Preparation method of cold-rolled sheet for flux-cored wire

Abstract

The invention discloses a preparation method of a cold-rolled sheet for a flux-cored wire, belonging to the field of processing of metal materials. The cold-rolled sheet comprises the following chemical components in percentage by mass: 0.005-0.045 percent of C, less than or equal to 0.03 percent of Si, 0.15-0.26 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.010percent of S, less than or equal to 0.030 percent of Alt, less than or equal to 0.0030 percent of N and the balance of Fe. The method comprises the following steps of: performing hot rolling, acid washing and cold rolling in sequence on a steel billet to obtain a cold-rolled strip coil; and performing continuous annealing and flat processing methods. The cold-rolled sheet has the advantages of low yield strength, high tensile strength, excellent cold molding performance, excellent puling performance, high production speed, short period, high yield and high quality; and compared with the conventional process, the method has excellent advantages, and the use requirement of steel for the flux-cored wire can be better met.

Description

technical field [0001] The invention belongs to the field of metal material processing, and in particular relates to a preparation method of a cold-rolled sheet for flux-cored welding wire. Background technique [0002] Flux-cored welding wire is a new type of welding material that has developed rapidly in recent years. There are three production processes: steel pipe method, steel strip method, and wire rod method. The steel belt method has low cost and low technical difficulty, and is a production method commonly used in the world. The method of producing flux-cored welding wire by the steel strip method is to roll a thin steel strip into a round steel pipe, and at the same time fill it with a certain composition of powder, and then draw it. Flux-cored welding wire is also called tubular welding wire. By adjusting the type and proportion of flux-cored additives, it is very convenient to design various welding materials for different purposes. Because its alloy composition...

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Problems solved by technology

[0003] Although the prior art discloses a cold-rolled steel strip for flux-cored wire and its manufacturing method, and a steel for flux-cored wire sheath and its production method, the two production methods are based on SPCC, 08Al (or SPCD) When steel strips are used in the manufacture of flux-cored wires, there are problems such as unstable performance. Although these two methods have improved the performance of steel for flux-cored wires, they have solved the problems of high content of inclusion elements, low elongation, and It is prone to problems such as broken strips, but both methods are produced by single-stand rolling + bell annealing process. Long, low efficiency, not compatible with the current market demand for flux-cored wire cold-rolled strip steel consumption is growing explosively

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