JPH022954B2 - - Google Patents
Info
- Publication number
- JPH022954B2 JPH022954B2 JP20276984A JP20276984A JPH022954B2 JP H022954 B2 JPH022954 B2 JP H022954B2 JP 20276984 A JP20276984 A JP 20276984A JP 20276984 A JP20276984 A JP 20276984A JP H022954 B2 JPH022954 B2 JP H022954B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- thermite
- reaction
- tube
- agent
- 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
- 239000003832 thermite Substances 0.000 claims description 50
- 238000006243 chemical reaction Methods 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 239000000919 ceramic Substances 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 49
- 239000002360 explosive Substances 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 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
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
- Other Surface Treatments For Metallic Materials (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、特に母管の軸方向に亘に均質な
セラミツクス層が形成される方法に関する。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 mother tube by using a thermite reaction, and particularly in the axial direction of the mother tube. The present invention relates to a method for forming a ceramic layer that is homogeneous throughout.
（従来の技術）
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
流体に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 pipe with a ceramic layer have good properties such as heat resistance, abrasion resistance, and corrosion resistance. It has a wide range of applications as a 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、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２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３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 tube, and recently, the so-called centrifugal thermite method, which utilizes centrifugal force and thermite reaction, has been proposed as a suitable manufacturing method. That is, this method, as shown in Figure 2,
A thermite agent made 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 to form a thermite agent layer 2, which is then subjected to centrifugal force due to high speed rotation. A fire is ignited in the field to cause a thermite reaction as exemplified by the formula below, and the molten metal and molten ceramic produced by this exothermic reaction are separated by specific gravity, and are deposited on the inner surface of the main tube 1 as shown in Fig. 3. A desired ceramic layer 4 is coated with a metal layer 3 interposed therebetween.
Fe2O3＋2Al→
Al2O3＋2Fe＋199Kcal／Al2O3モル
遠心テルミツト法を利用して管内に良質のセラ
ミツクス層を得ようとする場合、使用するテルミ
ツト剤の純度、粒度が重要なフアクターになる。
即ち、テルミツト反応による溶融生成物は、凝固
に至るまでに完全に比重分離がなされ、かつ分離
された各層内で脱気が十分に行えるだけの熱量を
層全体にわたつて確保できなければならないから
である。 Fe 2 O 3 +2Al→ Al 2 O 3 +2Fe + 199Kcal/Al 2 O 3 mol When trying to obtain a high quality ceramic layer inside a pipe using the centrifugal thermite method, the purity and particle size of the thermite agent used are important factors. Become.
In other words, the molten product from the thermite reaction must be completely separated in specific gravity before it solidifies, and it must be possible to secure enough heat throughout the layers to fully degas the separated layers. It is.
叙上の条件を満足する材料、配合系を母管内に
装填し、部分着火によりテルミツト反応を行わせ
ると、ある時間経過（通常、数秒〜数十秒、例え
ば、母管内径93.2mm×長さ250mmの場合、５，６
秒。）後、爆発的に全域に反応が伝播し、管内に
溶融状態が瞬時につくり出される。この現象は、
管内空気を瞬時に数倍に膨張させることにより、
両端開口部より高速気流の噴出を伴う。この高速
気流は、一端の未反応のテルミツト剤を伴い、大
量の粉塵として排出され、また溶融金属及び溶融
セラミツクスの一部に波打ち現象をもたらし、時
に母管両端に装着された湯止め用のドーナツ板を
乗り越える場合もある。 When materials and compounding systems that satisfy the above conditions are loaded into the main pipe and a thermite reaction is caused by partial ignition, a certain period of time (usually several seconds to several tens of seconds, for example, main pipe inner diameter 93.2 mm x length) For 250mm, 5,6
seconds. ), the reaction propagates explosively throughout the area, instantly creating a molten state inside the tube. This phenomenon is
By instantly expanding the air inside the pipe several times,
Accompanied by a jet of high-speed airflow from the openings at both ends. This high-speed airflow is accompanied by the unreacted thermite agent at one end, which is discharged as a large amount of dust. It also causes undulating phenomena in parts of the molten metal and molten ceramics, and sometimes causes the donuts attached to both ends of the main pipe to stop the hot water. Sometimes it goes over the board.
（発明が解決しようとする問題点）
叙上のテルミツト剤の爆発的な燃焼は、安全衛
生上の問題のみならず、生成層の均一性が得られ
ない弊害をもたらす。即ち、粉塵、溶融物の飛出
しがあると、
設定層厚が確保できない。(Problems to be Solved by the Invention) Explosive combustion of the thermite agent described above not only causes health and safety problems, but also causes the disadvantage that uniformity of the formed layer cannot be obtained. In other words, if there is dust or molten material flying out, the set layer thickness cannot be ensured.
中央部が薄くなり両端部が厚くなる。 The center becomes thinner and the ends become thicker.
熱分布ムラを生じ凝固過程の割れ、管及び該
管を装着する遠心機金枠に曲がりが生じる。 This causes uneven heat distribution, cracks during the solidification process, and bends in the tube and the centrifuge frame in which the tube is mounted.
等の問題が生じる。Problems such as this arise.
本発明は、斯かる問題点を解決するためになさ
れたものであり、テルミツト剤の爆発的な反応を
押さえると共に、軸方向に均質なセラミツクス層
を形成できる複合管の製造方法を提供することを
目的とする。 The present invention has been made to solve these problems, and aims to provide a method for manufacturing a composite tube that can suppress the explosive reaction of the thermite agent and form a homogeneous ceramic layer in the axial direction. purpose.
（問題を解決するための手段）
叙上の目的を達成するため、次の手段を講じ
る。即ち、母管内面に、金属還元剤と金属酸化物
との混合物から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
ツト剤層に着火しテルミツト反応を行わせて、前
記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、前記テルミツト剤層の内面に薄層の安定化
合物層を形成する。(Means to solve the problem) In order to achieve the stated purpose, the following measures will be taken. That is, a thermite agent made of a mixture of a metal reducing agent and a metal oxide is loaded on the inner surface of the 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 stable compound layer is formed on the inner surface of the thermite agent layer.
（作用）
上記手段によれば、テルミツト反応に関与する
テルミツト剤は、母管内面とテルミツト反応に関
与しない安定化合物層との間に挾装された状態と
なつているため、テルミツト剤の一部に着火され
ることにより生起したテルミツト反応は、その部
分から他の部分へ管軸方向に沿つて伝播する。こ
の反応伝播の形態は、穏やかな固液伝播であるの
で、従来のように爆発的な燃焼となるのを防止す
ることができる。(Function) According to the above means, the thermite agent that participates in the thermite reaction is sandwiched between the inner surface of the mother tube and the stable compound layer that does not participate in the thermite reaction. The thermite reaction caused by ignition propagates from that part to other parts along the tube axis direction. Since this reaction propagation mode is a gentle solid-liquid propagation, it is possible to prevent explosive combustion as in the conventional case.
（実施例） 次に実施例を掲げて説明する。(Example) Next, examples will be given and explained.
本発明に係る安定化合物の種類、量は、それが
テルミツト反応の生成により溶融した後、生成セ
ラミツクスに如何に作用するかで決定される。例
えば、SiO2の場合、一部がセラミツクス中に入
つてセラミツクスの緻密化を促進するのに寄与
し、またアルミナより比重が小さいため、かなり
の比率のものは表層に残留し、セラミツクス層の
内表面にガラス質層を形成する。その他のすべて
の安定化合物も適用可能であるが、セラミツクス
に与える影響（緻密度や反応生成物の特性等）を
先行調査した上で、また使用目的（耐熱性、耐摩
耗性等）に応じて、使用する化合物の種類、条件
を決定すべきである。尚、好適な安定化合物とし
てはSiO2，Al2O3，MgO，TiO2，ZrO2，B2O3，
CaO，Cr2O3、もしくは、これらをベースとし
た、酸化化合物（3Al2O3・2SiO2等）等を例示で
きる。 The type and amount of the stable compound according to the present invention is determined by how it acts on the resulting ceramic after it is melted by the formation of the thermite reaction. For example, in the case of SiO 2 , a part of it enters the ceramic and contributes to the densification of the ceramic, and since it has a lower specific gravity than alumina, a considerable proportion remains on the surface layer and is absorbed into the ceramic layer. Forms a glassy layer on the surface. All other stable compounds are also applicable, but they should be used after prior investigation of their effects on ceramics (density, properties of reaction products, etc.) and depending on the purpose of use (heat resistance, wear resistance, etc.). , the type of compound to be used, and the conditions should be determined. In addition, suitable stable compounds include SiO 2 , Al 2 O 3 , MgO, TiO 2 , ZrO 2 , B 2 O 3 ,
Examples include CaO, Cr 2 O 3 or oxide compounds based on these (3Al 2 O 3 .2SiO 2 etc.).
該安定化合物は、第１図に示すように、所定の
テルミツト剤層２が形成された母管１を低速回転
させながら粉体用のスプレー装置等により、テル
ミツト反応着火部（通常、一方の管端付近）を除
いて、前記テルミツト剤層２の内表面に均一に散
布れ、安定化合物層５が形成される。 As shown in FIG. 1, the stable compound is applied to the thermite reaction ignition section (usually one of the tubes) using a spray device for powder while rotating the main tube 1 on which a predetermined thermite agent layer 2 is formed at a low speed. The stabilized compound layer 5 is uniformly distributed over the inner surface of the thermite agent layer 2, except for the areas near the edges), thereby forming a stable compound layer 5.
該安定化合物層５の層厚は、使用する材料の種
類が化学反応系への関与の仕方に応じて決まるも
のであるが、通常１〜５mm程度の薄層でよい。 The thickness of the stable compound layer 5 is determined depending on the type of material used and how it participates in the chemical reaction system, but it may normally be a thin layer of about 1 to 5 mm.
その後、安定化合物層５が形成された母管１を
所定の回転数（100〜200G）に上げ、ガスバー
ナ、花火等を用いて、テルミツト剤が露出してい
る着火部に点火する。この点火により、テルミツ
ト反応を生起するが、この場合、反応は固液伝播
により管軸方向に進行する。即ち、従来の爆発的
な燃焼とはならず、穏やかな反応形態が得られ
る。 Thereafter, the main tube 1 on which the stable compound layer 5 has been formed is increased to a predetermined rotational speed (100 to 200 G), and the ignition portion where the thermite agent is exposed is ignited using a gas burner, fireworks, or the like. This ignition causes a thermite reaction, and in this case, the reaction proceeds in the tube axis direction due to solid-liquid propagation. That is, the conventional explosive combustion does not occur, but a mild reaction form is obtained.
ところで、前記安定化合物は、テルミツト反応
生成熱を吸収する様に作用するので、ややもする
と反応熱不足を起し、生成金属層とセラミツクス
層との分離が不充分となつたり、セラミツクスの
緻密さを欠く場合が生じる。このような問題を回
避するには、テルミツト本剤を活性の高い微粉末
とすればよく、また反応後、順次急速冷却される
のを避けるため、母管１の内面又は／及び外面を
断熱することも効果的である。例えば、外面側の
断熱方法として、母管の外面に断熱布、保温材を
巻付ける。断熱コーテイングをする、母管と該母
管を装着する遠心機金枠との間にライナ等を介し
て空気層を設ける等の方法がある。また、内面側
の断熱方法として、遠心機金枠内面とテルミツト
剤層との間に例えばSiO2層の如き安定化合物層
を形成しておき、反応−溶融直後の断熱効果を期
待する方法がある。 By the way, since the above-mentioned stable compound acts to absorb the heat generated by the thermite reaction, the reaction heat may become insufficient, resulting in insufficient separation between the formed metal layer and the ceramic layer, and the density of the ceramic. There may be cases where this is lacking. In order to avoid such problems, the THERMIT agent should be made into a highly active fine powder, and the inner and/or outer surfaces of the main tube 1 should be insulated to avoid rapid cooling after the reaction. It is also effective. For example, as a method of insulating the outer surface, a heat insulating cloth or heat insulating material is wrapped around the outer surface of the main pipe. There are methods such as providing a heat insulating coating or providing an air layer through a liner or the like between the main tube and the centrifuge frame to which the main tube is mounted. In addition, as a method of insulating the inner surface, there is a method in which a stable compound layer such as SiO 2 layer is formed between the inner surface of the centrifuge frame and the thermite agent layer, and an insulating effect is expected immediately after reaction and melting. .
尚、本発明に使用する母管１としては、鋼管、
非鉄金属管に限らず、コンクリート管、モルタル
管等の非金属管でもよい。 In addition, as the main pipe 1 used in the present invention, steel pipes,
It is not limited to non-ferrous metal pipes, but may also be non-metal pipes such as concrete pipes and mortar pipes.
次により具体的な製造実施例を掲げて説明す
る。 Next, more specific manufacturing examples will be described.
＜製造実施例 １＞
(1) 下記の母管内面に、下記のテルミツト剤を装
填し、その内面にSiO2（325メツシユ通過の粉
粒体）を100ｇ（層厚約１mm）を散布し、SiO2
層を形成した。<Manufacturing Example 1> (1) The following thermite agent was loaded onto the inner surface of the main tube, and 100 g (layer thickness: approximately 1 mm) of SiO 2 (powder that passed through a 325 mesh) was sprinkled on the inner surface. SiO2
formed a layer.
母管：内径93.2mm×長さ250mmの鋼管
テルミツト剤：325メツシユ通過のFe2O31345
ｇと100〜200メツシユのAl455ｇとの混
合物
(2) 母管を1400r.p.mにしたところで、テルミツ
ト剤に着火し、テルミツト反応を生起させた。
テルミツト反応は、穏やかに管軸方向に伝播し
（伝播速度：10mm／sec）爆発的な燃焼は起こら
なかつた。 Main pipe: Steel pipe with inner diameter of 93.2 mm x length of 250 mm Thermite agent: Fe 2 O 3 1345 passing through 325 mesh
(2) When the main tube was brought to 1400 rpm, the thermite agent was ignited and a thermite reaction occurred.
The thermite reaction propagated gently in the direction of the tube axis (propagation speed: 10 mm/sec), and no explosive combustion occurred.
(3) 反応終了後、気孔率６％の比較的緻密な
Al2O3セラミツクス層が金属層を介して母管内
面にライニングされた複合鋼管を得た。(3) After the reaction, a relatively dense structure with a porosity of 6%
A composite steel pipe was obtained in which the inner surface of the main tube was lined with an Al 2 O 3 ceramic layer via a metal layer.
＜製造実施例 ２＞
(1) 母管外面を保温材（SiO2焼成体）で被包す
る外は、製造実施例１と同様の条件で複合鋼管
を製造した。<Manufacturing Example 2> (1) A composite steel pipe was manufactured under the same conditions as Manufacturing Example 1, except that the outer surface of the main pipe was covered with a heat insulating material (SiO 2 fired body).
(2) テルミツト反応は、管軸方向に伝播する穏や
かなものであつた。(2) The thermite reaction was mild and propagated along the tube axis.
(3) 本製造実施例では、気孔率が３％の非常に緻
密なセラミツクスがライニングされており、保
温材の有効性が確認された。(3) In this manufacturing example, the lining was made of extremely dense ceramics with a porosity of 3%, and the effectiveness of the heat insulating material was confirmed.
（発明の効果）
以上述べたように、本発明によれば、母管内面
に形成されたテルミツト剤層の内面に、薄層の安
定化合物層を形成したから、テルミツト剤層の一
部に着火することにより生起したテルミツト反応
は、爆発的な燃焼を伴わず管軸方向に穏やかに伝
播する。而して、溶融物の飛出しが確実に防止で
き、母管内面に全体に亘り、生成層が均質に被覆
形成された複合管を得ることができる。(Effects of the Invention) As described above, according to the present invention, since a thin stable compound layer is formed on the inner surface of the thermite agent layer formed on the inner surface of the main tube, a part of the thermite agent layer is ignited. The thermite reaction generated by this process propagates gently in the direction of the tube axis without explosive combustion. As a result, splashing of the melt can be reliably prevented, and a composite tube can be obtained in which the inner surface of the main tube is uniformly coated with a generated layer.
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、テルミツト剤層及び安定化合物層
が形成されたものを示し、第２図は従来の遠心テ
ルミツト法の製造工程における母管の断面図であ
り、テルミツト剤層のみが形成されたものを示
し、第３図は本発明の製造目的である複合管の断
面図であり、金属層を介してセラミツクス層が被
覆形成されたものを示す。
１……母管、２……テルミツト剤層、３……金
属層、４……セラミツクス層、５……安定化合物
層。
Fig. 1 is a cross-sectional view of the main tube in the manufacturing process according to the present invention, showing the thermite agent layer and stable compound layer formed thereon, and Fig. 2 is a cross-sectional view of the main tube in the manufacturing process of the conventional centrifugal thermite method. FIG. 3 is a cross-sectional view of a composite tube in which only a thermite layer is formed, and FIG. show. DESCRIPTION OF SYMBOLS 1... Mother pipe, 2... Thermite agent layer, 3... Metal layer, 4... Ceramics layer, 5... Stable compound layer.
Claims (1)
合物から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
層に着火しテルミツト反応を行わせて、前記母管
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、
前記テルミツト剤層の内面に薄層の安定化合物層
を形成してなることを特徴とする複合管の製造方
法。1. A thermite agent made of a mixture of a metal reducing agent and a metal oxide is loaded onto the inner surface of the 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 a method for coating the inner surface of a main tube with a metal layer and a ceramic layer generated by a thermite reaction,
A method for manufacturing a composite pipe, comprising forming a thin stable compound layer on the inner surface of the thermite agent layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20276984A JPS6179776A (en) | 1984-09-26 | 1984-09-26 | Manufacturing method of composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20276984A JPS6179776A (en) | 1984-09-26 | 1984-09-26 | Manufacturing method of composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6179776A JPS6179776A (en) | 1986-04-23 |
| JPH022954B2 true JPH022954B2 (en) | 1990-01-19 |
Family
ID=16462863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20276984A Granted JPS6179776A (en) | 1984-09-26 | 1984-09-26 | Manufacturing method of composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6179776A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006284165A (en) * | 2005-03-07 | 2006-10-19 | Denso Corp | Exhaust gas heat exchanger |
| JP4907251B2 (en) * | 2006-07-26 | 2012-03-28 | フルタ電機株式会社 | Air blow device heat dissipation mechanism |
| CN103276389B (en) * | 2013-06-20 | 2016-08-17 | 山东大学 | Aluminium oxide strengthens aluminum-based in-situ composite materials and preparation method thereof with zirconium diboride |
-
1984
- 1984-09-26 JP JP20276984A patent/JPS6179776A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6179776A (en) | 1986-04-23 |
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| EXPY | Cancellation because of completion of term |