Composite dummy bar for stainless steel coated carbon steel liquid-solid composite continuous casting and method

Abstract

The invention discloses a composite dummy bar for stainless steel coated carbon steel liquid-solid composite continuous casting and a method, and belongs to the technical field of composite continuous casting. The composite dummy bar for liquid-solid composite continuous casting of the 304 stainless steel coated Q235 carbon steel composite plate blank is composed of a transition connecting rod and a traction rod which are resistant to high temperature and corrosion of 304 stainless steel liquid and low in heat conductivity, the composite dummy bar of a special structure is used for effectively controlling fusing or surface oxidation of a Q235 carbon steel core plate before liquid-solid composite continuous casting of the 304 stainless steel coated Q235 carbon steel composite plate blank, and the continuous casting stability and the compounding quality of the 304 stainless steel and the Q235 carbon steel are ensured. The composite dummy bar for stainless steel coated carbon steel liquid-solid composite continuous casting has the advantages that the device is simple in structure, convenient to mount and reusable, widens the liquid-solid composite continuous casting process window of the 304 stainless steel coated Q235 carbon steel composite slab, and is beneficial to improving the surface and interface quality of the 304 stainless steel coated Q235 carbon steel composite slab.

Description

technical field [0001] The invention belongs to the technical field of composite continuous casting, and in particular relates to a composite dummy bar and method for stainless steel-coated carbon steel liquid-solid composite continuous casting, which are applied to stainless steel-coated carbon steel composite slab continuous casting. Background technique [0002] 304 stainless steel clad Q235 carbon steel composite plate is a metal layered composite material composed of Q235 carbon steel core plate and 304 stainless steel cladding layer through a certain preparation method. It has both corrosion resistance, heat resistance, wear resistance and It is beautiful and has the advantages of high strength, toughness, impact resistance and low cost of Q235 carbon steel. It is widely used in the fields of nuclear industry, shipbuilding, petrochemical, armor and seawater desalination, and has a large market demand. [0003] At present, the preparation methods of 304 stainless steel ...

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Problems solved by technology

[0006] The present invention is aimed at the current 304 stainless steel clad Q235 carbon steel composite slab liquid-solid composite continuous casting when the temperature of the Q235 carbon steel core plate is difficult to be reasonably controlled, resulting in liquid- Before solid cladding continuous casting, the Q235 carbon steel core plate is easy to fuse or the stability of liquid-solid cladding continuous casting is low, and the surface and interface quality are poor. It is proposed to use a composite dummy rod with a special structure to effectively prevent liquid-solid cladding Fuse or surface oxidation of Q235 carbon steel core plate before continuous casting, develop a composite dummy bar for liquid-solid composite continuous casting of stainless steel clad carbon steel composite slab, and develop a stainless steel based on this The liquid-solid composite continuous casting method of coated carbon steel composite slab ensures the stability of liquid-solid composite continuous casting of 304 stainless steel coated Q235 carbon steel composite slab, and the surface and surface of 304 stainless steel coated Q235 carbon steel composite slab interface quality

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