JPH0328255B2 - - Google Patents
Info
- Publication number
- JPH0328255B2 JPH0328255B2 JP13730283A JP13730283A JPH0328255B2 JP H0328255 B2 JPH0328255 B2 JP H0328255B2 JP 13730283 A JP13730283 A JP 13730283A JP 13730283 A JP13730283 A JP 13730283A JP H0328255 B2 JPH0328255 B2 JP H0328255B2
- Authority
- JP
- Japan
- Prior art keywords
- thermite
- cylindrical tube
- ceramic
- coating
- 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
- 239000003832 thermite Substances 0.000 claims description 52
- 239000000919 ceramic Substances 0.000 claims description 46
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 239000011230 binding agent Substances 0.000 claims description 8
- 150000003377 silicon compounds Chemical class 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 150000002736 metal compounds Chemical class 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 22
- 239000010959 steel Substances 0.000 description 22
- 229910004298 SiO 2 Inorganic materials 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 235000019353 potassium silicate Nutrition 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- 238000005524 ceramic coating Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 235000013980 iron oxide Nutrition 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910018084 Al-Fe Inorganic materials 0.000 description 2
- 229910018192 Al—Fe Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemically Coating (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、テルミツト反応を利用して、円筒管
内面にセラミツク層を被覆形成する複合構造管の
製造方法の改良に係り、特にそのセラミツク層の
品質の改善を図るための方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a composite structure tube in which a ceramic layer is coated on the inner surface of a cylindrical tube by using a thermite reaction, and in particular, to improve the quality of the ceramic layer. This relates to the method of
管内面にセラミツク層が被覆形成された複合構
造管は、セラミツク層が耐熱性、耐摩耗性、耐食
性等の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。 Composite structure pipes with a ceramic layer coated on the inner surface of the pipe are widely used as transport pipes for various fluids and industrial piping members because the ceramic layer exhibits good properties such as heat resistance, wear resistance, and corrosion resistance. It has a purpose.
この種の複合構造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。この方法を最も代表的なアルミニウム−
酸化鉄系のテルミツト反応を利用して、鋼管のよ
うな鉄又は鉄合金製円筒管の内面にアルミナ
（Al2O3）のセラミツクコーテイングを施す場合
を例に説明すると、第１図に示すように、鉄系円
筒管１内にアルミニウム（Al）と酸化鉄（Fe2O3
又はFe3O4）の各粉末あるいは粒子による一定比
率の混合物からなるテルミツト剤２を装填し、こ
れを高速回転による遠心力場内で着火して、下記
式に示す如きテルミツト反応を行なわせ、この発
熱反応により生成される溶融金属（Fe）と溶融
セラミツク（Al2O3）とを比重分離して、第２図
に示すように円筒管１の内面に金属層３を介して
所期のセラミツク層４を被覆形成するものであ
る。 Various methods have been used in the past to produce this type of composite structure pipe, and recently, the so-called centrifugal thermite method, which utilizes centrifugal force and thermite reaction, has been proposed as a preferred method. This method is applied to the most typical aluminum
Taking as an example the case where a ceramic coating of alumina (Al 2 O 3 ) is applied to the inner surface of an iron or iron alloy cylindrical pipe such as a steel pipe by utilizing the iron oxide-based thermite reaction, the process is as shown in Figure 1. In addition, aluminum (Al) and iron oxide (Fe 2 O 3
A thermite agent 2 consisting of a mixture of powders or particles of Fe 3 O 4 or The molten metal (Fe) and molten ceramic (Al 2 O 3 ) produced by the exothermic reaction are separated by specific gravity, and the desired ceramic is deposited on the inner surface of the cylindrical tube 1 via the metal layer 3, as shown in FIG. The layer 4 is formed as a cover.
Fe2O3＋2Al→Al2O3＋2Fe
＋199Kcal／Al2O31モル
3Fe3O4＋8Al→4Al2O3＋9Fe
＋194Kcal／Al2O31モル
この方法によれば、一般には上記のAl−酸化
鉄系のみならず種々の強還元性元素と金属酸化物
よりなるテルミツト反応系を利用することがで
き、その装填量を調整することによつて任意の金
属製円筒管に対して、その内面に所望の厚さで
種々のセラミツクコーテイングを簡単に施すこと
ができ、しかもそのセラミツクコーテイングは同
時に生成される金属層を介して円筒管に高い密着
状態で結合される利点を有する。 Fe 2 O 3 +2Al→Al 2 O 3 +2Fe +199Kcal/Al 2 O 3 1 mole 3Fe 3 O 4 +8Al→4Al 2 O 3 +9Fe +194Kcal/Al 2 O 3 1 mole According to this method, generally the above Al− Thermite reaction systems made of not only iron oxides but also various strong reducing elements and metal oxides can be used, and by adjusting the loading amount, the inner surface of any metal cylindrical tube can be used. Various ceramic coatings can be easily applied to the desired thickness, and the ceramic coating has the advantage that it can be bonded to the cylindrical tube in a highly adhesive manner via a metal layer produced at the same time.
ここで、この遠心テルミツト法においても最も
利用性が大で、かつ代表的な前述の鉄系円筒管に
対しAl−Fe酸化物系のテルミツト反応を適用す
る場合について更に考察すると、この場合の鉄系
円筒管の内面に被覆形成されるセラミツク層は、
前記反応式より明らかなように、α−Al2O3（コ
ランダム）を主とするものからなる。この場合に
おける遠心テルミツト法の問題点として、その生
成セラミツク層の気孔率が高いことが掲げられ
る。 Now, further consideration will be given to the case where the Al-Fe oxide-based thermite reaction is applied to the aforementioned iron-based cylindrical tube, which is the most widely used and typical example of the centrifugal thermite method. The ceramic layer coated on the inner surface of the cylindrical tube is
As is clear from the above reaction formula, it mainly consists of α-Al 2 O 3 (corundum). A problem with the centrifugal thermite method in this case is that the resulting ceramic layer has a high porosity.
そこで、本発明者等はこの問題を改善するた
め、先に特願昭56−144376号において、テルミツ
ト剤に添加物としてSiO2の粉末あるいは粒子を
添加する方法を提案した。この方法は、前記問題
の改善に大いに貢献したのであるが、尚、金属層
とセラミツク層との分離が不十分であり、またセ
ラミツク表面の平滑性に問題があつた。 Therefore, in order to improve this problem, the present inventors previously proposed in Japanese Patent Application No. 144376/1983 a method of adding SiO 2 powder or particles as an additive to the thermite agent. Although this method greatly contributed to the improvement of the above-mentioned problems, the separation of the metal layer and the ceramic layer was insufficient, and there were also problems with the smoothness of the ceramic surface.
本発明はかかる点に鑑みなされたもので、円筒
管内面にテルミツト反応を利用してセラミツクコ
ーテイングする場合、セラミツク層の気孔率の低
下をはじめ、金属層とセラミツク層の分離の促進
及び凝固後のセラミツク表面の平滑化、外観の改
善を目的としている。そして、その特徴とすると
ころは、円筒管内に、テルミツト剤を装填し、遠
心力場内で該テルミツト剤に着火し、テルミツト
反応を行なわせて、前記円筒管内面にテルミツト
反応により生成された金属及びセラミツク層を被
覆形成する方法において、前記テルミツト剤を装
填する前に、予め円筒管内面にバインダーを介し
て結合したケイ素化合物又は金属化合物粉末の被
膜を形成する点にある。 The present invention has been developed in view of the above, and when ceramic coating is applied to the inner surface of a cylindrical tube using thermite reaction, it reduces the porosity of the ceramic layer, promotes the separation between the metal layer and the ceramic layer, and improves the coating after solidification. The purpose is to smooth the ceramic surface and improve its appearance. The feature is that a thermite agent is loaded into a cylindrical tube, the thermite agent is ignited in a centrifugal force field, a thermite reaction occurs, and the metal and metal generated by the thermite reaction are formed on the inner surface of the cylindrical tube. The method for forming a coating with a ceramic layer consists in forming a coating of silicon compound or metal compound powder bonded via a binder on the inner surface of the cylindrical tube before loading the thermite agent.
以下本発明について詳述する。 The present invention will be explained in detail below.
先ず、本発明に使用する円筒管１について述べ
る。前記説明では、この円筒管１として鉄系のも
のについて述べたが、本発明に使用する円筒管１
は鉄系に限らず、テルミツト反応に耐える高融点
の金属、例えば銅、ニツケルなども例示でき、更
にコンクリート、石綿セメントのような無機質系
のものであつてもよい。また、該円筒管１は、予
め作成されたものである必要はなく、通常の遠心
鋳造により形成された円筒管をそのまま引き続い
て使用してもよい。 First, the cylindrical tube 1 used in the present invention will be described. In the above description, an iron-based cylindrical tube 1 was described as the cylindrical tube 1, but the cylindrical tube 1 used in the present invention
is not limited to iron-based materials, but may also include metals with high melting points that can withstand thermite reactions, such as copper and nickel, and may also be inorganic materials such as concrete and asbestos cement. Further, the cylindrical tube 1 does not need to be previously produced, and a cylindrical tube formed by ordinary centrifugal casting may be used as is.
次に、前記円筒管１内面に、バインダーを介し
て結合したケイ素化合物の一例としてSiO2粉末
の被膜の形成方法について述べる。該被膜は、
SiO2粉末に無機バインダー（例えば、水ガラス
水溶液）を加えて泥状にした後、これを前記円筒
管１内面に、刷毛やスプレーにより、均一な厚み
有する膜として形成し、しかる後に乾燥固化させ
たものである。第３図は、上記のようにしてバイ
ンダーを介して結合したSiO2粉末の被膜５を有
する円筒管１の横断面を示している。ここで、
SiO2のバインダーとしては、たとえば水ガラス
などが考えられ、粉末に対し、数％〜10数％ぐら
い加えることができる（場合によつては、30％ぐ
らいまで）。SiO2粉末の結合度を増したい場合
は、水ガラスを増量する。また、SiO2粉末の粒
子の大きさは、溶融セラミツクへの溶出の容易さ
から0.1mm以下が好ましく、使用するSiO2粉末の
重量は、使用テルミツト剤の重量の1/20〜1/10程
度とする。 Next, a method of forming a film of SiO 2 powder as an example of a silicon compound bonded to the inner surface of the cylindrical tube 1 via a binder will be described. The coating is
After adding an inorganic binder (for example, an aqueous water glass solution) to the SiO 2 powder to form a slurry, this is formed as a film with a uniform thickness on the inner surface of the cylindrical tube 1 by brushing or spraying, and then dried and solidified. It is something that FIG. 3 shows a cross section of a cylindrical tube 1 with a coating 5 of SiO 2 powder bonded via a binder as described above. here,
As a binder for SiO 2 , for example, water glass can be used, and it can be added to the powder in an amount of about several percent to several tens of percent (in some cases, up to about 30%). If you want to increase the bonding degree of SiO 2 powder, increase the amount of water glass. In addition, the particle size of the SiO 2 powder is preferably 0.1 mm or less for ease of elution into the molten ceramic, and the weight of the SiO 2 powder used is approximately 1/20 to 1/10 of the weight of the thermite agent used. shall be.
ところで、前記被膜５の生成素材は、SiO2で
あるが、生成素材としては他のケイ素化合物又は
金属酸化物を適用することができる。ここで、他
のケイ素化合物又は金属化合物又とは、セラミツ
クと固溶体を形成し、溶融セラミツクの流動性を
増し、凝固後のセラミツクの性能を向上させる酸
化物を意味し、例えばケイ素化合物として
Si3N4、金属化合物としてTiO2、ZrO2、CuO2、
MgO、BaO、CoO、NiO、MnO、Cr2O3、
Ni2O3、Mn3O4、NaF2、CaF2などを例示でき
る。 Incidentally, although the material for forming the film 5 is SiO 2 , other silicon compounds or metal oxides may be used as the material for forming the film 5 . Here, other silicon compounds or metal compounds mean oxides that form a solid solution with ceramics, increase the fluidity of molten ceramics, and improve the performance of ceramics after solidification. For example, as silicon compounds,
Si 3 N 4 , TiO 2 , ZrO 2 , CuO 2 as metal compounds,
MgO, BaO, CoO, NiO, MnO, Cr2O3 ,
Examples include Ni 2 O 3 , Mn 3 O 4 , NaF 2 and CaF 2 .
以上のようにして、円筒管１内面に、バインダ
ーを介して結合したSiO2粉末の被膜５を形成し
た後、第４図に示すように、該円筒管１を遠心機
金枠６内に挿入し、その両端を中心部に孔８を有
するバンド７，７で固定し、所定の回転に達した
ところで、テルミツト剤散布用の樋９をバンド７
の孔８へ挿入反転し、テルミツト剤２を被膜５が
形成された円筒管１内へ散布する。今、被膜５は
SiO2粉末が比較的強固に係合されているので、
単にSiO2粉末を遠心力で円筒管１内面に付着さ
せた程度のSiO2層に比べて、テルミツト剤２の
散布時に被膜５が破壊されることはなく、テルミ
ツト剤２が直に円筒管１内面に接触する心配がな
い。 After forming the coating 5 of SiO 2 powder bonded via the binder on the inner surface of the cylindrical tube 1 as described above, the cylindrical tube 1 is inserted into the centrifuge frame 6 as shown in FIG. Then, its both ends are fixed with bands 7, 7 having a hole 8 in the center, and when a predetermined rotation is reached, the gutter 9 for distributing thermite agent is connected to the band 7.
The thermite agent 2 is sprayed into the cylindrical tube 1 on which the coating 5 is formed. Now, coating 5 is
Since the SiO 2 powder is relatively tightly engaged,
Compared to a SiO 2 layer that is simply made by adhering SiO 2 powder to the inner surface of the cylindrical tube 1 using centrifugal force, the coating 5 is not destroyed when the thermite agent 2 is sprayed, and the thermite agent 2 is directly attached to the cylindrical tube 1. There is no need to worry about contact with the inside.
次に、前記テルミツト剤２が散布された円筒管
１を更に高速で回転させ所定の回転（通常、
GNoで70〜200）にしたところで、円筒管１中の
テルミツト剤２に着火し、テルミツト反応を起こ
させる。このとき被膜５は、テルミツト反応の高
温により、そのバインダーが解離し、粉末SiO2
層となり、溶融セラミツク中への溶出を容易にす
る。また、前記粉末SiO2層は、テルミツト反応
生成熱の円筒管１への熱伝導を防ぎ、つまり断熱
層として作用し、テルミツト反応による高温状態
を保持し、溶融セラミツク中の気泡の放出や金属
層とセラミツク層の分離を促進する。 Next, the cylindrical tube 1 sprayed with the thermite agent 2 is rotated at a higher speed to a predetermined rotation (usually
When the GNo is set to 70 to 200), the thermite agent 2 in the cylindrical tube 1 is ignited to cause a thermite reaction. At this time, the binder of the film 5 dissociates due to the high temperature of the thermite reaction, and the film 5 becomes powdered SiO 2
It forms a layer and facilitates elution into the molten ceramic. In addition, the powdered SiO 2 layer prevents the heat generated by the thermite reaction from being conducted to the cylindrical tube 1, that is, acts as a heat insulating layer, maintains the high temperature state caused by the thermite reaction, and prevents the release of air bubbles in the molten ceramic and the metal layer. and promotes the separation of ceramic layers.
かくして、テルミツと反応が開始されると、テ
ルミツト剤はその反応生成物たる溶融金属と溶融
セラミツクとに変り、さらにこれらは両者の比重
差に基づき分離される。この頃には、前記粉末状
と化したSiO2は、比重差により溶融アルミナ中
へ溶出し、Al2O3−SiO2系セラミツクを形成す
る。こうして、テルミツト反応が終了し、円筒管
１を金枠６より取り出すと、良質なセラミツク
が、その内面にコーテイングされた複合構造管が
得られる。 Thus, once the reaction with thermite is initiated, the thermite agent is converted into the reaction products molten metal and molten ceramic, which are further separated based on the difference in specific gravity between the two. At this time, the powdered SiO 2 dissolves into the molten alumina due to the difference in specific gravity, forming Al 2 O 3 —SiO 2 ceramic. When the thermite reaction is completed and the cylindrical tube 1 is taken out from the metal frame 6, a composite structure tube whose inner surface is coated with high-quality ceramic is obtained.
次に、本発明の実施例、比較例を掲げて説明す
る。 Next, examples and comparative examples of the present invention will be described.
実施例 １
円筒管として、外径101.6mm、厚さ4.2mm、全長
250mmの鋼管を使用し、管内面の錆を落とし磨い
た後、その内面にSiO2150ｇ（粒径約40μｍ以下）
に水と水ガラス、それぞれ100ｇ、50ｇを混合し
泥状にしたものを均一な厚みを有するように塗布
し、しかる後に自然乾燥させ、更に加熱乾燥して
水分を完全に除去し、厚みが約１〜２mmの被膜を
得た。Example 1 As a cylindrical tube, outer diameter 101.6 mm, thickness 4.2 mm, total length
After using a 250mm steel pipe and polishing the inner surface of the pipe to remove rust, 150g of SiO 2 (particle size of approximately 40μm or less) is applied to the inner surface.
Mix 100g and 50g of water and water glass, make a slurry, and apply it to a uniform thickness, then let it dry naturally, and then heat dry it to completely remove moisture, until the thickness is approx. A coating of 1-2 mm was obtained.
次に、この被膜付の鋼管を遠心機金枠内に挿入
し、その両端をバンドで固定した後、金枠を約
500rpmで回転し、Al−Fe酸化物系テルミツト剤
1500ｇを管内へ散布した。その後、金枠の回転を
1600rpmに上げたところで、管内テルミツト剤に
着火し、テルミツト反応を起こさせた。反応終了
後充分時間をおき、金枠を冷却させ、遠心機を停
止し金枠より鋼管を取り出し、セラミツク複合管
を得た。 Next, insert this coated steel pipe into the centrifuge metal frame, secure both ends with bands, and then close the metal frame to approximately
Rotates at 500 rpm, Al-Fe oxide thermite agent
1500g was sprayed into the tube. After that, rotate the gold frame.
When the speed was increased to 1,600 rpm, the thermite agent in the tube ignited, causing a thermite reaction. After a sufficient period of time had passed after the reaction, the metal frame was cooled, the centrifuge was stopped, and the steel tube was taken out from the metal frame to obtain a ceramic composite tube.
この複合鋼管の横断面を観察すると、鋼管の内
面より約1.5mmの生成鉄を介して、約3.0mmのセラ
ミツク層が形成されており、このセラミツク層は
極めて緻密であり、その表面は平滑であつた。ま
た、金属層とセラミツク層の分離もよく、明瞭に
その区分が判別できた。 Observing the cross section of this composite steel pipe, it is found that a ceramic layer of approximately 3.0 mm is formed from the inner surface of the steel pipe through approximately 1.5 mm of produced iron, and this ceramic layer is extremely dense and its surface is smooth. It was hot. In addition, the metal layer and ceramic layer were well separated, and their divisions could be clearly distinguished.
実施例 ２
円筒管として、外系101.6mm、厚さ4.2mm、全長
250mmの鋼管を使用し、内表面の錆を落として磨
いた後、その内面にSiO2約60ｇ（粒径約40μｍ以
下）に水と水ガラスを、それぞれ40ｇ、20ｇを混
合し泥状にしたものを均一な厚みを有するように
塗布し、しかる後に自然乾燥させ、更に加熱乾燥
させ水分を完全に除去し、該鋼管の内面に被膜を
形成した。Example 2 As a cylindrical tube, outer diameter 101.6 mm, thickness 4.2 mm, total length
A 250 mm steel pipe was used, and after polishing the inner surface to remove rust, the inner surface was mixed with approximately 60 g of SiO2 (particle size of approximately 40 μm or less), 40 g of water, and 20 g of water glass, respectively, to form a slurry. The material was coated to have a uniform thickness, and then air-dried, and then heated and dried to completely remove moisture, thereby forming a coating on the inner surface of the steel pipe.
次に、この被膜付の遠心機金枠内に、厚さ31mm
の黒鉛製円筒を介して挿入し、その両端をバンド
で固定した。黒鉛製円筒を介した理由は、黒鉛の
熱伝導率が、金枠の材料である鋼のそれより大き
く、前記被膜の作用を確認するのに好都合だから
である。ちなみに、黒鉛の熱伝導率は、
0.31cal／cm．sec.℃、鋼のそれは、0.13cal／cm．
sec.℃である。 Next, a 31 mm thick
It was inserted through a graphite cylinder, and both ends were secured with bands. The reason for using a graphite cylinder is that the thermal conductivity of graphite is higher than that of steel, which is the material of the metal frame, and it is convenient for confirming the effect of the coating. By the way, the thermal conductivity of graphite is
0.31 cal/cm. sec.℃, that of steel is 0.13cal/cm.
sec.℃.
そして、前記金枠を約500rpmで回転させ、
Fe2O3：Al＝699ｇ：236ｇからなるテルミツト剤
935ｇを前記鋼管内へ散布した後、回転を
1580rpm（GNOで130）に上げたところで、管内
テルミツト剤に着火し、テルミツト反応を起こさ
せた。反応終了後充分時間をおき、金枠を冷却さ
せ、遠心機を停止し金枠より鋼管を取り出し、セ
ラミツク複合鋼管を得た。 Then, rotate the metal frame at about 500 rpm,
Thermite agent consisting of Fe 2 O 3 :Al=699g:236g
After dispersing 935g into the steel pipe, rotate it.
When the speed was increased to 1580 rpm (130 for GNO), the thermite agent in the tube ignited, causing a thermite reaction. After a sufficient period of time had passed after the reaction, the metal frame was cooled, the centrifuge was stopped, and the steel tube was taken out from the metal frame to obtain a ceramic composite steel tube.
この複合鋼管の横断面を観察すると、実施例１
の場合と同様に、金属層とセラミツク層との分離
もよく、そのセラミツク層は非常に緻密なもので
あり、またその表面は、美麗で平滑であつた、ま
た、圧壊強度を調べたところ約2200Kg／cm2であつ
た。 Observing the cross section of this composite steel pipe, Example 1
As with the case of It was 2200Kg/ cm2 .
比較例 １
実施例２におけるセラミツク複合構造管の製造
条件において、鋼管内面に被膜を形成する点を被
膜を形成せず、他は同様の条件でセラミツク複合
構造管を製造したところ、金属層とセラミツク層
の分離が悪く、セラミツク表面には凹凸が生じ、
また微粉末状の白色汚れも目立つた。そして圧壊
強度を調べたところ、1900Kg／cm2であり実施例１
の場合より低い値を示した。Comparative Example 1 A ceramic composite structure pipe was manufactured under the same conditions as in Example 2 except that no film was formed on the inner surface of the steel pipe, and the metal layer and ceramic Layer separation is poor, causing unevenness on the ceramic surface.
In addition, fine powdery white stains were also noticeable. When the crushing strength was examined, it was found to be 1900Kg/cm 2 in Example 1.
The value was lower than that of .
比較例 ２
実施例２におけるセラミツク複合構造管の製造
条件において、鋼管内面に被膜を形成する点を被
膜を形成せず、またテルミツト剤として、実施例
２のものを、これにSiO265ｇを加えたものとし、
他は同様の条件でセラミツク複合構造管を製造し
たところ、未だ、金属層とセラミツク層分離が十
分でなく、また、セラミツク層表面に気孔が目立
つた。しかし、セラミツク層は全般的に非常に緻
密化されており、圧壊強度は約2480Kg／cm2と比較
的良い値を示した。Comparative Example 2 Under the manufacturing conditions of the ceramic composite structure pipe in Example 2, no film was formed on the inner surface of the steel pipe, and 65 g of SiO 2 was added to the material of Example 2 as a thermite agent. As a matter of fact,
When a ceramic composite structure tube was manufactured under the same conditions, the metal layer and ceramic layer were still not separated sufficiently, and pores were noticeable on the surface of the ceramic layer. However, the ceramic layer was generally very densified, and the crushing strength was approximately 2480 Kg/cm 2 , a relatively good value.
以上のように本発明によると、生成セラミツク
層の品質が他のものに比べて優れたものであるこ
とが判つたが、本発明者等は、更に前記被膜の作
用、つまりセラミツク層を良質化する原因となる
テルミツト反応の高温保持作用を確めるため、放
射温度計を用いて、実施例２、比較例１、比較例
２について、セラミツク生成中の鋼管内の温度状
態を観察した。 As described above, according to the present invention, it has been found that the quality of the produced ceramic layer is superior to that of other ceramic layers, but the present inventors have further improved the effect of the coating, that is, the quality of the ceramic layer. In order to confirm the high-temperature holding effect of the thermite reaction that causes this, the temperature conditions inside the steel pipes during ceramic formation were observed using a radiation thermometer for Example 2, Comparative Example 1, and Comparative Example 2.
この観察方法を述べると、第５図に示すように
放射温度計１２は、水平に設置された遠心機金枠
６の一方のバンド７から約３ｍ離れた位置に設置
された。そして、バンド７の孔８を通して、水平
方向と約18度の角度を有して、黒鉛製円筒１１中
の鋼管１０の内面で、鋼管１０の末端より約100
mm離れた位置の温度を測定すべく、放射温度計１
２の観測方向が設定され、その放射率は、0.3に
固定された。また、この放射温度計１２には、変
換器１２及びレコーダ１３が接続され、鋼管１０
の内面温度が自動的に記録された。 To describe this observation method, as shown in FIG. 5, the radiation thermometer 12 was installed at a position approximately 3 m away from one band 7 of the centrifuge metal frame 6, which was installed horizontally. Then, through the hole 8 of the band 7, the inner surface of the steel pipe 10 in the graphite cylinder 11 is inserted about 100 degrees from the end of the steel pipe 10 at an angle of about 18 degrees with the horizontal direction.
To measure the temperature at a distance of mm, a radiation thermometer 1
Two observation directions were set, and the emissivity was fixed at 0.3. Further, a converter 12 and a recorder 13 are connected to this radiation thermometer 12, and a steel pipe 10
The internal temperature was automatically recorded.
上記温度測定の結果を第６図に示す。第６図
は、見かけ温度2000℃を越えてからの経過時間に
伴う見かけの温度を示しており、セラミツクが溶
融状態であると考えられる2000℃以上の高温保持
時間は、実施例２の場合が、9.2秒、比較例１の
場合が6.6秒であり、実施例２の場合、つまり鋼
管９内面に被膜５を形成した場合が、他の場合、
つまり鋼管９内面に被膜５を形成しない場合に比
べて、高温保持時間が非常に長いことが確認され
た。 The results of the temperature measurement described above are shown in FIG. Figure 6 shows the apparent temperature with the elapsed time after the apparent temperature exceeds 2000°C. , 9.2 seconds, 6.6 seconds in the case of Comparative Example 1, and in the case of Example 2, that is, when the coating 5 was formed on the inner surface of the steel pipe 9, in other cases,
In other words, it was confirmed that the high temperature holding time was much longer than when the coating 5 was not formed on the inner surface of the steel pipe 9.
以上述べたように、本発明による複号構造管の
製造方法によれば、気孔率の低い緻密な、また、
金属層との分離が明瞭になされた、表面が平滑で
あり美麗なセラミツク層が、その内面にコーテイ
ングされた品質の優れたセラミツク複合構造管を
得ることができる。 As described above, according to the method for manufacturing a double-structured pipe according to the present invention, a dense pipe with low porosity and
It is possible to obtain a high-quality ceramic composite structure tube whose inner surface is coated with a smooth and beautiful ceramic layer that is clearly separated from the metal layer.
第１図及び第２図は、遠心テルミツト法の製造
工程を示す円筒管の横断面説明図であり、第１図
はテルミツト反応前のテルミツト剤装填状態を、
第２図は、テルミツト反応後における金属層を介
してのセラミツク層の被覆状態を示している。第
３図から第５図は、本発明の実施例を示し、第３
図は、被膜が形成された円筒管の横断面図、第４
図は、被膜が形成された円筒管にテルミツト剤散
布用樋の挿入中の状態説明図、第５図は、テルミ
ツト反応中の円筒管内面の温度を観測している状
態説明図、第６図は、見かけ温度2000℃を越えて
からの経過時間に対するテルミツト反応中の円筒
管内面の温度の関係を示す図である。
１……円筒管、２……テルミツト剤、３……金
属層、４……セラミツク層、５……被膜。
1 and 2 are explanatory cross-sectional views of a cylindrical tube showing the manufacturing process of the centrifugal thermite method, and FIG. 1 shows the thermite agent loaded state before the thermite reaction.
FIG. 2 shows how the ceramic layer is covered with the metal layer after the thermite reaction. 3 to 5 show embodiments of the present invention;
The figure is a cross-sectional view of a cylindrical tube with a coating formed thereon.
The figure is an explanatory diagram of the state in which the thermite dispersion gutter is being inserted into the cylindrical tube on which the coating has been formed. Figure 5 is an explanatory diagram of the state in which the temperature on the inner surface of the cylindrical tube is observed during the thermite reaction. Figure 6 is is a diagram showing the relationship between the temperature of the inner surface of the cylindrical tube during thermite reaction and the elapsed time after the apparent temperature exceeds 2000°C. DESCRIPTION OF SYMBOLS 1... Cylindrical tube, 2... Thermite agent, 3... Metal layer, 4... Ceramic layer, 5... Coating.
Claims (1)
場内で該テルミツト剤に着火し、テルミツト反応
を行なわせて、前記円筒管内面にテルミツト反応
により生成された金属及びセラミツク層を被覆形
成する方法において、前記テルミツト剤を装填す
る前に、予め円筒管内面にバインダーを介して結
合したケイ素化合物又は金属化合物粉末の被膜を
形成することを特徴とする複合構造管の製造方
法。1. A method of loading a thermite agent into a cylindrical tube, igniting the thermite agent in a centrifugal force field, causing a thermite reaction, and coating the inner surface of the cylindrical tube with a metal and ceramic layer generated by the thermite reaction. . A method for manufacturing a composite structure tube, characterized in that before loading the thermite agent, a coating of silicon compound or metal compound powder bonded via a binder is formed on the inner surface of the cylindrical tube in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13730283A JPS6027462A (en) | 1983-07-26 | 1983-07-26 | Production of pipe having composite construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13730283A JPS6027462A (en) | 1983-07-26 | 1983-07-26 | Production of pipe having composite construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6027462A JPS6027462A (en) | 1985-02-12 |
| JPH0328255B2 true JPH0328255B2 (en) | 1991-04-18 |
Family
ID=15195506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13730283A Granted JPS6027462A (en) | 1983-07-26 | 1983-07-26 | Production of pipe having composite construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027462A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61238976A (en) * | 1985-04-15 | 1986-10-24 | Agency Of Ind Science & Technol | Production of metal-ceramic composite pipe |
| JPS61238970A (en) * | 1985-04-15 | 1986-10-24 | Agency Of Ind Science & Technol | Manufacture of composite pipe |
| JPS6389677A (en) * | 1986-10-01 | 1988-04-20 | Agency Of Ind Science & Technol | Thick ceramic coating method |
| JPH06104904B2 (en) * | 1986-10-03 | 1994-12-21 | 工業技術院長 | Manufacturing method of composite structure pipe |
| JP2717541B2 (en) * | 1988-04-21 | 1998-02-18 | 株式会社小松製作所 | Method of forming ceramic layer on metal body |
-
1983
- 1983-07-26 JP JP13730283A patent/JPS6027462A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6027462A (en) | 1985-02-12 |
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