19Cr-9Ni ステンレス鋼溶着金属中の酸化介在物について

概要

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An investigation was made of oxide inclusions in 19Cr-9Ni stainless steel weld metal which was produced using a electrode covered with lime-titania. 2MnO・SiO_2 (tephroite), MnO・SiO_2 (rhodonite), FeO・Cr_2O_3 (chromite), FeO・Ti_2O_3, Cr_<23>C_6, TiC, and TiN were identified by the X-ray analysis of the residue separated from the weld metal by ultrasonic agitating dissolution method using 14% I_2-CH_3OH solution. The inclusion particles extracted were classified according to the size (5μ over and under) by ultrasonic sieving method, and observed by optical microscope. Typical inclusion particles over 5μ were analyzed by electronprobe X-ray microanalyzer. It was found that inclusion particles over 5μ were mainly spheroidal MnO・SiO_2, 2MnO・SiO_2, angular SiO_2, massive SiO_2, plate-like SiO_2, rod-like Al-silicate, needle-like TiN, and stringer-like Ca-phosphate. Inclusion particles less than 5μ amount to about 90% of oxide inclusions, and they contain mainly Mnsilicate, FeO・Cr_2O_3, and FeO・Ti_2O_3, the size of which was 1μ or under.
社団法人日本鉄鋼協会の論文
1978-07-01