Additive layer manufactured hot work tool, method for manufacturing the same, and metal powder for additive layer manufacturing hot work tool
US-2021040591-A1 · Feb 11, 2021 · US
Hot work tool steel and hot work tool
US2021262071A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021262071-A1 |
| Application number | US-201917276827-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 9, 2019 |
| Priority date | Oct 5, 2018 |
| Publication date | Aug 26, 2021 |
| Grant date | — |
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Abstract
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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 1Value 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
First claim
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1 . 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. 2 . The hot work tool steel according to claim 1 , wherein there is 0.2-0.5% of Ni in mass %. 3 . 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. 4 . The hot work tool according to claim 3 , wherein there is 0.2-0.5% of Ni in mass %. 5 . The hot work tool steel according to claim 1 , wherein the hot work tool steel containing, in mass %, 0.32 to 0.40% of C, 0.20 to 0.33% of Si, 0.55 to 0.85% of Mn, 0 to 0.1% of Ni, 5.2 to 5.4% of Cr, 1.4 to 1.5% of Mo or 1/2W by itself or 1.4 to 1.5% of (Mo+1/2W) in combination, 0.65 to 0.80% of V, and a balance of Fe and impurities, and the relationship of the content of each element calculated by the Formula 1 and the Formula 2 satisfies that value A is 6.50 to 7.80 and value B is 0.90 to 1.00. 6 . The hot work tool according to claim 3 , wherein the hot work tool containing, in mass %, 0.32 to 0.40% of C, 0.20 to 0.33% of Si, 0.55 to 0.85% of Mn, 0 to 0.1% of Ni, 5.2 to 5.4% of Cr, 1.4 to 1.5% of Mo or 1/2W by itself or 1.4 to 1.5% of (Mo+1/2W) in combination, 0.65 to 0.80% of V, and a balance of Fe and impurities, and the relationship of the content of each element calculated by the Formula 1 and the Formula 2 satisfies that value A is 6.50 to 7.80 and value B is 0.90 to 1.00.
Assignees
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Classifications
Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02) · CPC title
containing Cr and Ni · CPC title
Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62) · CPC title
- C22C38/46Primary
with vanadium · CPC title
- C22C38/44Primary
with molybdenum or tungsten · CPC title
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- What does patent US2021262071A1 cover?
- 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…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C38/46. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 26 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).