The purpose of annealing for S890Q equivalent

Sprin steel refers to the special alloy steel used to manufacture all kinds of springs and other elastic elements. S890Q equivalent, Spring steel has excellent comprehensive performance, good surface quality, accurate shape and size. The smelting of S890Q equivalent, spring steel is very important. It is necessary to ensure excellent metallurgical quality, not only to ensure accurate chemical composition, but also to guarantee high purity. The content of sulfur, phosphorus, oxygen and nitrogen of spring steel should be low, and the uniformity and stability of spring steel should be good.

Weathering steel generally adopts the process route of fine material into the furnace-smelting (converter, electric furnace-microalloying treatment-argon blowing-LF refining-low superheat continuous casting (feeding rare earth wire)-controlled rolling and cooling. The scrap steel is added into the furnace together with the charge, and smelted according to the conventional process. After the S890Q equivalent steel is tapped, deoxidizers and alloys are added. After the molten steel is treated with argon blowing, the molten steel is cast. By adding rare earth elements to the steel, the S890Q equivalent weathering steel is purified and the content of inclusions is greatly reduced.

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