JP2000246371A - Coated die - Google Patents
Coated dieInfo
- Publication number
- JP2000246371A JP2000246371A JP11047599A JP4759999A JP2000246371A JP 2000246371 A JP2000246371 A JP 2000246371A JP 11047599 A JP11047599 A JP 11047599A JP 4759999 A JP4759999 A JP 4759999A JP 2000246371 A JP2000246371 A JP 2000246371A
- Authority
- JP
- Japan
- Prior art keywords
- nitrogen
- mold
- coating
- carbon film
- die
- 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
- Chemical Vapour Deposition (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非鉄金属の曲げ、
絞り、打ち抜きなどのプレス成形やマグネシウム合金の
チクソ成形に用いられる金型のうち、金型の表面に耐摩
耗性被膜を形成した、被覆金型に関するものである。The present invention relates to the bending of non-ferrous metals,
BACKGROUND OF THE INVENTION The present invention relates to a coating die having a wear-resistant coating formed on the surface of a die, among dies used for press forming such as drawing and punching and thixo forming of a magnesium alloy.
【０００２】[0002]
【従来の技術】金型を用いた非鉄金属部品のプレス加工
や成形加工の高能率化、高精度化の要求を満たすため
に、新しい金型材料が次々と開発されている。このよう
な材料開発の流れの中で、各種金型素材上へのセラミッ
クスコーティング技術は、欠かせない金型製造技術の一
つとなっている。2. Description of the Related Art New mold materials are being developed one after another in order to satisfy the demands for higher efficiency and higher precision in press working and molding of non-ferrous metal parts using molds. In such a flow of material development, ceramic coating technology on various mold materials has become one of the indispensable mold manufacturing technologies.
【０００３】このような金型においては、被成形物の焼
き付きや摩耗が生じ、被成形物の仕上がり状態を悪くす
る問題や、金型自身の摩耗が生じるといった問題が起き
る。このような焼き付きや摩耗を抑えるために、セラミ
ックスコーティング膜の成分として、炭化チタン（Ｔｉ
Ｃ）、窒化チタン（ＴｉＮ）、炭窒化チタン（ＴｉＣ
Ｎ）といったチタン系セラミックスが現在最も広く使わ
れている。[0003] In such a mold, there is a problem in that seizure and wear of the molded object occur, thereby deteriorating the finished state of the molded object, and a problem in that the mold itself is worn. In order to suppress such seizure and wear, titanium carbide (Ti) is used as a component of the ceramic coating film.
C), titanium nitride (TiN), titanium carbonitride (TiC)
N) and other titanium-based ceramics are currently most widely used.
【０００４】しかし、このような膜構造を持った被膜
は、成形される材料（被成形物）が金型の成形面に溶着
し、被成形物の表面状態を悪くするという問題、いわゆ
る「溶着」の抑制効果が不十分であるという欠点があっ
た。この原因は、溶着物と耐摩耗性被膜との間の密着力
が高く、溶着物の成長を招き、結果として溶着物と被成
型物とのかじり等の現象を引き起こしているためである
と考えられる。However, a film having such a film structure has a problem that a material to be molded (molded object) is welded to a molding surface of a mold and deteriorates the surface condition of the molded object, so-called “welding”. Is insufficient. The cause is considered to be that the adhesion between the welded material and the abrasion-resistant coating is high, causing the welded material to grow, and as a result, causing a phenomenon such as galling between the welded material and the molded object. Can be
【０００５】このような被成形物の溶着を防いだり、被
成形物の型離れ抵抗（離型抵抗）を下げる一つの方法と
して、二流化モリブデンなどの層状化合物からなる潤滑
性皮膜を上述の硬質皮膜の上に積層した金型も提案さ
れ、市販されているが、二流化モリブデンなどの層状化
合物は、機械的強度が低いために摩耗しやすく、成形開
始直後には良好な特性を示すものの、潤滑性皮膜の損傷
に伴って溶着防止の効果が失われてしまうという欠点が
あった。As one method of preventing the welding of such a molded article or reducing the mold release resistance (mold release resistance) of the molded article, a lubricating film made of a layered compound such as molybdenum disulfide is coated with the above-mentioned hard coating. A mold laminated on the film has also been proposed and marketed, but a layered compound such as difluidized molybdenum tends to wear due to its low mechanical strength, and exhibits good properties immediately after the start of molding. There is a disadvantage that the effect of preventing welding is lost with the damage of the lubricating film.
【０００６】またダイヤモンドあるいはダイヤモンド状
炭素からなる硬質被膜を被覆した金型も提案され、一部
実用化が図られているが、金型母材との密着強度が低か
ったり不安定であったりするために剥離しやすく、性能
が不安定であるという問題があった。A mold coated with a hard film made of diamond or diamond-like carbon has also been proposed and partially put to practical use, but the adhesion strength to the mold base material is low or unstable. Therefore, there was a problem that the film was easily peeled off and the performance was unstable.
【０００７】このように、従来の金型材料、被覆膜材料
では、これらの要求を十分に満足することはできていな
かった。As described above, conventional mold materials and coating film materials have not been able to sufficiently satisfy these requirements.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、かかる従来
の事情に鑑み、セラミックスコーティングの優れた点を
いかしながら、被覆金型の表面への被成形物の溶着を防
ぐと同時に、被成形物との滑りを良くすることができる
画期的な被覆金型を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and at the same time, while preventing the welding of a molded article on the surface of a coating mold while utilizing the advantages of a ceramic coating, the present invention has been made. It is an object of the present invention to provide a revolutionary coated mold capable of improving the sliding with the mold.
【０００９】[0009]
【課題を解決するための手段】本発明の第１の特徴とす
るところは、セラミックス、超硬合金、高速度鋼、プリ
ハードン鋼、あるいはダイス鋼などを基材とした金型の
成形面の全部あるいは一部が窒素を含有する硬質炭素膜
で被覆されていることである。SUMMARY OF THE INVENTION A first feature of the present invention resides in that the entire molding surface of a mold based on ceramics, cemented carbide, high-speed steel, pre-hardened steel, die steel or the like is used. Alternatively, it is partly covered with a hard carbon film containing nitrogen.
【００１０】そしてこの窒素含有硬質炭素膜における炭
素に対する窒素の比率が２原子％以上３０原子％以下で
あること、また不可避不純物の一つとして水素を含んで
いることを第２の特徴としている。The second feature is that the ratio of nitrogen to carbon in the nitrogen-containing hard carbon film is not less than 2 atomic% and not more than 30 atomic%, and that hydrogen is included as one of the inevitable impurities.
【００１１】また、この窒素含有硬質炭素膜が基材上に
直接被覆された単層構造、あるいは、基材に隣接して形
成された下地層の上に形成され、この下地層の成分が周
期律表のＩＶａ、Ｖa、ＶＩａ族元素の金属、炭化物、
窒化物、炭窒化物、並びにＡｌ、ＡｌＮ、Ｓｉ、Ｓｉ
Ｃ、Ｓｉ3Ｎ4、Ｂ4Ｃ、ＢＮ及びこれらの化合物、混合
物、多層構造物からなることを特徴とする第３の特徴と
している。Further, the nitrogen-containing hard carbon film is formed on a single-layer structure in which the substrate is directly coated on a base material or on a base layer formed adjacent to the base material. Metals, carbides of elements IVa, Va, VIa of the table
Nitride, carbonitride, and Al, AlN, Si, Si
A third feature is that it is composed of C, Si 3 N 4 , B 4 C, BN, a compound thereof, a mixture, and a multilayer structure.
【００１２】このような被覆金型の用途としては、最も
一般的な鉄系合金の成型用としてはもちろんのこと、と
りわけアルミ合金や銅合金、はんだ被覆されたリードフ
レームのような軟質かつ焼き付きやすい材料の成形加工
に適しており、これは別の特徴の一つである。The use of such a coating mold is not only for molding of the most common iron-based alloy, but also for soft and easy-to-seize such as an aluminum alloy, a copper alloy, and a lead frame coated with solder. Suitable for forming materials, which is another characteristic.
【００１３】成形加工の種類としては、非鉄金属の曲
げ、絞り、打ち抜きなどのプレス成形や、マグネシウム
合金のチクソ成形に用いられる金型など、全ての成形加
工が対象となる。The types of molding include all types of molding such as press molding such as bending, drawing, and punching of non-ferrous metals, and dies used for thixo molding of magnesium alloys.
【００１４】[0014]
【作用】既に説明したように、金型においては、被成形
物と接触する部位における摩擦摩耗特性が、金型の性能
を左右する重要な因子となっている。As described above, in the mold, the friction and wear characteristics of the portion in contact with the molding are important factors influencing the performance of the mold.
【００１５】本発明者らは、各種セラミックスの持つ多
種多様な特徴を活かすことのできる被膜を検討する中か
ら、金型のうちの成形に関与する部位、則ち被成形物と
擦れる金型成形面のうちの全部あるいは一部が、窒素を
含有する硬質炭素膜で被覆されていれば、成形加工中の
溶着現象をなくすことができることを見いだした。ま
た、従来から用いられていたダイヤモンドやダイヤモン
ド状炭素膜におこりやすかった剥離現象もなくすことが
できることも見いだした。この理由は、窒素を添加した
ことで、ダイヤモンド状炭素膜に近い材質と構造を持っ
た硬質炭素膜が、圧縮内部応力の低減、膜自身の耐摩耗
性の向上、下地層との親和性（密着性）向上などの面で
改善され、剥離しにくく耐摩耗性も向上したためである
と考えられる。The present inventors have been studying a coating film that can make use of the various characteristics of various ceramics, and have found that a portion of the mold that is involved in molding, that is, a mold that rubs against the molded object. It has been found that if all or part of the surface is coated with a nitrogen-containing hard carbon film, the welding phenomenon during molding can be eliminated. It has also been found that it is possible to eliminate the peeling phenomenon that tends to occur in the conventionally used diamond or diamond-like carbon film. The reason for this is that the addition of nitrogen allows a hard carbon film having a material and structure close to that of a diamond-like carbon film to reduce the internal compressive stress, improve the wear resistance of the film itself, and improve the affinity with the underlayer ( It is considered that this is because the adhesiveness was improved in terms of improvement and the abrasion resistance was improved.
【００１６】本発明者らは硬質炭素膜への窒素添加が膜
の内部応力に与える影響を調査した結果、窒素を含まな
いダイヤモンド状炭素膜の残留圧縮応力を１とした時
に、炭素に対する窒素の比率を３原子％とした窒素含有
硬質炭素膜では残留圧縮応力が０．８となり、窒素を数
原子％添加することで、硬質炭素膜の残留圧縮応力がめ
ざましく低下することを見いだした。圧縮応力が高すぎ
ると、膜自身が圧壊するだけでなく、成形加工中の外部
応力なども加わって、膜の損壊が促進される傾向にあ
る。従って窒素を添加することが膜の圧縮損壊の抑制に
効果があることが推察される。The present inventors have investigated the effect of the addition of nitrogen to the hard carbon film on the internal stress of the film. As a result, when the residual compressive stress of the diamond-like carbon film containing no nitrogen is set to 1, the ratio of nitrogen to carbon It has been found that the residual compressive stress of the nitrogen-containing hard carbon film having a ratio of 3 atomic% is 0.8, and that the residual compressive stress of the hard carbon film is remarkably reduced by adding several atomic% of nitrogen. If the compressive stress is too high, not only the film itself will be crushed, but also the external stress during the forming process will be applied, and the film tends to be damaged. Therefore, it is presumed that the addition of nitrogen is effective in suppressing the compression damage of the membrane.
【００１７】次に本発明者らは、硬質炭素膜への窒素添
加が膜の耐摩耗性に与える影響を調査した結果、窒素を
含まないダイヤモンド状炭素膜の摩耗量を１とした時
に、炭素に対する窒素の比率を３原子％とした窒素含有
硬質炭素膜では摩耗量が０．６となり、窒素を数原子％
添加することで、硬質炭素膜の耐摩耗性がめざましく向
上することを見いだした。この試験では相手材を軸受け
鋼（ＪＩＳ ＳＵＪ２）の鋼球とし、潤滑油を全く用い
ない条件でのボールオンディスク試験を用いた。このよ
うに耐摩耗性が著しく向上する理由は、一つには窒素添
加による残留圧縮応力の低減にあるものと思われるが、
もう一つは窒化炭素化合物が生成したことが考えられ
る。窒化炭素化合物とは、ダイヤモンドを越える硬質物
質として期待されている新材料であるが、窒化炭素とし
て完全な形で合成された例はない。本発明による窒素含
有硬質炭素膜の膜内部には、わずかな量の窒素しか存在
しないが、ダイヤモンド状炭素のマトリックス中に窒化
炭素の微細粒子が分散した構造を持っている可能性があ
り、この窒化炭素成分が耐摩耗性向上にも好影響を与え
たものと考えられる。Next, the present inventors investigated the effect of addition of nitrogen to the hard carbon film on the wear resistance of the film. As a result, when the wear amount of the diamond-like carbon film containing no nitrogen was set to 1, the carbon content was reduced. In the case of a nitrogen-containing hard carbon film in which the ratio of nitrogen to nitrogen is 3 atomic%, the wear amount is 0.6, and nitrogen is several atomic%.
It has been found that the addition of the compound significantly improves the wear resistance of the hard carbon film. In this test, a partner material was a steel ball of bearing steel (JIS SUJ2), and a ball-on-disk test was performed under the condition that no lubricating oil was used. The reason that the wear resistance is remarkably improved in this way seems to be partly due to the reduction of residual compressive stress due to the addition of nitrogen.
The other is considered that a carbon nitride compound was generated. A carbon nitride compound is a new material expected as a hard substance exceeding diamond, but there is no example of a carbon nitride synthesized in perfect form. Although only a small amount of nitrogen is present inside the nitrogen-containing hard carbon film according to the present invention, it is possible that the nitrogen-containing hard carbon film has a structure in which fine particles of carbon nitride are dispersed in a matrix of diamond-like carbon. It is considered that the carbon nitride component also had a favorable effect on the improvement in wear resistance.
【００１８】またダイヤモンド状炭素膜に窒素を添加す
ることが、膜の密着強度にも好影響を与えることが本発
明者らによって確認された。本発明では、窒素含有硬質
炭素膜を金型母材表面上に直接形成しても、優れた効果
が得られる。The present inventors have also confirmed that the addition of nitrogen to the diamond-like carbon film has a favorable effect on the adhesion strength of the film. In the present invention, excellent effects can be obtained even if the nitrogen-containing hard carbon film is formed directly on the surface of the mold base material.
【００１９】本発明のもう一つの特徴の一つに、周期律
表のＩＶａ、Ｖａ、ＶＩａ族元素の金属、炭化物、窒化
物、炭窒化物、並びに、Ａｌ、ＡｌＮ、Ｓｉ、ＳｉＣ、
Ｓｉ3Ｎ４、Ｂ4Ｃ、ＢＮ及びこれらの化合物、混合物、
多層構造物からなる一つ以上の中間層を介して、窒素含
有硬質炭素膜を最外層に形成するという多層構造物とし
たことが挙げられるが、ここで用いられている周期律表
のＩＶａ、Ｖａ、ＶＩａ族元素やＡｌ、Ｓｉ、Ｂといっ
た元素は、容易に窒素や炭素と反応することが知られて
いる。Another feature of the present invention is that metals, carbides, nitrides, carbonitrides, and Al, AlN, Si, SiC, of the elements IVa, Va, and VIa of the periodic table.
Si 3 N 4, B 4 C, BN and their compounds, mixtures,
A multilayer structure in which a nitrogen-containing hard carbon film is formed as an outermost layer through one or more intermediate layers made of a multilayer structure is mentioned. It is known that elements such as Va, VIa group elements, Al, Si, and B easily react with nitrogen and carbon.
【００２０】本発明者らは共同研究者らとともに、この
炭素と反応することを利用して、ダイヤモンドあるいは
ダイヤモンド状炭素膜を基材上に形成する際に、周期律
表のＩＶａ、Ｖａ、ＶＩａ族元素やＡｌ、Ｓｉ、Ｂとい
った元素そのもの、あるいはこれらの炭化物、窒化物、
炭窒化物などを利用することを提案している（例えば特
開昭５７−１５８３７２号公報、特開昭５８−１２６９
７２号公報、特開昭６１−１０４０７８号公報、特開昭
６２−１１６７６７号公報など）。しかしこれらの提案
では、いずれも最外層がダイヤモンドまたは硬質炭素膜
（ダイヤモンド状炭素膜）であるという点で、本発明と
は異なる。則ち既に述べたように、中間層材料と硬質炭
素膜との密着性を向上させるためには、硬質炭素膜に窒
素を少量でも添加することが極めて有効なのである。こ
れは、炭素は往々にして「低硬度の黒鉛質物質」に変化
し、材料中にこのような低硬度物質が生成することで、
界面や材料そのものの機械的強度を損ねるが、このよう
な場合に窒素が存在すると、黒鉛質の物質の生成を抑制
でき、また、中間層構成物質中の元素と窒化反応をおこ
すことでも密着強度向上に効果があるものと推定され
る。The present inventors worked together with the co-workers to form a diamond or diamond-like carbon film on a substrate by utilizing the reaction with the carbon to form IVa, Va, VIa of the periodic table. Group elements and elements such as Al, Si, and B themselves, or carbides, nitrides,
It has been proposed to utilize carbonitrides and the like (for example, JP-A-57-158372, JP-A-58-1269).
72, JP-A-61-104078, JP-A-62-116767, etc.). However, these proposals differ from the present invention in that the outermost layer is a diamond or hard carbon film (diamond-like carbon film). That is, as described above, it is extremely effective to add even a small amount of nitrogen to the hard carbon film in order to improve the adhesion between the intermediate layer material and the hard carbon film. This is because carbon often turns into "low-hardness graphitic material" and such low-hardness material is generated in the material,
Although the mechanical strength of the interface and the material itself is impaired, the presence of nitrogen in such a case can suppress the production of graphitic substances, and can also cause the nitridation reaction with the elements in the constituent materials of the intermediate layer to produce an adhesive strength. It is estimated that this is effective for improvement.
【００２１】硬質炭素膜への窒素添加量としては、炭素
に対する窒素の比率が２原子％以上、３０原子％以下で
あることが好ましい。窒素の比率が２原子％を下回る
と、窒素添加の効果が得られない。また、窒素の比率が
３０原子％を越えると、膜の硬度が極端に低下する傾向
を示し、好ましくないこともわかった。なお、窒素含有
硬質炭素膜は、不可避不純物以外に、炭素、窒素、水素
を主成分として含有する。膜合成時の原料によっては、
水素を全く含まない場合もある。いずれにしても、炭素
と窒素の比率が重要であり、窒素含有硬質炭素膜中の炭
素と窒素の組成比（含有率）をそれぞれＡ原子％、Ｂ原
子％とした時に、炭素に対する窒素の比率とは、炭素に
対する窒素の比率（原子％）＝Ｂ÷（Ａ＋Ｂ）×１００
で計算されるものとした。このような組成比の測定につ
いては、化学分析、物理分析などのあらゆる手法が適用
できるが、本発明者らはＸ線光電子分光分析法（ＸＰＳ
法）を用いて分析を行った。分析においては、膜の最表
面における吸着不純物を物理的に除去するための「イオ
ンビームスパッタリング」を併用した。The amount of nitrogen added to the hard carbon film is preferably such that the ratio of nitrogen to carbon is 2 atomic% or more and 30 atomic% or less. If the ratio of nitrogen is less than 2 atomic%, the effect of adding nitrogen cannot be obtained. Further, it has been found that when the nitrogen ratio exceeds 30 atomic%, the hardness of the film tends to extremely decrease, which is not preferable. The nitrogen-containing hard carbon film contains carbon, nitrogen, and hydrogen as main components in addition to inevitable impurities. Depending on the raw materials used during membrane synthesis,
It may not contain any hydrogen. In any case, the ratio of carbon to nitrogen is important. When the composition ratio (content) of carbon and nitrogen in the nitrogen-containing hard carbon film is A atomic% and B atomic%, respectively, the ratio of nitrogen to carbon is Is the ratio of nitrogen to carbon (atomic%) = B ÷ (A + B) × 100
It was assumed to be calculated by For the measurement of such a composition ratio, any technique such as chemical analysis and physical analysis can be applied. However, the present inventors have proposed X-ray photoelectron spectroscopy (XPS).
Method). In the analysis, "ion beam sputtering" for physically removing adsorbed impurities on the outermost surface of the film was used.
【００２２】なお、本被覆金型の用途としては、アルミ
合金や銅合金、はんだ、マグネシウム合金などの軟質で
かつ金型表面に溶着を起こしやすい被成形物の加工が特
に好適である。As a use of the present coating die, it is particularly preferable to process a soft material such as an aluminum alloy, a copper alloy, a solder, and a magnesium alloy, which is easily welded to the die surface.
【００２３】本発明の具体的な内容については実施例に
よって説明する。なお、実施例では、はんだ被覆リード
フレームの曲げ加工とマグネシウムのチクソ成形加工に
ついての結果のみを説明しているが、これら以外の金
型、例えばアルミニウムや銅の成形加工であっても同様
の効果が得られることは言うまでもない。また、実施例
では高速度鋼と超硬合金製金型についてのみ説明してい
るが、これら以外のセラミックス、ダイス鋼、プリハー
ドン鋼といった各種の金型用素材においても同様の効果
が得られることは言うまでもない。The specific contents of the present invention will be described with reference to embodiments. In the examples, only the results of the bending process of the solder-coated lead frame and the thixo-molding process of magnesium are described. However, the same effect can be obtained by molding other molds such as aluminum and copper. Needless to say, this is obtained. Further, although only the high-speed steel and the cemented carbide mold are described in the examples, the same effect can be obtained in various mold materials such as ceramics, die steel, and pre-hardened steel other than these. Needless to say.
【００２４】[0024]
【発明の実施の形態】本発明の具体的な実施の形態につ
いては実施例で示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be shown in Examples.
【００２５】[0025]
【実施例】（実施例１）高周波電界中におけるプラズマ
ＣＶＤ法によりダイヤモンド状炭素膜を形成する公知の
手法において、原料ガスであるメタンガスに窒素ガスを
添加することで、窒素含有硬質炭素膜を形成した。得ら
れた窒素含有硬質炭素膜の厚みは１μｍであった。なお
原料ガス中への窒素ガスの添加比率を変化させること
で、０原子％から３５原子％までの窒素比率の窒素添加
硬質炭素膜を得た。また本実施例において得られたダイ
ヤモンド状炭素膜中には、水素が約３０原子％含有され
ていた。(Example 1) In a known method of forming a diamond-like carbon film by a plasma CVD method in a high-frequency electric field, a nitrogen-containing hard carbon film is formed by adding nitrogen gas to methane gas as a raw material gas. did. The thickness of the obtained nitrogen-containing hard carbon film was 1 μm. By changing the addition ratio of nitrogen gas to the source gas, a nitrogen-added hard carbon film having a nitrogen ratio of 0 to 35 atomic% was obtained. The diamond-like carbon film obtained in this example contained about 30 atomic% of hydrogen.
【００２６】この窒素添加硬質炭素膜を、ＪＩＳ表記Ｖ
２０に相当する超硬合金で構成された、はんだ被覆リー
ドフレーム曲げ金型の表面に被覆した。金型のサイズは
幅２０ｍｍ×長さ４０ｍｍ×高さ３０ｍｍであり、リー
ドフレームの曲げ加工を受け持つ幅２０ｍｍ×長さ４０
ｍｍの面にコーティングを施した。また各種の中間層物
質をスパッタ法、アークイオンプレーティング法、中空
陰極放電イオンプレーティング法などを用いてこの金型
の表面に形成し、その上に窒素含有硬質炭素膜を形成し
た金型も作成した。This nitrogen-added hard carbon film is referred to as JIS notation V
The surface of a solder-coated lead frame bending mold made of a cemented carbide equivalent to 20 was coated. The size of the mold is 20 mm wide x 40 mm long x 30 mm high, and is 20 mm wide x 40 mm long, which is responsible for lead frame bending.
mm was coated. Also, various intermediate layer materials are formed on the surface of this mold by using a sputtering method, an arc ion plating method, a hollow cathode discharge ion plating method, etc., and a nitrogen-containing hard carbon film is formed thereon. Created.
【００２７】これらの金型に対して、はんだ被覆リード
フレームの曲げ加工を実施し、はんだの溶着防止効果や
耐摩耗性向上効果を評価した。はんだの成分は鉛とスズ
の重量比が８：２のものを用い、５万回形成毎の金型成
形面へのはんだ付着の様子及び、はんだが付着した時点
での被膜の剥離の有無を観察した。試験を行った実施例
である試料１〜２２と比較例である試料２３〜２７につ
いて、それらの膜構造と試験結果を表１に示す。The dies were subjected to bending of a solder-coated lead frame, and the effect of preventing solder welding and the effect of improving wear resistance were evaluated. The components of the solder used were those with a weight ratio of lead to tin of 8: 2. The state of solder adhesion to the mold forming surface every 50,000 times and the presence or absence of peeling of the coating at the time of solder adhesion Observed. Table 1 shows the film structures and test results of Samples 1 to 22, which are examples of the test, and Samples 23 to 27, which are comparative examples.
【００２８】表１からわかるように、実施例の試料１〜
２２は何れも比較例の試料２３〜２７に比し、溶着を生
じにくく、はんだ除去に至るまでのショット数も極めて
長く、且つ試験終了後も硬質炭素膜が完全な状態にある
ことがわかった。As can be seen from Table 1, samples 1 to 5 of the embodiment
Sample No. 22 was found to be less susceptible to welding than Samples 23 to 27 of Comparative Examples, had an extremely long number of shots until solder removal, and showed that the hard carbon film was in a perfect state even after the test was completed. .
【００２９】[0029]
【表１】 [Table 1]
【００３０】（実施例２）低電圧アーク放電を利用した
アークイオンプレーティング法によりダイヤモンド状炭
素膜を形成する公知の手法において、被膜形成雰囲気中
に窒素ガスを添加することで、窒素含有硬質炭素膜を形
成した。得られた窒素含有硬質炭素膜の厚みは１μｍで
あった。なお被膜形成雰囲気中での窒素ガス分圧を変化
させることで、０原子％から３５原子％までの窒素比率
の窒素添加硬質炭素膜を得た。なお、本実施例において
得られたダイヤモンド状炭素膜中には水素は含まれてい
なかった。Example 2 In a known method for forming a diamond-like carbon film by an arc ion plating method using a low-voltage arc discharge, a nitrogen-containing hard carbon is added to a film-forming atmosphere by adding nitrogen gas. A film was formed. The thickness of the obtained nitrogen-containing hard carbon film was 1 μm. Note that a nitrogen-added hard carbon film having a nitrogen ratio of 0 atomic% to 35 atomic% was obtained by changing the nitrogen gas partial pressure in the film forming atmosphere. In addition, hydrogen was not contained in the diamond-like carbon film obtained in this example.
【００３１】なお基材はダイス鋼（ＪＩＳ ＳＫＤ６
１）からなるマグネシウム合金のチクソ成形用金型と
し、形状は、幅５０ｍｍ×長さ６０ｍｍ×高さ３０ｍｍ
であった。被膜の形成は、この金型母材のうち、マグネ
シウム合金と触れる成形面である幅５０ｍｍ×長さ６０
ｍｍの面と、その外周部の幅１０ｍｍの部位について実
施した。The base material is die steel (JIS SKD6).
A mold for thixomolding of a magnesium alloy composed of 1), having a shape of width 50 mm × length 60 mm × height 30 mm
Met. The coating is formed by a molding surface that is in contact with the magnesium alloy and has a width of 50 mm and a length of 60 mm.
mm and a 10 mm wide portion of the outer periphery thereof.
【００３２】これらの金型に対して、マグネシウム合金
（ＡＺ９１Ｄ）のチクソ成形加工を実施し、金型の性能
を評価した。成形条件は射出成形機の出口、則ち金型の
スプルー部での温度６００℃、金型温度２００℃、離型
材を最初の１ショット目のみ塗布とし、成型品の型離れ
性（型離れ性が低下した時点のショット数）と被膜の剥
離の状態（型離れ性が低下した時点）を観察した。試験
を行った試験を行った実施例である試料２８〜４９と比
較例である試料５０〜５４について、膜構造と試験結果
を表２に示す。The dies were subjected to thixo molding of a magnesium alloy (AZ91D), and the performance of the dies was evaluated. The molding conditions were as follows: the temperature at the outlet of the injection molding machine, that is, the temperature at the sprue portion of the mold was 600 ° C., the mold temperature was 200 ° C., and the release material was applied only for the first shot. (The number of shots at the time when the temperature decreased) and the state of peeling of the coating film (at the time when the mold release property decreased). Table 2 shows the film structures and test results of Samples 28 to 49, which are the examples of the test, and Samples 50 to 54, which are the comparative examples.
【００３３】表２からわかるように、実施例の試料２８
〜４９は何れも比較例の試料５０〜５４に比し、離型抵
抗が小さいために成型品に歪みが生じることがなく、寿
命も極めて長く、且つ試験終了後も硬質炭素膜が健全な
状態にあることが確認できた。As can be seen from Table 2, the sample 28 of the embodiment
The samples No. 49 to No. 49 have a smaller release resistance than the samples 50 to 54 of the comparative example, so that no distortion occurs in the molded product, the life is extremely long, and the hard carbon film is in a healthy state even after the test is completed. Was confirmed.
【００３４】[0034]
【表２】 [Table 2]
【００３５】[0035]
【発明の効果】本発明によれば、金型の成形面における
被加工物の溶着を防ぐとともに型離れをスムーズにする
ことができ、金型の摩耗を穏やかに進行させることがで
きるだけでなく、美麗且つ歪みのない被成型物を得るこ
とができる。また本発明は、プレス加工、絞り加工、打
ち抜き加工ともに利用することができ、有用である。According to the present invention, not only welding of the workpiece on the molding surface of the mold can be prevented, the mold can be separated smoothly, but also the wear of the mold can be progressed gently. A beautiful and distortion-free molded article can be obtained. Further, the present invention can be used for all of press working, drawing work and punching work, and is useful.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4E050 JA01 JA03 JA08 JB09 JB10 JD03 JD07 4K029 AA02 AA04 BA02 BA03 BA11 BA16 BA17 BA34 BA35 BA54 BA55 BA56 BA58 BA59 BA60 BA64 BB02 BC02 BD05 4K030 BA02 BA12 BA13 BA17 BA18 BA26 BA28 BA36 BA37 BA38 BA39 BA40 BA41 CA02 CA03 CA05 LA01 LA21 ──────────────────────────────────────────────────続 き Continued on front page F-term (reference) 4E050 JA01 JA03 JA08 JB09 JB10 JD03 JD07 4K029 AA02 AA04 BA02 BA03 BA11 BA16 BA17 BA34 BA35 BA54 BA55 BA56 BA58 BA59 BA60 BA64 BB02 BC02 BD05 4K030 BA02 BA12 BA13 BA17 BA18 BA26 BA28 BA38 BA39 BA40 BA41 CA02 CA03 CA05 LA01 LA21
Claims (7)
リハードン鋼あるいはダイス鋼を基材とした金型におい
て、該金型の成形面の全部または一部が耐摩耗性被膜で
被覆されてなり、該耐摩耗性被膜の最外層は炭素を主成
分として炭素に対する窒素の比率が２原子％以上３０原
子％以下であり、炭素と窒素以外の成分として不可避不
純物を含んだ窒素含有硬質炭素膜であることを特徴とす
る被覆金型。1. A mold based on ceramics, cemented carbide, high speed steel, pre-hardened steel or die steel, wherein all or a part of the molding surface of the mold is coated with a wear-resistant coating. The outermost layer of the wear-resistant coating is a nitrogen-containing hard carbon film containing carbon as a main component and having a nitrogen to carbon ratio of 2 to 30 atomic% and containing unavoidable impurities as components other than carbon and nitrogen. A coated mold, characterized in that:
特徴とする請求項１記載の被覆金型。2. The coating mold according to claim 1, wherein one of the unavoidable impurities is hydrogen.
接被覆形成されてなることを特徴とする請求項１または
２記載の被覆金型。3. The coating mold according to claim 1, wherein the nitrogen-containing hard carbon film is formed by directly coating the surface of the mold base material.
は１層以上の中間層を設けた多層耐摩耗被覆構造である
ことを特徴とする請求項１または２記載の被覆金型。4. The coating metal according to claim 1, wherein the coating metal has a multilayer wear-resistant coating structure in which one or more intermediate layers are provided between the nitrogen-containing hard carbon film and the mold base material. Type.
周期律表ＩＶａ、Ｖａ、ＶＩａ族元素の金属、炭化物、
窒化物、炭窒化物、並びにＡｌ、ＡｌＮ、Ｓｉ、Ｓｉ
Ｃ、Ｓｉ3Ｎ4、Ｂ4Ｃ、ＢＮ及びこれらの化合物、混合
物、多層構造物からなることを特徴とする請求項１、２
または４記載の被覆金型。5. The intermediate layer in contact with the nitrogen-containing hard carbon film,
Metals, carbides of Group IVa, Va, VIa elements,
Nitride, carbonitride, and Al, AlN, Si, Si
3. The method according to claim 1, wherein the material comprises C, Si 3 N 4 , B 4 C, BN, a compound thereof, a mixture, or a multilayer structure.
Or the coated mold according to 4.
ことを特徴とする請求項１、２、３、４または５記載の
被覆金型。6. The coating die according to claim 1, wherein the die is for press-molding a non-ferrous metal.
用であることを特徴とする請求項１、２、３、４または
５記載の被覆金型。7. The coated mold according to claim 1, wherein the mold is for thixo molding of a magnesium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11047599A JP2000246371A (en) | 1999-02-25 | 1999-02-25 | Coated die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11047599A JP2000246371A (en) | 1999-02-25 | 1999-02-25 | Coated die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000246371A true JP2000246371A (en) | 2000-09-12 |
Family
ID=12779719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11047599A Pending JP2000246371A (en) | 1999-02-25 | 1999-02-25 | Coated die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000246371A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255448A (en) * | 2007-04-06 | 2008-10-23 | Osg Corp | Hard coating film and tool coated with the hard coating film |
| WO2016042945A1 (en) * | 2014-09-16 | 2016-03-24 | 株式会社リケン | Coated slide member |
-
1999
- 1999-02-25 JP JP11047599A patent/JP2000246371A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255448A (en) * | 2007-04-06 | 2008-10-23 | Osg Corp | Hard coating film and tool coated with the hard coating film |
| WO2016042945A1 (en) * | 2014-09-16 | 2016-03-24 | 株式会社リケン | Coated slide member |
| JP2016060921A (en) * | 2014-09-16 | 2016-04-25 | 株式会社リケン | Coating slide member |
| CN106661717A (en) * | 2014-09-16 | 2017-05-10 | 株式会社理研 | Coated slide member |
| CN106661717B (en) * | 2014-09-16 | 2019-06-28 | 株式会社理研 | Coating sliding component |
| US10392576B2 (en) | 2014-09-16 | 2019-08-27 | Kabushiki Kaisha Riken | Coated sliding member |
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