18%Cr系ステンレス鋳鋼の海水中での耐エロージョン性

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タイトル別名
  • Erosion Resistance of 18%Cr Cast Stainless Steel in Sea Water
  • 18パーセント Crケイ ステンレス チュウコウ ノ カイスイチュウ デ ノ

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Recently, a new high strengh 18%Cr cast stainless steel (C≤0.04%, Cr: 16∼18%, Ni: 5∼7%, Mo: 1%) has been put into practical use for marine propellers. The erosion resistance of this steel was compared with that of other cast stainless steels such as martensitic cast stainless steel and nickel aluminum bronze. The results are summarized as follows:<BR>(1) Pitting potential of the steel, which consists of martensitic, austenitic and ferritic phases, is 0.27∼0.33 V(vs Ag/AgCl/KCl) in sea water. This result shows the corrosion resistance of the steel is better than that of SUS304 and martensitic cast stainless steels.<BR>(2) The hardness of the steel was lower than that of martensitic cast stainless steel. The erosion resistance of the steel was, however, higher than that of other cast stainless steels. This was due to hardening of the surface of the erosion test specimen caused by the stress induced martensitic transformation of the residual austenitic phase.<BR>(3) The erosion resistance of the steel was about two times higher than that of nickel aluminum bronze.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 57 (3), 307-311, 1993

    公益社団法人 日本金属学会

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