PURPOSE: To provide a fluid equipment where the work hardenability is improved, the corrosion resistance is excellent, the matrix is stabilized and micronized, and the cavitation resistance is excellent by forming a clad layer by welding of the austenitic steel containing a specific composition on the surface of the fluid equipment made of 13 Cr martensitic stainless steel.
CONSTITUTION: In a fluid equipment to be used for the river water or sea water, the clad layer by welding made of austenitic steel having the composition consisting of, by weight, 0.10-0.30% C, ≥1% Se, ≤2% Mn, 16.00-23.00% Cr, 1.00-8.00% Ni, 2.00-9.00% Co, and 6.00-12.00% Ni+Co is formed on the area of a member made of 13 Cr steel containing Ni to be subject to the cavitation in advance, or on the damaged area thereby. This constitution strengthens the resistance against the damage of the member, reduces the damages of the member by the cavitation, improves the service life of the parts and the working efficiency, and extend the period of changing the parts.
TAKAYASU HIROSHI (JP)
KONUMA TSUTOMU (JP)
KARITA MAKOTO (JP)
