JPH06184695A - Steel for metal mold for plastic molding excellent in weldability and machinability - Google Patents
Steel for metal mold for plastic molding excellent in weldability and machinabilityInfo
- Publication number
- JPH06184695A JPH06184695A JP34187392A JP34187392A JPH06184695A JP H06184695 A JPH06184695 A JP H06184695A JP 34187392 A JP34187392 A JP 34187392A JP 34187392 A JP34187392 A JP 34187392A JP H06184695 A JPH06184695 A JP H06184695A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- machinability
- plastic molding
- weldability
- metal mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラスチック成形金型
の製作に使用するプレハードン鋼の改良に関する。FIELD OF THE INVENTION The present invention relates to improvements in pre-hardened steel used in the manufacture of plastic molding dies.
【０００２】[0002]
【従来の技術】大型の成形品の為の射出成形金型には、
Ｓ５５Ｃの様な一般構造用鋼や、SCM440のような中低炭
素鋼が、使用されている。2. Description of the Related Art For injection molding dies for large moldings,
General structural steels such as S55C and medium and low carbon steels such as SCM440 are used.
【０００３】金型の製作では、設計変更等で溶接による
補修を行なうことがある。溶接補修には、溶接割れ防止
のために予熱，後熱（ＳＲ）が必要となる。In the manufacture of molds, repairs may be performed by welding due to design changes or the like. Weld repair requires preheating and postheating (SR) to prevent weld cracking.
【０００４】均一な加熱を行なう為には、大型の炉が必
要であり、長時間の加熱も不可欠となる。In order to carry out uniform heating, a large furnace is required, and long-time heating is also indispensable.
【０００５】予熱が十分でないと、溶接割れを起こし易
いという欠点も生じる。If the preheating is not sufficient, there is a drawback that weld cracking is likely to occur.
【０００６】又、プラスチック成形金型用鋼に要求され
る特性は、焼入性が良いこと、断面の硬さ分布が均一で
あること、偏析が少なく鏡面加工性とシボ加工性が優れ
ていること。また切削性が良好であることがあげられ
る。[0006] Further, the properties required for a plastic molding die steel are good hardenability, uniform hardness distribution in cross section, little segregation and excellent mirror surface workability and grain workability. thing. Also, it has good machinability.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、現用
の材料の特性を維持しつつ、溶接性・切削性にすぐれた
プラスチック成形金型用鋼を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a steel for a plastic molding die which has excellent weldability and machinability while maintaining the characteristics of the current material.
【０００８】[0008]
【課題を解決するための手段】本発明の予熱・後熱が不
要で、溶接性かつ切削性にすぐれたプラスチック成形金
型用鋼は、Ｃ：０.１〜０.３％，Ｍｎ：０.５〜３.０
％，Ｃｒ：１.０〜３.０％，Ｍｏ：０.０３〜２.０％お
よびＳ：０.０１〜０.１０％かつＰ：０.０２ ％以下，
Ｓｉ：０.２５％以下，Ｃｕ：０.０５％以下であって、
残部が実質的にＦｅからなる合金組成を有する。Means for Solving the Problems A steel for a plastic molding die according to the present invention which does not require preheating and postheating and has excellent weldability and machinability is C: 0.1 to 0.3%, Mn: 0. .5-3.0
%, Cr: 1.0 to 3.0%, Mo: 0.03 to 2.0% and S: 0.01 to 0.10% and P: 0.02% or less,
Si: 0.25% or less, Cu: 0.05% or less,
The balance has an alloy composition consisting essentially of Fe.
【０００９】この合金組成に対して、Ｔｉを０.０５〜
０.１５％を加えることも可能である。With respect to this alloy composition, Ti is 0.05 to
It is also possible to add 0.15%.
【００１０】[0010]
【作用】断面が３００×１０００mmのような大型の金型
材料に対して、Ｈｓ４２〜４３を確保できるだけの焼入
性をもたせつつ、溶接割れ感受性を低くすることは難し
い。Ｈｓ４０を超える硬さのプレハードン鋼では、６０
０℃前後の焼もどしが必要で、質量効果を考慮した、焼
入性を確保するために、Ｍｎ，Ｃｒ，Ｍｏ，Ｖなどの焼
入性向上元素を添加する必要がある。そのために、溶接
補修に際して、３００℃前後の予熱が必要であった。It is difficult to reduce the weld cracking susceptibility to a large die material having a cross section of 300 × 1000 mm while having the hardenability to secure Hs 42 to 43. For pre-hardened steel with hardness over Hs40, 60
Tempering at around 0 ° C. is necessary, and in order to secure hardenability in consideration of mass effect, it is necessary to add a hardenability improving element such as Mn, Cr, Mo, V. Therefore, at the time of welding repair, preheating around 300 ° C was necessary.
【００１１】これを解決するには、低Ｓｉ化と共にＰお
よびＣｕを規制し、適量のＳを存在させることにより溶
接時に必要な予熱を省略させ、切削性を従来材より改良
できる。To solve this, P and Cu are regulated together with the reduction of Si, and an appropriate amount of S is present so that preheating necessary for welding can be omitted and the machinability can be improved as compared with the conventional material.
【００１２】[0012]
【実施例】表１に示す組成の鋼を溶製し、真空取鍋脱ガ
スにより得た鋳塊を鍛造後９００℃で１インチ３０分の
保持後油焼入を施し、次いで５５０〜５７０℃で２回焼
戻しの熱処理して試験片をつくり、溶接試験と切削試験
を行なった。本実施例ではいずれもベーナイト組織を有
するものであった。[Example] Steel having the composition shown in Table 1 was melted, and an ingot obtained by degassing in a vacuum ladle was forged, held at 900 ° C. for 1 inch and 30 minutes, oil-quenched, and then 550 to 570 ° C. A test piece was prepared by performing heat treatment by tempering twice in, and a welding test and a cutting test were performed. In this example, each had a bainite structure.
【００１３】[0013]
【表１】 [Table 1]
【００１４】１）溶接試験 JISZ3158による「斜めＹ形溶接割れ試験法」に従って溶
接を実施し、表面割れの有無を調査した。更に、切断し
て３断面の断面割れの有無を調査した。1) Welding test Welding was carried out in accordance with "diagonal Y-shaped weld cracking test method" according to JIS Z3158, and the presence or absence of surface cracking was investigated. Furthermore, it cut | disconnected and investigated the presence or absence of the cross-section crack of 3 sections.
【００１５】参照としてSCM440の従来材と同時評価を行
なった。その結果を表２に示す。As a reference, the simultaneous evaluation with the conventional material of SCM440 was performed. The results are shown in Table 2.
【００１６】[0016]
【表２】 [Table 2]
【００１７】従来材は、溶接割れを起こしたのに対し、
試作材は、いずれも割れは検出されず良好な結果が得ら
れた。Whereas the conventional material caused weld cracking,
No crack was detected in any of the prototype materials, and good results were obtained.
【００１８】２）切削試験 エンドミルによる切削試験を前項と同様にSCM440従来材
と同時に試作材を評価した。2) Cutting test In the same way as in the previous section, the cutting test with the SCM440 conventional material and the trial material were evaluated in the cutting test with the end mill.
【００１９】試験条件を表３に示す。Table 3 shows the test conditions.
【００２０】[0020]
【表３】 [Table 3]
【００２１】図１に、切削長に対するエンド刃摩耗Ｖ
Ｂ′，定常摩耗ＶＢmax ，境界摩耗ＶＢ″を示す。FIG. 1 shows the end blade wear V with respect to the cutting length.
B ′, steady wear VBmax, and boundary wear VB ″ are shown.
【００２２】いずれも従来材に対し、試作材は良好な結
果が得られた。In all cases, the trial material obtained better results than the conventional material.
【００２３】[0023]
【発明の効果】本発明のプラスチック成形金型用鋼は、
溶接により補修するときに、予熱の必要がなく溶接の作
業性が大幅に改善され、また、溶接割れも起こらない。The steel for plastic molding die of the present invention is
When repairing by welding, there is no need for preheating, the workability of welding is greatly improved, and weld cracking does not occur.
【００２４】焼入性もよく、大型品においても均一な断
面硬さ分布を示す(Ｈｓ４０〜４３)。It has good hardenability and exhibits a uniform cross-sectional hardness distribution even in a large product (Hs 40 to 43).
【００２５】切削性も従来のSCM440より優れている。The machinability is also superior to that of the conventional SCM440.
【００２６】偏析の問題もなく、シボ加工性，鏡面加工
性も従来材と同等もしくは、優れた特性を示す。There is no problem of segregation, and the grain-workability and mirror-face workability are the same as or superior to those of conventional materials.
【図１】本発明に関する実験データの特性図。FIG. 1 is a characteristic diagram of experimental data relating to the present invention.
Ｌ…切削長。 L ... Cutting length.
Claims (2)
％，Ｃｒ：１.０〜３.０％，Ｍｏ：０.０３〜２.０％お
よびＳ：０.０１〜０.１０％かつＰ：０.０２％ 以下，
Ｓｉ：０.２５％以下，Ｃｕ：０.０５％以下であって、
残部が実質的にＦｅからなる合金組成を有することを特
徴とするプラスチック成形金型用鋼。1. C: 0.1-0.3%, Mn: 0.5-3.0
%, Cr: 1.0 to 3.0%, Mo: 0.03 to 2.0% and S: 0.01 to 0.10% and P: 0.02% or less,
Si: 0.25% or less, Cu: 0.05% or less,
A plastic molding die steel, characterized in that the balance has an alloy composition consisting essentially of Fe.
％，Ｃｒ：１.０〜３.０％，Ｍｏ：０.０３〜２.０％お
よびＳ：０.０１〜０.１０％かつＴｉ：０.０５〜０.１
５％を含有し、Ｓｉ：０.２５％以下，Ｐ：０.０２％以
下であって、残部が実質的にＦｅからなる合金組成を有
することを特徴とするプラスチック成形金型用鋼。2. C: 0.1 to 0.3%, Mn: 0.5 to 3.0
%, Cr: 1.0 to 3.0%, Mo: 0.03 to 2.0% and S: 0.01 to 0.10% and Ti: 0.05 to 0.1.
A steel for a plastic molding die, containing 5% of Si, 0.25% or less of Si, 0.02% or less of P, and the balance being substantially Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34187392A JPH06184695A (en) | 1992-12-22 | 1992-12-22 | Steel for metal mold for plastic molding excellent in weldability and machinability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34187392A JPH06184695A (en) | 1992-12-22 | 1992-12-22 | Steel for metal mold for plastic molding excellent in weldability and machinability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06184695A true JPH06184695A (en) | 1994-07-05 |
Family
ID=18349412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34187392A Pending JPH06184695A (en) | 1992-12-22 | 1992-12-22 | Steel for metal mold for plastic molding excellent in weldability and machinability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06184695A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997034021A1 (en) * | 1996-03-12 | 1997-09-18 | Bayer Aktiengesellschaft | Device and process for producing plastic components, especially polyurethane mouldings |
| EP2123787A1 (en) * | 2008-05-06 | 2009-11-25 | Industeel Creusot | High-grade steel for massive parts. |
| EP2503015A1 (en) * | 2009-11-17 | 2012-09-26 | Villares Metals S/A | Stainless steel for molds having a lower delta-ferrite content |
| JP2016145380A (en) * | 2015-02-06 | 2016-08-12 | 株式会社神戸製鋼所 | Steel for large sized forging and large sized forging component |
-
1992
- 1992-12-22 JP JP34187392A patent/JPH06184695A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997034021A1 (en) * | 1996-03-12 | 1997-09-18 | Bayer Aktiengesellschaft | Device and process for producing plastic components, especially polyurethane mouldings |
| US6136238A (en) * | 1996-03-12 | 2000-10-24 | Bayer Aktiengesellschaft | Device and process for producing plastic components, especially polyurethane moldings |
| EP2123787A1 (en) * | 2008-05-06 | 2009-11-25 | Industeel Creusot | High-grade steel for massive parts. |
| WO2009141556A1 (en) * | 2008-05-06 | 2009-11-26 | Industeel Creusot | Steel with high properties for solid parts. |
| US20110108169A1 (en) * | 2008-05-06 | 2011-05-12 | Industeel Creusot | Steel with high properties for solid parts |
| AU2009248619B2 (en) * | 2008-05-06 | 2012-05-24 | Industeel France | Steel with high properties for solid parts. |
| US9103008B2 (en) | 2008-05-06 | 2015-08-11 | Industeel Creusot | High-characteristic steel for large-size parts |
| EP2503015A1 (en) * | 2009-11-17 | 2012-09-26 | Villares Metals S/A | Stainless steel for molds having a lower delta-ferrite content |
| EP2503015A4 (en) * | 2009-11-17 | 2013-07-17 | Villares Metals Sa | Stainless steel for molds having a lower delta-ferrite content |
| JP2016145380A (en) * | 2015-02-06 | 2016-08-12 | 株式会社神戸製鋼所 | Steel for large sized forging and large sized forging component |
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