Hot work tool steel and hot work tool
AssigneeHitachi Metals, Ltd.
InventorsYousuke NAKANO, Shiho FUKUMOTO, Kouta KATAOKA
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Abstract
The hot work tool steel or hot work tool contains, in mass %, 0.25 to 0.45% of C, 0.1 to 0.4% of Si, 0.5 to 0.9% of Mn, 0 to 0.6% of Ni, 4.9 to 5.5% of Cr, 1.3 to 2.3% of Mo or 1/2W by itself or 1.3 to 2.3% of (Mo+1/2W) in combination, 0.6 to 0.9% of V, and a balance of Fe and impurities, and value A and value B calculated by the following Formula 1 and Formula 2 satisfy that value A is 6.00 or more and value B is 1.00 or less. Value A=−0.7(% Si)+1.5(% Mn)+1.3(% Ni)+0.9(% Cr)+0.6(%(Mo+1/2W))+0.3(% V) Formula 1 Value B=1.9(% C)+0.043(% Si)+0.12(% Mn)+0.09(% Ni)+0.042(% Cr)+0.03(%(Mo+1/2W))−0.12(% V) Formula 2
Claims6
A hot work tool steel containing, in mass %, 0.25 to 0.45% of C, 0.1 to 0.4% of Si, 0.5 to 0.9% of Mn, 0 to 0.6% of Ni, 4.9 to 5.5% of Cr, 1.3 to 2.3% of Mo or 1/2W by itself or 1.3 to 2.3% of (Mo+1/2W) in combination, 0.6 to 0.9% of V, and a balance of Fe and impurities, wherein the relationship of the content of each element calculated by the following Formula 1 and Formula 2 satisfies that value A is 6.00 or more and value B is 1.00 or less,
- Value A=−0.7(% Si)+1.5(% Mn)+1.3(% Ni)+0.9(% Cr)+0.6(%(Mo+1/2W))+0.3(% V) Formula 1
- Value B=1.9(% C)+0.043(% Si)+0.12(% Mn)+0.09(% Ni)+0.042(% Cr)+0.03(%(Mo+1/2W))−0.12(% V) Formula 2
- wherein the content of each element is shown in parentheses.
A hot work tool containing, in mass %, 0.25 to 0.45% of C, 0.1 to 0.4% of Si, 0.5 to 0.9% of Mn, 0 to 0.6% of Ni, 4.9 to 5.5% of Cr, 1.3 to 2.3% of Mo or 1/2W by itself or 1.3 to 2.3% of (Mo+1/2W) in combination, 0.6 to 0.9% of V, and a balance of Fe and impurities, wherein the relationship of the content of each element calculated by the following Formula 1 and Formula 2 satisfies that value A is 6.00 or more and value B is 1.00 or less,
- Value A=−0.7(% Si)+1.5(% Mn)+1.3(% Ni)+0.9(% Cr)+0.6(%(Mo+1/2W))+0.3(% V) Formula 1
- Value B=1.9(% C)+0.043(% Si)+0.12(% Mn)+0.09(% Ni)+0.042(% Cr)+0.03(%(Mo+1/2W))−0.12(% V) Formula 2
- wherein the content of each element is shown in parentheses.
Dependencies are inferred from the claim text.