JPS5810963B2 - Continuous sintering furnace for powder metallurgy - Google Patents
Continuous sintering furnace for powder metallurgyInfo
- Publication number
- JPS5810963B2 JPS5810963B2 JP53106754A JP10675478A JPS5810963B2 JP S5810963 B2 JPS5810963 B2 JP S5810963B2 JP 53106754 A JP53106754 A JP 53106754A JP 10675478 A JP10675478 A JP 10675478A JP S5810963 B2 JPS5810963 B2 JP S5810963B2
- Authority
- JP
- Japan
- Prior art keywords
- zone
- burn
- sintering
- gas
- treated material
- 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.)
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Description
【発明の詳細な説明】
この発明は、成形部品の潤滑剤等の除去（以下、単にバ
ーンオフと記す。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the removal of lubricants, etc. from molded parts (hereinafter simply referred to as burn-off).
）時間の短縮と、保護雰囲気ガスの消費量の低減を図っ
た粉末冶金の連続式焼結炉に関する。) Concerning a continuous sintering furnace for powder metallurgy that reduces time and consumption of protective atmosphere gas.
焼結部品は、経済性、寸法精度に優れていることから、
自動車部品を中心として、その生産量は近年飛躍的に増
加し、現在多量生産可能な焼結炉の出現が待たれている
。Sintered parts are economical and have excellent dimensional accuracy, so
The production volume of automotive parts, mainly, has increased dramatically in recent years, and the emergence of a sintering furnace capable of mass production is currently awaited.
ところで、一般に粉末冶金の焼結工程は、（１）粉末冶
金をプレスする際に使用する潤滑剤（ステアリン酸亜鉛
等）を加熱することにより気化させ除去するバーンオフ
工程、（２）潤滑剤を除去した成形部品を保護雰囲気中
で加熱し、焼結させる焼結工程、（３）焼結された部品
を大気中で酸化しない温度まで保護雰囲気中で冷却する
冷却工程からなっている。By the way, the sintering process of powder metallurgy generally consists of (1) a burn-off process in which the lubricant (zinc stearate, etc.) used when pressing the powder metallurgy is vaporized and removed by heating, and (2) the lubricant is removed. (3) a cooling step in which the sintered part is cooled in the protective atmosphere to a temperature at which it will not oxidize in the atmosphere;
そして、上記各工程中において、上記バーンオフ工程に
おける潤滑剤の除去不足、焼結工程時の保護雰囲気の乱
れ等が生じると、成形部品等の処理材に“フクレ”等の
肌荒が発生する。During each of the above steps, if insufficient removal of the lubricant in the burn-off step, disturbance of the protective atmosphere during the sintering step, etc. occur, roughness such as "blister" will occur in the treated material, such as a molded part.
そこで、従来の焼結炉においては、処理材の肌荒を防止
するために、処理材を取囲む保護雰囲気について厳重な
制限を必要とする関係上、直火式燃焼加熱方式は一切採
用し得す、このため、上記（１）のバーンオフ工程は、
保護雰囲気中で間接加熱により長時間にわたって行う必
要があり、炉長も長く、しかも、保護雰囲気ガスも大量
に必要となっていた。Therefore, in conventional sintering furnaces, direct combustion heating methods cannot be used at all because strict restrictions are required on the protective atmosphere surrounding the treated material in order to prevent the surface of the treated material from becoming rough. Therefore, the burn-off process in (1) above is
It was necessary to conduct the process for a long time by indirect heating in a protective atmosphere, the length of the furnace was long, and a large amount of protective atmosphere gas was required.
また、焼結炉出口部のシールは、フレームカーテン方式
、あるいは、アスベストシート吊下げ方式等のシール機
構により行うようになっているため、充分なシール効果
がなく、保護雰囲気ガスの消費量が増大する欠点があっ
た。In addition, since the exit of the sintering furnace is sealed using a sealing mechanism such as a frame curtain method or an asbestos sheet hanging method, there is no sufficient sealing effect and the consumption of protective atmosphere gas increases. There was a drawback.
更に、フレームカーテン方式のシールの場合、処理材が
炉出口で加熱されるので、処理材の表面が酸化、着色す
る危険があった。Furthermore, in the case of a flame curtain type seal, the treated material is heated at the furnace outlet, so there is a risk that the surface of the treated material will be oxidized and colored.
この発明は、上記欠点に鑑みてなされたものであって、
その目的は、連続焼結炉におけるバーンオフ帯に直火式
バーナを配置する一方、冷却帯の抽出端部に保護雰囲気
ガスをシール気体とする気体静圧シール機構を設けるこ
とにより、上記バーンオフ帯を直火式バーナの燃焼生成
ガスと炉内保護雰囲気ガスとの混合雰囲気とし、処理材
を直火式バーナにて加熱し、バーンオフ時間の短縮と調
整雰囲気ガスの消費量の大幅な減少を図ることのできる
粉末冶金の連続式焼結炉を提供しようとするものである
。This invention was made in view of the above drawbacks, and
The purpose of this is to place a direct-fired burner in the burn-off zone of a continuous sintering furnace, and to install a gas static pressure sealing mechanism that uses a protective atmosphere gas as a sealing gas at the extraction end of the cooling zone. To create a mixed atmosphere of the combustion generated gas of the direct-fired burner and the protective atmosphere gas inside the furnace, and heat the treated material with the direct-fired burner, thereby shortening the burn-off time and significantly reducing the consumption of adjusted atmosphere gas. The purpose is to provide a powder metallurgy continuous sintering furnace that can perform the following steps.
以下、この発明を図面に示す一実施例で詳細に説明する
。Hereinafter, this invention will be explained in detail with reference to an embodiment shown in the drawings.
第１図は、たとえば、鉄系粉末冶金の連続式焼結炉の全
体構成を示す縦断面図であって、炉本体１内には、処理
材装入口１ａ近傍位置および抽出口１ｂ近傍位置のロー
ラ２，３間に巻装されたメツシュベルト４が延在してお
り、このメツシュベルト４は、駆動ローラ５により装入
口１ａ側から抽出口１ｂ側へと周回するようになってい
る。FIG. 1 is a longitudinal cross-sectional view showing the overall configuration of a continuous sintering furnace for iron-based powder metallurgy, for example. A mesh belt 4 wound around the rollers 2 and 3 extends, and the mesh belt 4 is rotated by a drive roller 5 from the loading port 1a side to the extraction port 1b side.
炉本体１内における装入口１ａ側には、所定間隔をもっ
て複数の直火式バーナ６．６を設けて、上記メツシュベ
ルト４により搬送されてくる処理材（図示せず。A plurality of direct-fired burners 6.6 are provided at predetermined intervals on the side of the charging port 1a in the furnace body 1, and the treated material (not shown) is conveyed by the mesh belt 4.
）の潤滑剤を除去するバーンオフ帯Ａを構成している。) constitutes a burn-off zone A that removes lubricant.
そして、上記バーンオフ帯Ａと第一の中間扉７を介して
連設した抽出口１ｂ側部分には、一定距離にわたって加
熱手段として複数の電熱ヒータ８を設けて、バーンオフ
工程を終了した上記処理材の加熱・焼結を行う焼結帯Ｂ
を構成している。A plurality of electric heaters 8 are provided as heating means over a certain distance on the side of the extraction port 1b, which is connected to the burn-off zone A via the first intermediate door 7, so that the treated material that has completed the burn-off process is provided with a plurality of electric heaters 8 as heating means. Sintering zone B for heating and sintering
It consists of
なお、この場合、焼結帯Ｂにおける上記第一の中間扉７
から所定間隔をおいた位置に、第二の中間扉９を設けて
、その間の温度を焼結帯Ｂ内の温度よりも少し低目の温
度とした予熱帯Ｂ′を構成しておけば、バーンオフ帯Ａ
から焼結帯Ｂへの急激な温度変化を防止することができ
る。In this case, the first intermediate door 7 in the sintered zone B
If a second intermediate door 9 is provided at a predetermined distance from the preheating zone B', the temperature therebetween is slightly lower than the temperature in the sintering zone B. Burn-off zone A
A rapid temperature change from the sintered zone B to the sintered zone B can be prevented.
そして、上記焼結帯Ｂおよび予熱帯Ｂ／には、供給口１
０．１０を介して保護雰囲気ガスとして、還元性ガスが
供給されている。The sintering zone B and the preheating zone B/ have a supply port 1.
A reducing gas is supplied as a protective atmosphere gas via a 0.10 mL gas.
さらに、炉本体１内における上記焼結帯Ｂの第三の中間
扉１２を介して連設した抽出口１ｂ側部分には、所定距
離にわたって、メツシュベルト４により搬送されてくる
焼結工程終了後の処理材を還元性雰囲気内で除冷する徐
冷帯Ｃを構成している。Further, the sintering zone B in the furnace main body 1 is connected to the extraction port 1b side connected through the third intermediate door 12, and the sintering zone B is placed over a predetermined distance on the side of the extraction port 1b after the completion of the sintering process, which is conveyed by the mesh belt 4. It constitutes an annealing zone C that slowly cools the treated material in a reducing atmosphere.
また、この除冷帯Ｃと抽出口１ｂとの間には、第２図に
示すように、除冷工程を終了した処理材を輻射冷却する
水冷ジャケット１３を上記メツシュベルト４を包囲する
ように設け、かつ、この水冷ジャケット１３内にサイド
循環方式のジェットポンプ１４を設けて、冷却帯りを構
成している。In addition, between this slow cooling zone C and the extraction port 1b, as shown in FIG. 2, a water cooling jacket 13 is provided to surround the mesh belt 4 for radiant cooling of the treated material after the slow cooling process. , and a side circulation type jet pump 14 is provided within this water cooling jacket 13 to constitute a cooling zone.
一方、上記冷却帯りの直後、すなわち、処理材抽出口１
ｂにおける上記メッシュベルト４上部には、炉本体１内
に供給する還元性ガスと同一の雰囲気ガスを用いるシー
ル機構１５を設けている。On the other hand, immediately after the cooling zone, that is, the processing material extraction port 1
A sealing mechanism 15 using the same atmospheric gas as the reducing gas supplied into the furnace body 1 is provided above the mesh belt 4 in b.
このシール機構１５は、第３図に示すように、各下面に
一対のスリンＮ６ａ、１７ａを互いに所定間隔をおき、
かつ、大略逆ハの字状をなすように設けたノズルボック
ス１６．１７により構成しており、各ノズルボックス１
６．１７内に上記圧送ポンプ１１から還元性ガスがコン
トロールバルブ１８ａ、１８ａを介して供給される。As shown in FIG. 3, this sealing mechanism 15 includes a pair of sulins N6a and 17a arranged at a predetermined distance from each other on each lower surface.
In addition, it is composed of nozzle boxes 16 and 17 provided in a roughly inverted V shape, and each nozzle box 1
6.17, reducing gas is supplied from the pressure pump 11 via the control valves 18a, 18a.
そして、上記一対のスリンｈ１６ａ、１７ａから還元性
ガスをそれぞれ互いに前方において斜交するように、メ
ッシュベルト４下部に設けた底板１９に向けて吹き付け
、対をなすガス流Ｒ，Ｒ間に、炉本体１内圧よりも高い
静圧域Ｐを形成させる。Then, the reducing gases from the pair of sulins h16a and 17a are blown toward the bottom plate 19 provided at the bottom of the mesh belt 4 so as to diagonally cross each other in front of each other, and between the pair of gas flows R and R, A static pressure region P higher than the internal pressure of the main body 1 is formed.
上記構成において、いま、駆動ローラ５を駆動してメツ
シュベルト４を炉本体１の装入口１ａ側から抽出口１ｂ
側へと周回させ、かつ、保護雰囲気ガス、すなわち、還
元性ガスを予熱帯Ｂ′、焼結帯Ｂ１徐冷帯Ｃへ供給して
炉本体１内に充満させるとともに、圧送ポンプ１１を駆
動して、還元性ガスを各ノズルボックス１６．１７に供
給する。In the above configuration, the driving roller 5 is now driven to move the mesh belt 4 from the charging port 1a side of the furnace body 1 to the extraction port 1b.
At the same time, a protective atmosphere gas, that is, a reducing gas is supplied to the preheating zone B', the sintering zone B1, and the slow cooling zone C to fill the furnace body 1, and the pressure pump 11 is driven. Then, reducing gas is supplied to each nozzle box 16,17.
これにより、各ノズルボックス１６．１７の一対のスリ
ンＮ６ａ、１７ａから還元性ガスがそれぞれ互いに内角
方向に、底板１９に向けて吹き付けられ、対をなすガス
流Ｒ，Ｒ間に、炉本体１内圧よりも高い静圧域Ｐが形成
される。As a result, the reducing gases are blown from the pair of sulins N6a and 17a of each nozzle box 16.17 toward the bottom plate 19 in the inner angle direction to each other, and between the pair of gas flows R and R, the internal pressure of the furnace main body 1 is A static pressure region P higher than that is formed.
したがって、炉本体１内還元性雰囲気ガスの抽出口１ｂ
側からの炉本体１外への流出ならびに外気の侵入は１泪
止されるとともに、高い静圧域Ｐと炉本体１側の上記ガ
ス流によって、炉本体１内還元性雰囲気の装入口１ａ側
への安定した雰囲気流れが確保される。Therefore, the extraction port 1b for the reducing atmosphere gas in the furnace body 1
Outflow to the outside of the furnace body 1 from the side and intrusion of outside air are prevented, and the high static pressure area P and the gas flow on the furnace body 1 side reduce the reducing atmosphere inside the furnace body 1 from the charging port 1a side. A stable atmosphere flow is ensured.
つぎに、バーナ６、電熱ヒータ８を作動し、水冷ジャケ
ット１３およびジェットポンプ１４を作動したのちに、
あらかじめ、プレス工程でプレスされた処理材（図示せ
ず。Next, after operating the burner 6 and electric heater 8, and operating the water cooling jacket 13 and jet pump 14,
A treated material (not shown) that has been pressed in advance in a pressing process.
）を、メツシュベルト４上に載置して、装入口１ａから
炉本体１内に搬入する。) is placed on the mesh belt 4 and carried into the furnace main body 1 through the charging port 1a.
そして、処理材が、まず、最初にバーンオフ帯Ａに入る
と、処理材は、バーナ６により空気不足の状態で、第４
図のグラフで示すように、約６００〜８００°Ｃに加熱
される。When the treated material first enters the burn-off zone A, the treated material is transported to the fourth
It is heated to about 600-800°C, as shown in the graph of the figure.
と同時に、このときの生成ガスに上記した装入口１ａ側
に流れる還元性雰囲気が混合されて、バーンオフ帯Ａの
保護雰囲気は、上記処理材のプレス時の潤滑剤であるス
テアリン酸亜鉛に酸化性をもち、かつ、処理材、すなわ
ち、鉄系のものに対しては還元性である雰囲気組成に調
整される。At the same time, the gas generated at this time is mixed with the reducing atmosphere flowing toward the charging port 1a, and the protective atmosphere in the burn-off zone A becomes oxidizing to zinc stearate, which is a lubricant during pressing of the treated material. The atmosphere is adjusted to have a composition that is reducing to the treated material, that is, iron-based materials.
したがって、潤滑剤であるステアリン酸亜鉛は、最小限
の保護雰囲気ガスによって、加熱雰囲気による酸化と気
化作用により、処理材から短時間で除去され、処理材の
肌荒れ等が防止される。Therefore, zinc stearate, which is a lubricant, is removed from the treated material in a short period of time by oxidation and vaporization by the heated atmosphere with a minimum amount of protective atmosphere gas, and roughening of the surface of the treated material is prevented.
しかも、炉内の還元性雰囲気は、抽出端部に形成された
高い静圧域Ｐと、炉本体１側のシールガス流れにより、
装入口１ａ側に常に流れているため、バーンオフ帯の汚
染された雰囲気はバーンオフ帯に滞留することなく速や
かに装入口１ａから排出され、焼結帯Ｂへの流入も確実
に防止される。Moreover, the reducing atmosphere inside the furnace is created by the high static pressure area P formed at the extraction end and the flow of sealing gas on the side of the furnace body 1.
Since it always flows to the charging port 1a side, the contaminated atmosphere in the burn-off zone is quickly discharged from the charging port 1a without being retained in the burn-off zone, and it is reliably prevented from flowing into the sintering zone B.
つぎに、上記のようにして、バーンオフ工程の終了した
処理材は、メツシュベルト４により、予熱帯Ｂ′に搬送
されて、第４図のグラフで示すように、バーンオフ帯Ａ
と焼結帯Ｂとの温度間における所定温度に加熱される。Next, the treated material that has undergone the burn-off process as described above is transported to the preheating zone B' by the mesh belt 4, and as shown in the graph of FIG.
and sintering zone B to a predetermined temperature.
ここで、処理材は予熱帯Ｂ′において気孔が急激に埋ま
る温度以下に保たれ、残りの潤滑剤が完全に除去される
とともに、処理材は次工程の焼結帯Ｂ−搬送されて、第
４図のグラフで示すように、約１１００℃〜１１５０℃
で加熱焼結される。Here, the treated material is kept at a temperature below which the pores are rapidly filled in the preheating zone B', and the remaining lubricant is completely removed, and the treated material is transported to the next step, the sintering zone B. As shown in the graph in Figure 4, approximately 1100℃ to 1150℃
is heated and sintered.
なお、予熱帯Ｂ′を設けない場合の加熱温度は、第４図
において点線で示すようになる。The heating temperature in the case where the preheating zone B' is not provided is as shown by the dotted line in FIG.
つづいて、焼結工程が終了した処理材は、メツシュベル
ト４により徐冷帯Ｃに搬入されて、約８００℃程度まで
冷却された後に、冷却帯りに搬入されて、水冷ジャケッ
ト１３による輻射冷却とジェットポンプ１４、炉内雰囲
気の流れによる対流冷却との相乗効果によって、煤の発
生がおさえられながら冷却される。Subsequently, the treated material that has undergone the sintering process is transported to an annealing zone C by a mesh belt 4, where it is cooled to about 800°C, and then transported to a cooling zone where it is radiantly cooled by a water cooling jacket 13. Due to the synergistic effect of the jet pump 14 and convection cooling caused by the flow of the atmosphere in the furnace, cooling is achieved while suppressing soot generation.
そして、第４図のグラフで示すように、処理材の温度が
約１５０℃程度となった時点で、処理材はメツシュベル
ト４により抽出口１ｂから完成品として炉本体１外部に
取り出される。Then, as shown in the graph of FIG. 4, when the temperature of the treated material reaches about 150° C., the treated material is taken out from the extraction port 1b by the mesh belt 4 to the outside of the furnace main body 1 as a finished product.
なお、上記実施例においては、処理材の搬送手段として
、メツシュベルト４を用いた場合について説明したが、
トレイブツシャ方式、ウオーキングビーム方式やローラ
ハース方式のものでも同様な作用効果を得ることは言う
までもない。In addition, in the above embodiment, a case was explained in which a mesh belt 4 was used as a means for conveying the processing material.
It goes without saying that similar effects can be obtained with tray pusher type, walking beam type and roller hearth type.
さらに、焼結帯の加熱手段として、電熱ヒーターを用い
た場合について説明したが、ラジアントチューブバーナ
、マツフル方式等の間接加熱方式でも同様の作用効果を
得ることは言うまでもない。Furthermore, although the case has been described in which an electric heater is used as a means for heating the sintered zone, it goes without saying that similar effects can be obtained by using indirect heating methods such as a radiant tube burner or a Matsufuru method.
以上のように、この発明によれば、装入端部から装入さ
れた処理材をバーンオフ帯において保護雰囲気ガスによ
り還元性に保持した状態で、直火式バーナにより加熱し
て、バーンオフを行なうようにしであるので、従来の吸
熱ガス雰囲気を炉内に充満させ、間接加熱方式によるバ
ーンオフ帯に比し、バーンオフ時間を約６０％に短縮す
ることができるとともに、冷却帯の処理材抽出端部に、
ノズルボックスに供給される保護雰囲気ガスを大略逆ハ
の字状に設けた一対のノズルから噴出させてガス流間に
形成される静圧域によって炉本体内部と外部とをシール
するシール機構を設けているので、炉内雰囲気に、装入
側に向けて流れる雰囲気流れを形成させることができ、
バーンオフ帯が大量のバーナからの生成ガスと保護雰囲
気ガスにてパージされ、スムーズにバーンオフされ、処
理材の肌荒れ等を防止でき、良質の製品を得ることがで
きる。As described above, according to the present invention, the treated material charged from the charging end is maintained in a reducing state by the protective atmosphere gas in the burn-off zone, and is heated by a direct burner to perform burn-off. This allows the furnace to be filled with a conventional endothermic gas atmosphere, reducing the burn-off time to approximately 60% compared to the burn-off zone using the indirect heating method. To,
A sealing mechanism is provided that seals the inside and outside of the furnace body by ejecting the protective atmosphere gas supplied to the nozzle box from a pair of nozzles arranged in a roughly inverted V shape, and creating a static pressure area in the gas flow. Therefore, an atmosphere flow can be formed in the furnace atmosphere that flows toward the charging side.
The burn-off zone is purged with a large amount of generated gas from the burner and a protective atmosphere gas, resulting in smooth burn-off, preventing roughening of the treated material, and producing high-quality products.
また、保護雰囲気ガス量を従来炉に比較して５０％程度
減少できる。Additionally, the amount of protective atmosphere gas can be reduced by about 50% compared to conventional furnaces.
第１図はこの発明の一実施例の全体構成を示す縦断面図
、第２図は第１図の１−１線切断図、第３図はシール機
構の拡大図、第４図は各帯の温度状態を示すグラフであ
る。
１……炉本体、１ａ……装入口、１ｂ……抽出口、４…
…メツシユベルト、６……直火式バーナ、８……電熱ヒ
ーク、１０……雰囲気ガス供給口、１５……シ一ル機構
、Ａ……バーンオフ帯、 Ｂ′……予熱帯、Ｂ……焼結
帯、Ｃ……徐冷帯、Ｄ……冷却帯。Fig. 1 is a vertical sectional view showing the overall configuration of an embodiment of the present invention, Fig. 2 is a cutaway view taken along the line 1-1 in Fig. 1, Fig. 3 is an enlarged view of the sealing mechanism, and Fig. 4 shows each band. It is a graph showing the temperature state of. 1...furnace body, 1a...charging port, 1b...extraction port, 4...
...Mesh belt, 6... Direct fire burner, 8... Electric heat heat, 10... Atmosphere gas supply port, 15... Seal mechanism, A... Burn-off zone, B'... Preheating zone, B... Burning Tie, C... slow cooling zone, D... cooling zone.
Claims (1)
状態で加熱する直火式バーナを配置したバーンオフ帯と
、電熱ヒータもしくは、間接加熱手段を配設した焼結帯
と、冷却帯とを順次連通させて設けるとともに、上記焼
結帯に保護雰囲気ガス供給口を設ける一方、上記冷却帯
の処理材抽出端部に、一対のノズルが大略逆ハの字状に
配置されたノズルボックスからなるシール機構を設けた
ことを特徴とする粉末冶金の連続式焼結炉。1. A burn-off zone equipped with a direct burner that heats the treated material charged from the charging end while maintaining it in a reducing state, a sintering zone equipped with an electric heater or indirect heating means, and a cooling zone. A protective atmosphere gas supply port is provided in the sintering zone, and a pair of nozzles are arranged in a roughly inverted V-shape at the processing material extraction end of the cooling zone. A continuous sintering furnace for powder metallurgy, characterized by being equipped with a sealing mechanism consisting of a box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53106754A JPS5810963B2 (en) | 1978-08-30 | 1978-08-30 | Continuous sintering furnace for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53106754A JPS5810963B2 (en) | 1978-08-30 | 1978-08-30 | Continuous sintering furnace for powder metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5534647A JPS5534647A (en) | 1980-03-11 |
| JPS5810963B2 true JPS5810963B2 (en) | 1983-02-28 |
Family
ID=14441690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53106754A Expired JPS5810963B2 (en) | 1978-08-30 | 1978-08-30 | Continuous sintering furnace for powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810963B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106219A1 (en) * | 1990-02-27 | 1991-09-12 | Kobe Steel Ltd | Sinter powder with increased iron content - gives prods. of improved dimensional stability and mechanical properties,increasing mfg. efficiency |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS574863Y2 (en) * | 1978-12-18 | 1982-01-29 | ||
| JPS57192202A (en) * | 1981-05-22 | 1982-11-26 | Toyota Motor Corp | Rapid manufacturing method of sintered product |
| DE3200582C1 (en) * | 1982-01-12 | 1983-04-07 | Heinrich, Emil, 7054 Korb | Process for removing lubricants from molded parts pressed from metal powder and device for carrying out the process |
| US4655853A (en) * | 1982-08-09 | 1987-04-07 | Federal-Mogul Corporation | Method for making powder metal forging preforms of high-strength ferrous-base alloys |
| JPS59200704A (en) * | 1983-04-28 | 1984-11-14 | Tamagawa Kikai Kk | Heating method of continuous sintering furnace |
| JP5995081B2 (en) * | 2012-12-26 | 2016-09-21 | 東海高熱工業株式会社 | Continuous firing furnace |
| CN106270505A (en) * | 2015-06-12 | 2017-01-04 | 成都锦粼科技有限公司 | A kind of cooling processing method of powder metallurgical sintering process |
| AT523094B1 (en) * | 2019-10-15 | 2022-11-15 | Miba Sinter Austria Gmbh | sinter furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5127210U (en) * | 1974-08-16 | 1976-02-27 |
-
1978
- 1978-08-30 JP JP53106754A patent/JPS5810963B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5127210U (en) * | 1974-08-16 | 1976-02-27 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106219A1 (en) * | 1990-02-27 | 1991-09-12 | Kobe Steel Ltd | Sinter powder with increased iron content - gives prods. of improved dimensional stability and mechanical properties,increasing mfg. efficiency |
| DE4106219C2 (en) * | 1990-02-27 | 1994-06-09 | Kobe Steel Ltd | Sintered steel powder for dimensionally stable sintered bodies |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5534647A (en) | 1980-03-11 |
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