JP2000202548A - Clad metallic mold for hot pressing and manufacture thereof - Google Patents
Clad metallic mold for hot pressing and manufacture thereofInfo
- Publication number
- JP2000202548A JP2000202548A JP11010797A JP1079799A JP2000202548A JP 2000202548 A JP2000202548 A JP 2000202548A JP 11010797 A JP11010797 A JP 11010797A JP 1079799 A JP1079799 A JP 1079799A JP 2000202548 A JP2000202548 A JP 2000202548A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- base material
- hip
- die
- clad
- 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.)
- Granted
Links
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
- Laminated Bodies (AREA)
- Powder Metallurgy (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、型寿命向上を図っ
た熱間プレス用クラッド金型およびその製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clad mold for hot pressing and a method for manufacturing the same, which improves the life of the mold.
【０００２】[0002]
【従来の技術】従来、熱間プレス用金型の寿命を向上さ
せるために、熱間プレス用金型用工具鋼の耐高温軟化抵
抗性・耐摩耗性向上などの材質改善がなされている。こ
のような改善により、金型の寿命は１０〜２０％、最大
で５０％程度向上しているが、しかしながら熱間プレス
用金型に用いられる工具鋼は、非鍛造材（ビレット）と
の接触により、その表面が６００〜６５０℃の高温に昇
温し、加熱軟化による摩耗などの損傷が生じるため、飛
躍的な寿命向上は期待できないのが実状である。2. Description of the Related Art Conventionally, in order to prolong the life of a hot-pressing die, tool improvements such as resistance to high-temperature softening and abrasion resistance of tool steel for a hot-pressing die have been made. With such improvement, the life of the mold is improved by 10 to 20%, and at most about 50%. However, the tool steel used for the hot press mold has a problem that the contact with the non-forged material (a billet) does not occur. As a result, the surface thereof rises to a high temperature of 600 to 650 ° C., causing damage such as abrasion due to heat softening, so that a dramatic improvement in service life cannot be expected.
【０００３】[0003]
【発明が解決しようとする課題】上述した金型摩耗を抑
制するため、例えば特開平６−２３４４８号公報に示さ
れているように、耐高温軟化抵抗性・耐摩耗性に優れた
肉盛材を肉盛溶接した金型が開発されているが、しか
し、肉盛溶接は溶接欠陥が生じやすく、また、多層盛を
すると溶接割れを生じやすいため、肉盛溶接した金型で
は必ずしも型寿命を向上させ得るわけではない。また、
特開平５−２６９５３８号公報に示されているように、
工具鋼の表面にニッケル基またはコバルト基合金をＨＩ
Ｐにより拡散接合し、ニッケル基またはコバルト基合金
を型彫面として金型に供するものであり、その実施例に
挙げる工具鋼にはＪＩＳ規格のＳＫＴ４、ＳＫＤ６１、
ＳＫＤ６２あるいはその改良材を用いると示している。In order to suppress the above-mentioned mold wear, for example, as shown in JP-A-6-23448, a cladding material having excellent resistance to high-temperature softening and wear. However, since overlay welding tends to cause welding defects and multi-layer welding tends to cause welding cracks, the life of the overlay welding mold is not necessarily limited. It cannot be improved. Also,
As shown in JP-A-5-269538,
Nickel-based or cobalt-based alloy on the surface of tool steel
P diffusion bonding is performed, and a nickel-based or cobalt-based alloy is provided to a mold as a die-sculpture surface. Tool steels listed in the examples include JIS-standard SKT4, SKD61,
It is indicated that SKD62 or its improved material is used.
【０００４】しかし、ＳＫＤ６１、ＳＫＤ６２ではＣｒ
含有量が高いため焼入性が良く、ＨＩＰ処理による徐冷
においても４５ＨＲＣ以上の硬さとなり、加工性が悪く
ＨＩＰ処理のままの状態では使用することが出来ない。
実際、この実施例では、焼入焼戻を施しており、再熱処
理を要するため経済性に劣る。本発明は上記課題を解決
するためになされたもので、型彫面材に耐高温軟化抵抗
性・耐摩耗性に優れたコバルト基合金またはニッケル基
合金を用いＨＩＰまま状態での使用が可能なように、母
材となる工具鋼の成分を最適に設計することにより、熱
間プレス用金型の耐高温軟化抵抗性・耐摩耗性の向上を
図り、金型の寿命向上を図ることのできる熱間プレス用
クラッド金型およびその製造方法を提供することを目的
とする。However, in SKD61 and SKD62, Cr is used.
Since the content is high, the hardenability is good, and the hardness becomes 45 HRC or more even in the slow cooling by the HIP treatment, and the workability is poor and the HIP treatment cannot be used as it is.
Actually, in this embodiment, quenching and tempering are performed, and re-heat treatment is required, so that economic efficiency is poor. The present invention has been made in order to solve the above problems, and can be used in a HIP state using a cobalt-based alloy or a nickel-based alloy excellent in high-temperature softening resistance and abrasion resistance as a mold surface material. In this way, by optimally designing the composition of the tool steel as the base material, it is possible to improve the high-temperature softening resistance and abrasion resistance of the hot press die and to improve the life of the die. An object of the present invention is to provide a clad mold for hot pressing and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明である熱間プレス用クラッド金型およびその
製造方法は、 （１）金型の型彫面となる部分をコバルト基合金または
ニッケル基合金とし、重量％で、Ｃ：０．１〜０．５５
％、Ｓｉ：１．２％以下、Ｍｎ：０．３〜２．０％、Ｎ
ｉ：０．３〜２．０％、Ｃｒ：１．０〜４．０％、およ
び、Ｍｏ：０．２〜３．０％、Ｗ：０．４〜６．０％の
１種または２種以上（ＭｏとＷは、１／２Ｗ＋Ｍｏ：
０．２〜３．０％）を含有し、さらに、Ｖ：０．０５〜
０．７％、Ｎｂ：０．０１〜０．１５％の１種または２
種以上を含有し、残部Ｆｅおよび不可避的不純物とから
なる溶製あるいは粉末製熱間工具鋼を金型母材とし、こ
れら型彫面材と母材をＨＩＰ（熱間静水圧圧縮）により
クラッド化し、ＨＩＰ処理したままの状態で使用するこ
とを特徴とする熱間プレス用クラッド金型。In order to achieve the above object, a clad mold for hot pressing and a method of manufacturing the same according to the present invention are described as follows. Nickel-based alloy, C: 0.1-0.55% by weight
%, Si: 1.2% or less, Mn: 0.3 to 2.0%, N
i: 0.3 to 2.0%, Cr: 1.0 to 4.0%, Mo: 0.2 to 3.0%, W: 0.4 to 6.0%, or 2 or more Or more (Mo and W are 1 / 2W + Mo:
0.2-3.0%), and V: 0.05-
0.7%, Nb: one or two of 0.01 to 0.15%
A molten or powdered hot work tool steel containing at least one seed and the balance of Fe and unavoidable impurities is used as a mold base material, and these mold surface materials and the base material are clad by HIP (Hot Isostatic Pressing). A clad mold for hot pressing, characterized in that the clad mold is used as it is after being HIPed.
【０００６】（２）金型の型彫面となる部分をコバルト
基合金またはニッケル基合金とし、重量％で、Ｃ：０．
１〜０．５５％、Ｓｉ：１．２％以下、Ｍｎ：０．３〜
２．０％、Ｎｉ：０．３〜２．０％、Ｃｒ：１．０〜
４．０％、および、Ｍｏ：０．２〜３．０％、Ｗ：０．
４〜６．０％、または２種以上（ＭｏとＷは、１／２Ｗ
＋Ｍｏ：０．２〜３．０％）を含有し、さらに、Ｖ：
０．０５〜０．７％、Ｎｂ：０．０１〜０．１５％の１
種または２種以上と、Ｃｏ：０．２〜３．０％を含有
し、残部Ｆｅおよび不可避的不純物とからなる溶製ある
いは粉末製熱間工具鋼を金型母材とし、これを型彫面材
と母材をＨＩＰ（熱間静水圧圧縮）によりクラッド化
し、ＨＩＰ処理したままの状態で使用することを特徴と
する熱間プレス用クラッド金型。[0006] (2) The die surface of the mold is made of a cobalt-based alloy or a nickel-based alloy.
1 to 0.55%, Si: 1.2% or less, Mn: 0.3 to
2.0%, Ni: 0.3 to 2.0%, Cr: 1.0 to
4.0%, Mo: 0.2-3.0%, W: 0.
4 to 6.0%, or two or more (Mo and W are 1 / 2W
+ Mo: 0.2 to 3.0%).
0.05 to 0.7%, Nb: 1 of 0.01 to 0.15%
A molten or powdered hot tool steel containing one or more kinds and Co: 0.2-3.0%, the balance being Fe and unavoidable impurities is used as a mold base material, and this is engraved. A clad mold for hot pressing, characterized in that a face material and a base material are clad by HIP (Hot Isostatic Pressing) and used as they are after HIP treatment.
【０００７】（３）前記（１）または（２）に記載の型
彫面材と母材をクラッドする際、型彫面材は金型の表面
部分、すなわち摩耗による損傷が激しい部位に相当する
部分とし、それよりも内部、すなわち金型の凹部は母材
部分となるように型彫面材の厚さを設計することを特徴
とする熱間プレス用クラッド金型の製造方法にある。(3) When cladding the die-sculpture material and the base material described in the above (1) or (2), the die-sculpture material corresponds to the surface portion of the mold, that is, a portion that is severely damaged by wear. The method for manufacturing a clad mold for hot pressing is characterized in that the thickness of the die-sculpture material is designed so as to be a part and the inner part, that is, the concave part of the mold becomes a base material part.
【０００８】[0008]
【発明の実施の形態】以下、本発明における金型母材の
各種成分の限定理由を説明する。 Ｃ：０．１〜０．５５％ Ｃは、焼入性、高温硬さの維持に必要な元素であり、ま
た、Ｃｒ，Ｖ，Ｍｏ，Ｗ，Ｎｂ等と結合し炭化物を形成
し、硬さ、結晶粒の微細化効果、耐摩耗性等を得るため
に必要な元素である。０．１％未満であると金型として
最低限の硬さが得られず、また、０．５５％を超えると
過度の炭化物の析出をまねき靱性を劣化させ、さらに、
ＨＩＰによる高温加熱−徐冷後においてもＨＲＣ４５を
超える硬さになり切削等の機械加工が困難になるため、
本発明の特徴であるＨＩＰ処理のままの利用が可能とな
る。よって、Ｃの成分範囲は０．１〜０．５５％とし
た。BEST MODE FOR CARRYING OUT THE INVENTION The reasons for limiting various components of a mold base material in the present invention will be described below. C: 0.1 to 0.55% C is an element necessary for maintaining hardenability and high-temperature hardness, and combines with Cr, V, Mo, W, Nb and the like to form carbides, It is an element necessary for obtaining a crystal grain refining effect, abrasion resistance and the like. If it is less than 0.1%, a minimum hardness as a mold cannot be obtained, and if it exceeds 0.55%, excessive precipitation of carbides is caused to deteriorate toughness.
Even after high-temperature heating and slow cooling by HIP, the hardness exceeds HRC45 and machining such as cutting becomes difficult.
It is possible to use the HIP processing which is a feature of the present invention as it is. Therefore, the component range of C is set to 0.1 to 0.55%.
【０００９】Ｓｉ：１．２％以下 Ｓｉは、マトリックス中に固溶しマトリックス強度を高
めるとともに脱酸の効果があるが、１．２％を超えて添
加すると靱性が劣化するため、その添加量は１．２％以
下とした。 Ｍｎ：０．３〜２．０％ Ｍｎは、焼入性を向上させ金型母材に必要な硬さを得る
ために必要な元素であるが、０．３％未満であるとその
効果は少なく、２．０％を超えるとその効果は飽和する
ため、Ｍｎは０．３〜２．０％とした。Si: 1.2% or less Si dissolves in the matrix to increase matrix strength and has an effect of deoxidation. However, if added over 1.2%, toughness deteriorates. Was set to 1.2% or less. Mn: 0.3 to 2.0% Mn is an element necessary for improving the hardenability and obtaining the hardness required for the mold base material. Since the effect is saturated when it is small and exceeds 2.0%, Mn is set to 0.3 to 2.0%.
【００１０】Ｃｒ：１．０〜４．０％ Ｃｒは、焼入性を向上させるとともにＣと結合して硬い
炭化物を形成し耐摩耗性に寄与する元素である。１．０
％未満であると上記効果が得られず、４．０％を超える
と高温加熱−徐冷後においてもＨＲＣ４５を超える硬さ
になり、ＨＩＰ処理のままの利用が不可能となる。よっ
て、Ｃｒは１．０〜４．０％とした。 Ｖ：０．０５〜０．７％ Ｖは、固溶しにくい炭化物を形成し、耐摩耗性や耐軟化
抵抗性を高める元素である。耐摩耗性向上を得るために
は、少なくとも０．０５％が必要であり、０．７％を超
えて添加すると靱性が低下するので、Ｖは０．０５〜
０．７％とした。Cr: 1.0 to 4.0% Cr is an element that improves hardenability and combines with C to form a hard carbide and contributes to wear resistance. 1.0
%, The above effect cannot be obtained. If it exceeds 4.0%, the hardness exceeds HRC45 even after high-temperature heating and slow cooling, making it impossible to use the HIP treatment as it is. Therefore, Cr was set to 1.0 to 4.0%. V: 0.05 to 0.7% V is an element that forms a carbide that hardly forms a solid solution and improves wear resistance and softening resistance. In order to obtain an improvement in wear resistance, at least 0.05% is necessary, and if added over 0.7%, the toughness is reduced.
0.7%.
【００１１】Ｎｂ：０．０１〜０．１５％ Ｎｂは、靱性を向上させるために添加される。Ｎｂは安
定な炭化物を形成し、結晶粒の粗大化を阻止するが、
０．０１％未満ではその効果が現れず、０．１５％を超
えると焼戻時の軟化抵抗の低下や靱性の劣化をもたら
す。よって、Ｎｂの成分範囲は０．０１〜０．１５％と
した。 Ｎｉ：０．３〜２．０％ Ｎｉは、マトリックス自体の靱性を高める元素であり、
少なくとも０．３％は必要であるが、２．０％を超えて
添加すると、その効果は飽和するため、Ｎｉは０．３〜
２．０％とした。Nb: 0.01 to 0.15% Nb is added to improve toughness. Nb forms stable carbides and prevents coarsening of crystal grains,
If it is less than 0.01%, the effect is not exhibited, and if it exceeds 0.15%, the softening resistance at the time of tempering is reduced and the toughness is deteriorated. Therefore, the component range of Nb is set to 0.01 to 0.15%. Ni: 0.3 to 2.0% Ni is an element that enhances the toughness of the matrix itself,
At least 0.3% is necessary, but if added over 2.0%, the effect is saturated, so that Ni should be 0.3 to 0.3%.
2.0%.
【００１２】Ｃｏ：０．２〜３．０％ Ｃｏは、高温での炭化物凝集粗大化を抑制し、特に耐軟
化抵抗製に有効な元素である。これらの効果を得るため
には、少なくとも０．２％必要であり、３．０％を超え
て添加すると靱性が低下するため、Ｃｏは０．２〜３．
０％とした。 Ｍｏ：０．２〜３．０％、Ｗ：０．４〜６．０％の１種
または２種（２種の場合、１／２Ｗ＋Ｍｏ：０．２〜
３．０％） ＭｏおよびＷは、共に微細な炭化物を形成し、耐摩耗性
や耐軟化抵抗性を改善する元素である。その効果はＭｏ
の方がＷよりも２倍強く、同じ効果を得るのにＷはＭｏ
の２倍必要である。両元素は、あまり多く添加すると靱
性や耐ヒートチェック性を劣化させるので、上限をＭｏ
当量（１／２Ｗ＋Ｍｏ）で、３％とした。また、上記効
果を得るためには少なくともＭｏ当量で０．２％が必要
である。よって、Ｍｏ当量（１／２Ｗ＋Ｍｏ）は０．２
〜３．０％とした。Co: 0.2 to 3.0% Co is an element which suppresses carbide agglomeration at high temperatures and is particularly effective for softening resistance. To obtain these effects, at least 0.2% is required, and if added over 3.0%, the toughness is reduced.
0%. Mo: 0.2 to 3.0%, W: 0.4 to 6.0%, 1 or 2 types (1/2 W + Mo: 0.2 to 2 types)
(3.0%) Mo and W are both elements that form fine carbides and improve wear resistance and softening resistance. The effect is Mo
Is twice as strong as W and W is Mo to achieve the same effect.
Is twice as much as If both elements are added in too large amounts, the toughness and the heat check resistance are deteriorated.
The equivalent (1 / 2W + Mo) was 3%. Further, in order to obtain the above effects, at least Mo equivalent is required to be 0.2%. Therefore, Mo equivalent (1 / 2W + Mo) is 0.2
３3.0%.
【００１３】以下、本発明における熱間プレス用クラッ
ド金型およびその製造方法を説明する。図１は本発明の
金型の母材となる溶製あるいは粉末製工具鋼と、型彫面
材となる耐高温軟化抵抗性・耐摩耗性に優れたコバルト
基合金またはニッケル基合金とをＨＩＰにより拡散接合
させるための方法を示す図であり、同図において、３は
軟鋼板によるＨＩＰ用の缶である。１は金型の母材を構
成する溶製あるいは粉末製工具鋼であり、ＨＩＰ用缶３
内に二枚の溶製あるいは粉末製工具鋼１を設置し、その
間にコバルト基合金またはニッケル基合金粉末材２を充
填する。Hereinafter, a clad mold for hot pressing and a method of manufacturing the same according to the present invention will be described. FIG. 1 shows a HIP of a molten or powdered tool steel as a base material of a mold of the present invention and a cobalt-based alloy or a nickel-based alloy which is excellent in high-temperature softening resistance and abrasion resistance as a die surface material. FIG. 3 is a view showing a method for performing diffusion bonding by HIP, in which 3 is a can for HIP using a mild steel plate. Reference numeral 1 denotes a molten or powdered tool steel constituting a base material of a mold.
Inside, two molten or powdered tool steels 1 are installed, and between them, a cobalt-based alloy or nickel-based alloy powder material 2 is filled.
【００１４】このとき、最終工程で分割したときに、型
彫面材が摩耗による損傷が激しくなる部位にのみ相当す
るように、粉末材２を充填する幅、すなわち、二枚の溶
製あるいは粉末製工具鋼１の隙間を設置しておく。充填
後、脱気缶４より真空加熱脱気した後、脱気管４を封
じ、ＨＩＰにより加熱加圧する。ＨＩＰは、加圧１００
０〜２０００ｋｇｆ／ｃｍ2 、加熱温度１０００〜１２
００℃の条件で行い、その後徐冷を行う。ＨＩＰ処理
後、粉末材２は充分に緻密化し、且つ溶製あるいは粉末
製工具鋼１と拡散接合される。その後、ＨＩＰ用缶３を
機械加工によって除去する。At this time, when divided in the final step, the width of filling the powder material 2, that is, two pieces of the melted or powdered material, so that the die face material corresponds only to the portion where the damage due to abrasion becomes severe. A gap between the tool steel 1 is installed. After filling, after degassing by vacuum heating from the degassing can 4, the degassing tube 4 is sealed and heated and pressurized by HIP. HIP is pressurized 100
0 to 2000 kgf / cm 2 , heating temperature 1000 to 12
It is performed under the condition of 00 ° C., and thereafter, it is gradually cooled. After the HIP treatment, the powder material 2 is sufficiently densified and is diffusion-bonded to the molten or powdered tool steel 1. Thereafter, the HIP can 3 is removed by machining.
【００１５】図２はＨＩＰ処理後、ＨＩＰ用缶３を除去
した状態を示す。図中の粉末材の中央部分を放電加工に
より切断を行うことにより、図３に示すような母材を溶
製あるいは粉末製工具鋼とし、型彫面側に耐高温軟化抵
抗性・耐摩耗性に優れたコバルト基合金またはニッケル
基合金をクラッド化した熱間プレス用金型が二つ製造さ
れ、コバルト基合金またはニッケル基合金粉末材２の表
面に放電加工や切削加工によって型彫りを行ない鍛造に
供する。FIG. 2 shows a state in which the HIP can 3 has been removed after the HIP processing. By cutting the central part of the powder material in the figure by electric discharge machining, the base material as shown in FIG. 3 is made of molten or powdered tool steel, and the high-temperature softening resistance and abrasion resistance are formed on the mold surface. Of hot-pressing dies with excellent cobalt-based alloys or nickel-based alloys clad in good quality. The surface of the cobalt-based alloy or nickel-based alloy powder material 2 is engraved by electric discharge machining or cutting to forging. To serve.
【００１６】[0016]
【実施例】以下、本発明の特徴を実施例を挙げて説明す
る。表１に供試金型の化学成分を示す。発明金型Ａは本
発明における製造方法により、型彫面にコバルト基合金
の１つであるステライトＮｏ６、母材に熱間工具鋼の溶
製材を用いて製造されている。また、比較金型Ｂはクラ
ッド金型ではなく焼入焼戻しした単体の溶製工具鋼ＳＫ
Ｄ６１であり、従来熱間プレス金型に用いられている工
具鋼である。表２は発明金型ＡのＨＩＰ処理後における
硬さを示したものであるが、同表から本発明金型はＨＩ
Ｐままでの硬さが熱間プレス金型として使用するに十分
なＨＲＣ３８以上であり、且つ型彫りにおける切削が容
易に行うことができるＨＲＣ４５以下を得ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be described below with reference to embodiments. Table 1 shows the chemical components of the test mold. Inventive mold A is manufactured by the manufacturing method of the present invention, using Stellite No. 6, which is one of the cobalt-based alloys, as the die-sculpture surface, and ingot of hot tool steel as the base metal. The comparative mold B is not a clad mold but a quenched and tempered single-piece ingot tool steel SK.
D61, a tool steel conventionally used for hot press dies. Table 2 shows the hardness of the invention mold A after the HIP treatment.
The hardness as P is not less than HRC38 which is sufficient to be used as a hot press die, and not more than HRC45 which enables easy cutting in engraving.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】つぎに、図４にＨＩＰまま状態の発明金型
Ａの型彫面となる粉末材部分と比較金型Ｂについての高
温軟化特性を示す。試験には、それぞれの部位から５ｍ
ｍ×５ｍｍ×２０ｍｍの試験片を採取し、６００℃で各
時間保持後空冷したときの硬さを測定して評価したとこ
ろ、発明金型Ａの型彫面であるステライトＮｏ６は、３
００時間の保持後においても硬さ低下はなく、比較金型
Ｂよりも耐高温軟化抵抗性が優れていることは明らかで
あり、発明金型Ａは金型表面が６００℃以上に昇温加熱
される熱間プレス金型に使用しても、高温軟化による型
面のヘタリや摩耗による損傷が、従来金型と比較して抑
制されることは明らかである。Next, FIG. 4 shows the high-temperature softening characteristics of the powder material portion serving as the die-sculpture surface of the inventive mold A in the HIP state and the comparative mold B. For the test, 5m from each part
A test piece of mx 5 mm x 20 mm was sampled, held at 600 ° C for each hour, and then measured for hardness when air-cooled.
There is no decrease in hardness even after holding for 00 hours, and it is clear that the high-temperature softening resistance is superior to that of the comparative mold B. Inventive mold A has a mold surface heated to 600 ° C. or higher. It is apparent that even when used in a hot press mold to be used, settling of the mold surface due to high temperature softening and damage due to wear are suppressed as compared with the conventional mold.
【００２０】また、図５は発明金型Ａの母材および比較
金型Ｂ（ＳＫＤ６１）の各部位からＪＩＳ３号シャルピ
ー試験片を採取し、衝撃試験を行った結果であるが、発
明金型Ａの母材工具鋼の靱性はいずれの試験温度におい
ても比較金型であるＳＫＤ６１の靱性の同等以上であ
り、金型母材の靱性としては十分な靱性を有している。FIG. 5 shows the results obtained by collecting a JIS No. 3 Charpy test piece from each part of the base material of the invention mold A and the comparative mold B (SKD61) and performing an impact test. The toughness of the base material tool steel is equal to or higher than that of the comparative die SKD61 at any test temperature, and the die base material has sufficient toughness.
【００２１】このように、本発明における型彫面材に用
いる耐高温軟化抵抗性・耐摩耗性に優れたコバルト基合
金またはニッケル基合金は、金型の凹部はＨＩＰによる
高温加熱−徐冷後においても十分な靱性をもつ母材部分
となるように型彫面材の厚さを設計するため、金型の凹
部からの大割れを抑制することが可能であり、さらなる
寿命向上が期待できる。このように、従来の方法に比較
して、本発明はＨＩＰ処理ままの状態で使用可能なよう
に母材工具鋼の成分設計がなされている点で異なり、ま
た、型彫面材の厚さを設計することにより、寿命向上の
改善がなされてるものである。As described above, the cobalt-based alloy or nickel-based alloy excellent in high-temperature softening resistance and abrasion resistance used in the die-sculpture material of the present invention has a concave portion of the mold after high-temperature heating and slow cooling by HIP. In this case, since the thickness of the die face material is designed to be a base material part having sufficient toughness, it is possible to suppress a large crack from a concave portion of the mold, and further improvement in the life can be expected. As described above, the present invention is different from the conventional method in that the composition of the base material tool steel is designed so that it can be used as it is in the HIP process. Is designed to improve the service life.
【００２２】[0022]
【発明の効果】以上述べたように、本発明により、金型
寿命向上と金型作製費用削減の両観点から、非常に経済
性に優れた熱間プレス用金型の製造方法を提供すること
が可能である。また、実施例に掲載した発明金型のよう
に、型彫面、母材ともに材質選定をうまく行うことによ
り、ＨＩＰ処理後に焼入焼戻等の熱処理を行わずＨＩＰ
ままで使用することが可能な熱間プレス金型を製造する
ことが可能であり、熱処理工程を省くことにより金型製
造費用の更なる削減と短納期化が可能となる。As described above, according to the present invention, there is provided a method of manufacturing a die for hot press which is very economical in view of both improvement of die life and reduction of die manufacturing cost. Is possible. Also, as in the invention molds described in the examples, by appropriately selecting the material for both the engraved surface and the base material, the HIP is performed without heat treatment such as quenching and tempering after the HIP treatment.
It is possible to manufacture a hot press die that can be used as it is, and it is possible to further reduce the die manufacturing cost and shorten the delivery time by omitting the heat treatment step.
【図１】本発明による工具鋼と粉末材を拡散接合する方
法の説明図である。FIG. 1 is an explanatory diagram of a method for diffusion bonding tool steel and powder material according to the present invention.
【図２】ＨＩＰ処理後、ＨＩＰ用缶を除去した状態を示
す図である。FIG. 2 is a view showing a state in which a HIP can has been removed after HIP processing.
【図３】金型の母材となる工具鋼と、型彫面材となる耐
高温軟化抵抗性・耐摩耗性に優れたコバルト基合金とを
ＨＩＰにより拡散接合させた熱間プレス用金型の斜視図
である。[FIG. 3] A hot press die in which tool steel as a base material of the die and a cobalt-based alloy as a die surface material which are excellent in high temperature softening resistance and wear resistance are diffusion bonded by HIP. It is a perspective view of.
【図４】本発明金型Ａの型彫面となるコバルト基合金部
分と比較金型Ｂについての高温軟化特性を示す図であ
る。FIG. 4 is a view showing the high-temperature softening characteristics of a cobalt-based alloy portion serving as a die engraving surface of a mold A of the present invention and a comparative mold B.
【図５】本発明金型Ａの母材および比較金型Ｂ（ＳＫＤ
６１）のシャルピー衝撃特性を示す図である。FIG. 5 shows a base material of a mold A of the present invention and a comparative mold B (SKD).
FIG. 61 is a diagram showing the Charpy impact characteristics of No. 61).
１ 溶製あるいは粉末製工具鋼 ２ コバルト基合金粉末材 ３ ＨＩＰ用缶 ４ 脱気管 DESCRIPTION OF SYMBOLS 1 Melted or powder tool steel 2 Cobalt-based alloy powder material 3 HIP can 4 Degassing pipe
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ３２Ｂ 15/01 Ｃ２２Ｃ 19/00 Ｐ Ｃ２２Ｃ 19/00 38/00 ３０１Ｈ 38/00 ３０１ ３０２Ｅ ３０２ 38/48 38/48 38/52 38/52 38/58 38/58 Ｂ２２Ｆ 5/00 Ｆ (72)発明者 大井 茂博 兵庫県姫路市飾磨区中島字一文字3007番地 山陽特殊製鋼株式会社内 (72)発明者 馬野 則之 兵庫県姫路市飾磨区中島字一文字3007番地 山陽特殊製鋼株式会社内 Ｆターム(参考） 4E050 JA01 JA08 JB07 JC02 JD07 4E067 AA01 AA02 AA22 AB01 AB02 BA06 DB01 DC04 EA08 EB11 EC02 4F100 AA37B AB01B AB11B AB13B AB14B AB15A AB16A AB16B AB20B AB31A BA02 DE01B EJ17 GB51 JJ02 JK09 JL02 4K018 AA08 AA10 EA13 KA18 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B32B 15/01 C22C 19/00 PC22C 19/00 38/00 301H 38/00 301 302E 302 38/48 38 / 48 38/52 38/52 38/58 38/58 B22F 5/00 F (72) Inventor Shigehiro Oi 3007 one character Nakajima character in Shima, Himeji City, Hyogo Prefecture Sanyo Special Steel Co., Ltd. (72) Inventor Nori Mano No. 3007 Nakajima character, Himeji City, Hyogo Prefecture, Nakajima character Sanyo Special Steel Co., Ltd. AB20B AB31A BA02 DE01B EJ17 GB51 JJ02 JK09 JL02 4K018 AA08 AA10 EA13 KA18
Claims (3)
金またはニッケル基合金とし、重量％で、 Ｃ：０．１〜０．５５％、 Ｓｉ：１．２％以下、 Ｍｎ：０．３〜２．０％、 Ｎｉ：０．３〜２．０％、 Ｃｒ：１．０〜４．０％、 および、Ｍｏ：０．２〜３．０％、 Ｗ：０．４〜６．０％ の１種または２種以上（ＭｏとＷは、１／２Ｗ＋Ｍｏ：
０．２〜３．０％）を含有し、さらに、 Ｖ：０．０５〜０．７％、 Ｎｂ：０．０１〜０．１５％ の１種または２種以上を含有し、残部Ｆｅおよび不可避
的不純物とからなる溶製あるいは粉末製熱間工具鋼を金
型母材とし、これら型彫面材と母材をＨＩＰ（熱間静水
圧圧縮）によりクラッド化し、ＨＩＰ処理したままの状
態で使用することを特徴とする熱間プレス用クラッド金
型。1. A die forming surface of a mold is made of a cobalt-based alloy or a nickel-based alloy, and is, by weight%, C: 0.1 to 0.55%, Si: 1.2% or less, and Mn: 0 0.3 to 2.0%, Ni: 0.3 to 2.0%, Cr: 1.0 to 4.0%, and Mo: 0.2 to 3.0%, W: 0.4 to 6 2.0% or more (Mo and W are 1 / 2W + Mo:
0.2 to 3.0%), and further contains one or more of V: 0.05 to 0.7% and Nb: 0.01 to 0.15%, with the balance being Fe and A molten or powdered hot work tool steel consisting of unavoidable impurities is used as a mold base material, and these mold surface materials and the base material are clad by HIP (Hot Isostatic Pressing), and the HIP treatment is performed. A clad mold for hot pressing, characterized in that it is used.
金またはニッケル基合金とし、重量％で、 Ｃ：０．１〜０．５５％、 Ｓｉ：１．２％以下、 Ｍｎ：０．３〜２．０％、 Ｎｉ：０．３〜２．０％、 Ｃｒ：１．０〜４．０％、 および、Ｍｏ：０．２〜３．０％、 Ｗ：０．４〜６．０％ の１種または２種以上（ＭｏとＷは、１／２Ｗ＋Ｍｏ：
０．２〜３．０％）を含有し、さらに、 Ｖ：０．０５〜０．７％、 Ｎｂ：０．０１〜０．１５％ の１種または２種以上と、Ｃｏ：０．２〜３．０％を含
有し、残部Ｆｅおよび不可避的不純物とからなる溶製あ
るいは粉末製熱間工具鋼を金型母材とし、これを型彫面
材と母材をＨＩＰ（熱間静水圧圧縮）によりクラッド化
し、ＨＩＰ処理したままの状態で使用することを特徴と
する熱間プレス用クラッド金型。2. A part to be a die-sculpture surface of a mold is made of a cobalt-based alloy or a nickel-based alloy, and in terms of% by weight, C: 0.1 to 0.55%, Si: 1.2% or less, Mn: 0 0.3 to 2.0%, Ni: 0.3 to 2.0%, Cr: 1.0 to 4.0%, and Mo: 0.2 to 3.0%, W: 0.4 to 6 2.0% or more (Mo and W are 1 / 2W + Mo:
0.2 to 3.0%), one or more of V: 0.05 to 0.7%, Nb: 0.01 to 0.15%, and Co: 0.2 A molten or powdered hot tool steel containing up to 3.0% and the balance of Fe and unavoidable impurities is used as a mold base material. A clad mold for hot pressing, characterized in that it is clad by compression) and used as it is after HIP treatment.
材をクラッドする際、型彫面材は金型の表面部分、すな
わち摩耗による損傷が激しい部位に相当する部分とし、
それよりも内部、すなわち金型の凹部は母材部分となる
ように型彫面材の厚さを設計することを特徴とする熱間
プレス用クラッド金型の製造方法。3. The cladding of the die-sculpture material and the base material according to claim 1 or 2, wherein the die-sculpture material is a surface part of the mold, that is, a part corresponding to a part severely damaged by abrasion,
A method for manufacturing a clad mold for hot pressing, characterized in that the thickness of the die face material is designed so that the inside, that is, the concave portion of the mold becomes a base material portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01079799A JP3761733B2 (en) | 1999-01-19 | 1999-01-19 | Clad mold for hot pressing and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01079799A JP3761733B2 (en) | 1999-01-19 | 1999-01-19 | Clad mold for hot pressing and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000202548A true JP2000202548A (en) | 2000-07-25 |
| JP3761733B2 JP3761733B2 (en) | 2006-03-29 |
Family
ID=11760343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01079799A Expired - Fee Related JP3761733B2 (en) | 1999-01-19 | 1999-01-19 | Clad mold for hot pressing and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3761733B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6341557B1 (en) * | 1999-09-09 | 2002-01-29 | Universal Engraving, Inc. | Non-ferrous/ferromatic laminated graphic arts impression dies and method of producing same |
| CN103331654A (en) * | 2013-07-05 | 2013-10-02 | 山西太钢不锈钢股份有限公司 | Method for grinding disc scissors |
| CN110295332A (en) * | 2019-07-05 | 2019-10-01 | 天津钢研海德科技有限公司 | A kind of pre- hard mold steel of the high mirror surface of high tenacity and its manufacturing process |
| CN115181901A (en) * | 2022-04-07 | 2022-10-14 | 燕山大学 | High-strength-toughness hard low-temperature bainite hot-work die steel and preparation method thereof |
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| JPS63203221A (en) * | 1987-02-19 | 1988-08-23 | Hitachi Metals Ltd | Metallic die |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6341557B1 (en) * | 1999-09-09 | 2002-01-29 | Universal Engraving, Inc. | Non-ferrous/ferromatic laminated graphic arts impression dies and method of producing same |
| CN103331654A (en) * | 2013-07-05 | 2013-10-02 | 山西太钢不锈钢股份有限公司 | Method for grinding disc scissors |
| CN110295332A (en) * | 2019-07-05 | 2019-10-01 | 天津钢研海德科技有限公司 | A kind of pre- hard mold steel of the high mirror surface of high tenacity and its manufacturing process |
| CN110295332B (en) * | 2019-07-05 | 2020-11-10 | 天津钢研海德科技有限公司 | High-toughness high-mirror-surface pre-hardened die steel and manufacturing process thereof |
| CN115181901A (en) * | 2022-04-07 | 2022-10-14 | 燕山大学 | High-strength-toughness hard low-temperature bainite hot-work die steel and preparation method thereof |
| CN115181901B (en) * | 2022-04-07 | 2023-09-26 | 燕山大学 | High-strength and high-toughness hard low-temperature bainite hot work die steel and preparation method thereof |
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|---|---|
| JP3761733B2 (en) | 2006-03-29 |
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