodiment 1
[0071] The production process of the niobium-molybdenum chilled carbide composite roll of the present embodiment comprises the following steps:
[0072] Step 1, prepare working layer raw materials:
[0073] Weigh the following raw materials by weight: C 3.0%, Si 0.8%, Mn 0.5%, Cr 1.0-1.2%, Nb 0.5%, modified Mo 0.6%, Ni 3.0%, modified carbon nanotubes 0.2%, The remainder is Fe;
[0074] Step 2, prepare the raw materials for the core layer:
[0075] C 4.1%, Si 0.5%, Mn 0.15%, P 0.03%, S 0.02%, the balance is Fe;
[0076] Step 3, using a 1.5-ton intermediate frequency furnace to smelt the raw material for the working layer to prepare molten iron for the working layer, and a 3-ton intermediate frequency furnace to smelt the raw material for the core layer to prepare the core roll neck molten iron;
[0077] Step 4: Centrifugally pour molten iron in the working layer at 1350°C, and after the pouring is completed, a working layer is formed;
[0078] In step 5, the heat treatment ...
Embodiment 2
[0098] The production process of the niobium-molybdenum chilled carbide composite roll of the present embodiment comprises the following steps:
[0099] Step 1, prepare working layer raw materials:
[0100] Weigh the following raw materials by weight: C 3.2%, Si 1.0%, Mn 0.6%, Cr 1.2%, Nb 0.6%, modified Mo 0.7%, Ni 3.2%, modified carbon nanotubes 0.7%, the balance is Fe;
[0101] Step 2, prepare the raw materials for the core layer:
[0102] C 4.3%, Si 1.4%, Mn 0.25%, P 0.1%, S 0.04%, the balance is Fe;
[0103] Step 3, using a 1.5-ton intermediate frequency furnace to smelt the raw material for the working layer to prepare molten iron for the working layer, and a 3-ton intermediate frequency furnace to smelt the raw material for the core layer to prepare the core roll neck molten iron;
[0104] Step 4: Centrifugally pour molten iron in the working layer at 1370°C, and after the pouring is completed, a working layer is formed;
[0105] In step 5, the heat treatment process...
Embodiment 3
[0125] The production process of the niobium-molybdenum chilled carbide composite roll of the present embodiment comprises the following steps:
[0126] Step 1, prepare working layer raw materials:
[0127] Weigh the following raw materials by weight: C 3.1%, Si 0.9%, Mn 0.55%, Cr 1.1%, Nb 0.55%, modified Mo 0.65%, Ni 3.1%, modified carbon nanotubes 0.45%, the remainder is Fe;
[0128] Step 2, prepare the raw materials for the core layer:
[0129] C 4.2%, Si 0.9%, Mn 2.0%, P 0.06%, S 0.03%, the balance is Fe;
[0130] Step 3, using a 1.5-ton intermediate frequency furnace to smelt the raw material for the working layer to prepare molten iron for the working layer, and a 3-ton intermediate frequency furnace to smelt the raw material for the core layer to prepare the core roll neck molten iron;
[0131] Step 4: Centrifugally pour the molten iron in the working layer at 1360°C. After the casting is completed, the working layer is formed;
[0132] In step 5, the heat treatment...
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