| 摘要 |
<p>An iron-base alloy which comprises C in an amount of 1.5 to 2.5 wt %, Ni in an amount of 0.25 to 4.75 wt %, W and V in an amount fallen in the region surrounded by the line (a) shown in appending, and Fe and inevitable impurities in a balanced amount, and has a base structure containing a Metal-C type carbide; a method for producing the iron-base alloy which comprises a first heat treatment step of subjecting an iron-base alloy having the above composition to a solution treatment through quenching it from a temperature higher than its austenite transformation temperature, to form a mixed structure comprising base structures of martensite and retained austenite and an undissolved carbide, and a second heat treatment step of precipitation a MC type carbide within an eutectoid transformation temperature zone and then cooling to thereby precipitate low carbon austenite.</p> |
