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Optimum process parameters for inoculating iron–carbon melts with fine powders are determined. It is shown that inoculants for low-carbon steel can be arranged in the order of decreasing efficacy as follows: NbN → TiN → ZrN → NbC. Inoculation of steel 20 during uphill casting to produce twoton ingots by introduction of fine 1–3 μm TiN powder at a rate of 0.12 kg/t has improved all mechanical properties:...
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