JPS61159132A - Inspection of quantity of inclusion in molten metal - Google Patents

Inspection of quantity of inclusion in molten metal

Info

Publication number
JPS61159132A
JPS61159132A JP59278169A JP27816984A JPS61159132A JP S61159132 A JPS61159132 A JP S61159132A JP 59278169 A JP59278169 A JP 59278169A JP 27816984 A JP27816984 A JP 27816984A JP S61159132 A JPS61159132 A JP S61159132A
Authority
JP
Japan
Prior art keywords
molten metal
suction
cylinder
vacuum
amount
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
Application number
JP59278169A
Other languages
Japanese (ja)
Inventor
Masahiro Yoshida
政博 吉田
Koji Nagae
光司 長江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Light Metal Industries Ltd
Original Assignee
Sumitomo Light Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Light Metal Industries Ltd filed Critical Sumitomo Light Metal Industries Ltd
Priority to JP59278169A priority Critical patent/JPS61159132A/en
Publication of JPS61159132A publication Critical patent/JPS61159132A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20Metals
    • G01N33/205Metals in liquid state, e.g. molten metals

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)

Abstract

PURPOSE:To evaluate the quantity of inclusion in a molten metal by operating a selector valve to suck the molten metal into a suction cylinder floated on the surface of the molten metal by a float and determining the depth and time of sinking of the device in this stage. CONSTITUTION:The suction cylinder 4 in which the molten metal 8 is sucked and contained is provided to the refractory float 6 floated on the surface of the molten metal 8 to be inspected and a molten metal introducing pipe 10 attached with a filter 12 is provided to the top end which extends downward from the lower part of said cylinder and is inserted into the molten metal 8. A vacuum buffer tank 2 which can maintain the prescribed degree of vacuum is provided to the upper part of the cylinder 4 and is communicated with the cylinder 4 via the selector valve 24. The molten metal suction device made into such constitution is floated on the surface of the molten metal 8 to be inspected. The valve 24 is operated to communicate the tank 2 with the cylinder 4. The molten metal 8 is sucked into the cylinder 4 through an introducing pipe 10 by the vacuum suction effect of the tank 2. The depth at which the molten metal suction device sinks into the molten metal 8 and the time when said device sinks therein are determined. The quantity of the inclusion in the molten metal 8 is evaluated from the measured values.

Description

【発明の詳細な説明】 (技術分野) 本発明は、溶融金属、特にアルミニウム溶湯中の介在物
量を検査する方法に係り、中でもかかる介在物量を迅速
にして、簡便に検査し得る方法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for inspecting the amount of inclusions in molten metal, particularly molten aluminum, and particularly to a method that can quickly and easily inspect the amount of inclusions. be.

(従来技術) 一般に、地金、スクラップ等の金属原料を溶解して得ら
れる鋳造前の溶融金属(溶湯)には、各種の介在物が含
まれており、このため鋳造物、更にはそれから圧延、鍛
造、押出等の加工によって製作される製品の品質を低下
せしめないように、かかる金属溶湯から介在物を除いて
やる必要がある。このような介在物としては、例えばア
ルミニウム溶湯にあっては、アルミニウム、マグネシウ
ム等の酸化物、耐火質物質粒子等の懸濁非金属粒子等が
あって、それらの介在物を可及的に除去することが、鋳
造溶湯処理工程の最重点管理項目とされている。
(Prior art) In general, molten metal (molten metal) before casting, which is obtained by melting metal raw materials such as ingots and scrap, contains various inclusions. It is necessary to remove inclusions from such molten metal so as not to degrade the quality of products manufactured by processing such as , forging, extrusion, etc. Examples of such inclusions include oxides of aluminum and magnesium, suspended non-metallic particles such as refractory particles, etc. in molten aluminum, and these inclusions should be removed as much as possible. This is considered the most important control item in the casting molten metal processing process.

しかして、そのような金属溶湯中の介在物は、通常数μ
〜数十μの範囲にあるものが多く、またその量も少ない
ところから、かかる介在物の補集や、その存在量の定量
的な把握には、−甚だ困難な問題が内在している。
However, such inclusions in molten metal usually have a size of several μm.
Since many of the inclusions are in the range of ~ several tens of microns, and the amount thereof is small, there are inherent problems in collecting such inclusions and quantitatively understanding their abundance.

従来、かかる金属溶湯中の介在物量を知るための検査法
としては、例えば標準フィルタを用いて溶湯を吸引乃至
は加圧して、フィルタ上に介在物を濃縮し、そのフィル
タ断面を観察したり、或いはフィルタの目詰り程度を、
吸引圧力損失、吸引溶湯重量の変化としてとらえる方法
があり、また特公昭59−288325号公報には、吸
引溶湯重量を検知する方式に従って、吸引筒に対して所
定の真空ポンプを接続する一方、適当なフィルタ部材を
設けた吸引パイプを通じて、金属溶湯を該吸引筒内に吸
引、保持せしめて、かかる吸引筒内の溶湯の重量検知を
行う方法が検討されている。
Conventionally, testing methods for determining the amount of inclusions in molten metal include, for example, sucking or pressurizing the molten metal using a standard filter, concentrating the inclusions on the filter, and observing the cross section of the filter. Or check the degree of clogging of the filter.
There is a method of detecting the suction pressure loss as a change in the weight of the suction molten metal, and in Japanese Patent Publication No. 59-288325, according to the method of detecting the weight of the suction molten metal, a predetermined vacuum pump is connected to the suction cylinder, and an appropriate A method of detecting the weight of the molten metal in the suction cylinder by suctioning and holding the molten metal into the suction cylinder through a suction pipe provided with a filter member has been studied.

(問題点) しかしながら、かかる特公昭59−28832号で示さ
れる方法は、比較的、定量的な介在物量の把握が可能で
ある利点を有するとはいえ、装置がかなり大きくなり、
その操作性、介在物量の迅速な評価の点において難点が
あり、また真空ポンプ計、重量検知デバイスがセットさ
れており、そのハンドリングに制約がある問題がある他
、吸引筒に対して真空ポンプを直結して使用するもので
あるところから、測定の毎に該吸引筒内の真空度のばら
つきが生じ易い問題を内在している。
(Problem) However, although the method disclosed in Japanese Patent Publication No. 59-28832 has the advantage of being able to relatively quantitatively determine the amount of inclusions, it requires a fairly large device;
There are some drawbacks in terms of operability and quick evaluation of the amount of inclusions.In addition, there are problems with the handling of the vacuum pump gauge and weight detection device, which are limited in their handling. Since it is used in a direct connection, there is a problem in that the degree of vacuum within the suction cylinder tends to vary with each measurement.

(解決手段) ここにおいて、本発明は、かかる問題を解決するために
為されたものであって、その特徴とするところは、検査
すべき溶融金属の表面に浮かべられる耐火性のフロート
に、該溶融金属が吸引、収容される吸引筒を設ける一方
、該吸引筒の下部から下方に延び且つ該溶融金属中に挿
入せしめられる、先端部に所定のフィルタを取り付けた
溶湯導入パイプを設けると共に、該吸引筒の上部に所定
の真空度に保持し得る真空バッファタンクを設けて、該
バッファタンクと該吸引筒とを、切換弁を介して連通せ
しめてなる溶湯吸引装置を用いて、かかる溶湯吸引装置
を前記検査すべき溶融金属表面に浮かべ、そして前記切
換弁による切換作動によって前記バッファタンクと前記
吸引筒とを連通せしめることにより、該バッファタンク
の真空吸引作用にて前記溶湯導入パイプを通じて該吸引
筒内に溶融金属を吸引せしめて、該溶湯吸引装置の溶融
金属に対する沈み込み量及び沈み込み時間を求め、この
得られた沈み込み量と沈み込み時間から該溶融金属の介
在物量を評価するようにしたのである。
(Solution Means) Here, the present invention was made to solve this problem, and its feature is that a refractory float floating on the surface of the molten metal to be inspected is A suction cylinder for sucking and storing molten metal is provided, and a molten metal introduction pipe extending downward from the lower part of the suction cylinder and inserted into the molten metal is provided, and a predetermined filter is attached to the tip of the molten metal introduction pipe. A molten metal suction device is manufactured by using a molten metal suction device in which a vacuum buffer tank that can maintain a predetermined degree of vacuum is provided on the top of a suction tube, and the buffer tank and the suction tube are communicated via a switching valve. is floated on the surface of the molten metal to be inspected, and the buffer tank and the suction cylinder are brought into communication by the switching operation of the switching valve. The molten metal is sucked into the molten metal, the amount of sinking of the molten metal suction device into the molten metal and the sinking time are determined, and the amount of inclusions in the molten metal is evaluated from the obtained sinking amount and sinking time. That's what I did.

(発明の効果) このような本発明手法によれば、耐火性のフロートによ
って所定の吸引筒を溶湯表面に浮かべ、そして切換弁の
操作によって、かかる吸引筒内に溶湯を吸引せしめ、そ
の際の装置の沈み込み量及びその沈み込み時間を求めて
、かかる溶湯中の金属介在物量を評価することとなると
ころから、本発明に従う溶湯吸引装置を浮かべるスペー
スがあれば、その設置場所を特に選ばず使用し得る利点
があり、そしてまたその場で完全に介在物量の多少を評
価することができ、更には真空ポンプ系とは分離して使
用することができ、しかも小型でコンパクトな装置を用
いることが可能となるのである。
(Effects of the Invention) According to the method of the present invention, a predetermined suction tube is floated on the surface of the molten metal using a fire-resistant float, and the molten metal is sucked into the suction tube by operating the switching valve. Since the amount of sinking of the device and its sinking time are determined to evaluate the amount of metal inclusions in the molten metal, the molten metal suction device according to the present invention can be installed anywhere as long as there is space to float it. It has the advantage of being able to be used, and also being able to completely evaluate the amount of inclusions on the spot, and being able to be used separately from the vacuum pump system, and using a small and compact device. becomes possible.

そして、真空バッファタンクにより吸引圧を得るもので
あるところから、初期圧力の設定の再現性が良く、常に
一定した吸引力が得られ、また容器内の真空度のばらつ
きが少ない等の優れた効果を発揮し得るのである。
Since the suction pressure is obtained using a vacuum buffer tank, the initial pressure setting is highly reproducible, a constant suction force is always obtained, and there is little variation in the degree of vacuum inside the container. It is possible to demonstrate this.

(構成の具体的な説明) 以下、本発明を、更に具体的に明らかにするために、図
面を参照しつつ、本発明の構成について詳細に説明する
こととする。
(Specific Description of Configuration) Hereinafter, in order to clarify the present invention more specifically, the configuration of the present invention will be described in detail with reference to the drawings.

先ず、第1図は、本発明において好適に用いられる溶湯
吸引装置を示しており、そこにおいて、かかる溶湯吸引
装置は上部の真空バッファタンク2と下部の吸引筒4の
2室からなり、また下部の吸引筒4は軽量石綿等からな
る耐火、断熱性のフロート6内に収容されて、検査すべ
き所定の金属溶湯8、例えばA1若しくはその合金溶湯
等の表面に浮かべられ得るようになっている。そして、
吸引筒4の底部からフロー)・6を貫通して、下方に延
びる、金属溶湯8中に挿入せしめられる溶湯導入パイプ
10が設けられており、この溶湯導入パイプIOの先端
部に、ポーラス黒鉛或いはセラミックス等からなるフィ
ルタ12を有するフィルタホルダ14が装着されている
。なお、かかる真空バッファタンク2や吸引筒4を構成
する容器としては、黒鉛或いはステンレス等の金属材料
からなる容器が用いられ得るが、吸引筒4を金属製とす
る場合にあっては、適当な耐火断熱材16をその内面に
内張すすることが望ましい。
First, FIG. 1 shows a molten metal suction device suitably used in the present invention, in which the molten metal suction device consists of two chambers: an upper vacuum buffer tank 2 and a lower suction cylinder 4. The suction cylinder 4 is housed in a fireproof and heat-insulating float 6 made of lightweight asbestos or the like, so that it can be floated on the surface of a predetermined molten metal 8 to be inspected, such as A1 or its alloy molten metal. . and,
A molten metal introduction pipe 10 is provided that extends downward from the bottom of the suction tube 4 through the flow) 6 and is inserted into the molten metal 8. At the tip of this molten metal introduction pipe IO, porous graphite or A filter holder 14 having a filter 12 made of ceramics or the like is attached. Note that containers made of metal materials such as graphite or stainless steel may be used as the containers constituting the vacuum buffer tank 2 and the suction tube 4, but if the suction tube 4 is made of metal, an appropriate container may be used. It is desirable to line the inner surface with a refractory heat insulating material 16.

一方、上部の真空バッファタンク2は、接続パイプ18
を介して真空ポンプ等の真空系に脱着可能に接続され得
るようになっており、バルブ20の開閉によって、かか
る真空バッファタンク2の内部が所定の真空度に保持さ
れ得るようになっている。なお、バッファタンク2内の
真空度は真空圧力計22によって検出されることとなる
。また、この真空バッファタンク2の底部には、切換弁
24が設けられており、その弁体がロッド昇降装置(ソ
レノイド等)26にて昇降せしめられるロッド28にて
作動せしめられ、かかる真空バッファタンク2内と下部
の吸引筒4内とを連通し或いは遮断し得るようになって
いる。なお、真空パフファタンク2の下面には、通気性
を有する耐火断熱材からなる断熱層30が形成されてお
り、この断熱層の前記切換弁24の開口部を覆う部分に
少なくとも位置するように、金属メツシュ32が位置せ
しめられている。この金属メツシュ32は、吸引筒4内
に吸引された金属溶湯8が真空バッファタンク2の真空
吸引作用によって切換弁24を通じて該真空バッファタ
ンク2内に侵入するのを阻止するためのものである。
On the other hand, the upper vacuum buffer tank 2 is connected to the connecting pipe 18.
The vacuum buffer tank 2 can be detachably connected to a vacuum system such as a vacuum pump through the vacuum buffer tank 2, and the interior of the vacuum buffer tank 2 can be maintained at a predetermined degree of vacuum by opening and closing the valve 20. Note that the degree of vacuum within the buffer tank 2 is detected by a vacuum pressure gauge 22. Further, a switching valve 24 is provided at the bottom of the vacuum buffer tank 2, and its valve body is operated by a rod 28 that is raised and lowered by a rod lifting device (solenoid, etc.) 2 and the inside of the lower suction cylinder 4 can be communicated or disconnected. A heat insulating layer 30 made of a breathable fireproof heat insulating material is formed on the lower surface of the vacuum puffer tank 2, and a metal layer 30 is formed on the bottom surface of the vacuum puffer tank 2 so as to be located at least in a portion of this heat insulating layer that covers the opening of the switching valve 24. A mesh 32 is positioned. This metal mesh 32 is for preventing the molten metal 8 drawn into the suction cylinder 4 from entering the vacuum buffer tank 2 through the switching valve 24 due to the vacuum suction action of the vacuum buffer tank 2.

このような構成の真空吸引装置を用いて、金属溶湯8中
の介在物量を検査するに際しては、先ず切換弁24をロ
ッド昇降装置26の作動によって閉じて、吸引筒4に対
する連通を遮断した後、バルブ18を開け、適当な真空
ポンプにて、接続パイプ18を通じて、真空バッファタ
ンク2内の圧力を所定圧カニP1に下げる。この時の圧
力は、圧力計22によって読み取られる。所定の圧カニ
P、になったら、バルブ20を閉じる。このような所定
の真空度に保持した状態において、溶湯吸引装置は自由
に移動でき、介在物量を測定したい場所にセットされる
こととなる。
When inspecting the amount of inclusions in the molten metal 8 using a vacuum suction device with such a configuration, first close the switching valve 24 by operating the rod lifting device 26 to cut off communication with the suction cylinder 4, and then Open the valve 18 and lower the pressure inside the vacuum buffer tank 2 to a predetermined pressure P1 through the connecting pipe 18 using a suitable vacuum pump. The pressure at this time is read by the pressure gauge 22. When the predetermined pressure P is reached, the valve 20 is closed. While maintaining the predetermined degree of vacuum, the molten metal suction device can be moved freely and set at a location where the amount of inclusions is to be measured.

そして、目的とする測定場所において、溶湯吸引装置の
溶湯導入パイプ10を金属溶湯8中に挿入し、その先端
部のフィルタホルダ14を溶湯8内に浸漬せしめ、充分
に予熱する。この時、吸引筒4内の圧カニP2は、内部
空気の熱膨張により高くなるが、フィルタ12を通じて
その膨張分は排出され、大気圧:Poと略等しい圧力と
なる。
Then, at the intended measurement location, the molten metal introduction pipe 10 of the molten metal suction device is inserted into the molten metal 8, and the filter holder 14 at the tip thereof is immersed in the molten metal 8 to be sufficiently preheated. At this time, the pressure P2 in the suction cylinder 4 increases due to thermal expansion of the internal air, but the expansion is exhausted through the filter 12, and the pressure becomes approximately equal to atmospheric pressure: Po.

そして、このような状態でロッド昇降装置26を作動さ
せ、切換弁24を開いて、真空パフファタンク2と吸引
筒4とを連通せしめると、それら容器内の圧カニPは次
式のようになるのである。
Then, in this state, when the rod lifting device 26 is operated and the switching valve 24 is opened to connect the vacuum puffer tank 2 and the suction cylinder 4, the pressure crab P in these containers becomes as shown in the following equation. be.

V++Vt          α+1但し、 α”V+ /Vz  ;  タンク容積比β=Pl/P
t ; 圧力比 なお、かかる吸引圧:Pはフィルタ12の種類によって
異なった値が採用されるものである。また、αは装置の
大きさに関係するが、一般に、1〜3が好ましく、一方
βは使用するフィルタ12の通気度に関係する。更に、
P、をI Torr以下にすると、β−1/760<<
1より、P−P、/(α+1)と近似することもできる
V++Vt α+1 However, α”V+ /Vz; Tank volume ratio β=Pl/P
t; Pressure ratio Note that the suction pressure: P has different values depending on the type of filter 12. Further, α is related to the size of the device, but is generally preferably 1 to 3, while β is related to the air permeability of the filter 12 used. Furthermore,
When P is less than I Torr, β-1/760<<
1, it can also be approximated as PP,/(α+1).

ところで、かかる切換弁24の作動による上下二つの室
の連通によって、金属溶湯8の吸引動作を開始すると、
フィルタ12を通じて、溶湯8が吸引筒4内に入り、該
金属溶湯8中の介在物は、かかるフィルタ12にて捕捉
されることとなる。
By the way, when the suction operation of the molten metal 8 is started by communicating the two upper and lower chambers by operating the switching valve 24,
The molten metal 8 enters the suction cylinder 4 through the filter 12, and inclusions in the molten metal 8 are captured by the filter 12.

そして、吸引筒4の溶湯量が増加するに従い、溶湯吸引
装置はその装置全体が溶湯8中に、漸次沈み込むように
なる。すなわち、第2図(a)に示される状態から、吸
引筒4内への溶湯8の吸い上げによって、第2図(b)
に示されるように、高さ:1だけ沈み込むこととなる。
As the amount of molten metal in the suction cylinder 4 increases, the entire molten metal suction device gradually sinks into the molten metal 8. That is, by sucking up the molten metal 8 from the state shown in FIG. 2(a) into the suction cylinder 4, the state shown in FIG. 2(b) is achieved.
As shown in , it will sink by a height of 1.

この際、金属溶湯8中の介在物量が少ない場合には、フ
ィルタ12に捕捉される介在物量が少なく、それ故該フ
ィルタ12を通過する溶湯8Nが抑制されず、吸引筒4
内に吸い上げられる金属溶湯量が多くなるために、装置
は短時間に沈降するが、金属溶湯8中の介在物量が多い
場合にあっては、かかる介在物量がフィルタ12に捕捉
されて、該フィルタ12を通じて吸引筒4内に吸引され
る溶湯量を低下せしめるために、沈降速度が遅く、甚だ
しい場合には目詰りによって、その沈降が停止する場合
も生じるのである。
At this time, when the amount of inclusions in the molten metal 8 is small, the amount of inclusions captured by the filter 12 is small, so the molten metal 8N passing through the filter 12 is not suppressed, and the suction tube 4
Since the amount of molten metal sucked up into the molten metal 8 increases, the device settles in a short time. However, if there is a large amount of inclusions in the molten metal 8, the amount of inclusions is captured by the filter 12, and the filter 12 In order to reduce the amount of molten metal sucked into the suction cylinder 4 through the suction tube 12, the sedimentation speed is slow, and in severe cases, the sedimentation may stop due to clogging.

従って、金属溶湯8中の介在物量は、上述の溶湯吸引装
置の沈み込み挙動、換言すればかかる装置が一定の距離
:Itoまで沈み込むまでの時間:t、或いはかかる装
置の一定時間:t0の沈み込み量=1によって、評価す
ることができるのである。因みに、第3図(a)には、
一定の距離二l。
Therefore, the amount of inclusions in the molten metal 8 is determined by the sinking behavior of the molten metal suction device described above, in other words, the time it takes for this device to sink to a certain distance: Ito, or the certain time t0 of this device. It can be evaluated based on the sinking amount = 1. Incidentally, in Figure 3(a),
A certain distance 2l.

までの沈み込み時間tを求めて、溶湯8中の介在物量を
評価する例が示されており、また第3図(b)には、一
定時間:toにおける沈み込み量:lからの評価例が、
示されている。それらの例において、曲線Aから曲線C
になるに従って、溶湯8中の介在物量が多くなることと
なる。
An example is shown in which the amount of inclusions in the molten metal 8 is evaluated by determining the sinking time t until but,
It is shown. In those examples, curve A to curve C
As the temperature increases, the amount of inclusions in the molten metal 8 increases.

なお、このような溶湯吸引装置の沈み込み量:lは、適
当な公知の手段、例えばフロート6に目盛を付したり、
基準平面からの装置の沈み込み量を測定したりする等の
手段を採用することによって、容易に測定され得るもの
である。また、吸引筒4内に吸い上げられた金属溶湯8
は、バルブ20を開け、フィルタホルダ14を取り外す
ことにより排出されることとなる。特に、上例の如き構
造の溶湯吸引装置にあっては、吸引筒4周囲が耐火断熱
材からなるフロート6にて囲まれているところから、吸
引筒はかなり長時間にわたって溶湯状態に保持され、こ
れによって吸引筒の凝固に基    □づく問題も惹起
されることがないのである。なお、上例の装置にあって
は、従来法の如く、装置本体をフロート6から外し、吸
引筒の重量変化として介在物量を評価することも可能で
ある。
Incidentally, the amount of sinking (l) of such a molten metal suction device can be determined by appropriate known means, such as adding a scale to the float 6,
This can be easily measured by measuring the amount of depression of the device from the reference plane. Also, the molten metal 8 sucked up into the suction tube 4
will be discharged by opening the valve 20 and removing the filter holder 14. In particular, in the case of the molten metal suction device having the above structure, since the suction tube 4 is surrounded by the float 6 made of fireproof heat insulating material, the suction tube is kept in a molten metal state for a considerable period of time. This also prevents problems due to solidification of the suction tube. In the case of the above-mentioned apparatus, it is also possible to remove the apparatus main body from the float 6 and evaluate the amount of inclusions as a change in the weight of the suction cylinder, as in the conventional method.

このように、本発明に従えば、用いられる溶湯吸引装置
は、真空ポンプ系とは分離され、それ故取扱が簡単であ
ると共に、小型で、コンパクトなものであって、かかる
真空吸引装置を浮かべるスペースがあれば、場所を特に
選ぶことなく使用することができ、またその場で完全に
介在物量の多少を評価することができる他、真空バッフ
ァタンクにより吸引圧を得るものであるところから、初
期圧力の設定の再現性が良く、常に一定した吸引力が得
られ、従って従来法の如き容器内真空度のばらつきが少
ない等の優れた利点を有するものである。
Thus, according to the invention, the molten metal suction device used is separate from the vacuum pump system and is therefore easy to handle, small and compact, and such a vacuum suction device can be floated. If there is space, it can be used anywhere, and the amount of inclusions can be completely evaluated on the spot. This method has excellent advantages such as good reproducibility of pressure settings, constant suction force, and less variation in the degree of vacuum inside the container unlike conventional methods.

なお、本発明は、以上の具体的な例示のみに限定して解
釈されるものではなく、その趣旨を逸脱しない限りにお
いて、種々なる変形された態様で実施され得るものであ
り、本発明がそのような実施形態のものをも、その範晴
に含むものであること、言うまでもないところである。
It should be noted that the present invention is not to be construed as being limited to the above-mentioned specific examples, and may be implemented in various modified forms without departing from the spirit thereof. It goes without saying that such embodiments are also included in the scope.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明に好適に用いられる溶湯吸引装置の一
例を示す断面図であり、第2図(a)及゛び(b)は、
そのような溶湯吸引装置の沈み込み前の状態及び沈み込
み後の状態を、それぞれ示す説明図であり、第3図(a
)及び(b)は、それぞれ沈み込み時間と沈み込み量(
距離)の関係を示すグラフである。 2:真空バッファタンク 4:吸引筒      6:フロート 8:金属溶湯     10:溶湯導入パイプ12:フ
ィルタ    14:フィルタホルダ24:切換弁  
   26:ロツド昇降装置28:ロッド     3
0:断熱層 32:金属メツシュ 出願人 住友軽金属工業株式会社 第2図 (a)            (b)第3図 (a)           (b) 時間を−時開を−
FIG. 1 is a sectional view showing an example of a molten metal suction device suitably used in the present invention, and FIGS. 2(a) and (b) are
FIG.
) and (b) are the subduction time and subduction amount (
It is a graph showing the relationship between (distance). 2: Vacuum buffer tank 4: Suction cylinder 6: Float 8: Molten metal 10: Molten metal introduction pipe 12: Filter 14: Filter holder 24: Switching valve
26: Rod lifting device 28: Rod 3
0: Heat insulation layer 32: Metal mesh Applicant: Sumitomo Light Metal Industries, Ltd. Figure 2 (a) (b) Figure 3 (a) (b) Time

Claims (1)

【特許請求の範囲】[Claims] 検査すべき溶融金属の表面に浮かべられる耐火性のフロ
ートに、該溶融金属が吸引、収容される吸引筒を設ける
一方、該吸引筒の下部から下方に延び且つ該溶融金属中
に挿入せしめられる、先端部に所定のフィルタを取り付
けた溶湯導入パイプを設けると共に、該吸引筒の上部に
所定の真空度に保持し得る真空バッファタンクを設けて
、該バッファタンクと該吸引筒とを、切換弁を介して連
通せしめてなる溶湯吸引装置を用いて、かかる溶湯吸引
装置を前記検査すべき溶融金属表面に浮かべ、そして前
記切換弁による切換作動によって前記バッファタンクと
前記吸引筒とを連通せしめることにより、該バッファタ
ンクの真空吸引作用にて前記溶湯導入パイプを通じて該
吸引筒内に溶融金属を吸引せしめて、該溶融吸引装置の
溶融金属に対する沈み込み量及び沈み込み時間を求め、
この得られた沈み込み量と沈み込み時間から該溶融金属
の介在物量を評価することを特徴とする溶融金属中の介
在物量検査法。
A refractory float floating on the surface of the molten metal to be inspected is provided with a suction tube into which the molten metal is sucked and contained, and the suction tube extends downward from the bottom of the suction tube and is inserted into the molten metal. A molten metal introduction pipe with a predetermined filter attached to the tip is provided, and a vacuum buffer tank that can maintain a predetermined degree of vacuum is provided above the suction tube, and a switching valve is connected between the buffer tank and the suction tube. Floating the molten metal suction device on the surface of the molten metal to be inspected using a molten metal suction device communicated through the molten metal suction device, and communicating the buffer tank and the suction cylinder by switching operation of the switching valve, sucking the molten metal into the suction cylinder through the molten metal introduction pipe by the vacuum suction action of the buffer tank, and determining the sinking amount and sinking time of the melt suction device into the molten metal;
A method for inspecting the amount of inclusions in molten metal, which comprises evaluating the amount of inclusions in the molten metal from the obtained sinking amount and sinking time.
JP59278169A 1984-12-29 1984-12-29 Inspection of quantity of inclusion in molten metal Pending JPS61159132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59278169A JPS61159132A (en) 1984-12-29 1984-12-29 Inspection of quantity of inclusion in molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59278169A JPS61159132A (en) 1984-12-29 1984-12-29 Inspection of quantity of inclusion in molten metal

Publications (1)

Publication Number Publication Date
JPS61159132A true JPS61159132A (en) 1986-07-18

Family

ID=17593550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59278169A Pending JPS61159132A (en) 1984-12-29 1984-12-29 Inspection of quantity of inclusion in molten metal

Country Status (1)

Country Link
JP (1) JPS61159132A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04136567U (en) * 1991-06-07 1992-12-18 新日本製鐵株式会社 Probe for sampling molten iron containing carbon
US5827982A (en) * 1997-02-24 1998-10-27 Alcan International Limited Portable liquid metal filtration device for inclusion analysis
JPWO2006095653A1 (en) * 2005-03-08 2008-08-14 東邦チタニウム株式会社 Method and apparatus for extracting molten metal or molten metal chloride
EP2108953A1 (en) * 2008-04-09 2009-10-14 Foseco International Limited A tool for determining metal quality

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04136567U (en) * 1991-06-07 1992-12-18 新日本製鐵株式会社 Probe for sampling molten iron containing carbon
US5827982A (en) * 1997-02-24 1998-10-27 Alcan International Limited Portable liquid metal filtration device for inclusion analysis
JPWO2006095653A1 (en) * 2005-03-08 2008-08-14 東邦チタニウム株式会社 Method and apparatus for extracting molten metal or molten metal chloride
JP4731552B2 (en) * 2005-03-08 2011-07-27 東邦チタニウム株式会社 Method and apparatus for extracting molten metal or molten metal chloride
EP2108953A1 (en) * 2008-04-09 2009-10-14 Foseco International Limited A tool for determining metal quality
WO2009136136A2 (en) * 2008-04-09 2009-11-12 Foseco International Limited A tool for determining metal quality and a method for determining metal quality
WO2009136136A3 (en) * 2008-04-09 2010-03-04 Foseco International Limited A tool for determining metal quality

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