JPH02200704A - Sheet for sintering - Google Patents
Sheet for sinteringInfo
- Publication number
- JPH02200704A JPH02200704A JP1020593A JP2059389A JPH02200704A JP H02200704 A JPH02200704 A JP H02200704A JP 1020593 A JP1020593 A JP 1020593A JP 2059389 A JP2059389 A JP 2059389A JP H02200704 A JPH02200704 A JP H02200704A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- hard alloy
- sintering
- sintered
- sintered hard
- 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
- 238000005245 sintering Methods 0.000 title abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 19
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 8
- 239000001569 carbon dioxide Substances 0.000 claims description 8
- 238000010304 firing Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- -1 polypropylene Polymers 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- 239000004743 Polypropylene Substances 0.000 abstract description 3
- 229920000728 polyester Polymers 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 229920001155 polypropylene Polymers 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract 7
- 229910045601 alloy Inorganic materials 0.000 abstract 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000009545 invasion Effects 0.000 abstract 1
- 239000001095 magnesium carbonate Substances 0.000 abstract 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract 1
- 235000014380 magnesium carbonate Nutrition 0.000 abstract 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000005261 decarburization Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は超硬合金を焼結させる際に超硬合金とセッター
との間に敷いて用いるに適した焼成用シートに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sintering sheet suitable for being placed between a cemented carbide and a setter when sintering the cemented carbide.
（従来の技術）
超硬合金の焼結は真空中又は非酸化性雰囲気中で行われ
、超硬合金はカーボン製のセッター〇上に載せられて焼
結されるのが普通である。この場合、センターと超硬合
金とが直接接触するとカーボンが超硬合金中に入る浸炭
現象や逆の脱炭現象が生じて超硬合金の性質を変化させ
ることがあるため、表面に予め有機バインダーとカーボ
ン粉末との混練物を刷毛塗り等により塗布した七ツク−
が使用され゛こいる。(Prior Art) Sintering of cemented carbide is carried out in a vacuum or in a non-oxidizing atmosphere, and the cemented carbide is usually placed on a setter made of carbon and sintered. In this case, if the center and the cemented carbide come into direct contact, a carburization phenomenon in which carbon enters the cemented carbide or a reverse decarburization phenomenon may occur, which may change the properties of the cemented carbide. and carbon powder applied by brushing etc.
is being used.
ところがこのような従来の方法は、塗布ムラによってセ
ンター表面が不均一となるために不均一・なセッター表
面と超硬合金との接触面から酸素が侵入して超硬合金の
表面に酸化物を形成しクラックを生ずるおそれがあるこ
と、焼結された超硬合金の表面に凹凸が生じ易い欠点が
あること、センター表面への塗布後に約１日程度の乾燥
］１程が必要となり焼結工程の自動化が困難であること
、カーボンが製品に付着したり炉内に飛散して汚れ易い
こと等の多くの欠点があった。更に超硬合金の性質によ
ってはカーボン以外にＡＩＮ、ＢＮ等の粉末を使用する
こともあるが、これらは高価であるためコスト高となる
欠点があった。However, in this conventional method, the center surface becomes uneven due to uneven coating, and oxygen enters from the contact surface between the uneven setter surface and the cemented carbide, causing oxides to form on the surface of the cemented carbide. The sintered cemented carbide has the disadvantage of being prone to unevenness on the surface, and the sintering process requires about 1 day of drying after application to the center surface. It has many drawbacks, such as difficulty in automation, and the tendency for carbon to adhere to the product or scatter in the furnace, causing contamination. Furthermore, depending on the properties of the cemented carbide, powders such as AIN and BN may be used in addition to carbon, but these powders are expensive and therefore have the disadvantage of increasing costs.
（発明が解決しようとする課題）
本発明は上記のような従来の欠点を解決して、超硬合金
を表面にクランクや凹凸を発生させることなく１．また
汚れを生じることなくイ氏コス１で焼結することができ
る焼成用シートを提供するために完成されたものである
。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks and eliminates the occurrence of cranks or irregularities on the surface of cemented carbide by: 1. Furthermore, the present invention was completed in order to provide a sintering sheet that can be sintered at a temperature of 1 C without causing stains.
（課題を解決するための手段）
上記の課題は、熱的に安定であるが高温に加熱されると
炭酸ガスを発生ずる炭酸塩の粒子を有機バインダー中に
分散さセシート状としたことを特徴とする焼成用シート
によって解決される。(Means for solving the problem) The above problem is solved by dispersing carbonate particles, which are thermally stable but generate carbon dioxide gas when heated to high temperatures, in an organic binder to form a sheet-like structure. The problem is solved by using a baking sheet.
また上記の課題は、熱的に安定であるが高温に加熱され
ると炭酸ガスを発生する炭酸塩の粒子を有機バインダー
中に分散させたものを、有機フィルトの表面にコーティ
ングしたことを特徴とする焼成用シートによって解決さ
れる。Furthermore, the above problem was solved by coating the surface of the organic filter with carbonate particles, which are thermally stable but generate carbon dioxide gas when heated to high temperatures, dispersed in an organic binder. The problem is solved by using a baking sheet.
第１図は第１の発明を示す断面図であり、（１）は炭酸
塩の粒子、（２）は有機バインダーであり、全体は厚さ
が例えば２００ μ程度のシート状に成形されこいる。FIG. 1 is a cross-sectional view showing the first invention, in which (1) is carbonate particles, (2) is an organic binder, and the whole is formed into a sheet with a thickness of, for example, about 200 μm. .
炭酸塩の粒子（１）としては、熱的に安定であるが超硬
合金の焼結に必要な高温（例えば１３００〜１５００°
Ｃ）に加熱されると炭酸ガスを発生ずる性質を有するＣ
ａＣ（１＋ 、ｎ、、ｃｏ、等が用いられる。また有機
バインダー（２）としては、例えばＰＶＡ 、、ＰＶＢ
、ポリプロピレン、ポリエステル、ポリエチレン等が使
用される。これらの炭酸塩の粒子（１）は有機バインダ
ー（２）中Ｃご１０〜８０重量％程度の比率で混練され
、シート状に成形される。なお炭酸塩の粒子（１）の粒
径は特に限定されるものではないが、表面ｍさの関係上
１０μ以下のものが最も好ましい。The carbonate particles (1) are thermally stable but at high temperatures (e.g. 1300-1500°) required for sintering cemented carbide.
C) has the property of generating carbon dioxide gas when heated to
aC(1+, n, , co, etc.) are used. Also, as the organic binder (2), for example, PVA, , PVB
, polypropylene, polyester, polyethylene, etc. are used. These carbonate particles (1) are kneaded in an organic binder (2) in a proportion of about 10 to 80% by weight of C, and then formed into a sheet. Although the particle size of the carbonate particles (1) is not particularly limited, it is most preferably 10 μm or less in terms of surface depth.
第２図に示す第２の発明では、−ト記した炭酸塩の粒子
（１）と有機バ・イングー（２）との混練物が有機フィ
ルム（３）の表面にコーティングされている。有機フィ
ルム（３）としては例えばＰＶＡ 、 ＰｖＲ、ポリプ
ロピレン、ポリエステル、ポリエチレン等が使用され、
その厚みは例えば４０μ程度のものを使用することがで
きる。／１２練物は有機フィルム（３）の片側の表面に
コーティングし“Ｃもよいが、有機フィルＪ、（３）が
カールするおそれがあるため、図示のように両面にコー
ティングすることが好まし７い、混練物の１−ティング
の１７みは例えば３０μ程度とすればよい。In the second invention shown in FIG. 2, the surface of an organic film (3) is coated with a kneaded mixture of the carbonate particles (1) described in (1) and organic ba-ingu (2). As the organic film (3), for example, PVA, PvR, polypropylene, polyester, polyethylene, etc. are used.
For example, a thickness of about 40 μm can be used. /12 It is also possible to coat one side of the organic film (3) with the paste (C), but since there is a risk that the organic film (3) may curl, it is preferable to coat both sides as shown in the figure. For example, the diameter of the kneaded material may be about 30 μm.
（作用）
このように構成された焼成用シートは、第３図Ｃご示さ
れるようにカーボン製のセッター（４）の上面に敷き、
その上面に超硬合金（５）を載せて使用されるものであ
り、従来と同様に真空中又は非酸化性雰囲気中で１３０
０〜１５００°Ｃで焼結が行われる。(Function) The baking sheet configured in this way is placed on the top surface of a carbon setter (4) as shown in Figure 3C.
It is used by placing a cemented carbide (5) on the top surface, and as in the past, it is used in a vacuum or non-oxidizing atmosphere.
Sintering takes place at 0-1500°C.
このような高温に加熱されると、本発明の焼成用シート
中の有機バインダー（２）や有機フィルム（３）は蒸発
するとともに、焼成用シート中に含まれる炭酸塩の粒子
（１）は分解して炭酸ガスを発生し、不活性な炭酸ガス
層（６）を超硬合金（５）とセッター（４）との間に形
成する。このため、超硬合金（５）とセッター（４）と
が直接接触することが防止されるとともに、超硬合金（
５）とセッター（４）との接触面から雰囲気中に微量台
まれる酸素が侵入するおそれがなくなり、従来のような
接触面から侵入した酸素によるクラックの発生は完全に
防止される。When heated to such a high temperature, the organic binder (2) and organic film (3) in the firing sheet of the present invention evaporate, and the carbonate particles (1) contained in the firing sheet decompose. to generate carbon dioxide gas and form an inert carbon dioxide layer (6) between the cemented carbide (5) and the setter (4). Therefore, direct contact between the cemented carbide (5) and the setter (4) is prevented, and the cemented carbide (5) is prevented from coming into direct contact with the setter (4).
5) and the setter (4), there is no possibility that a small amount of oxygen in the atmosphere will enter the atmosphere, and the occurrence of cracks due to oxygen entering from the contact surface as in the conventional case is completely prevented.
また、焼成用シート中に含まれる炭酸塩の粒子（１）は
かなりの高温領域まで熱的に安定な物質であるから敷粉
としての作用をも有するうえ、有機バインダー（２）と
ａ練されているので焼成用シートの表面は平滑であり、
従来のように超硬合金（５）の表面に凹凸が生ずること
がない。更に本発明のＭＥ用レシート予め製作しておく
ことができ、使用時には単にセッター（４）の表面に敷
くだけでよいから、焼結工程の自動化が可能となり、ま
た従来のようにカーボンが製品に付着したり炉内に１敗
して汚れ易いとの欠点も解消することができる。In addition, the carbonate particles (1) contained in the baking sheet are thermally stable substances up to a considerably high temperature range, so they act as a bedding powder and are also mixed with the organic binder (2). The surface of the baking sheet is smooth because of the
Unlike conventional methods, unevenness does not occur on the surface of the cemented carbide (5). Furthermore, the receipt for ME according to the present invention can be made in advance, and when used, it is only necessary to place it on the surface of the setter (4), which makes it possible to automate the sintering process and prevent carbon from entering the product as in the past. It is also possible to eliminate the drawback that it is easy to get dirty due to adhesion or staining inside the furnace.
（実施例）
実施例１
平均粒径２，５ μの１１ｇＣ０，の粒子を有機バイン
ダーであるＰＶＡ中に５０重重量混練したものを厚さ２
００μのシート状に成形し焼成用シートとした。この焼
成用シートをカーボン製のセンターの表面に敷き、その
上に直径３０＋ｍ、厚さ１０鴫、重量１００ｇの超硬合
金を載せて真空炉中において１５００’Ｃで焼結した。(Example) Example 1 11 g of particles with an average particle size of 2.5 μm were kneaded in PVA, which is an organic binder, at a thickness of 2.
It was molded into a sheet shape of 00μ and used as a sheet for firing. This sintering sheet was spread on the surface of a carbon center, and a cemented carbide having a diameter of 30+ m, a thickness of 10 m, and a weight of 100 g was placed thereon and sintered at 1500'C in a vacuum furnace.
この結果、焼結された製品に浸炭現象、脱炭現象、罵れ
等は認められず、また焼結された製品の反りは１０個丁
均で０．２＋ｌ１ｍであった。これに対し２て同〜・の
超硬合金を従来の有機バインダーとカーボン粉末との混
練物を刷毛塗り等により塗布したセッターを用いＣＩＡ
枯したところ、焼結された製品にカーボンの付着が発生
し５、また製品の反りは０５閣で２．５倍の大きさとな
った。As a result, no carburization, decarburization, or scuffing was observed in the sintered products, and the average warpage of 10 sintered products was 0.2+l1 m. On the other hand, CIA was applied to the same cemented carbide using a setter coated with a conventional kneaded mixture of organic binder and carbon powder by brush coating.
When dried, carbon adhesion occurred on the sintered product5, and the warpage of the product was 2.5 times larger in 2005.
実施例２
平均粒径２．５１１のＣａＣｌ２ の粒子を１１機バイ
ンダーであるＰＶＢ中に２０重Ｖ％混練したものを厚さ
４０μのＰＶＢ フィルムの両面ζこ片面ｌＪさが３０
μとなるよ・）にコーティングし、焼成用−／−トとし
た。この焼成用シートをカーボン製のセンターの表面に
敷き、３０ Ｘ ３０ Ｘ ８ ａｎの・１法で重量が
１０５８の超硬合金を非酸化性雰囲気が中で焼結した。Example 2 CaCl2 particles with an average particle size of 2.511 were kneaded at 20% by weight in PVB as a binder, and a PVB film with a thickness of 40μ was mixed with both sides of the PVB film, and one side of it had a lJ of 30
It was coated with μ) and used for firing. This sintering sheet was spread on the surface of a carbon center, and a cemented carbide having a weight of 1058 was sintered in a non-oxidizing atmosphere using the 30 x 30 x 8 an.1 method.
この結果、焼結された製品の汚れはなく、また焼結され
た製品の対角線方向の反りは１０個平均で０．０５ｍで
あった。これに対して同一の超硬合金を従来法により同
−茶杓で焼結したとごろ、製品にカーボンの０省が発生
し、また製品の反りは０．１９閣と約４侑であった。As a result, there was no stain on the sintered products, and the warp in the diagonal direction of the 10 sintered products was 0.05 m on average. On the other hand, when the same cemented carbide was sintered using the same tea scoop using the conventional method, no carbon was produced in the product, and the warpage of the product was 0.19 degrees, about 4 degrees.
（発明の効果）
本発明は以」−に説明とまたように、炭酸塩の粒子を有
機バインダー中に分散させることにより焼結時に超硬合
金とセッターとの接触面に炭酸ガスの層を形成させ、５
両者の直接接触を防止１７で浸炭現象、脱炭現象、酸素
侵入によるクランクの発生等をジノ化″４−ることかで
きるものである。また本発明によれば、従来のように超
硬合金の表面に凹凸や６れを７１． ＬＳることかない
うえに、焼結［稈の自動化を図ることも可能である。よ
って本発明は従来の欠点を解決Ｅ−たものとして、業界
に寄辱するところは）〜めで人である。(Effects of the Invention) As explained below, the present invention forms a layer of carbon dioxide gas on the contact surface between the cemented carbide and the setter during sintering by dispersing carbonate particles in an organic binder. let me, 5
By preventing direct contact between the two, it is possible to prevent carburization, decarburization, crank formation due to oxygen intrusion, etc. According to the present invention, it is possible to prevent carburization, decarburization, and the occurrence of cranks due to oxygen intrusion. In addition, it is possible to automate the sintering process.Therefore, the present invention is a contribution to the industry as a solution to the conventional drawbacks. The place to do it) is a happy person.
第１図は第１の発明を示す断面図、第２図は第２の発明
を示す断面図、第３図は使用状態を示す模式的に示す側
面図である。
（１）：炭酸塩の粒子、（２）；有機バインダー（３）
：有機フィルム。
第１図
丁 綺 １Ｉｔｉ 正 書（自発）
第２図
１、、．１１件の表示
平成１年特 許 願第２０５９３号
２、発明の名称 焼成用シート
３、補正をする者
事件との関係 特許出願人
第３図
４、代理人
くほか１名）
明細書の発明の詳細な説明の欄
１：Ｘ１す基のね号。
２： ＊４、ｕ４！−ｑ−
３：享１拷史フィＩレム。FIG. 1 is a sectional view showing the first invention, FIG. 2 is a sectional view showing the second invention, and FIG. 3 is a schematic side view showing the state of use. (1): carbonate particles, (2); organic binder (3)
: Organic film. Figure 1: 1Iti Original text (spontaneous) Figure 2: 1, . 11 indications 1999 Patent Application No. 20593 2, Title of the invention: Sheet for firing 3, Relationship with the case by the person making the amendment: Patent applicant (Figure 3, 4, agent and 1 other person) Invention in the specification Detailed explanation column 1: X1 base number. 2: *4, u4! -q- 3: Kyo 1 torture history film.
Claims (1)
発生する炭酸塩の粒子（１）を有機バインダー（２）中
に分散させシート状としたことを特徴とする焼成用シー
ト。 ２、熱的に安定であるが高温に加熱されると炭酸ガスを
発生する炭酸塩の粒子（１）を有機バインダー（２）中
に分散させたものを、有機フィルム（３）の表面にコー
ティングしたことを特徴とする焼成用シート。[Claims] 1. Carbonate particles (1), which are thermally stable but generate carbon dioxide gas when heated to high temperatures, are dispersed in an organic binder (2) and formed into a sheet. Sheet for firing. 2. Carbonate particles (1), which are thermally stable but generate carbon dioxide gas when heated to high temperatures, are dispersed in an organic binder (2) and coated on the surface of an organic film (3). A baking sheet that is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020593A JPH0670241B2 (en) | 1989-01-30 | 1989-01-30 | Baking sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020593A JPH0670241B2 (en) | 1989-01-30 | 1989-01-30 | Baking sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02200704A true JPH02200704A (en) | 1990-08-09 |
| JPH0670241B2 JPH0670241B2 (en) | 1994-09-07 |
Family
ID=12031555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1020593A Expired - Lifetime JPH0670241B2 (en) | 1989-01-30 | 1989-01-30 | Baking sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0670241B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082949A (en) * | 2021-10-08 | 2022-02-25 | 厦门金鹭特种合金有限公司 | Interlayer for high-temperature sintering of hard alloy and manufacturing method thereof |
-
1989
- 1989-01-30 JP JP1020593A patent/JPH0670241B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082949A (en) * | 2021-10-08 | 2022-02-25 | 厦门金鹭特种合金有限公司 | Interlayer for high-temperature sintering of hard alloy and manufacturing method thereof |
| CN114082949B (en) * | 2021-10-08 | 2024-02-20 | 厦门金鹭特种合金有限公司 | Interlayer for high-temperature sintered hard alloy and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0670241B2 (en) | 1994-09-07 |
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