The invention discloses a method for improving the flaw detection qualified rate of an ultra-wide single-weight microalloyed steel plate The production method comprises the following steps: smeltingmolten steel in an electric furnace, refining in an LF refining furnace, carrying out vacuum treatment in a vacuum furnace, carrying out die casting on the molten steel after smelting by adopting a flat steel ingot, carrying out heating, rolling and heat treatment on the steel ingot in a soaking furnace, carrying out flaw detection, and finally obtaining a finished steel plate According to the method, the process idea of clean steel is adopted, the purity of the molten steel is improved, the sulfur content is reduced, Ca treatment is carried out, the heating and rolling process of the flat steel ingot is optimized, the characteristics of high purity, compact internal quality and the like are achieved, and the width of the obtained ultra-wide single-weight microalloyed steel plate is 3850-4000 mm with a single weight of 15-35t, and the qualified rate of flaw detection is 100%; the averaged transverse impact work of the steel plate at minus 30 DEG C is 180-220J, Z-direction performanceis 55-75%, good comprehensive performance and welding performance are achieved, cost is low, and the application prospects are wide

Production method for improving flaw detection qualified rate of ultra-wide single-weight microalloyed steel plate

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Production method for improving flaw detection qualified rate of ultra-wide single-weight microalloyed steel plate