20g (Ti) boiler plate is a kind of steel with higher comprehensive mechanical properties, relatively pure steel, smelting composition and microalloying elements sensitive to various properties. Therefore, the key to the 20g (Ti) production process is to optimize the smelting composition, reduce the total amount of inclusions in the steel, select suitable micro-alloying elements, use controlled rolling, improve the quality of the board surface, and stabilize the aging impact. The technical route of 20g is: high-quality molten iron → purification treatment → composition optimization and steel purification smelting → micro-alloying and refining of molten steel → protective pouring → high quality slab → controlled heating → temperature controlled rolling → plate type and thickness control → Control cooling → product.
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