Method of continuously casting nickel base corrosion-resistant alloy in composite alternating electromagnetic field

Abstract

The invention discloses a method of continuously casting a nickel base corrosion-resistant alloy in a composite alternating electromagnetic field. The method comprises the processing steps that (1) a high-frequency alternating electromagnetic field device is arranged near a crystallizer of a vertical continuous casting machine, a low-frequency electromagnetic stirrer is arranged below a vibrating system and is close to a second cold area spraying system, a dummy bar rises to the lower end part of the crystallizer, and condensation water of the crystallizer and the high-frequency alternating electromagnetic field device are started; (2) refined nickel base corrosion-resistant alloy liquid is poured into the crystallizer, the liquid level of molten metal is kept to be flush with the upper edge of a high-frequency alternating electromagnetic coil, the vibrating system is started, and the second cold area spraying system and the low-frequency electromagnetic stirrer are started simultaneously; (3) the vertical continuous casting machine is started, the dummy bar moves downwards, and a casting speed is kept at 0.4-1.5m / min; and (4) after a casting blank reaches the required size, the nickel base corrosion-resistant alloy casting blank is captured, and the casting of casting blanks of next batch begins. The surface quality and internal quality of the nickel base corrosion-resistant alloy continuous casting blank prepared by the method are improved greatly.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a method for continuously casting a nickel-based corrosion-resistant alloy under a compound AC electromagnetic field. Background technique [0002] Nickel-based corrosion-resistant alloys are an important corrosion-resistant material. Compared with general stainless steel, other corrosion-resistant metals and non-metallic materials, they have a variety of corrosion-resistant properties in various corrosive environments (including electrochemical corrosion and chemical corrosion). The ability to form corrosion damage (including general corrosion, localized corrosion and stress corrosion, etc.), and has good mechanical properties and processing properties, its comprehensive corrosion resistance is far better than stainless steel and other corrosion-resistant metal materials, especially suitable for Harsh medium environment under modern industrial technology. At...

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Problems solved by technology

Because the general particle-reinforced metal matrix composites have low density and low viscosity, they are easy to stir under the electromagnetic field, while nickel-based corrosion-resistant alloys have high density and high viscosity, so the relevant parameters of electromagnetic continuous casting will vary. big difference

2) Continuous casting of nickel-based corrosion-resistant alloys is not easy as described in the patent, and the composite material is electromagnetically stirred in the molten pool above the crystallizer

This is because nickel-based corrosion-resistant alloys have high requirements on oxygen content, and standing and stirring above the crystallizer for a long time will seriously affect the control of oxygen content

3) This patent is mainly to add non-metallic particles in the metal matrix, but the non-conductivity of the non-metallic particles added will weaken the effect of the electromagnetic field on the melt, weaken the Joule heat caused by the high-frequency electromagnetic field, and thus weaken the high-frequency Effect of Magnetic Field on Improving Surface Quality of Continuous Casting Slab

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