JPH01246301A - Belt furnace for heat-treating metal powder - Google Patents
Belt furnace for heat-treating metal powderInfo
- Publication number
- JPH01246301A JPH01246301A JP63071931A JP7193188A JPH01246301A JP H01246301 A JPH01246301 A JP H01246301A JP 63071931 A JP63071931 A JP 63071931A JP 7193188 A JP7193188 A JP 7193188A JP H01246301 A JPH01246301 A JP H01246301A
- Authority
- JP
- Japan
- Prior art keywords
- layer thickness
- powder
- furnace
- heat treatment
- belt
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Tunnel Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は金属粉末熱処理用ベルト炉に係わり、特に粉体
を特殊雰囲気においてスチールベルト上に積載して熱処
理する際に積載物の層厚を所定の厚みに制御できるベル
ト式熱処理炉に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a belt furnace for heat treatment of metal powder, and in particular to a method for reducing the layer thickness of the loaded material when the powder is loaded on a steel belt and heat treated in a special atmosphere. This invention relates to a belt-type heat treatment furnace that can control the thickness to a predetermined thickness.
〈従来の技術〉
−ｇに粉末冶金部門で使用される金属粉末はスチールベ
ルト炉の特殊雰囲気中で、脱酸、脱炭および脱窒等の熱
処理が行われる。第３図は従来の熱処理炉であるが、エ
ンドレスのスチールベルト４上に粉体は層状に積載され
入側出側はスポンジロール９でシールされている。この
従来のベルト炉１の積載物の層厚の制御方法は、入側粉
体供給装置２での層厚設定のみで行っているのが多く、
脱炭のための湿分投入、あるいは脱酸反応による水蒸気
発生等により粉体供給装置２の下端に粉体が耐着した場
合等、経時的に層厚が薄くなり、生産能率の低下、ある
いは品質のバラツキの原因となっていた。<Prior Art> Metal powders used in the powder metallurgy sector are subjected to heat treatments such as deoxidation, decarburization, and denitrification in a special atmosphere of a steel belt furnace. FIG. 3 shows a conventional heat treatment furnace, in which powder is stacked in layers on an endless steel belt 4, and the inlet and outlet sides are sealed with sponge rolls 9. This conventional method of controlling the layer thickness of the loaded material in the belt furnace 1 is often carried out only by setting the layer thickness in the inlet powder supply device 2.
If the powder adheres to the lower end of the powder supply device 2 due to the introduction of moisture for decarburization or the generation of steam due to deoxidation, the layer thickness will become thinner over time, resulting in a decrease in production efficiency or This caused variations in quality.
そこでこれらを解決する目的で出側の層厚を定期的に点
検測定し、供給装置の給粉下端の付着粉除去あるいは入
側層厚の設定アップを図っていた。Therefore, in order to solve these problems, the layer thickness on the outlet side was periodically inspected and measured, and the powder adhering to the lower end of the feeding device was removed or the layer thickness on the inlet side was set higher.
しかし、この方法は、常に一定した層厚が得られず、ま
た常時もしくは定期的に点検測定、調整する人が必要と
なり省力化の点でも問題があった。However, this method does not always provide a constant layer thickness, and requires a person to constantly or periodically inspect, measure, and adjust, which also poses a problem in terms of labor saving.
また、近年安全性の向上、原単位低減を目的に炉体の入
側、出側とも例えば実開昭６１−１６８１３３号。In addition, in recent years, for the purpose of improving safety and reducing unit consumption, the inlet and outlet sides of the furnace body have been developed, for example, in Japanese Utility Model Application No. 61-168133.
実開昭６０−１４３７３９号等にみられるように密閉化
する方向にあり従来のような層厚測定点検が困難になっ
て来ている。As seen in Japanese Utility Model Application No. 60-143739, etc., there is a trend toward sealing, and it is becoming difficult to perform layer thickness measurement and inspection as in the past.
〈発明が解決しようとする課題〉
本発明は上記従来技術の問題点を解決し、常に所定の一
定した積層厚が特に人手を介さずに得られる金属粉末熱
処理用ベルト炉を提案するものである。<Problems to be Solved by the Invention> The present invention solves the above-mentioned problems of the prior art and proposes a belt furnace for metal powder heat treatment in which a predetermined and constant layer thickness can always be obtained without special human intervention. .
〈課題を解決するための手段〉
本発明は金属粉末をスチールベルト上に積載して熱処理
する金属粉末熱処理用ベルト炉において、該熱処理炉入
側にスチールベルト上に粉体を任意の層厚に積載できる
粉体供給装置と、核熱処理炉出側に熱処理後の積載した
状態の層厚を連続的に測定できる層厚計を配置し、その
測定結果を該粉体供給装置にフィードバックし層厚を一
定に保つように制御する制御装置を備えたことを特徴と
する金属粉末熱処理用ベルト炉である。<Means for Solving the Problems> The present invention provides a belt furnace for metal powder heat treatment in which metal powder is loaded on a steel belt and heat-treated, and the powder is placed on the steel belt at an arbitrary layer thickness on the entrance side of the heat treatment furnace. A powder supply device that can be loaded and a layer thickness gauge that can continuously measure the layer thickness of the loaded powder after heat treatment are placed on the exit side of the nuclear heat treatment furnace, and the measurement results are fed back to the powder supply device to determine the layer thickness. This is a belt furnace for metal powder heat treatment, characterized in that it is equipped with a control device that controls the temperature to maintain a constant value.
〈作 用〉
本発明は特殊雰囲気にて金属粉末を連続あるいは間欠的
に熱処理するスチールベルト炉であるが、積層厚制御装
置の要点は次の通りである。<Function> The present invention is a steel belt furnace that heat-treats metal powder continuously or intermittently in a special atmosphere, and the main points of the lamination thickness control device are as follows.
（１） ベルト炉入側の粉体供給装置は遠隔にて層厚
を任意に調整できる構造であること、（２） ベルト
炉出側に連続的に層厚を検出する層厚計を配置すること
、
（３） 上記層厚計の検出する層厚と品質上で設定さ
れる層厚とを比較し前記粉体供給装置の層厚を補正する
制御装置を有していること。(1) The powder supply device on the entrance side of the belt furnace should have a structure that allows the layer thickness to be adjusted remotely. (2) A layer thickness gauge that continuously detects the layer thickness should be placed on the exit side of the belt furnace. (3) It has a control device that compares the layer thickness detected by the layer thickness meter with the layer thickness set for quality and corrects the layer thickness of the powder supply device.
以上３点を組合せ連続的に常時安定した層厚を得ること
ができる。By combining the above three points, it is possible to continuously obtain a stable layer thickness at all times.
〈実施例〉 次にさらに本発明の詳細を第１図に基づいて説明する。<Example> Next, the details of the present invention will be further explained based on FIG.
全密閉スチールベルト式熱処理炉１に連通した入側給粉
装置２は水封シール３により特殊雰囲気をシールしベル
ト４上に積載する粉末５の層厚を任意に遠隔信号で可変
できる、例えばシリンダー等により昇降する駆動部６を
持ち、同じくスチールベルト式熱処理炉１に連通した出
側には層厚計７を配置し、連続的に層厚を計り、この層
厚と設定値とを比較演算し、入側粉体供給装置２の駆動
部６に層厚変更信号を出す層厚制御Ｂ装置８より構成さ
れる。ここで熱処理炉出側の層厚計７としてはマイクロ
波距離計等が有利に利用できる。The inlet powder feeding device 2, which is connected to the completely hermetically sealed steel belt heat treatment furnace 1, seals a special atmosphere with a water seal 3, and the layer thickness of the powder 5 loaded on the belt 4 can be arbitrarily varied by a remote signal. It has a drive unit 6 that moves up and down by means of, etc., and a layer thickness gauge 7 is placed on the outlet side that also communicates with the steel belt heat treatment furnace 1, and the layer thickness is continuously measured, and this layer thickness and a set value are compared and calculated. It also includes a layer thickness control device B 8 that outputs a layer thickness change signal to the drive section 6 of the inlet powder supply device 2. Here, a microwave distance meter or the like can be advantageously used as the layer thickness meter 7 on the exit side of the heat treatment furnace.
次に操業結果を示す。Next, the operational results are shown.
海綿鉄を原料として■２ガスにて還元し粉末冶金用還元
鉄粉を製造した。製造装置として第１図の本発明の実施
例と、第３図の従来例を用いた。また各々の操業条件お
よび原料はほぼ同等のものを使用した。第２図に時間経
過に対するケーキ層厚の変化を対比して模式的に示す。Sponge iron was used as a raw material and reduced with 2 gases to produce reduced iron powder for powder metallurgy. As manufacturing apparatuses, an embodiment of the present invention shown in FIG. 1 and a conventional example shown in FIG. 3 were used. In addition, almost the same operating conditions and raw materials were used for each. FIG. 2 schematically shows the change in cake layer thickness over time.
第２図において、従来例では定期的に出側で層厚を測定
しその都度調整しているので層厚みが階段状となってい
る。一方、本発明では出側で層厚を連続的に測定し、連
続的に供給装置が制御されるので、安定した層厚みが維
持されている。In FIG. 2, in the conventional example, the layer thickness is periodically measured on the exit side and adjusted each time, so the layer thickness has a step-like shape. On the other hand, in the present invention, the layer thickness is continuously measured on the exit side and the supply device is continuously controlled, so that a stable layer thickness is maintained.
この結果、第１表に示すように本発明の方が生産性は向
上し、かつバラツキが小さい安定した品質の鉄粉が得ら
れる。As a result, as shown in Table 1, the productivity is improved in the present invention, and iron powder of stable quality with little variation can be obtained.
第 １ 表
〈発明の効果〉
本発明の装置により、常時所定の層厚で熱処理が可能に
なり、品質の安定化、所望の生産性の確保が図れる。ま
た、自動運転による省力化が達成されると共にケーキ先
端または出路りの検知器としても使用でき、炉に直結す
る前後設備の効率的な自動運転も可能にする。Table 1 <Effects of the Invention> The apparatus of the present invention makes it possible to perform heat treatment with a predetermined layer thickness at all times, thereby stabilizing quality and ensuring desired productivity. In addition, automatic operation saves labor and can also be used as a cake tip or exit path detector, allowing efficient automatic operation of front and rear equipment directly connected to the furnace.
第１図は本発明の概略図、第２図は本発明と従来との操
業中のケーキ層厚変化を示す図、第３図は従来例の概略
図である。
１・・・スチールベルト式熱処理炉、
２・・・入側粉体供給装置、 ３・・・水封シール、４
・・・ベルト、 ５・・・粉 末、６・・・
駆動部、 ７・・・層厚計、８・・・層厚制
御装置、 ９・・・スポンジロール。
特許出願人 川崎製鉄株式会社FIG. 1 is a schematic diagram of the present invention, FIG. 2 is a diagram showing changes in cake layer thickness during operation between the present invention and the conventional method, and FIG. 3 is a schematic diagram of the conventional example. 1...Steel belt type heat treatment furnace, 2...Inlet powder supply device, 3...Water seal, 4
...Belt, 5...Powder, 6...
Drive unit, 7... Layer thickness meter, 8... Layer thickness control device, 9... Sponge roll. Patent applicant: Kawasaki Steel Corporation
Claims (1)
粉末熱処理用ベルト炉において、該熱処理炉入側にスチ
ールベルト上に粉体を任意の層厚に積載できる粉体供給
装置と、該熱処理炉出側に熱処理後の積載した状態の層
厚を連続的に測定できる層厚計を配置し、その測定結果
を該粉体供給装置にフィードバックし層厚を一定に保つ
ように制御する制御装置を備えたことを特徴とする金属
粉末熱処理用ベルト炉。A belt furnace for metal powder heat treatment in which metal powder is loaded on a steel belt and heat treated includes a powder supply device that can load the powder to an arbitrary layer thickness on the steel belt on the entrance side of the heat treatment furnace, and A layer thickness gauge that can continuously measure the layer thickness of the loaded layer after heat treatment is placed on the side, and a control device is provided that feeds back the measurement results to the powder supply device and controls the layer thickness to be kept constant. A belt furnace for metal powder heat treatment characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071931A JPH01246301A (en) | 1988-03-28 | 1988-03-28 | Belt furnace for heat-treating metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071931A JPH01246301A (en) | 1988-03-28 | 1988-03-28 | Belt furnace for heat-treating metal powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01246301A true JPH01246301A (en) | 1989-10-02 |
Family
ID=13474755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63071931A Pending JPH01246301A (en) | 1988-03-28 | 1988-03-28 | Belt furnace for heat-treating metal powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01246301A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971496A (en) * | 2017-12-27 | 2018-05-01 | 鞍钢重型机械有限责任公司 | A kind of uniform distribution device that can accurately adjust powder thickness |
-
1988
- 1988-03-28 JP JP63071931A patent/JPH01246301A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971496A (en) * | 2017-12-27 | 2018-05-01 | 鞍钢重型机械有限责任公司 | A kind of uniform distribution device that can accurately adjust powder thickness |
| CN107971496B (en) * | 2017-12-27 | 2023-06-16 | 鞍钢重型机械有限责任公司 | Uniform distribution device capable of accurately adjusting powder thickness |
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