JPH07207398A - Material made of cemented carbide with reduced adhesion of resin - Google Patents
Material made of cemented carbide with reduced adhesion of resinInfo
- Publication number
- JPH07207398A JPH07207398A JP1586294A JP1586294A JPH07207398A JP H07207398 A JPH07207398 A JP H07207398A JP 1586294 A JP1586294 A JP 1586294A JP 1586294 A JP1586294 A JP 1586294A JP H07207398 A JPH07207398 A JP H07207398A
- Authority
- JP
- Japan
- Prior art keywords
- cemented carbide
- resin
- carbide member
- reduced
- 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.)
- Granted
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Lead Frames For Integrated Circuits (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は樹脂の付着を低減して信
頼性及び使用寿命を改善した各種超硬合金部材に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various cemented carbide members having reduced resin adhesion and improved reliability and service life.
【０００２】[0002]
【従来の技術】リードフレームにＩＣをマウントする工
程には従来より 各種の超硬製のパンチ、ダイが数多く
使用されている。特にＩＣを環境から保護するための樹
脂モールドが一般的であるため、樹脂タブレット製造の
ための臼、杵、射出成形部のポット、プランジャー、樹
脂導入口のゲート、リードフレームのタイバーカット、
レジン樹脂を除去するレジンカットパンチなどは直接ま
たは間接に樹脂と接触するものが数多くある。2. Description of the Related Art Various punches and dies made of various kinds of carbide have been used in the process of mounting an IC on a lead frame. In particular, resin molds are commonly used to protect ICs from the environment, so dies, pestle, injection molding pots, plungers, resin inlet gates, lead frame tie bar cuts for resin tablet manufacturing,
There are many resin cut punches and the like that directly or indirectly contact the resin to remove the resin.
【０００３】ところが、最近樹脂の高性能化のためフィ
ラー剤であるシリカの含有量が高くかつ腐食性のガスを
多量に発生させるような種類の樹脂が使用されはじめ
た。そのためこのような樹脂と接触する超硬部材は硬い
シリカによって表面が摩耗して凹凸がはげしくなる。凹
凸が激しくなると樹脂が超硬部材の表面に付着しやすく
なり、次には付着した樹脂から発生する腐食性のガスの
ために超硬部材の金属バインダー部分が侵食され表面の
ダメージが助長される。However, recently, in order to improve the performance of resins, resins of a type having a high content of silica as a filler and generating a large amount of corrosive gas have begun to be used. Therefore, the surface of the cemented carbide member that comes into contact with such a resin is abraded by the hard silica, so that the irregularities are easily peeled off. When the unevenness becomes severe, the resin easily adheres to the surface of the cemented carbide member, and then the corrosive gas generated from the adhered resin erodes the metal binder part of the cemented carbide member and promotes surface damage. .
【０００４】[0004]
【発明が解決しようとする課題】このように従来の超硬
では最近の樹脂に含有されるシリカの硬さおよび腐食性
ガスに負けて表面の凹凸が激しくなりそれが樹脂の付着
を誘発し、信頼性および使用寿命を激減させている。As described above, in the conventional cemented carbide, the hardness of silica recently contained in the resin and the corrosive gas cause the surface roughness to become severe, which induces the adhesion of the resin. The reliability and service life are drastically reduced.
【０００５】[0005]
【課題を解決するための手段】シリカの硬さに勝ち、か
つ腐食性ガスに勝つためには金属バインダー量を少なく
しさらに平均粒径の小さいＷＣを用いたいわゆる超微粒
合金とすれば金属部の平均自由行路(MEAN FREE PATH)が
短くなり耐腐食性は向上する。しかしながら、金属量を
低減しかつ微粒子化すると当然ながら抗折力と破壊靱性
値が低下する。ところが最近の多ピン化傾向のためパン
チを筆頭に部材全般が薄肉化の傾向にある。このような
薄肉部材に低バインダー超微粒合金を用いると抗折力と
破壊靱性値が低いために折損を起こす頻度が高くなり実
用に供せられない。本発明者らはこの相反する性質を１
つの部材に共存させる方法について鋭意検討を行った結
果、表面は硬くかつ耐食性のある組成とし、内部は靱性
に富む組成の２重構造とすることで解決するに至った。
以下、特許請求の範囲に従って詳細に説明する。Means for Solving the Problems In order to overcome the hardness of silica and to overcome corrosive gas, the metal portion should be formed by using a so-called ultrafine grain alloy in which the amount of metal binder is reduced and WC having a small average grain size is used. The mean free path of (MEAN FREE PATH) is shortened and the corrosion resistance is improved. However, if the amount of metal is reduced and the particles are made finer, the transverse rupture strength and the fracture toughness value naturally decrease. However, due to the recent tendency to increase the number of pins, there is a tendency for the overall thickness of the members to decrease, starting with the punch. If a low-binder ultrafine grain alloy is used for such a thin member, the fracture strength and the fracture toughness value are low and the frequency of breakage is high, so that it cannot be put to practical use. The present inventors have found that these contradictory properties are
As a result of extensive studies on a method of coexisting in one member, it has been solved by making the surface a composition having a hard and corrosion resistant property and the interior having a double structure having a toughness-rich composition.
Hereinafter, a detailed description will be given according to the claims.
【０００６】[0006]
【作用】まず表層のＡ部の金属バインダーを用いる場合
はＣｏ、Ｎｉ、Ｆｅの１種または２種以上を用いる。そ
れ以外の金属では炭化物とのぬれ性が悪く実用に供せら
れない。これらの鉄族金属の含有量は０〜５％の範囲と
する。５％を越えると硬さが低下するため表面の凹凸が
生じ易くなり本発明の主旨に反する。特に耐食性を向上
させる場合はＣｒを添加することが効果的でこの場合添
加量は０〜１．０％とする。１．０％を越えると靱性が
低下し実用に供せられない。ＷＣの１部は周期律表の４
Ａ、５Ａ、６Ａ族の炭化物、窒化物、炭窒化物から選ば
れた１種または２種以上で置換して良いが、この場合置
換量は高々２０％までとする。２０％を越えると靱性が
低下し実用に供せられない。これらＷＣ以外の硬質物質
を用いる理由は添加する硬質物質の種類によって耐食性
の向上や耐摩耗性の向上が望めるからである。When the metal binder in the A portion of the surface layer is used, at least one of Co, Ni and Fe is used. Other metals have poor wettability with carbides and cannot be put to practical use. The content of these iron group metals is in the range of 0 to 5%. If it exceeds 5%, the hardness is lowered, so that surface irregularities are likely to occur, which is contrary to the gist of the present invention. Particularly in the case of improving the corrosion resistance, it is effective to add Cr, and in this case, the addition amount is 0 to 1.0%. If it exceeds 1.0%, the toughness decreases and it cannot be put to practical use. Part 1 of WC is 4 of the Periodic Table
It may be substituted with one or more selected from A, 5A and 6A group carbides, nitrides and carbonitrides, but in this case, the substitution amount is at most 20%. If it exceeds 20%, the toughness deteriorates and it cannot be put to practical use. The reason for using a hard substance other than WC is that improvement in corrosion resistance and wear resistance can be expected depending on the type of hard substance added.
【０００７】Ａ部は勿論、超硬合金の１種であり、従っ
て残余はＷＣである。またＡ部の厚みは再研磨回数等よ
りは厚いほうが好ましいが、実用的には０．０５〜１５
ｍｍ程度でその用途、形状により適宜決められる。極め
て硬さが要求されるような用途や、パンチのような細長
い場合には１回使用に耐える厚さでよく、またプランジ
ャーのような摺動面の場合には再研磨等により繰り返し
の使用を考慮して厚くすることができる。The part A is, of course, a kind of cemented carbide, so the balance is WC. Further, the thickness of the A portion is preferably thicker than the number of times of re-polishing, etc., but practically 0.05 to 15
The thickness is about mm and is appropriately determined depending on its use and shape. For applications that require extremely high hardness, or for long and slender products such as punches, the thickness can withstand one use, and for sliding surfaces such as plungers, re-polishing can be used repeatedly. Can be made thicker.
【０００８】内部のＢ部は硬さがＨＲＡ９２以下のＷＣ
基超硬またはサーメットとする。ＨＲＡ９２以下とする
ことで靱性が確保でき、薄肉形状の部材として使用して
も折損の頻度が少なく実用に充分供せられる。Ａ部とＢ
部の２重構造とする方法としては温度の上昇が少なく負
荷加重の少ない場合は銀ろう付けで充分本発明の主旨に
叶う。さらに接合強度を確保したいときにはＡ部構成部
とＢ部構成部を重ねて通電加熱で接合することでその目
的を達することが出来る。この場合接合部に金属薄片や
未焼結 超硬プレス体を挿入して通電加熱接合をしても
良い効果が得られる。The inner part B has a hardness of HR of less than HRA92.
Base cemented carbide or cermet. By setting the HRA to 92 or less, the toughness can be ensured, and even when it is used as a thin member, the frequency of breakage is small and it can be sufficiently put to practical use. Part A and B
As a method of forming the double structure of the part, when the temperature rise is small and the load is small, silver brazing is sufficient for the purpose of the present invention. Further, when it is desired to secure the bonding strength, the purpose can be achieved by superposing the part A constituent part and the part B constituent part and bonding them by electric heating. In this case, it is possible to obtain a good effect by inserting a metal thin piece or an unsintered cemented carbide press body into the joint portion and performing electric current heating joint.
【０００９】また、さらに接合強度を向上させたい時に
は成形体同士をかさねて焼結する、いわゆる焼結接合と
いう手段をとる事ができる。勿論この場合にも通電加熱
焼結の手段を採ることが出来る。超硬合金部材として具
体的には樹脂モールド用のポット、プランジャー樹脂タ
ブレット成形用の臼、杵、モールド流入口に設置するゲ
ート、リードフレーム打ち抜き用のパンチとダイ、特に
モールド用の樹脂が付着しやすいタイバー部のカットパ
ンチとダイ、レジン樹脂を除去するレジンカットパンチ
とダイなどはその用途から直接間接に樹脂の影響を受け
易く本発明の適用によってその改善効果が大きい。When it is desired to further improve the bonding strength, a so-called sinter-bonding method can be used in which the compacts are overlaid and sintered. Of course, also in this case, a means of electric heating and sintering can be adopted. Concretely, as a cemented carbide member, a resin mold pot, a plunger resin tablet molding die, a punch, a gate to be installed at the mold inlet, a lead frame punching punch and die, and especially a molding resin are attached. The cut punch and die of the tie bar portion, which is easy to perform, and the resin cut punch and die that remove the resin resin are easily influenced by the resin directly and indirectly due to their use, and the improvement effect is large by the application of the present invention.
【００１０】[0010]
【実施例】ＷＣ、Ｃｏ、Ｃｒなどの原料粉末を所定の比
に秤量後アルコールを分散剤として用いボールミルで７
２時間湿式混合した。次にスプレードライで混合粉を乾
燥、造粒後所定の形状にプレス成形した。このようにし
て得られた成形体を重ねて（Ａ部用とＢ部用）焼結（処
理１）する、または焼結後銀ろう付けする（処理２）ま
たは焼結後通電加熱（処理３）する、または金属薄を２
種の焼結体間に挿入し通電加熱（処理４）するなどの手
段を用いて接合した。Ａ部の材種を変え、Ｂ部の組成を
ＪＩＳ・Ｋ４０相当のＷＣ−Ｃｏ合金、またはサーメッ
ト合金として製作した。その組成、用途等を表１・表２
に示す。Example: Raw material powders such as WC, Co and Cr were weighed in a predetermined ratio, and alcohol was used as a dispersant.
Wet mixed for 2 hours. Next, the mixed powder was dried by spray drying, granulated, and then press-molded into a predetermined shape. The thus-obtained compacts are stacked (for part A and part B) and sintered (treatment 1), or silver brazed after sintering (treatment 2) or electric heating after sintering (treatment 3). ) Or thin metal to 2
The pieces were joined by using a means such as inserting them between seed sintered bodies and heating them electrically (treatment 4). By changing the material type of the A part, the composition of the B part was manufactured as a WC-Co alloy corresponding to JIS K40 or a cermet alloy. Table 1 and Table 2 show its composition and uses.
Shown in.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】こうして得られた接合部材を、Ａ部が樹脂
との接触部であるようにして樹脂モールド用のポット、
プランジャー、樹脂タブレット成形用臼、杵、ＩＣの樹
脂モールド金型のゲート、タイバーカットパンチおよび
ダイ、レジンカット、パンチおよびダイを作製し従来品
と比較し、樹脂の付着状況、折損頻度および耐摩耗性を
調査した。その結果を表３に示す。The joining member thus obtained is provided with a pot for resin molding in such a manner that the portion A is a contact portion with resin.
Plunger, resin tablet forming die, pestle, IC resin mold die gate, tie bar cut punch and die, resin cut, punch and die were prepared and compared with conventional products, resin adhesion status, breakage frequency and durability The wear resistance was investigated. The results are shown in Table 3.
【００１４】[0014]
【表３】 [Table 3]
【００１５】表３より、表面を高硬度な、バインダー量
の少ない材種とすることにより、樹脂の付着を減少させ
ると共に、摩耗量を少なめ長寿命化を達成できると共
に、その厚さが十分あるため再研磨も可能である。From Table 3, it can be seen that when the surface is made of a material having a high hardness and a small amount of binder, the adhesion of the resin can be reduced, the amount of wear can be reduced and the life can be extended, and the thickness is sufficient. Therefore, repolishing is also possible.
【００１６】[0016]
【発明の効果】このように、表面を結合金属を少なくし
て極めて硬くし、内部を結合金属を多くした靱性に富む
２重構造の超硬合金 部材を用いた各種金型部材は樹脂
の付着が少なく、折損頻度も僅少でかつ耐摩耗性に富む
性質を得ることが出来る。Industrial Applicability As described above, various mold members using a double-structured cemented carbide member having a highly toughened surface in which the amount of the binding metal is reduced to be extremely hard and the inside thereof is increased in the amount of the binding metal are attached with the resin. It is possible to obtain the property that the number of breakage is small, the frequency of breakage is small, and the abrasion resistance is high.
Claims (10)
て、表層部（以下Ａ部と称する）は、鉄属金属；０〜５
％、Ｃｒ；０〜１．０％、ＷＣ；７５〜１００％、及び
周期律表の４Ａ、５Ａ、６Ａ族の炭化物、窒化物、炭窒
化物、ほう化物から選ばれた１種または２種以上；０〜
２０％で構成され、内部（以下Ｂ部と称する）が硬さＨ
ＲＡ９２以下のＷＣ基超硬合金またはＴｉＣまたはＴｉ
ＣＮ基サーメットであることを特徴とする樹脂付着を低
減した超硬合金部材。1. A member obtained by joining different cemented carbides, wherein the surface layer portion (hereinafter referred to as A portion) is an iron group metal;
%, Cr; 0 to 1.0%, WC; 75 to 100%, and one or two selected from carbides, nitrides, carbonitrides and borides of 4A, 5A and 6A groups of the periodic table. Or more; 0
It is composed of 20%, and the inside (hereinafter referred to as B part) has hardness H
RA92 or less WC-based cemented carbide or TiC or Ti
A cemented carbide member with reduced resin adhesion, which is a CN-based cermet.
モールド用のポット及び／またはプランジャ−の全体ま
たはその１部を請求硬１記載の超硬合金部材で構成した
ことを特徴とする樹脂付着を低減した超硬合金部材。2. A resin adhesion pot characterized in that a pot and / or a plunger for resin molding of a semiconductor element (hereinafter referred to as an IC) is entirely or partially formed of the cemented carbide member according to claim 1. Cemented carbide member with reduced
を成形するための臼または杵の全体または１部を請求硬
１記載の超硬合金部材で構成したことを特徴とする樹脂
付着を低減した超硬合金部材。3. A superplasticizer having reduced resin adhesion, characterized in that the die or punch for molding a resin tablet for resin molding of IC is entirely or partially formed of the cemented carbide member according to claim 1. Hard alloy material.
されるゲート部部品（以下ゲートと略称）の全体または
１部を請求硬１記載の超硬合金部材で構成したことを特
徴とする樹脂付着を低減した超硬合金部材。4. The whole or a part of a gate part (hereinafter abbreviated as a gate) into which a resin of a resin mold of an IC is injected is constituted by a cemented carbide member according to claim 1. Cemented carbide members with reduced resin adhesion.
用パンチまたはダイの全体または１部を請求硬１記載の
超硬合金部材で構成したことを特徴とする樹脂付着を低
減した超硬合金部材。5. A cemented carbide member with reduced resin adhesion, characterized in that the punching die or die for an IC mounting lead frame is wholly or partially formed of the cemented carbide member according to claim 1.
部（以下タイバーカットパンチ及びダイと略称する）で
あることを特徴とする樹脂付着を低減した超硬合金部
材。6. The cemented carbide member according to claim 5, wherein the punching is a tie bar portion (hereinafter abbreviated as tie bar cut punch and die).
いて付着した樹脂を除去するためのパンチまたはダイ
（以下レジンカットパンチまたはダイと略称）の全体ま
たは１部を請求硬１記載の超硬合金部材で構成したこと
を特徴とする樹脂付着を低減した超硬合金部材。7. A cemented carbide member according to claim 1, wherein all or part of a punch or die (hereinafter abbreviated as resin cut punch or die) for removing resin adhered in a step of mounting an IC on a lead frame is claimed. A cemented carbide member with reduced resin adhesion, characterized in that
Ａ部とＢ部を銀ろうで接合したことを特徴とする樹脂付
着を低減した超硬合金部材。8. A cemented carbide member with reduced resin adhesion, according to claim 1, wherein part A and part B of claim 1 are joined by silver brazing.
Ａ部とＢ部を通電加熱法で接合したことを特徴とする樹
脂付着を低減した超硬合金部材。9. A cemented carbide member with reduced resin adhesion, according to claim 1, wherein part A and part B of claim 1 are joined by an electric heating method.
すＡ部とＢ部を焼結前の粉末成形体で重ね次に焼結する
ことを特徴とする樹脂付着を低減した超硬合金部材。10. A cemented carbide with reduced resin adhesion, according to claim 1, wherein part A and part B according to claim 1 are stacked on a powder compact before sintering and then sintered. Element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01586294A JP3512224B2 (en) | 1994-01-14 | 1994-01-14 | Cemented carbide members with reduced resin adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01586294A JP3512224B2 (en) | 1994-01-14 | 1994-01-14 | Cemented carbide members with reduced resin adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07207398A true JPH07207398A (en) | 1995-08-08 |
| JP3512224B2 JP3512224B2 (en) | 2004-03-29 |
Family
ID=11900618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01586294A Expired - Fee Related JP3512224B2 (en) | 1994-01-14 | 1994-01-14 | Cemented carbide members with reduced resin adhesion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3512224B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8993095B2 (en) | 2007-09-14 | 2015-03-31 | Sumitomo Electric Industries, Ltd. | Composite material and coated cutting tool |
| JP2018090459A (en) * | 2016-12-06 | 2018-06-14 | 日本タングステン株式会社 | Joint, its using method, and its manufacturing method |
-
1994
- 1994-01-14 JP JP01586294A patent/JP3512224B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8993095B2 (en) | 2007-09-14 | 2015-03-31 | Sumitomo Electric Industries, Ltd. | Composite material and coated cutting tool |
| JP2018090459A (en) * | 2016-12-06 | 2018-06-14 | 日本タングステン株式会社 | Joint, its using method, and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3512224B2 (en) | 2004-03-29 |
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