| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat resistant steel for forging excellent in prolonged creep rupture life, creep rupture ductility, toughness and steam oxidation resistance, a manufacturing method thereof, forging parts configured using the heat resistant steel for forging, and the manufacturing method of the same. <P>SOLUTION: The heat resistant steel for forging contains, by mass%, C: 0.05-0.2, Si: 0.01-0.1, Mn: 0.01-0.15, Ni: 0.05-1, Cr: 8 or more and less than 10, Mo: 0.05-1, V: 0.05-0.3, Co: 1-5, W: 1-2.2, N: 0.01 or more and less than 0.015, Nb: 0.01-0.15, B: 0.003-0.03, and a remainder comprising Fe and unavoidable impurities. <P>COPYRIGHT: (C)2012,JPO&INPIT |
