A manufacturing process and equipment of nickel-chromium-molybdenum alloy cast iron composite roll in improved forged steel roll neck

Abstract

The invention discloses a process and equipment for an improved nickel-chromium-molybdenum alloy cast iron composite roll in a forged steel roll neck. The material mass percentage: C: 3.3-3.8%, Si: 0.6-1.2%, Mn: 0.4-1.2%, Cr : 0.6~1.2%, Mo: 0.3~1.0%, Ni: 2.0~3.0%, Cu: 0.6~1.1%, P: ≤0.05%, S: ≤0.03%, Mg: 0.04~0.06%, Nb: 0.1~0.2%, Ti: 0.1~0.25%, V: 0.2~0.5%, Ba: 1.5~2.5%, Ca: 1~2%, RE1.0~2.0%, the balance is Fe; using rare earth spheroidization and Composite inoculation of Ba, Ca and ferrosilicon, adding Nb, Ti and V to improve the mechanical properties of the roll, using forged steel roll neck to improve the strength of the roll, using induction heater to heat and melt the mandrel as a whole in the mold, combined type The water-cooled crystallizer is formed, and the lifting device lifts the heater upward at a certain speed to form a directional solidification of the area, which can dynamically control the interface of the composite layer, with simple process, high efficiency, low power consumption, low cost, no component segregation in the composite layer, and long service life of the roll. .

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 an improved 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 prod...

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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 process for improving nickel-chromium-molybdenum alloy cast iron composite roll technology in forged steel roll necks with simple production process, low equipment investment, high production efficiency, low cost and good performance. and equipment to solve the shortcomings of centrifugal casting method that is prone to component segregation, CPC method and ESR method with 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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