JPH01294806A - Production of degreased body and jig for degreasing - Google Patents
Production of degreased body and jig for degreasingInfo
- Publication number
- JPH01294806A JPH01294806A JP63124851A JP12485188A JPH01294806A JP H01294806 A JPH01294806 A JP H01294806A JP 63124851 A JP63124851 A JP 63124851A JP 12485188 A JP12485188 A JP 12485188A JP H01294806 A JPH01294806 A JP H01294806A
- Authority
- JP
- Japan
- Prior art keywords
- degreasing
- molded body
- jig
- degreased
- molded
- 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
- 238000005238 degreasing Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 abstract description 5
- 239000007858 starting material Substances 0.000 abstract 2
- 238000009826 distribution Methods 0.000 description 19
- 239000007789 gas Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009692 water atomization Methods 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、有機バインダを含む金属、合金又はセラミッ
クスより成形した成形体を加熱脱脂して脱脂体を製造す
る脱脂体の製造方法及び脱脂のときに成形体を支持する
に使用する脱脂用治具に関する。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for manufacturing a degreased body by heating and degreasing a molded body formed from a metal, alloy, or ceramic containing an organic binder, and a method for producing a degreased body, and a process for degreasing. It relates to a degreasing jig that is sometimes used to support molded objects.
［従来の技術］
一般に、金属、合金またはセラミックスの焼結体を製造
する工程で焼結前の成形体は粉末を圧縮成形することに
より圧粉体として得られる。これは通常上下方向からパ
ンチで加圧する方法であるため、得られる成形体の形状
としては円柱１円筒のような比較的単純なものに限られ
ている。このような成形体より複雑な形状の製品を得る
には焼結上がりの製品に切削、研削等の後加工を施す必
要がある。[Prior Art] Generally, in the process of manufacturing a sintered body of metal, alloy, or ceramic, a compact before sintering is obtained as a green compact by compression molding powder. Since this is usually a method of pressurizing with a punch from above and below, the shape of the molded product obtained is limited to a relatively simple shape such as a single cylinder. In order to obtain a product with a more complex shape than such a molded body, it is necessary to perform post-processing such as cutting and grinding on the sintered product.
一方で、いわゆるエンジニアリングセラミックス等を中
心とした窯業製品の分野では、原料粉末に５〜２５重量
％の有機バインダーを加え、混合。On the other hand, in the field of ceramic products such as so-called engineering ceramics, 5 to 25% by weight of an organic binder is added to raw material powder and mixed.
混練した後、射出成形または押出成形等により成形して
、複雑形状の成形体を得る成形工程と、脱脂し、脱脂体
を得る脱脂工程と、脱脂体を焼結する焼結工程を経て、
焼結製品とすることが工業的に行なわれ始め、注目され
つつある。After kneading, the mixture is molded by injection molding or extrusion molding to obtain a complex-shaped molded body, a degreasing process to obtain a degreased body, and a sintering process to sinter the degreased body.
Sintered products have begun to be produced industrially and are attracting attention.
また、近年アトマイズ法に代表されるように金属粉末の
製造技術の発展には著しいものがあり、前述のような製
造方法と金属及び合金粉末にも適用することが試みされ
ている。Further, in recent years, there has been remarkable development in metal powder manufacturing technology, as typified by the atomization method, and attempts have been made to apply the above-mentioned manufacturing method to metal and alloy powders.
このような、射出成形法及び押出成形法は、従来におい
ては、プラスチック材料の成形に適用されてきた方法で
あるが、複雑形状のものを精度良く大量に生産できると
いう利点を有するため、金属、合金及びセラミックスの
焼結体で、従来の技術では不可能であった形状のものを
低コストで市場に提供することができる可能性を有して
いる。These injection molding methods and extrusion molding methods have conventionally been applied to molding plastic materials, but because they have the advantage of being able to mass-produce complex shapes with high precision, they are suitable for metals, It has the potential to provide the market with sintered bodies of alloys and ceramics in shapes that were not possible with conventional technology at low cost.
そして、このようなプロセスによって焼結製品を製造す
る上での最大の技術的な問題点は、前述のように粉末に
多電の有機バインダーを加えであることから、これを如
何にして除去するかと言うことであった。成形体の有機
バインダーを除去して脱脂体を生成する工程、即ち脱脂
は加熱によって成形体中の有機バインダーを分解、揮散
させる方法が最も一般的である。加熱によって脱脂を行
なう場合、成形体から揮散した分解ガスが再び成形体の
表面に吸着しないように、この分解カスをすばやく取り
除く必要があり、そのため成形体の周囲には常にキャリ
ヤーガスが流されているのが通例である。The biggest technical problem in manufacturing sintered products using this process is the addition of a polyelectrolytic organic binder to the powder as mentioned above, so how can this be removed? That's what I was saying. The process of removing the organic binder from the molded body to produce a degreased body, ie, degreasing, is most commonly carried out by heating to decompose and volatilize the organic binder in the molded body. When degreasing is performed by heating, it is necessary to quickly remove the decomposition gas that has evaporated from the molded object so that it does not adsorb to the surface of the molded object again, so a carrier gas is constantly flowed around the molded object. It is customary that there be.
［発明が解決しようとする課題］
脱脂工程において成形体は、鉗燃性材料よりなる脱脂用
治具に支持されて置かれる。成形体は脱脂装置内に配置
されているために、脱脂用治具に接していない成形体の
表面部分では成形体からの有機バインダーの分解ガスは
キャリヤーガスにより速やかに取除かれ、常に分解ガス
濃度が不飽和となっているので、成形体表面部分からの
分解ガスの揮散が効率的に行なわれる。一方、脱脂用治
具に接している成形体の表面部分では、分解ガスの揮散
通路が極端に狭くそのため分解ガス濃度が高まり、表面
部分からの分解ガスの揮散が抑制されることになる。そ
の結果として、成形体の上表面部分と、接触した下表面
部分とでは脱脂率に差が生じ、得られた脱脂体はその後
工程の焼結によってそり、割れ等の変形が生じ、歩留り
良く焼結製品を製造することが困難であった。[Problems to be Solved by the Invention] In the degreasing process, the molded body is supported and placed on a degreasing jig made of a combustible material. Since the molded body is placed in the degreasing equipment, the decomposed gas of the organic binder from the molded body is quickly removed by the carrier gas on the surface of the molded body that is not in contact with the degreasing jig, and the decomposed gas is always Since the concentration is unsaturated, the decomposition gas is efficiently volatilized from the surface of the molded article. On the other hand, in the surface portion of the molded body that is in contact with the degreasing jig, the volatilization passage for the decomposed gas is extremely narrow, so that the decomposed gas concentration increases and the volatilization of the decomposed gas from the surface portion is suppressed. As a result, there is a difference in the degreasing rate between the upper surface part of the molded body and the contacting lower surface part, and the obtained degreased body is deformed by warping, cracking, etc. due to the subsequent sintering process, and it is difficult to sinter it with a good yield. It was difficult to produce a coagulated product.
斯る問題点に鑑み本発明の技術課題は、成形体を加熱脱
脂する脱脂方法において、有機バインダーの分解ガスの
成形体への吸着をなくし、成形体から均一に有機バイン
ダーを除去すべく適切な材料で支持して加熱脱脂し脱脂
体を製造する脱脂体の製造方法と、及び、それに使用さ
れる脱脂用治具を提供するものである。In view of such problems, the technical problem of the present invention is to provide an appropriate method for removing the organic binder uniformly from the molded product by eliminating adsorption of the decomposed gas of the organic binder to the molded product in a degreasing method of heating and degreasing the molded product. The present invention provides a method for producing a degreased body by supporting it with a material and heat-degreasing it, and a degreasing jig used therein.
［課題を解決するための手段］
本発明によれば、熱可塑性ポリマーを主成分とする有機
バインダを含む原料粉末を加圧成形してなる成形体を脱
脂して脱脂体を得る脱脂体の製造方法において、上記成
形体を上記成形体と面接触する炭素からなる板部材と共
に加熱脱脂することを特徴とする脱脂体の製造方法が得
られる。[Means for Solving the Problems] According to the present invention, a degreased body is produced by degreasing a molded body obtained by pressure molding a raw material powder containing an organic binder whose main component is a thermoplastic polymer. A method for producing a degreased body is obtained, which comprises heating and degreasing the molded body together with a plate member made of carbon that is in surface contact with the molded body.
本発明によれば、熱可塑性ポリマーを主成分とする有機
バインダを含有する成形体を載置して焼結前に上記成形
体とともに加熱される加熱脱脂する為の脱脂用治具にお
いて、上記成形体を載置する接触面が少なくとも炭素よ
りなることを特徴とする焼結用治具が得られる。According to the present invention, in a degreasing jig for heating and degreasing, in which a molded body containing an organic binder containing a thermoplastic polymer as a main component is placed and heated together with the molded body before sintering, the A sintering jig is obtained in which the contact surface on which the body is placed is made of at least carbon.
即ち本発明者らは、可塑性ポリマー等の有機バインダを
含む原料から押出成形、圧縮成形、射出成形等により製
造した成形体をアルミナ板等の難燃性両人材料よりなる
脱脂用治具上に載置し、キャリヤーガスを送風しながら
加熱脱脂した場合、脱脂用治具と成形体とが接触した表
面部分において、成形体と難燃性両人材料よりなる脱脂
用治具の双方の表面が黒く変色し、この変色が分解ガス
の吸着によって生じた炭素層にも大きく影響される。更
にこのままの状態でこの脱脂体を焼結すると炭素層の付
着した部分が脱脂が不完全であるにもかかわらず他の部
分より焼結が進む様子が見られ、全体として焼結中の脱
脂体の収縮が極めて不均一に進むことにより、そり、割
れ等の変形が生ずることを見い出した。That is, the present inventors placed a molded body manufactured by extrusion molding, compression molding, injection molding, etc. from a raw material containing an organic binder such as a plastic polymer on a degreasing jig made of a flame-retardant material such as an alumina plate. When the molded body is placed on the molded body and heated and degreased while blowing carrier gas, the surfaces of both the molded body and the degreasing jig made of a flame-retardant material are exposed to the surface area where the degreasing jig and the molded body come into contact. The color changes to black, and this color change is greatly influenced by the carbon layer created by the adsorption of decomposed gases. Furthermore, when this degreased body is sintered in this state, it can be seen that the parts to which the carbon layer has adhered are more sintered than other parts, even though the degreasing is incomplete, and the degreased body as a whole is sintered. It was discovered that deformations such as warping and cracking occur due to extremely uneven shrinkage of the material.
このため、脱脂工程において成形体から揮散した分解ガ
スが特に脱脂用治具と接している表面部分において、成
形体の表面に付着すること、及び、脱脂用治具と接して
いる表面部分からも効率的に分解ガスを揮散させること
を検討した。For this reason, the decomposed gas vaporized from the molded product during the degreasing process may adhere to the surface of the molded product, especially in the surface area that is in contact with the degreasing jig, and may also be removed from the surface area that is in contact with the degreasing jig. We investigated how to efficiently volatilize decomposed gas.
その結果、炭素製容器脱脂用治具上に成形体を置き、加
熱脱脂することにより全体が均一に脱脂された脱脂体を
得ることができ、後工程の焼結によっても脱脂体全体が
均一に収縮し、そり、割れ等の変形が生じなくなること
を見い出し、本発明を完成するに致っなのである。As a result, by placing the molded body on a carbon container degreasing jig and degreasing it by heating, it is possible to obtain a degreased body whose entire body is uniformly degreased, and even by sintering in the post-process, the entire degreased body is uniformly degreased. It was discovered that shrinkage, warping, cracking, and other deformations do not occur, leading to the completion of the present invention.
本発明においては、脱脂用治具は、無定形炭素もしくは
グラファイト等の炭素であれば特に材質は限定しないが
、本発明における炭素製脱脂用治具の効果は、炭素の多
気孔性に起因するので気孔率の大きな材質が好ましい０
通常の市販品の気孔率すなわち飽水重量から乾燥重量及
び水中重量をそれぞれ差し引いた重量の比率が１０〜３
０％程度であり、充分に加熱脱脂に使用することができ
る。尚、本発明において、成形体の原料は有機バインダ
ーとして熱可塑性ポリマーを含む金属、合金及びセラミ
ックス粉末等の焼結体製造用の粉末材料であれば良く、
特に限定されない。In the present invention, the material of the degreasing jig is not particularly limited as long as it is carbon such as amorphous carbon or graphite, but the effect of the carbon degreasing jig in the present invention is due to the porous nature of carbon. Therefore, materials with high porosity are preferable.
The porosity of normal commercial products, that is, the ratio of the weight obtained by subtracting the dry weight and the weight in water from the saturated weight, is 10 to 3.
It is approximately 0% and can be sufficiently used for heat degreasing. In the present invention, the raw material for the molded body may be any powder material for producing a sintered body, such as metal, alloy, or ceramic powder containing a thermoplastic polymer as an organic binder.
Not particularly limited.
以下実施例を挙げて詳細に説明する。A detailed explanation will be given below with reference to examples.
［実施例］ 本発明の実施例について図面を参照して説明する。[Example] Embodiments of the present invention will be described with reference to the drawings.
第１図は、第１表の組成の粉末より得られた炭素板上に
置き加熱脱脂をすることにより得られた２市厚みＦ ｅ
−Ｃｏ合金の脱脂体試料の厚み方向の残存炭素の分布
を示すニレクロン１０−ブマイクロアナライザ（ＥＰＭ
Ａ）組成分析写真である。Figure 1 shows the thickness of the two-dimensional area F e obtained by heating and degreasing the powder obtained from the powder having the composition shown in Table 1 by placing it on a carbon plate.
Nireclone 10-B Microanalyzer (EPM) showing the distribution of residual carbon in the thickness direction of a degreased -Co alloy sample
A) Composition analysis photograph.
第 １ 表
、人下弦日
第１図（ａ）は脱脂体の上表面、第１図（ｂ）は表面か
ら約１（８）の深さの部分、第１図（Ｃ）は炭素板と接
した部分である。Table 1, Figure 1 (a) shows the upper surface of the degreased body, Figure 1 (b) shows the part at a depth of about 1 (8) from the surface, and Figure 1 (C) shows the carbon plate. This is the touching part.
これらの写真において、白い斑点は、残存炭素（Ｃ）の
分布を示し、白い斑点の多い個所は、炭素が多く分布し
ていることを示す、この写真から、第１図（ｂ）、第１
図（Ｃ）の脱脂体内部及び脱脂体下表面は残存Ｃの分布
はほぼ等しく、第１図（ａ）の脱脂体上表面は、残存Ｃ
の分布が密である。In these photographs, white spots indicate the distribution of residual carbon (C), and areas with many white spots indicate that carbon is distributed in large quantities.
The distribution of residual C inside the degreased body and the lower surface of the degreased body in Figure (C) is almost equal, and the distribution of residual C on the upper surface of the degreased body in Figure 1 (a) is
The distribution of is dense.
比較の為に、アルミナ板上に置き加熱脱脂を上記同様に
行うことにより得られた脱脂体試料の厚み方向の残存炭
素の分布を調べな、このときのＥＰＭＡ組成分析写真を
第２図に示す。For comparison, examine the distribution of residual carbon in the thickness direction of a degreased sample obtained by placing it on an alumina plate and performing heat degreasing in the same manner as above. The EPMA composition analysis photograph at this time is shown in Figure 2. .
第２図（ａ）及び（ｂ）は脱脂体の上表面の異る２点、
第２図（Ｃ）及び（ｄ）は脱脂体の表面から約１市の深
さの部分の異る２点、第２図（ｅ）および（ｄ）は脱脂
体下表面の異る２点の部分である。Figure 2 (a) and (b) show two different points on the upper surface of the degreased body.
Figures 2 (C) and (d) are two different points at a depth of approximately one city from the surface of the degreased body, and Figures 2 (e) and (d) are two different points on the lower surface of the degreased body. This is the part.
この写真において第２図（ａ）及び（ｂ）の脱脂体上表
面、第２図（Ｃ）及び（ｄ）の内部、第２図（ｅ）及び
（ｄ）の下表面の残存炭素分布が多くなっており、アル
ミナ板と接する部分の脱脂率が接しない部分の脱脂率よ
り明らかに悪くなっている。In this photograph, the residual carbon distribution on the upper surface of the degreased body in Figure 2 (a) and (b), the inside of Figure 2 (C) and (d), and the lower surface in Figure 2 (e) and (d) is shown. The degreasing rate of the part in contact with the alumina plate is clearly worse than the degreasing rate of the part not in contact with the alumina plate.
以上から実施例に係る脱脂体は、上記表面に残存Ｃ分布
が多く、→Ｈ頬井に係る脱脂体と対照的である。また比
較例よりも残存Ｃ分布量の総量が少なく、分布がより均
一であることが判る。From the above, the degreased body according to the example has a large distribution of residual C on the surface, which is in contrast to the degreased body according to the →H cheek well. It can also be seen that the total amount of residual C distribution is smaller than in the comparative example, and the distribution is more uniform.
本発明の実施例に係る焼結体の変形量及び密度について
説明する。The amount of deformation and density of the sintered body according to the example of the present invention will be explained.
第３図は、成形体の脱脂工程を経て焼結した時の変形量
を示す模式断面図である。この図において、焼結用治具
２に載置された焼結上がりの試料変形量は、焼結体の厚
みａに対して、最高値すのａに対する差をａに対する比
率（百分率）で表わした量である（式（１））。FIG. 3 is a schematic cross-sectional view showing the amount of deformation when the molded body is sintered after the degreasing process. In this figure, the amount of deformation of the sample placed on the sintering jig 2 after sintering is expressed as the ratio (percentage) of the difference between the maximum value and a to the thickness a of the sintered body. (Equation (1)).
第２表は、実施例の種々の形状の成形体を脱脂し、焼結
したときの得られた焼結体の変形量と密度を示しこの表
において、成形体は直径５０１ｎ＋。Table 2 shows the amount of deformation and density of the sintered bodies obtained when the molded bodies of various shapes of Examples were degreased and sintered. In this table, the molded bodies had a diameter of 501n+.
厚さＩＩｔＩＩ、直径５０薗、厚さ２Ｌｆｌ＋、直径５
０薗。Thickness IItII, diameter 50 mm, thickness 2Lfl+, diameter 5
0 薗.
厚さ５篤、直径５０市、厚さ１０關の４種の試料につい
て測定されている。Measurements were made on four types of samples: 5 thicknesses, 50 diameters, and 10 thicknesses.
比較の為に、上記と同一組成の粉末より得られたアルミ
ナ板上で焼結した上記のものと同形状のＦｅ−Ｃｏ合金
成形体試料を脱脂し、焼結することによって得られた焼
結体の測定結果も併記した。For comparison, a sintered sample obtained by degreasing and sintering an Fe-Co alloy compact sample having the same shape as the above one, which was sintered on an alumina plate obtained from powder with the same composition as above. Body measurement results are also listed.
この表より、実施例、比較例ともに、薄い成形体はど得
られる焼結体の変形量が大きくなる傾向を示した。This table shows that in both Examples and Comparative Examples, the thinner the molded body, the greater the amount of deformation of the resulting sintered body.
更に、実施例に係る脱脂を経て焼結することにより得ら
れた焼結体のほうが、比較例に係る脱脂を経て焼結する
ことにより得られた焼結体よりも変形量が極めて少ない
（１／１０位）ことが判明した。Furthermore, the amount of deformation of the sintered body obtained by sintering after degreasing according to the example is much smaller than that of the sintered body obtained by sintering after degreasing according to the comparative example (1 /10th place).
本発明の実施例に係る脱脂体及び焼結体は次のように製
造された。Degreased bodies and sintered bodies according to Examples of the present invention were manufactured as follows.
Ｆｅ３０ｗｔ％−Ｃｏ５０ｗｔ％なる組成の合金をアル
ゴンガス雰囲気中で高周波加熱により溶製し、水アトマ
イズ法により平均粒径１０μｍの粉末を作製した。その
酸素濃度を分析したところ約５２００ ｐｐＨであった
９次にその合金粉末を第１表に示す組成により混合、混
練、粉砕し射出成形用の原料を得た。An alloy having a composition of 30 wt% Fe-50 wt% Co was melted by high-frequency heating in an argon gas atmosphere, and powder with an average particle size of 10 μm was produced by water atomization. The oxygen concentration was analyzed and found to be about 5200 ppH.Next, the alloy powder was mixed, kneaded and pulverized according to the composition shown in Table 1 to obtain a raw material for injection molding.
次に、この原料を用い温度１９０℃、ゲージ圧力１００
ｋｇ／−の条件で外径５０間で厚みが１市。Next, using this raw material, the temperature was 190°C and the gauge pressure was 100°C.
kg/- condition, the outer diameter is 50 mm and the thickness is 1 city.
２ ｉｎｎ 、 ５ ｒｒｍ 、 １０ ａｍの成形体
を射出成形により作製した（成形工程）。A molded body of 2 inn, 5 rrm, and 10 am was produced by injection molding (molding process).
これらの成形体を開気孔率２３％の炭素板上に置き、Ｉ
ＯＪ／１Ｎｉｎのアルゴンガス気流中で室温から毎時７
℃の昇温速度で６００℃まで昇温加熱し、６００°Ｃで
２時間保持した後、室温まで冷却した（脱脂工程）０次
にこの様にして得られた脱脂体を真空炉中に投入し、室
温から毎時２００°Ｃの昇温速度で１２００℃まで昇温
し、１０時間保持した後、毎時２０℃の速さで炉中冷却
しな（焼結工程）。These molded bodies were placed on a carbon plate with an open porosity of 23%, and
7/hour from room temperature in OJ/1Nin argon gas flow
The degreased body thus obtained was then heated to 600 °C at a heating rate of °C, held at 600 °C for 2 hours, and then cooled to room temperature (degreasing step).Next, the degreased body thus obtained was placed in a vacuum furnace. Then, the temperature was raised from room temperature to 1200°C at a rate of 200°C/hour, held for 10 hours, and then cooled in a furnace at a rate of 20°C/hour (sintering process).
比較のため成形体をアルミナ板上に置き、同一条件で脱
脂、焼結を行い、焼結体を得た。第１図及び第２図、第
２表はこれらの脱脂工程、焼結工程上りの試料について
測定した結果である。For comparison, a molded body was placed on an alumina plate, and degreased and sintered under the same conditions to obtain a sintered body. Figures 1 and 2 and Table 2 show the results of measurements made on the samples after the degreasing process and sintering process.
［発明の効果］
以上説明したとおり本発明によれば、炭素面を有する脱
脂用治具上に成形体を置き加熱脱脂することにより、脱
脂用治具と接する部分においても脱脂用治具と接しない
他の部分と同様、脱脂が効率的に行なわれ、その結果成
形体全体として、より均一な組成の脱脂体が得られる。[Effects of the Invention] As explained above, according to the present invention, by placing a molded body on a degreasing jig having a carbon surface and degreasing it by heating, the part that comes into contact with the degreasing jig also comes into contact with the degreasing jig. As with other parts that are not treated, degreasing is carried out efficiently, resulting in a degreased body having a more uniform composition as a whole.
したがって、この脱脂体を焼結した場合には、そり、割
れ等の変形を防止することが出来る。Therefore, when this degreased body is sintered, deformations such as warping and cracking can be prevented.
第１図（ａ）は本発明の実施例に係る脱脂方法により脱
脂処理して得られた脱脂体の試料の厚み方向上表面での
残存Ｃの分布を示すＸ線写真、第１図（ｂ）は第１図（
ａ）と同一の試料の厚み方向内部での残存Ｃの分布を示
すＸ線写真、第１図（ｃ）は第１図（ａ）及び第１図（
ｂ）と同一の試料の厚み方向下表面での残存Ｃの分布を
示すＸ線写真、第２図（ａ）は比較例に係る脱脂体の一
試料の厚み方向上表面での残存Ｃの分布を示すＸ線写真
、第２図（ｂ）は比較例に係る脱脂体の他の試料の厚み
方向上表面での残存Ｃの分布を示すＸ線写真、第２図（
ｃ）は第２図（ａ＞と同一の試料の厚み方向内部での残
存Ｃの分布を示すＸ線写真、第２図（ｄ）は第２図（ｂ
）と同一の試料の厚み方向内部での残存Ｃの分布を示す
Ｘ線写真、第２図（ｅ）は第２図（ａ）及び第２図（ｃ
）と同一の試料の厚み方向下表面での残存Ｃの分布を示
すＸ線写真、第２図（ｆ）は第２図（ａ）及び第２図（
ｃ）と同一の試料の厚み方向下表面での残存Ｃの分布を
示すＸ線写真、第３図は、焼結した成形体の変形量の測
定位置及び算出式を示す図である。
メａｘ１１・１
（の
第 １ 図
（ｃ）
第 ２ 図
（ｇｊ
第 ２ 図
（Ｃメ
パＹ ２ 図
ミ、・きに
手続補正書（自発）
平成７年７１７８日
寺許庁長官 吉 １）文 毅 殿
１、事件の表示
昭和６３年特許願第１２４８５１号
２、発明の名称
脱脂体の製造方法及び脱脂用治具
３、補正をする者
事件との関係 特許出願人
名 称 東北金属工業株式会社
４、代理人 〒ｔＯＳ
住 所 東京都港区西新橋１丁目４番１０号Ｂ、補正
の内容
１）明細書の発明の詳細な説明の欄の記載の一部を次の
様に補正する。FIG. 1(a) is an X-ray photograph showing the distribution of residual C on the upper surface in the thickness direction of a sample of a degreased body obtained by degreasing by the degreasing method according to the embodiment of the present invention, and FIG. ) is shown in Figure 1 (
An X-ray photograph showing the distribution of residual C within the thickness direction of the same sample as in a), Fig. 1(c) is the same as Fig. 1(a) and Fig. 1(
An X-ray photograph showing the distribution of residual C on the lower surface in the thickness direction of the same sample as in b), FIG. FIG. 2(b) is an X-ray photograph showing the distribution of residual C on the upper surface in the thickness direction of another sample of the degreased body according to the comparative example.
c) is an X-ray photograph showing the distribution of residual C within the thickness of the same sample as in Fig. 2(a), and Fig. 2(d) is an X-ray photograph showing the distribution of residual C within the thickness direction of the same sample as in Fig. 2(a).
) is an X-ray photograph showing the distribution of residual C within the thickness direction of the same sample, Figure 2(e) is the same as Figure 2(a) and Figure 2(c
Figure 2(f) is an X-ray photograph showing the distribution of residual C on the lower surface in the thickness direction of the same sample as in Figure 2(a) and Figure 2(a).
FIG. 3 is an X-ray photograph showing the distribution of residual C on the lower surface in the thickness direction of the same sample as in c), and is a diagram showing the measurement position and calculation formula for the amount of deformation of the sintered compact. Meax 11.1 (Figure 1 (c) Figure 2 (gj Figure 2 (C Mepa Y 2 Figure Mi, Kini Procedural Amendment (voluntary) 7178/1995 Director General of the Temple Office Yoshi 1) Moon Yi 1, Indication of the case Patent Application No. 124851 of 1988 2, Name of the invention Method for manufacturing a degreasing body and degreasing jig 3, Person making the amendment Relationship with the case Patent applicant name Name Tohoku Metal Industry Co., Ltd. 4. Agent: tOS Address: 1-4-10B Nishi-Shinbashi, Minato-ku, Tokyo Contents of amendment 1) Part of the statement in the column of detailed explanation of the invention in the specification is amended as follows.
Claims (2)
む原料粉末を加圧成形してなる成形体を脱脂して脱脂体
を製造する脱脂体の製造方法において、上記成形体を、
上記成形体と面接触する炭素からなる板部材と共に加熱
脱脂することを特徴とする脱脂体の製造方法。1. In a method for manufacturing a degreased body, the degreased body is produced by degreasing a molded body obtained by pressure molding a raw material powder containing an organic binder containing a thermoplastic polymer as a main component, wherein the molded body is
A method for producing a degreased body, characterized in that heat degreasing is carried out together with a plate member made of carbon that is in surface contact with the molded body.
有する成形体を載置して焼結前に上記成形体とともに加
熱される加熱脱脂する為の脱脂用治具において、上記成
形体を載置する接触面が少なくとも炭素よりなることを
特徴とする脱脂用治具。2. A contact on which the molded body is placed, in a degreasing jig for heating and degreasing the molded body containing an organic binder whose main component is a thermoplastic polymer and heated together with the molded body before sintering. A degreasing jig characterized in that its surface is made of at least carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124851A JPH01294806A (en) | 1988-05-24 | 1988-05-24 | Production of degreased body and jig for degreasing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124851A JPH01294806A (en) | 1988-05-24 | 1988-05-24 | Production of degreased body and jig for degreasing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01294806A true JPH01294806A (en) | 1989-11-28 |
Family
ID=14895664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63124851A Pending JPH01294806A (en) | 1988-05-24 | 1988-05-24 | Production of degreased body and jig for degreasing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01294806A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53120611A (en) * | 1977-03-30 | 1978-10-21 | Sumitomo Electric Ind Ltd | Sintering furnace for powder metallurgy |
-
1988
- 1988-05-24 JP JP63124851A patent/JPH01294806A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53120611A (en) * | 1977-03-30 | 1978-10-21 | Sumitomo Electric Ind Ltd | Sintering furnace for powder metallurgy |
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