Outside-furnace refining production method of steel used in carbon steel welding wire

Abstract

The invention relates to an outside-furnace refining production method of steel used in carbon steel welding wire. The invention belongs to the technical field of steelmaking. The process flow of the method comprises the steps that: molten steel obtained by combined blowing converter smelting is adopted; in-ladle deoxidization alloying is carried out during tapping; molten steel is lifted to an argon blowing station; molten steel components are regulated through ladle argon bottom blowing at the argon blowing station, and indicators such as oxygen content in steel are controlled; and after components, temperature and cleanliness are appropriate after treatment, the molten steel is lifted to a square billet casting machine for casting. According to the invention, a low-cost ladle argon bottom blowing refining method is used for replacing an original LF refining method. Molten steel component regulation, desulphurization and impurity removing of the molten steel are realized through entire process control. Therefore, qualified molten steel can be produced stably. The method has the advantage that the method can be used for replacing the LF outside-furnace refining method for producing various steel used in carbon steel welding wire. Chemical components of the steel material satisfy requirements of a standard, and the contents are stable. The mass percentage of C is plus or minus 0.02%, the mass percentages of Si and Mn are plus or minus 0.05%, the mass percentages of P and S are no higher than 0.020%, and the mass percentage of oxygen is no higher than 0.0040%. The cost is reduced by 80 Yuan per ton of steel.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular provides an out-of-furnace refining production method of steel for solid welding wire for gas shielded arc welding of carbon steel, which is applied to the production of steel for various carbon steel welding wires. Background technique [0002] In the past ten years, the rapidly developed solid wire for gas shielded arc welding has become an ideal high-efficiency welding material, which can realize high-speed and high-deposition welding in all positions. [0003] Welding wire is drawn from steel, and the quality of welding wire largely depends on the quality of steel. In particular, the welding wire for gas shielded arc welding can reach more than 90% of the drawing deformation during the production process, and the highest can reach 98%. The indicators of pulling performance are all demanding. [0004] In order to ensure that the provided steel meets the production and u...

AI Technical Summary

Problems solved by technology

Some steel mills try to produce steel for welding wire by using the out-of-furnace refining method of blowing argon gas at the bottom of the ladle, but there are problems in the uniformity of composition and the cleanliness of the steel, which leads to the quality of the steel not meeting the requirements for use

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