| 摘要 |
PURPOSE: To produce an austenitic steel excellent in corrosion resistance, strength and radiation irradiation damage resistance by extremely refining the grain size in a uniform manner, to provide a method for producing the same and to produce nuclear reactors, nuclear fusion reactors and their structural parts using the same. CONSTITUTION: This high corrosion resistant and high strength austenitic sintered steel has a compsn. contg., by weight, <=0.1% C, <=1% Si, <=2.0% Mn, 9 to 30% Ni and 14 to 20% Cr, in which the average grain size is regulated to <=1μm and having >=90vol.% austenitic phase. Or, at least one kind among <=3% Mo, <=1.0% Ti, <=2.0% Zr and <=1.0% Nb is incorporated therein, and these steels are used for parts applied with neutron irradiation and contacted with high temp. water such as structural materials in nuclear reactors and nuclear fusion reactors.
|
