JP2005171305A5 - Manufacturing method of steel for pre-hardened mold - Google Patents
Manufacturing method of steel for pre-hardened mold Download PDFInfo
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- JP2005171305A5 JP2005171305A5 JP2003411691A JP2003411691A JP2005171305A5 JP 2005171305 A5 JP2005171305 A5 JP 2005171305A5 JP 2003411691 A JP2003411691 A JP 2003411691A JP 2003411691 A JP2003411691 A JP 2003411691A JP 2005171305 A5 JP2005171305 A5 JP 2005171305A5
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Description
本発明は、プリハードン状態で金型に加工される金型用鋼の製造方法に関するものである。 The present invention relates to a method of manufacturing a mold steel that is processed into a mold in a pre-hardened state.
上述したような問題を解消するために、発明者らは鋭意開発を進めた結果、Ｓ添加量を制御することにより、硫化物の応力集中効果による被削性の向上を図るとともに、鍛錬比および冷却速度制御の相乗効果（凝固組織の破壊、結晶粒内組織の微細化）により、割れ感受性の低減を図り、金型寿命と加工性を両立した金型寿命の安定化を図ることが出来るプリハードンでの金型加工性が良好な金型用鋼の製造方法を提案するものである。 In order to solve the above-described problems, the inventors have made intensive developments, and as a result, by controlling the amount of S added, the machinability is improved by the stress concentration effect of sulfide, and the forging ratio and Pre-hardening that can reduce the susceptibility to cracking and stabilize the mold life with both mold life and workability due to the synergistic effect of cooling rate control (breakage of solidification structure and refinement of grain structure) The manufacturing method of the steel for metal mold | die with favorable mold workability in is proposed.
その発明の要旨とするところは、
（１）質量％で、Ｃ：０．１〜０．６％、Ｓｉ：０．１〜１．５％、Ｍｎ：０．１〜０．７％、Ｃｒ：１．０〜６．０％、Ｎｉ：０．０５〜１．２％、Ｓ：０．００５〜０．０６％、Ｍｏ＋１／２Ｗ：０．５〜２．５％、および、Ｖ＋１／２Ｎｂ：０．１〜２．０％、残部Ｆｅおよび不可避的不純物からなる鋼を、鍛錬比（ｓ）：４〜１０で熱間加工した後焼入に際し、焼入温度から焼入温度より５００℃低い温度までの範囲での冷却速度を３℃／ｍｉｎ以上で冷却してなるプリハードン金型用鋼の製造方法。
（２）前記（１）に記載の成分組成に加えて、Ｃａ：０．０００３〜０．１％、Ｍｇ：０．０００３〜０．１％の１種または２種を添加することを特徴とするプリハードン金型用鋼の製造方法である。
The gist of the invention is that
(1) By mass%, C: 0.1-0.6%, Si: 0.1-1.5%, Mn: 0.1-0.7%, Cr: 1.0-6.0% Ni: 0.05-1.2%, S: 0.005-0.06%, Mo + 1 / 2W: 0.5-2.5%, and V + 1 / 2Nb: 0.1-2.0% , The steel composed of the remaining Fe and unavoidable impurities is hot-worked at a forging ratio (s): 4 to 10 and then quenched, and the cooling rate in the range from the quenching temperature to a temperature lower by 500 ° C. than the quenching temperature. Is a method for producing pre-hardened mold steel that is cooled at 3 ° C./min or more .
(2) In addition to the component composition described in (1), one or two of Ca: 0.0003 to 0.1% and Mg: 0.0003 to 0.1% are added. This is a method for producing prehardened mold steel.
以上述べたように、本発明による硫化物の応力集中効果による被削性の向上を図ると共に、鍛錬比および冷却速度制御の相乗効果により、割れ感受性の低減を図ることにより硬さ、耐ヒートチェック性などの諸特性を低下させることなく、プリハードン加工性に優れた割れ感受性の低減を図ることが出来る金型鋼の製造方法を提供することが出来る極めて優れた効果を奏するものである。 As described above, the machinability is improved by the stress concentration effect of the sulfide according to the present invention, and the hardness and heat resistance check is achieved by reducing the crack sensitivity by the synergistic effect of the forging ratio and the cooling rate control. It is possible to provide a die steel manufacturing method capable of reducing crack susceptibility excellent in pre-hardened workability without degrading various properties such as properties, and exhibiting an extremely excellent effect.
Claims (2)
Ｃ：０．１〜０．６％、
Ｓｉ：０．１〜１．５％、
Ｍｎ：０．１〜０．７％、
Ｃｒ：１．０〜６．０％、
Ｎｉ：０．０５〜１．２％、
Ｓ：０．００５〜０．０６％、
Ｍｏ＋１／２Ｗ：０．５〜２．５％、および、Ｖ＋１／２Ｎｂ：０．１〜２．０％、残部Ｆｅおよび不可避的不純物からなる鋼を、鍛錬比（ｓ）：４〜１０で熱間加工した後焼入に際し、焼入温度から焼入温度より５００℃低い温度までの範囲での冷却速度を３℃／ｍｉｎ以上で冷却してなるプリハードン金型用鋼の製造方法。 % By mass
C: 0.1-0.6%
Si: 0.1 to 1.5%,
Mn: 0.1 to 0.7%,
Cr: 1.0-6.0%,
Ni: 0.05-1.2%,
S: 0.005-0.06%,
Mo + 1 / 2W: 0.5-2.5%, and V + 1 / 2Nb: 0.1-2.0%, the steel composed of the balance Fe and inevitable impurities is heated at a forging ratio (s): 4-10. A method for producing steel for pre-hardened molds, which is obtained by cooling at a cooling rate of 3 ° C./min or more in the range from the quenching temperature to a temperature lower by 500 ° C. than the quenching temperature after quenching .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003411691A JP4347033B2 (en) | 2003-12-10 | 2003-12-10 | Manufacturing method of steel for pre-hardened mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003411691A JP4347033B2 (en) | 2003-12-10 | 2003-12-10 | Manufacturing method of steel for pre-hardened mold |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2005171305A JP2005171305A (en) | 2005-06-30 |
| JP2005171305A5 true JP2005171305A5 (en) | 2007-08-23 |
| JP4347033B2 JP4347033B2 (en) | 2009-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003411691A Expired - Fee Related JP4347033B2 (en) | 2003-12-10 | 2003-12-10 | Manufacturing method of steel for pre-hardened mold |
Country Status (1)
| Country | Link |
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| JP (1) | JP4347033B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046915B (en) * | 2014-04-28 | 2016-05-11 | 如皋市宏茂重型锻压有限公司 | High performance hot-work die steel and preparation technology thereof for the die casting of heavy in section |
| CN112375986A (en) * | 2020-11-13 | 2021-02-19 | 江苏沙钢集团有限公司 | Hot-rolled and tempered pre-hardened plastic die steel plate and production method thereof |
| CN114592107B (en) * | 2021-11-09 | 2023-08-04 | 山西太钢不锈钢股份有限公司 | Preparation method of pre-hardened corrosion-resistant 4Cr16NiMo die steel medium plate |
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2003
- 2003-12-10 JP JP2003411691A patent/JP4347033B2/en not_active Expired - Fee Related
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