JPH02200701A - Vessel for heat-treating iron powder - Google Patents
Vessel for heat-treating iron powderInfo
- Publication number
- JPH02200701A JPH02200701A JP1017528A JP1752889A JPH02200701A JP H02200701 A JPH02200701 A JP H02200701A JP 1017528 A JP1017528 A JP 1017528A JP 1752889 A JP1752889 A JP 1752889A JP H02200701 A JPH02200701 A JP H02200701A
- Authority
- JP
- Japan
- Prior art keywords
- iron powder
- powder
- vessel
- container
- oxide
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 16
- 239000010439 graphite Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 abstract description 13
- 238000000137 annealing Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004663 powder metallurgy Methods 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、容器内に鉄粉を入れ、主に減圧炉を使って、
還元・焼鈍等の熱処理を施し、高品質な鉄粉などを製造
する分野で用いる鉄粉熱処理用容器に関するものである
。[Detailed Description of the Invention] <Industrial Field of Application> The present invention involves placing iron powder in a container and using a vacuum furnace.
The present invention relates to a container for heat treatment of iron powder used in the field of manufacturing high quality iron powder through heat treatment such as reduction and annealing.
〈従来の技術〉
ア）・マイズ鉄粉などを還元・焼鈍（熱処理）して粉末
冶金用の鉄粉を得るには、通常グラファイト製の複数段
のトレイにそれぞれ皿形の容器を赦せ、この容器内に鉄
粉を充填して減圧雰囲気の炉内に入れて加熱し、その後
冷却−排出−粉砕・分級−梱包−出荷する工程をとって
いる。<Prior art> A) In order to obtain iron powder for powder metallurgy by reducing and annealing (heat-treating) maize iron powder, etc., a dish-shaped container is usually placed in a plurality of trays made of graphite. The process is to fill a container with iron powder, heat it in a furnace with a reduced pressure atmosphere, and then cool it, discharge it, crush it/classify it, pack it, and ship it.
ところで、このような従来の鉄粉を皿形容器に入れて還
元・焼鈍するという工程には、次の様な問題点があった
。However, the conventional process of placing iron powder in a dish-shaped container and reducing and annealing it has the following problems.
（１）熱処理時、容器そのものと鉄粉が反応焼結してし
まい、鉄粉を排出する工程で容器から排出できない。(1) During heat treatment, the container itself and the iron powder react and sinter, making it impossible to discharge the iron powder from the container during the process of discharging it.
（２）均一加熱および粉砕性を確保する目的で一般に実
開昭６１−１３７６２９号公報にみられるよ・）に容器
内に人口切壁を設けであるが、これが７１１出を一層困
難にする。(2) For the purpose of ensuring uniform heating and crushability, an artificial cut wall is generally provided in the container as seen in Japanese Utility Model Application No. 61-137629, but this makes it even more difficult to produce 711.
そこで、このような熱処理粉の容器付着を防止するため
に、水溶性の黒鉛を塗布する手段が、特公昭５５−３０
０４４号公報に開示されている。しがし５ながら、容器
には一一船に安価な鉄製容器（ステン１／ス製）が用い
られており、高温熱処理に繰り返し使用しているうちに
、塗布された黒鉛が浸炭し容器が劣化し容器自体の寿命
が著しく低下する問題があった。Therefore, in order to prevent such heat-treated powder from adhering to the container, a method of coating water-soluble graphite was developed in the Japanese Patent Publication Publication No. 55-30.
It is disclosed in the No. 044 publication. However, cheap iron containers (made of stainless steel) are used for the containers, and as they are repeatedly used for high-temperature heat treatment, the coated graphite becomes carburized and the containers become damaged. There was a problem that the container deteriorated and the life of the container itself was significantly shortened.
〈発明が解決しようとする！１題〉
本発明の目的は、鉄粉を容器中に充填し、還元焼鈍等の
熱処理を施した際に、容器と鉄粉の焼結を防止し、鉄粉
の排出を容易ならしめる鉄粉熱処理用容器を提案するこ
とである。<Invention tries to solve! Problem 1> The object of the present invention is to provide iron powder that prevents sintering of the container and iron powder and facilitates the discharge of iron powder when iron powder is filled into a container and subjected to heat treatment such as reduction annealing. The purpose is to propose a container for heat treatment.
また他の目的は、鉄粉の高温熱処理に繰り返し使用して
も、その劣化が小さく、従って高寿命の鉄粉熱処理用容
器を提案するものである。Another object of the present invention is to propose a container for heat treatment of iron powder that exhibits little deterioration even when used repeatedly for high-temperature heat treatment of iron powder, and therefore has a long lifespan.
く！ｌＢを解決するための手段〉
本発明は主に鉄粉等を熱処理する際に用いられる容器で
、鉄粉に接する内表面にまずＣａｂ、 ／Ｖｔ０３＋Ｍ
ｇＯ等を主成分とする高融点の酸化物粉からなる塗布層
を形成し、次いでその上に黒鉛の塗布層を形成した熱処
理用容器である。Ku! Means for solving lB〉 The present invention is a container mainly used when heat treating iron powder, etc., and the inner surface in contact with the iron powder is first coated with Cab, /Vt03+M
This is a heat treatment container in which a coating layer made of a high melting point oxide powder containing gO or the like as a main component is formed, and then a graphite coating layer is formed thereon.
〈作 用〉
本発明者は、鉄粉と熱処理容器との焼結密着を防止する
ために種り検討した結果、容器内面にＣａｂ、 Ｎｘ（
：ｈ＊ ＭｇＱ等を主成分とする高融点酸化物粉を塗布
すると効果があることを発見した。<Function> As a result of various studies to prevent sintering and adhesion between the iron powder and the heat treatment container, the present inventor found that Cab, Nx (
:h* It has been discovered that applying a high melting point oxide powder containing MgQ etc. as a main component is effective.
しかしこの場合高融点酸化物粉が鉄粉焼結体表面に付着
して、粉砕後に製品中に混入して不純物として含まれ、
製品の特性を悪化させる原因となった。However, in this case, the high melting point oxide powder adheres to the surface of the iron powder sintered body, mixes into the product after crushing, and is included as an impurity.
This caused deterioration of product characteristics.
そこで、本発明者がさらに検討した結果、まず高融点酸
化物粉を塗布・乾燥後、黒鉛をさらに塗布して２層にす
ることにより、この上から鉄粉を充填して、熱処理して
も、容易に容器を反転させることにより、焼結体を排出
できることを発見した。Therefore, as a result of further study by the present inventor, it was found that after first coating and drying high melting point oxide powder, graphite was further coated to form a two-layer layer, then iron powder was filled on top of this and heat treatment was performed. discovered that the sintered body could be discharged by easily inverting the container.
また万一高融点酸化物が焼結体に付着しても、高融点酸
化物が黒鉛の上に乗っているため、容易にエアで吹き飛
ばせることが判った。このことはどのような高融点酸化
物を用いても製品品質には影響を与えないことを意味し
ている。It was also found that even if the high melting point oxide were to adhere to the sintered body, it could be easily blown away with air because the high melting point oxide was on top of the graphite. This means that no matter what kind of high melting point oxide is used, product quality will not be affected.
また黒鉛に起因するカーボンの熱処理容器への浸炭が軽
減されるので、容器寿命を数倍のばすことができた。Furthermore, since carburization of carbon caused by graphite into the heat treatment container was reduced, the life of the container could be extended several times.
なお、高融点酸化物粉とは、鉄粉の熱処理温度によって
、軟化あるいは溶解しない物質であれば特に限定されな
いが、Ｃａｂ、 １１ｇｏ＋ Ａｊ、ｏ、、 Ｃｒ１０
３等を主成分とする高融点酸化物粉がコストの点から好
ましい。Note that the high melting point oxide powder is not particularly limited as long as it is a substance that does not soften or dissolve depending on the heat treatment temperature of the iron powder, but includes Cab, 11go+ Aj, o, Cr10
A high melting point oxide powder containing 3 or the like as a main component is preferable from the viewpoint of cost.
第１図は本発明の熱処理容器の一実施例の平面図、第２
図はその側面の部分を示す拡大断面図、第３図は第２図
のさらに部分拡大断面図である。FIG. 1 is a plan view of one embodiment of the heat treatment container of the present invention, and FIG.
The figure is an enlarged sectional view showing a side part thereof, and FIG. 3 is a further partially enlarged sectional view of FIG. 2.
熱処理容器１は熱処理後の焼結金属粉末を粉砕しやすい
よう小塊とするため仕切壁２が設けられている。３は充
填金属粉末を示している。この容器内に粉末を充填する
前に第３図に示すように容器内表面に高融点酸化物わ）
４を塗布し乾燥後、ついで黒鉛粉５を塗布乾燥する０次
に鉄粉３を充填し熱処理炉に装入される。The heat treatment container 1 is provided with a partition wall 2 in order to easily crush the sintered metal powder after heat treatment into small lumps. 3 indicates the filling metal powder. Before filling the powder into this container, high melting point oxides are deposited on the inner surface of the container as shown in Figure 3).
4 is coated and dried, then graphite powder 5 is coated and dried.Next, iron powder 3 is filled and charged into a heat treatment furnace.
次に本発明を具体例により、さらに詳細に説明する。Next, the present invention will be explained in more detail using specific examples.
まず平均粒度３−程度のＣａＯを２０％の水溶液にして
ノズルによりスプレー後、加熱乾燥する。塗布量は２〜
４ｇ／ｎ（であった、この後、平均粒度ＩＩ！ｍの水溶
性の黒鉛を１５％濃度水溶液にてノズルによりスプレー
後乾燥した。黒鉛を均一に塗るためには、予め容器を予
熱しておくことが、たれ落ち等が生じないので好ましい
、黒鉛の塗布量は４〜８ｇ／イで十分である。この容器
に鉄粉を充填し熱処理炉に装入し熱処理を施し冷却後容
器を取出し、この容器を反転するだけで鉄粉の焼結体ブ
ロックは排出できた。First, a 20% aqueous solution of CaO having an average particle size of about 3-3 is sprayed through a nozzle, and then heated and dried. The amount of application is 2~
After this, water-soluble graphite with an average particle size of II!m was sprayed with a nozzle at a 15% concentration aqueous solution and dried. In order to apply graphite uniformly, preheat the container in advance. It is preferable to leave the container in place to prevent dripping, etc., and a coating amount of graphite of 4 to 8 g/i is sufficient.The container is filled with iron powder, charged into a heat treatment furnace, heat treated, and after cooling, the container is taken out. , the sintered block of iron powder could be discharged simply by inverting the container.
反転排出された焼結体ブロックの表面に付着しているＣ
ａＯ１黒鉛粉はエアブロ−によって、はぼ完全に除去さ
れ、特にＣａＯ粉の混入はなく製造した鉄粉特性に何ら
問題が生じなかった。C attached to the surface of the sintered block that has been reversed and discharged
The aO1 graphite powder was almost completely removed by air blowing, and no CaO powder was mixed in, causing no problems with the properties of the produced iron powder.
また黒鉛のみを塗布した場合にくらべて、熱処理容器の
寿命は３倍のびた。Additionally, the life of the heat treatment container was three times longer than when only graphite was applied.
〈発明の効果〉
以上、説明したように本発明の容器を用いることによっ
て金属粉末焼結体の排出は容易となり、従来の人手によ
る排出作業が不要となった。また従来の黒鉛のみを塗布
することによる容器の劣化が防止され容器の寿命も大幅
に向上させることができた。<Effects of the Invention> As described above, by using the container of the present invention, the metal powder sintered body can be easily discharged, and the conventional manual discharge operation is no longer necessary. Furthermore, the deterioration of the container caused by conventional coating of only graphite was prevented, and the life of the container was significantly extended.
第１図は本発明熱処理容器の平面図、第２図はその容器
内の鉄粉の充填状態を示す部分側面図、第３図は第２図
の要部拡大図である。
・・容器本体、
２・・・仕切壁、
３・・・鉄
粉、
４・・・高融点酸化物、
５・・・黒
鉛、
１ａ・・・容器鉄皮。FIG. 1 is a plan view of the heat treatment container of the present invention, FIG. 2 is a partial side view showing how the container is filled with iron powder, and FIG. 3 is an enlarged view of the main part of FIG. 2. ... Container body, 2... Partition wall, 3... Iron powder, 4... High melting point oxide, 5... Graphite, 1a... Container iron skin.
Claims (1)
の塗布層とさらにその上に黒鉛の塗布層を設けたことを
特徴とする鉄粉熱処理用容器。A container for heat treatment of iron powder, characterized in that a coating layer of a high melting point oxide is provided on the inner surface of the container in contact with iron powder, and a coating layer of graphite is further provided on the coating layer of a high melting point oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1017528A JPH02200701A (en) | 1989-01-30 | 1989-01-30 | Vessel for heat-treating iron powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1017528A JPH02200701A (en) | 1989-01-30 | 1989-01-30 | Vessel for heat-treating iron powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02200701A true JPH02200701A (en) | 1990-08-09 |
Family
ID=11946424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1017528A Pending JPH02200701A (en) | 1989-01-30 | 1989-01-30 | Vessel for heat-treating iron powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02200701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367347A (en) * | 2015-09-29 | 2018-08-03 | 霍加纳斯股份有限公司 | New iron-based composite powder |
-
1989
- 1989-01-30 JP JP1017528A patent/JPH02200701A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367347A (en) * | 2015-09-29 | 2018-08-03 | 霍加纳斯股份有限公司 | New iron-based composite powder |
| CN108367347B (en) * | 2015-09-29 | 2021-02-26 | 霍加纳斯股份有限公司 | Novel iron-based composite powder |
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