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The principle of the dephosphorization for stainless steels differs from that of other low alloy steels,which should not only decrease phosphorous content efficiently but also keep the concentration of Cr almost lossless.In these cases,two techniques can be selected.The strategy for oxidational dephosphorization is illustrated in terms of “the selective oxidation among elements[Cr],[P]and[C].So there are two critical W_([C]) values.If the real W_([C]) locates between these two critical values,the dephosphorization process will be optimized.The optimized region deduced theoretically coincides with the reported range very well.The experiment of reductional dephosphorization was carried out in a sealed reactor.The dephosphorization degree reached 55.4%-78.0%when the original phosphorous content was0.04%-0.05%.The processing parameters and the way to avoid pollution were suggested.So this process seems to be possibly adopted in industrial scale.
The principle of the dephosphorization for stainless steels differs from that of other low alloy steels, which should not only reduce phosphorous content efficiently but also keep the concentration of Cr almost lossless. In these cases, two techniques can be selected. The strategy for oxidational dephosphorization is illustrated in terms of ”the selective oxidation among elements [Cr], [P] and [C] .So there are two critical W _ ([C]) values.If the real W _ ([C]) locates between these two critical values, the dephosphorization process will be optimized. optimized region deduced theoretically coincides with the reported range very well. The experiment of reductional dephosphorization was carried out in a sealed reactor. The dephosphorization degree reached 55.4% -78.0% when the original phosphorous content was0.04% -0.05%. The processing parameters and the way to avoid pollution were suggested.So this process seems to be possibly adopted in industrial scale.