Manufacturing method of austenitic stainless steel [section sign] 150 small-specification continuously-cast circular tube blanks

Abstract

The invention discloses a manufacturing method of austenitic stainless steel [section sign]150 small-specification continuously-cast circular tube blanks, and relates to the field of stainless steel production processes. The manufacturing method includes the specific preparation process of production in an electric arc furnace; AOD, LF, continuous casting; finishing; and delivery. According to themethod, on one hand, the smelting process is optimized, it is guaranteed that molten austenitic stainless steel can achieve the high-cleanliness metallurgical quality, and while the oxygen content and the inclusion content in steel are reduced, the situation that high-melting-point aluminum oxide is gathered on a continuous casting tundish water gap to affect continuous casting pouring is reduced. On the other hand, reasonable continuous casting process parameters are determined, and reasonable primary cooling water and secondary cooling water preparation parameters, crystallizer vibration parameters, covering slag types, pouring temperature, withdrawal speed, withdrawal and straightening machine pressure, electromagnetic stirring parameters and the like are formulated. Secondary oxidization is reduced in the pouring process, and contamination of the molten steel is reduced. The continuously-cast circular tube blanks produced with the method can be directly subjected to tube penetration, round steel forging and rolling procedures are reduced, the productivity can be greatly improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of stainless steel production technology of metal materials, and discloses a manufacturing method of high-quality austenitic stainless steel § 150 small-sized continuous casting round tube blanks, which is mainly used for the production of austenitic stainless steel round tube blanks. Background technique [0002] At present, the domestic production of stainless steel seamless steel pipes has gradually used continuous casting slabs to directly thread the pipes. Although direct threading can save a rolling process and improve the yield, there are stricter requirements on the quality of the continuous casting slabs. With the popularization of the continuous casting slab direct piercing process, the market has higher and higher requirements and expectations for the cross-sectional size, variety and quality of the continuous casting round slab. [0003] Compared with the traditional use of steel ingots to roll round steel...

AI Technical Summary

Problems solved by technology

But those who are familiar with the continuous casting process know that the smaller the cross-sectional size of the continuous casting slab, the more difficult the production and the more complicated the process

According to data query and records, the continuous casting round billet of §150 size in China currently belongs to the blank field, and no relevant valuable continuous casting round billet information and related research information have been found in domestic and foreign literature searches

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