JPH0210868B2 - - Google Patents
Info
- Publication number
- JPH0210868B2 JPH0210868B2 JP7957285A JP7957285A JPH0210868B2 JP H0210868 B2 JPH0210868 B2 JP H0210868B2 JP 7957285 A JP7957285 A JP 7957285A JP 7957285 A JP7957285 A JP 7957285A JP H0210868 B2 JPH0210868 B2 JP H0210868B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- thermite
- layer
- tube
- reaction
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 63
- 239000002184 metal Substances 0.000 claims description 63
- 239000003832 thermite Substances 0.000 claims description 47
- 239000000919 ceramic Substances 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 239000002923 metal particle Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 39
- 229910000831 Steel Inorganic materials 0.000 description 27
- 239000010959 steel Substances 0.000 description 27
- 238000001816 cooling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Chemically Coating (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、テルミツト反応を利用して母管内面
にセラミツクス層を被覆形成する複合管の製造方
法の改良に係り、特に前記形成されるセラミツク
ス層に引張割れを生ぜしめない複合管の製造方法
に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an improvement in a method for manufacturing a composite tube in which a ceramic layer is formed on the inner surface of a main tube by using a thermite reaction, and in particular, the present invention relates to an improvement in a method for manufacturing a composite tube in which a ceramic layer is formed on the inner surface of a mother tube by using a thermite reaction. This invention relates to a method for manufacturing a composite pipe that does not cause tensile cracks in the layers.
（従来の技術）
母管内面にセラミツクス層を被覆形成せしめて
なる複合管は、セラミツクス層が耐熱性、耐摩耗
性、耐食性等に良好な特性を発揮するため、各種
流体の輸送管や工業用配管部材として広汎な適用
用途を有している。(Prior art) Composite pipes made by coating the inner surface of the mother pipe with a ceramic layer are suitable for use as transport pipes for various fluids and for industrial use because the ceramic layer exhibits good properties such as heat resistance, abrasion resistance, and corrosion resistance. It has a wide range of applications as a piping member.
この種複合管の製造手段としては、従来種々の
方法が実施されてきているが、最近ではその好適
な製造手段として、例えば特公昭57−40219号公
報、特公昭59−27747号公報等に記載の発明の如
く遠心力とテルミツト反応を利用するいわゆる遠
心テルミツト法が提起されている。すなわち、こ
の方法は第５図に示すように、母管１内に、例え
ばAlとFe2O3の如き金属還元剤と金属酸化物との
一定比率の混合物からなるテルミツト剤を装填し
テルミツト剤層２を形成し、これを高速回転によ
る遠心力場内で着火して、下記式に例示する如き
テルミツト反応を行わしめ、この発熱反応により
生成される溶融金属と溶融セラミツクスとを比重
分離して、第６図に示すように母管１の内面に金
属層３を介して所望のセラミツクス層４を被覆形
成するものである。 Various methods have been used to manufacture this type of composite pipe, but recently, suitable manufacturing methods have been described, for example, in Japanese Patent Publication No. 57-40219, Japanese Patent Publication No. 59-27747, etc. The so-called centrifugal thermite method, which utilizes centrifugal force and thermite reaction, has been proposed. That is, in this method, as shown in FIG. 5, a thermite agent consisting of a mixture of a metal reducing agent such as Al and Fe 2 O 3 and a metal oxide at a certain ratio is loaded into the main tube 1, and the thermite agent is Form a layer 2, ignite it in a centrifugal force field due to high speed rotation, perform a thermite reaction as exemplified by the following formula, and separate the molten metal and molten ceramic produced by this exothermic reaction by specific gravity, As shown in FIG. 6, the inner surface of the main tube 1 is coated with a desired ceramic layer 4 via a metal layer 3.
（発明が解決しようとする問題点）
上記テルミツト反応の一例を示すと下記の通
り；
Fe2O3＋2Al→Al2O3＋2Fe
＋199cal／Al2O3モル
この場合金属層は鉄、セラミツクス層はアルミ
ナになる。 ( Problems to be Solved by the Invention) An example of the thermite reaction described above is as follows ; Becomes alumina.
しかして、遠心テルミツト法で使用可能なテル
ミツト剤は、溶融生成物が十分分離できるに足る
発熱を伴うものでなければならないが、上式で示
す反応では、理論的には3000℃を越える高温状態
が得られる。この反応は、母管例えば長い鋼管内
で誘起すると、着火点が１箇所であつても反応が
急速に拡がり短時間に全域に及ぶ。このさい生起
した反応熱は前記外装鋼管を加熱することになる
が、使用するテルミツト剤の量によつては、1000
℃を越える温度に達する。このため外層鋼管は、
例えば管長において、温度上昇に見合う分（ΔL
＝α（T′−Ｔ）Ｌ、α：線膨張係数、Ｔ：反応後
の鋼管温度、T′：反応前の鋼管温度、Ｌ：管長）
が膨張し、その後の冷却過程では逆に収縮するこ
とになる。 Therefore, the thermite agent that can be used in the centrifugal thermite method must generate enough heat to separate the molten products, but in the reaction shown in the above equation, the temperature is theoretically higher than 3000°C. is obtained. When this reaction is induced in a main pipe, for example, a long steel pipe, even if the ignition point is at one location, the reaction rapidly spreads and reaches the entire area in a short period of time. The reaction heat generated at this time heats the exterior steel pipe, but depending on the amount of thermite agent used,
Reach temperatures exceeding ℃. For this reason, the outer layer steel pipe is
For example, in the pipe length, the amount corresponding to the temperature rise (ΔL
=α(T'-T)L, α: linear expansion coefficient, T: steel pipe temperature after reaction, T': steel pipe temperature before reaction, L: pipe length)
expands, and then conversely contracts during the cooling process.
一方、溶融生成物層はしばらく溶融状態にある
が、間もなく凝固し、その後は収縮の一途を辿
る。以上のように外層鋼管と生成物は異なつた熱
伸縮パターン（挙動）を呈し、膨張係数も異なる
ことから、常温までの冷却過程では両者の間に相
対的なズレが不可避的に起る。特に最内層のセラ
ミツクス層は鋼よりも高い融点を持つものが多
く、外装鋼管とセラミツクス層との間に生成され
る生成金属に先んじて凝固し、収縮を開始する。
直後生成金属が凝固し、セラミツクスを追いかけ
る形で収縮し、そのうち一体化し、以後セラミツ
クスを締めつける様な状態で常温に至るものと想
定される。しかし現実には母管である外装鋼管の
伸縮挙動がこれに加わるため、外装鋼管と生成金
属間の相対移動あるいはその時の界面力（相対す
べりを生ぜしめるに必要な力）も関係してくるこ
とになる。 On the other hand, the molten product layer remains in a molten state for a while, but soon solidifies, and thereafter continues to shrink. As described above, since the outer layer steel pipe and the product exhibit different thermal expansion/contraction patterns (behaviors) and have different expansion coefficients, a relative deviation between the two inevitably occurs during the cooling process to room temperature. In particular, the innermost ceramic layer often has a higher melting point than steel, so it solidifies and begins to shrink before the metal formed between the outer steel pipe and the ceramic layer.
Immediately after, the formed metal solidifies, shrinks following the ceramics, and is assumed to eventually become integrated, and then reach room temperature in a state that tightens the ceramics. However, in reality, the expansion and contraction behavior of the outer steel pipe, which is the mother pipe, is added to this, so the relative movement between the outer steel pipe and the formed metal or the interfacial force at that time (the force necessary to cause relative sliding) also comes into play. become.
ところで、遠心テルミツト法により長尺管を製
作すると、特殊な条件、例えば外層鋼管を極厚に
するか、強制冷却するような場合以外では、外装
鋼管と生成金属間は融着に近い状態となる。即ち
生成金属の自由な収縮が抑えられることになるの
で、先に述べたような生成金属−セラミツクス間
の収縮関係を取り得なくなる。 By the way, when long tubes are manufactured using the centrifugal thermite method, the outer steel tube and the produced metal will be in a state close to fusion unless special conditions are met, such as when the outer layer steel tube is made extremely thick or forced cooling is applied. . In other words, free shrinkage of the produced metal is suppressed, so that the shrinkage relationship between the produced metal and the ceramics as described above cannot be established.
生成金属とセラミツクス間は物理的接触状態に
あるが、界面にはかなりの凹凸があり、嵌合状態
ではその層間剪断移動に要する力は極めて大きく
なる。そしてセラミツクスの収縮は母管の収縮に
先んじて起り、かつ収縮速度も大きいため、上記
の如く生成金属の収縮が外装鋼管によつて拘束さ
れ、かつ生成金属−セラミツクス間の相対移動の
しがたい界面状態が加わると、セラミツクスの自
由収縮が制限されることになる。 Although the produced metal and the ceramic are in physical contact, there are considerable irregularities at the interface, and in the fitted state, the force required for interlayer shear movement becomes extremely large. Since the shrinkage of ceramics occurs before the shrinkage of the mother pipe and the shrinkage speed is high, the shrinkage of the produced metal is restrained by the outer steel pipe as described above, and relative movement between the produced metal and the ceramics is difficult. The addition of interfacial conditions limits the free shrinkage of ceramics.
こういう状態になる、セラミツクスには引張応
力が残留することになるが、引張強さが小さく、
延性のないセラミツクスはこれに耐えきれず、数
多くの引張割れを生ずることが多い。 In this state, tensile stress remains in the ceramics, but the tensile strength is small,
Non-ductile ceramics cannot withstand this and often develop numerous tensile cracks.
（問題点を解決するための手段）
本発明は上記の欠点であるセラミツクスの引張
り割れを生ぜしめない複合管の製造方法の提供に
係り、より具体的には上記引張割れの原因である
金属母管と生成金属層間の収縮過程における相対
移動、即ち滑りを円滑に行わせる方法であり、そ
の原理はテルミツト反応による金属母管の内壁の
加熱を制限乃至は緩和する手段であり、その手段
として、金属母管内面に、金属酸化物と金属還元
剤とでなるテルミツト剤を装填してテルミツト剤
層を形成せしめ、遠心力場内で該テルミツト剤層
に着火してテルミツト反応を行わしめて、前記金
属母管内面にテルミツト反応により生成される金
属層及びセラミツクス層を被覆形成する方法にお
いて、あらかじめ金属母管内面に薄肉金属円筒を
張りつけるか、あるいは金属粒層を形成し、更に
その内面にテルミツト剤層を形成してテルミツト
反応を行わせるものである。(Means for Solving the Problems) The present invention relates to a method for manufacturing a composite pipe that does not cause tensile cracking of ceramics, which is the above-mentioned drawback, and more specifically, to provide a method for manufacturing a composite pipe that does not cause the tensile cracking of ceramics, which is the above-mentioned drawback. It is a method of smoothing the relative movement, that is, sliding, during the contraction process between the tube and the generated metal layer, and its principle is a means to limit or moderate the heating of the inner wall of the metal mother tube due to thermite reaction. A thermite agent consisting of a metal oxide and a metal reducing agent is loaded onto the inner surface of the metal mother tube to form a thermite layer, and the thermite layer is ignited in a centrifugal force field to cause a thermite reaction. In the method of coating the inner surface of a tube with a metal layer and a ceramic layer generated by a thermite reaction, a thin metal cylinder is pasted on the inner surface of the metal main tube in advance, or a metal particle layer is formed, and then a thermite agent layer is further applied on the inner surface. This is what causes the thermite reaction to occur.
（作 用）
金属母管内面に薄肉金属円筒を張りつけ、或い
は金属粒を散布して管内面を被包し、更にその内
面にテルミツト剤を散布等し、遠心力場内で該テ
ルミツト剤に着火してテルミツト反応を行わさせ
ると、薄肉金属円筒或いは金属粒は反応熱により
軟化または溶融し、溶融生成物の遠心力を受けて
金属母管内面に略密着する。しかし反応熱の金属
母管への伝達は薄肉金属円筒或いは金属粒を介し
て行われるため、それによる吸熱や境界が熱伝達
障壁となり、金属母管内表面の最高到達温度は低
くおさえられる。(Function) A thin metal cylinder is attached to the inner surface of the metal main tube, or metal particles are sprinkled to cover the inner surface of the tube, and a thermite agent is further spread on the inner surface of the tube, and the thermite agent is ignited in a centrifugal force field. When the thermite reaction is carried out, the thin metal cylinder or metal grains are softened or melted by the heat of reaction, and are brought into close contact with the inner surface of the metal mother tube under the centrifugal force of the molten product. However, since the reaction heat is transferred to the metal main tube through the thin metal cylinder or metal grains, the resulting heat absorption and the boundary act as a heat transfer barrier, and the maximum temperature on the inner surface of the metal main tube is kept low.
（実施例）
本発明の一つの実施例として、金属母管内面に
薄肉金属円筒を張りつけて行う方法について第１
図、第２図を参照して述べる。両図において１は
金属母管を示し、素材として鋼管を使用する。５
は該母管１の内面に密着状に張りつけられた薄肉
金属円筒であり、その板厚は使用するテルミツト
剤の種類や量により異なるが、鋼管円筒の場合の
適正板厚は0.5〜2.0mmの範囲にある。このさい薄
肉のものを２枚重ねて円筒状にしたものを使用す
る場合は、その合計板厚を1.2mm以下とするのが
よく、この場合では２枚の板厚は良好な密着状態
になければならない。２はテルミツト剤で、金属
酸化物と金属還元剤との混合物、更にこの混合物
にケイ素化合物又は金属化合物が添加されたもの
等、テルミツト剤の種類には限定されないことは
勿論である。(Example) As an example of the present invention, the first example describes a method of attaching a thin metal cylinder to the inner surface of a metal main tube.
This will be described with reference to FIGS. In both figures, numeral 1 indicates a metal main pipe, and a steel pipe is used as the material. 5
is a thin-walled metal cylinder that is closely attached to the inner surface of the main pipe 1, and its thickness varies depending on the type and amount of thermite used, but in the case of a steel pipe cylinder, the appropriate thickness is 0.5 to 2.0 mm. in range. When using two thin-walled sheets stacked together to form a cylindrical shape, the total thickness should be 1.2 mm or less, and in this case, the two sheets must be in good contact. Must be. 2 is a thermite agent, and it is needless to say that the type of thermite agent is not limited, such as a mixture of a metal oxide and a metal reducing agent, or a mixture in which a silicon compound or a metal compound is added.
そこで、先ず金属母管１内に薄肉金属円筒５を
適宜手段で張りつけ（内装し）、さらにその内面
にテルミツト剤２を所定量散布等し、遠心力場内
で該テルミツト剤に着火してテルミツト反応を行
わしめる。 Therefore, first, a thin-walled metal cylinder 5 is pasted (inner-coated) inside the metal main tube 1 by an appropriate means, and a predetermined amount of thermite agent 2 is sprinkled on the inner surface of the tube, and the thermite agent is ignited in a centrifugal force field to cause a thermite reaction. to be carried out.
次に本発明の他の実施例として、金属母管内面
に金属粒層を形成する方法について、第３図、第
４図を参照して述べる。両図において１は金属母
管を示し、素材として鋼管を使用することは、前
記実施例と同一である。６′は該母管１の内面に
散布し母管内表面を被包する金属粒であり、６は
この金属粒により形成された金属粒層である。こ
の金属粒６′は鋼粒若しくはカツトワイヤーを例
示でき、直径１〜２mm、長さ５mm以下が好まし
く、このさい断面は円形でなくてもよい。また断
面は更に小さいものも使えるが、小さい程使用量
が増し不経済である。遠心力場内でかゝる金属粒
５′を先ず母管１内面に散布し、同母管１内表面
を被包する。次にその内面に（その上に）所定量
のテルミツト剤２を散布し、遠心力場内で該テル
ミツト剤に着火してテルミツト反応を行わしめ
る。このさいテルミツト剤２の種類、使用量ある
いは床敷鋼粒サイズにより散布量は異なるが、経
験的に５〜15Kg／m2の範囲が望ましい。このさい
５Kg／m2以下と金属粒が少なすぎると金属粒は完
全に溶融し、母管１内表面に部分溶着し、逆に15
Kg／m2より多すぎると底部に全く溶融しない部分
が残り生成層が浮き上がつたような一体感に欠け
る弱構造状態となる。 Next, as another embodiment of the present invention, a method for forming a metal grain layer on the inner surface of a metal main tube will be described with reference to FIGS. 3 and 4. In both figures, reference numeral 1 indicates a metal main pipe, and the use of a steel pipe as the material is the same as in the previous embodiment. Reference numeral 6' indicates metal grains that are scattered on the inner surface of the main tube 1 and covers the inner surface of the main pipe, and 6 is a metal particle layer formed by the metal particles. The metal grains 6' can be exemplified by steel grains or cut wires, and preferably have a diameter of 1 to 2 mm and a length of 5 mm or less, and in this case, the cross section need not be circular. A smaller cross section can also be used, but the smaller the cross section, the more it will be used, making it uneconomical. The metal particles 5' are first scattered on the inner surface of the main tube 1 in a centrifugal force field, and the inner surface of the main tube 1 is encapsulated. Next, a predetermined amount of thermite agent 2 is sprinkled on the inner surface (on it), and the thermite agent is ignited in a centrifugal force field to cause a thermite reaction. At this time, the amount of spraying varies depending on the type of thermite agent 2, the amount used, and the size of the bedding steel grains, but empirically, it is preferably in the range of 5 to 15 kg/m 2 . At this time, if the metal grains are too small (less than 5Kg/m2 ) , the metal grains will completely melt and will be partially welded to the inner surface of the main pipe 1.
If the amount exceeds Kg/m 2 , a part that does not melt at all remains at the bottom, resulting in a weak structural state in which the formed layer lacks a sense of unity, as if it were floating.
なお、第２図、第４図において３は生成金属層
であり、４はセラミツクス層を示す。第２図にお
いて、生成金属層３と薄肉金属円筒５との境界は
融着状態となつている。第３図において、金属粒
６′は大半が溶融し、生成金属層３と金属層６の
境界は明確ではない。 In addition, in FIGS. 2 and 4, 3 is a generated metal layer, and 4 is a ceramic layer. In FIG. 2, the boundary between the generated metal layer 3 and the thin metal cylinder 5 is in a fused state. In FIG. 3, most of the metal grains 6' are melted, and the boundary between the generated metal layer 3 and the metal layer 6 is not clear.
以下、本発明の更に具体的実施例を示すと次の
とおりである。 More specific examples of the present invention will be shown below.
実施例
外径101.6mm×厚さ3.2mm×長さ250mmの母管
（鋼管）の中に板厚１mmの鋼製円筒を略密着状態
で挿入し、その内面に1800ｇのテルミツト剤（酸
化鉄72重量％、アルミニウム24重量％、ケイ素４
重量％）を均一散布し、遠心テルミツト反応（回
転数1386rpm）を行わしめた。Example A steel cylinder with a plate thickness of 1 mm is inserted into a mother pipe (steel pipe) with an outer diameter of 101.6 mm, a thickness of 3.2 mm, and a length of 250 mm, and 1800 g of thermite agent (iron oxide 72 wt%, aluminum 24 wt%, silicon 4
% by weight) was uniformly dispersed, and a centrifugal thermite reaction (rotation speed: 1386 rpm) was performed.
製品内面にはα−Al2O3を中心組成とする緻密
でかつ引張割れのないセラミツクス層が形成さ
れ、母管（鋼管）と鋼製円筒間の密着状態も良好
で150Kg／cm2以上であつた。 A dense ceramic layer with α-Al 2 O 3 as the main composition and no tensile cracks is formed on the inner surface of the product, and the adhesion between the mother pipe (steel pipe) and the steel cylinder is good, and the product is rated at 150 kg/cm 2 or more. It was hot.
実施例
外装101.6mm×厚さ3.2mm×長さ250mmの母管
（鋼管）の中に略直径１mm×長さ３mmのカツトワ
イヤーの鋼粒を等厚層になるよう散布し、その上
に実施例で用いたテルミツト剤層を設け、遠心
テルミツト反応（回転数1386rpm）を行つた。Example: Steel grains of cut wire approximately 1 mm in diameter x 3 mm in length were scattered in an equal thickness layer in a mother pipe (steel pipe) with exterior 101.6 mm x thickness 3.2 mm x length 250 mm, and the test was carried out on top of it. The thermite agent layer used in the example was provided, and a centrifugal thermite reaction (rotation speed: 1386 rpm) was performed.
生成セラミツクス層は緻密で割れのないもので
あつた。生成物背面の鋼粒は母管（鋼管）と接す
る部分に一部未溶融のものが認められたが、粒間
隙を溶融金属が埋め、空隙のない良好な界面状態
が得られていた。そして母管と鋼粒間の密着力は
30Kg／cm2以上であつた。 The resulting ceramic layer was dense and free of cracks. Although some unmelted steel grains on the back side of the product were found in contact with the mother pipe (steel pipe), the molten metal filled the grain gaps and a good interfacial condition with no voids was obtained. And the adhesion force between the mother pipe and the steel grains is
It was over 30Kg/cm2.
（発明の効果）
従来の方法では、生成金属が母管に溶着に近い
状態となり、これが冷却（収縮）過程の両者の動
きを一体化する状況をつくり出していたが、本発
明のように薄肉金属円筒の内張り（内装）若しく
は金属粒層の形成により、母管の温度上昇を低く
押えることができるため、該母管内表面状態を全
く乱すことなく、即ち生成金属との滑らかな、面
接触状態を得ることが可能になつた。換言すれば
母管と生成金属が薄肉円筒もしくは金属粒層を介
して完全に縁切りされる形となる。このさい生成
物（セラミツクス）の収縮は温度が高いために母
管より先んじて起るが、両者の縁切りがなされて
いるので当然ながら母管の影響を受けない形態が
つくり出され、即ち自由収縮が出来ることにな
り、既述の母管の存在により引張応力の発生、ま
たこれに起因するセラミツクスの引張割れの発生
を回避することができ、従つて本発明は引張割れ
のない良好な複合管を製造することができたので
ある。(Effect of the invention) In the conventional method, the produced metal was in a state close to welding to the main tube, which created a situation in which the movements of the two were unified during the cooling (shrinkage) process, but with the present invention, thin-walled metal By forming a cylindrical lining (interior) or a metal grain layer, it is possible to suppress the temperature rise of the main tube to a low level. It became possible to obtain In other words, the mother pipe and the generated metal are completely separated by a thin cylinder or metal grain layer. At this time, the shrinkage of the product (ceramics) occurs before the mother tube due to the high temperature, but since the edges are cut off between the two, a form that is naturally not affected by the mother tube is created, that is, free shrinkage. The presence of the above-mentioned main tube makes it possible to avoid the generation of tensile stress and the generation of tensile cracks in ceramics caused by this. Therefore, the present invention provides a good composite tube without tensile cracks. was able to manufacture it.
第１図と第２図は本発明の一実施例を示し、第
１図は本発明に係る製造工程における母管の断面
図であり、テルミツト剤層が形成されたものを示
し、第２図は本発明の製造目的である複合管の断
面図である。第３図と第４図は本発明の他の実施
例を示し、第３図は第１図と同様の断面図、第４
図は第２図と同様の断面図である。第５図と第６
図は従来の遠心テルミツト法の製造工程における
母管等の断面図と複合管の断面図を示したもので
ある。
１……母管、２……テルミツト剤、３……金属
層、４……セラミツクス層、５……薄肉金属管、
６……金属粒層。
1 and 2 show one embodiment of the present invention, FIG. 1 is a cross-sectional view of a main tube in the manufacturing process according to the present invention, showing a thermite layer formed thereon, and FIG. 1 is a cross-sectional view of a composite pipe that is the object of manufacturing the present invention. 3 and 4 show other embodiments of the invention, with FIG. 3 being a sectional view similar to FIG. 1, and FIG.
The figure is a sectional view similar to FIG. 2. Figures 5 and 6
The figure shows a sectional view of a main tube, etc. and a sectional view of a composite tube in the conventional centrifugal thermite manufacturing process. DESCRIPTION OF SYMBOLS 1... Mother pipe, 2... Thermite agent, 3... Metal layer, 4... Ceramics layer, 5... Thin metal tube,
6...Metal grain layer.
Claims (1)
でなるテルミツト剤を装填してテルミツト剤層を
形成せしめ、遠心力場内で該テルミツト剤層に着
火してテルミツト反応を行わしめて、前記金属母
管内面にテルミツト反応により生成される金属層
及びセラミツクス層を被覆形成する方法におい
て、あらかじめ金属母管内面に薄肉金属円筒を張
りつけるか、あるいは金属粒層を形成し、更にそ
の内面にテルミツト剤層を形成してテルミツト反
応を行わせることを特徴とする複合管の製造方
法。1. A thermite agent consisting of a metal oxide and a metal reducing agent is loaded onto the inner surface of the metal main tube to form a thermite agent layer, and the thermite agent layer is ignited in a centrifugal force field to cause a thermite reaction. In the method of coating the inner surface of the main tube with a metal layer and a ceramic layer produced by a thermite reaction, a thin metal cylinder is pasted on the inner surface of the metal main tube in advance, or a metal particle layer is formed, and then a thermite agent layer is added to the inner surface of the metal layer. 1. A method for manufacturing a composite tube, comprising forming a thermite reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7957285A JPS61238969A (en) | 1985-04-15 | 1985-04-15 | Manufacture of composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7957285A JPS61238969A (en) | 1985-04-15 | 1985-04-15 | Manufacture of composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61238969A JPS61238969A (en) | 1986-10-24 |
| JPH0210868B2 true JPH0210868B2 (en) | 1990-03-09 |
Family
ID=13693711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7957285A Granted JPS61238969A (en) | 1985-04-15 | 1985-04-15 | Manufacture of composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61238969A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100729215B1 (en) | 2006-09-26 | 2007-06-19 | 한국지질자원연구원 | Ceramic lining steel pipe manufacturing apparatus and manufacturing method using the same |
-
1985
- 1985-04-15 JP JP7957285A patent/JPS61238969A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61238969A (en) | 1986-10-24 |
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| EXPY | Cancellation because of completion of term |