Method for continuously reducing, rolling and compositing stainless steel/plain steel composite plate and device thereof

Abstract

The invention discloses a method for continuously reducing, rolling and compositing stainless steel / plain steel composite plate and a device thereof. The method comprises the following steps of: cleaning the surface of a stainless steel plate strip; heating and dephosphorizing a plain steel plate blank; reducing an oxidized iron sheet on the surface of the plain steel plate blank; heating the stainless steel plate strip; rolling and laminating; and cooling. The device used for the method comprises: a steel billet inlet guide roller, a steel billet inlet sealing guide mouth, a front-section heat-insulation reduction furnace, a steel billet running roller way, a sealing water tank, a steel wire brush, a stainless steel plate strip uncoiling machine, a stainless steel plate strip inlet sealing guide mouth, a stainless steel plate strip inlet guide roller, a middle-section reducing-atmosphere heating furnace, a heater, a heat-insulating layer, a stainless steel plate strip running roller way, a guide roller, a rolling mill inlet guide roller, a rolling mill inlet sealing guide and guard, a roughing mill, a protective gas inlet pipeline, a heat-insulating furnace between frames, a finishing mill and a protective gas water-cooling tank body. With the adoption of the method and the device, stainless steel composite plate blanks and plate strip materials can be continuously produced.

Description

technical field [0001] The invention relates to a metal composite material production method and a device thereof, in particular to a continuous reduction rolling composite method of a stainless steel / common steel composite plate and a device thereof. Background technique [0002] Stainless steel clad plates are usually made of stainless steel as the surface material, with ordinary steel (including carbon structural steel, alloy structural steel and other steel with low price) as the base material, and combined into a multi-layer material in various ways. Different composite plates have the advantages of anti-rust and corrosion resistance of stainless steel and high strength and low price of ordinary steel, and have incomparable advantages in terms of cost performance compared with pure stainless steel of the same specification. Therefore, stainless steel composite plates have been favored by people since their birth. highly valued. [0003] At present, the production of st...

AI Technical Summary

Problems solved by technology

[0003] At present, the production of stainless steel clad plates is still dominated by solid-solid phase compounding, and explosive welding and vacuum diffusion welding are the most mature solid-solid phase compounding technologies. Low, it is necessary to improve the interfacial bonding strength through the subsequent rolling process, which causes the problems of low yield and high production cost

In addition, these two methods are produced in a single-sheet manner, and continuous production cannot be realized. Therefore, the production efficiency is low, and the loss of cutting edges and tails is large, so the yield of finished products is also relatively low. These problems hinder the production of stainless steel. Popularization and Application of Composite Composite Panels

[0004] Patent document CN1126616C discloses a method for manufacturing bimetallic composite strips. This patent document describes a method for preparing bimetallic composite strips by using electric induction to heat two metal thin strips. The preparation method is relatively simple, but pre-applied It is very difficult to uniformly heat the two metal thin strips to the rolling composite temperature by electric induction. Even so, the composite material used in this patent document is only a metal strip. The surface area of ​​the metal strip is relatively large, and the process cost is relatively high. High, and the surface is easily oxidized

Patent document CN201385171Y discloses a solid-solid phase continuous brazing and rolling device for stainless steel clad plates. This patent document describes that the hot-rolled steel strip after pickling is used as raw material, and the rolling mill is placed in a sealed protective atmosphere device A method in which the cleaned coil is heated to the temperature required by the process in a protective atmosphere furnace and then rolled and compounded. Although the thickness of the raw material used in this method increases and the compounding efficiency is improved, the specific surface area is still too large. The surface is easy to oxidize. In addition, it is very difficult to protect the entire rolling mill with a protective atmosphere with a sealed structure.

The patent document CN201346897Y discloses a high-performance bimetallic stainless steel clad plate. The patent document describes the carbon steel plate as the substrate, the stainless steel cladding, and the method of continuous coating and heating with an interlayer binder to produce a thin plate. Standard composite board, the main problem of this method is that even if the curling force is very large, interlayer oxidation will occur when reheating, and adding solder between layers will increase the cost

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