Effect of δFerrite on Sulfide Stress Cracking in a Low Carbon 13mass% Chromium Steel
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概要
- 論文の詳細を見る
It is important for the 13 mass% chromium steels to keep the passivation in order to improve SSC (Sulfide Stress Cracking) resistance in sour environments. For example, the addition of molybdenum and chromium is effective to keep the passivation. However, when these elements are excessively added, δ-ferrite is formed. Therefore, the effect of δ-ferrite on SSC in the low carbon 13 mass% chromium steels was investigated. SSC occurred in the case that δ-ferrite is formed to some extent because the corrosion potential was lowered to that of the active state. The occurrence of SSC did not depend on the difference of shape of δ-ferrite. The reason for the difference in corrosion potential with and without δ-ferrite is attributed to the existence of a chromium depleted zone due to the precipitation of chromium carbides or nitrides near the δ-ferrite.
- 社団法人 日本鉄鋼協会の論文
- 2000-11-15
著者
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Hara T
Nippon Steel Corp. Chiba Jpn
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Hara Takuya
Nippon Steel Corporation Steel Research Laboratories
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Asahi H
Nippon Steel Corp. Chiba Jpn
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Asahi Hitoshi
Nippon Steel Corporation Steel Research Laboratories
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- Effect of δFerrite on Sulfide Stress Cracking in a Low Carbon 13mass% Chromium Steel
- Role of Combined Addition of Niobium and Boron and of Molybdenum and Boron on Hardnenability in Low Carbon Steels
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