オーステナイトステンレス鋼の耐塩化物応力腐食割れ性に及ぼす合金元素の影響

概要

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The influence of alloying elements on the susceptibility of austenitic stainless steels to chloride stress corrosion cracking has been investigated by means of 8 months' exposure test of spot-welded specimens at the interface of air and sodium chloride solution with 1000ppm Cl^- or 21000ppm Cl^- at 80℃. The occurrence of stress corrosion cracking has been clearly detected on the cross section of the specimen. Both 18Cr-10Ni stainless steel and 18Cr-18Ni stainless steel showed susceptibility to stress corrosion cracking in spite of the decrease in the amount of carbon, nitrogen, phosphorous and sulphur, or the addition of small amount of titanium, niobium, zirconium, vanadium, and tungsten. The addition of 2wt percent of copper, however, made the steels immune to chloride stress corrosion cracking, while the addition of silicon and molybdenum by 2wt percent had no effect to its protection.
社団法人日本鉄鋼協会の論文
1983-05-01