| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inexpensive steel for cold press die achieving hardness and toughness required as a cold press die and reducing used amount of expensive elements as much as possible.SOLUTION: There is provided a cold tool steel used for a die for molding such as cold press containing, by mass%, C:0.75 to 0.90%, Si:0.30 to 0.90%, Mn:0.20 to 0.60%, Cr:6.50 to 8.50%, Mo:0.20 to 0.50% and further V:0.10% or less as impurities and having a chemical composition of 1.50≤[%C]/C≤1.80 of the formula (1) with C=0.06×[%Cr]+0.093×[%Mo] and consisting of the balance Fe with inevitable impurities. [% element] represents amount of alloy element in mass%.</p> |
