| 摘要 |
PROBLEM TO BE SOLVED: To provide low-cost tool steel which has satisfactory workability on working into a die shape, can allow a required part such as a cutting edge to exhibit hardness needed as that of a tool by partial supercooling (subzero) treatment, thus requires no quenching treatment for exhibiting hardness and precision working for removing strains attendant on the treatment, and can simplify a process for producing a die. SOLUTION: The austenitic tool steel has a composition containing, by weight, 0.6 to 2.0% C, <=3.0% Si, 0.2 to 15.0% Mn, 0.2 to 10.0% Cr, 0.2 to 10.0% Ni, 0.1 to 4.0% 2Mo+W, and 0.02 to 0.4% S and the balance substantially Fe, and has an austenite content of >=80% in an ordinary temperature condition after cooling from an austenitizing temperature.
|
