| 摘要 |
PURPOSE:To obtain the titled material superior in wear resistance, sea water corrosion resistance by prescribing the Ni equivalent, and the totaled quantity of ferrite phase + martensitic phase in an alloy steel having respective prescribed contents of C, Si, 0.5Mn+Ni, Cr, Mo, Co. CONSTITUTION:The wear resistant and corrosion resistant material consists of 0.05-0.15% C, <=2.0% Si, 0.4-7.0% 0.5Mn+Ni, 15-20% Cr, 1.0-5.0% Mo, 3.0- 8.0% Co and the balance substantially Fe, and satisfies the following conditions. Namely, the material is regulated to 16-26% Ni equivalent (Ni%+0.65Cr%+ 0.98Mo%+1.05Mn%+0.35Si%+12.6C%), further, to be composed of <=25% totaled quantity of ferrite phase + martensitic phase, and the balance austenitic phase or Ypsilon phase. The material has superior characteristics which are the same as 17-4PH steel or more in wear and sliding resistances and as SCS13 or more in sea water corrosion resistance respectively.
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