| 摘要 |
<p>PURPOSE:To obtain a water apparatus with superior erosion resistance by forming the surface layer of at least a part worn by cavitation erosion with a specified phase of iron contg. a specified percentage each of C, Si, Cr, Ni, Mn and Mo. CONSTITUTION:A surface layer consisting of, by wt., 10-20% Cr, 0.5-10% Ni and 2-20% Mn as principal components, <=0.2% C, <=2% Si, <=2% Mo and the balance essentially Fe or further contg. at least one kind of 0.01-0.1% Nb and 0.5-5% Co is formed on at least a part worn by cavitation erosion. This surface layer is made of steel contg. epsilon phase or austenite phase and not contg. ferrite phase practically. Thus, the cavitation erosion resistance is improved remarkably.</p> |
