METHOD FOR IMPROVING WATER VAPOR OXIDATION RESISTANCE OF FERRITIC HEAT RESISTANT STEEL, FERRITIC HEAT RESISTANT STEEL HAVING EXCELLENT WATER VAPOR OXIDATION RESISTANCE, AND HEAT RESISTANT STEEL FOR BOILER

摘要

PROBLEM TO BE SOLVED: To provide a mean capable of easily and economically improving the oxidation resistance of a Cr-containing ferritic steel.;SOLUTION: Cr-containing powder particles 3 are made to collide against the surface of a Cr-containing ferritic heat resistant steel tube 1, so as to be carried thereon, and a Cr oxide layer 4 having a high Cr concentration is formed on the surface of the ferritic steel at high temperature.;COPYRIGHT: (C)2007,JPO&INPIT