Cast cold tool and method for producing the same

Details Cast cold tool and method for producing the same Cast cold tool and method for producing the same

1998-03-26

2000-02-15

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

420111, 148545, 148622, 148334, C21D 900, C22C 3822, C22C 3824, C22C 3826

Patent

active

060249161

ABSTRACT:
A cast cold tool is obtained through the steps of forming a casting by founding a molten steel consisting by weight percentage of 0.5 to 0.8% of C, not more than 1.0% of Si, 0.25 to 1.50% of Mn, 4.0 to 8.0% of Cr, 1.0 to 5.0% of Mo, one or both of 0.2 to 1.0% of V and 0.2 to 2.0% of Nb, opptionally not more than 2.5% of W, not more than 2.5% of Ni, and the balance being Fe plus incidental impurities, subjecting the casting to solid solution treatment to decrease primary carbides precipitated in the casting to not more than 1%, preferably to extinguish completely, and subjecting the solid-solution treated casting to quenching and tempering treatment to give predetermined toughness and hardness to the casting.

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