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■■■■■■■■■■■■■■■■■■■ 川崎製鉄技報 KAWASAKI STEEL GIHO Vol.14 (1982) No.4 ■■■■■■■■■■■■■■■■■■■ |
| 溶接構造用耐海水鋼 MARIWEL の特性 Properties of Seawater Corrosion Resistant Steel MARIWEL for Welded Structure 栗栖 孝雄(Takao Kurisu) 今津 司(Tsukasa Imazu) 西山 昇(Noboru Nishiyama) 鈴木 健人(Taketo Okumura) 久野 忠一(Tadakazu Kyuno) |
| 要旨 : 使用環境に応じた3種類の溶接構造溶接用耐海水鋼“MARIWEL”を開発した。MARIWEL Hは飛沫帯用50kgf/mm2級，MARIWEL Kは海中用41および50kgf/mm2，MARIWEL Rは飛沫帯，海中両環境用41および50kgf/mm2低合金鋼である。上記鋼種のうち，主に50kgf/mm2級現場工程について確性試験を行った結果，母材特性，溶接性および溶接継手性能は優れた特性を示し，それぞれの使用環境で普通鋼の約2倍の耐食性を示した。 |
| Synopsis : Three Types of weldable seawater corrosion resistant steels,"MARIWEL", have been developed: MARIWEL H50 is a 50kgf/mm**2 class low alloy steel containing Cu, Ni and Mo, and has good corrosion resistance in splash zone; MARIWEL K is a 41 or 50kgf/mm**2 class low alloy steel containing Cr, and Mo, and has a good corrosion reisistance is submerged zone; and MARIWEL R is a 41 or 50kgf/mm**2 class low alloy steel containing Cr, Cu and Ni, which shows good corrosion resistance in both splash and submerged zone. The test results for the commercially produced steel plates indicate that these steels have good mechanical properties and weldabilities as well as excellent seawater-corrosion resistance. These steels show about twice corronsion resistance compared with that of ordinary steels such as SM50B. |
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