Research on Optimization Effect of Low Cost Q460MC Process
By optimizing the composition and controlled rolling and cooling process of Q460MC steel plate,a reasonable match between yield strength and elongation was achieved,and the alloy cost was successfully reduced by 34 yuan/ton.The specific optimization measures include:increasing the carbon content by 0.02%to avoid entering the range of peritectic steel;Reduce manganese content by 0.15%and niobium content by 0.01%.In terms of rolling process,increasing the cooling rate to 15～22℃/S and controlling the redness temperature between 580～620℃is not only beneficial for improving the strength index,but also for obtaining the surface bainite structure and solving the problem of plate warping.After optimization,the elongation performance index has improved by 1～3%compared to before optimization.
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