準安定オーステナイト域における塑性加工が 13Cr 鋼の耐食性におよぼす影響について

概要

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The corrosion resistance of 13% Cr stainless steel as deformed in the metastable austenite state prior to martensite transformation was qualitatively compared with that of the same steel as quenched conventionally. As corrosive environment, 40% HNO_3 in boiling state and 5% H_2SO_4 at room temperature were chosen. It was observed that, compared with undeformed steel, deformed steel at 450℃ did not show a poorer resistance to both acid solutions when steel was austenitized at 950℃ or 1000℃. However, the corrosion resistance of the steel became worse by deformation at 650℃, especially in 5% H_2SO_4. It seemed that this poorer corrosion resistance by deformation at 650℃ was due to a heterogeneity of structure induced by the product of accelerated isothermal transformation.
1962-08-01