Manufacturing process and equipment for nickel-chromium-molybdenum alloy cast iron composite roller in forged steel roller neck

Abstract

The invention discloses a manufacturing process and equipment for a nickel-chromium-molybdenum alloy cast iron composite roller in a forged steel roller neck. The nickel-chromium-molybdenum alloy cast iron composite roller is composed of, by mass, 3.3-3.8% of C, 0.6-1.2% of Si, 0.4-1.2% of Mn, 0.6-1.2% of Cr, 0.3-1.0% of Mo, 2.0-3.0% of Ni, 0.6-1.1% of Cu, 0-0.05% of P, 0-0.03% of S, 0.04-0.06% of Mg, 1.5-2.5% of Ba, 1-2% of Ca, 1.0-2.0% of RE and the balance Fe. Rare earth globularization and Ba, Ca and silicon iron composite inoculation are adopted, and the mechanical properties of the roller are improved; the strength of the roller is improved by the adoption of the forged steel roller neck; in-mold integral heating and casting are conducted on a core rod through a sensing heater, forming is conducted through a combined water-cooling crystallizer, a lifting device lifts a heater upwards at a certain speed to form local directional freezing, the interface of a composite layer can be controlled dynamically, the process is simple, the efficiency is high, the electric losses are small, the cost is low, composition segregation of the composite layer is avoided, and the service life of the roller is long.

Description

technical field [0001] The invention belongs to the technical field of metal pressure processing, and in particular relates to a process and equipment for a nickel-chromium-molybdenum alloy cast iron composite roll in a forged steel roll neck, which is suitable for manufacturing composite rolls in the steel rolling industry. Background technique [0002] The roll is known as the "mother of steel". It is a tool for plastically deforming metal materials in the rolling production of steel, aluminum, copper and other metals. Rolling is an indispensable key component and the most important bulk consumption component, and its consumption cost is about 5% to 15% of the steel rolling production cost. If factors such as production downtime, reduced production and increased equipment maintenance due to roll consumption are considered, the proportion of production costs will be even higher. [0003] Rolling mill is an important equipment in metal pressure processing and production, an...

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Problems solved by technology

[0024] The purpose of the present invention is to address the deficiencies of the existing technology, and propose a nickel-chromium-molybdenum alloy cast iron composite roll process and equipment in forged steel roll necks with simple production process, low equipment investment, high production efficiency, low cost and good performance , to solve the shortcomings of centrifugal casting method, which is prone to component segregation, CPC method, ESR method, complex production process, large power consumption, high cost, and low efficiency. Forged steel is used as the roll neck to solve the problem of roll breakage

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