Method for producing stainless steel-carbon steel extremely-thick heterogeneous composite plate

Abstract

The invention provides a method for producing a stainless steel-carbon steel extra-thick heterogeneous composite plate. The clad stainless steel plate I is put into the embedding groove of the base carbon steel plate I, and the side of the clad stainless steel plate II coated with the release agent is placed On the top of the clad stainless steel plate I, and then stack the base carbon steel plate II on the top of the clad stainless steel plate II, then send it into a vacuum chamber to be evacuated to a pressure of ≤3×10-4torr; Spot welding is performed on the four sides between , II, after spot welding, first small current, then normal current continuous welding. After welding, it is heated to 500 ℃ in a heating furnace, rolled into a composite slab, and then hot rolled into a heterogeneous composite plate. The carbon steel part of the edge is cut off, and then the two stainless steel plates are separated from the middle coated with the separator. The invention can make a welded blank at one time, shorten the processing cycle, reduce the production cost, avoid the generation of air bubbles in the later heating process, ensure the product quality, and improve the yield of the composite board. standard requirement.

Description

technical field [0001] The invention belongs to the technical field of composite plate production technology, and in particular relates to a method for producing a heterogeneous composite plate by compounding a 200-260 mm back-base carbon steel plate and a 20-35 mm thick clad stainless steel plate. Background technique [0002] Stainless steel composite plate is a composite steel plate made of carbon steel base layer and stainless steel clad layer. Its main feature is that carbon steel and stainless steel form a firm metallurgical bond. It is a material that has both the advantages of stainless steel and carbon steel. It has been Widely used in petroleum, chemical industry, salt industry, water conservancy, electric power and other industries. As a resource-saving product, it can greatly reduce the construction cost, realize the perfect combination of low cost and high performance, and have good economic and social benefits. [0003] At present, the production methods of st...

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Problems solved by technology

[0004] However, in the process of hot rolling the combined billet by the current vacuum rolling method, there is gas in the composite interface, which leads to a certain degree of oxidation at the composite interface, and the vacuum cannot generate an absolute vacuum, and residual gas remains between the composite interface and the two-layer stainless steel interface. There is a very small amount of gas, which expands in the hot rolling state and cannot be discharged, which seriously affects the bonding rate and bonding strength of the composite interface, resulting in a low yield of composite panels