JPH03264175A - Production of clad pipe - Google Patents
Production of clad pipeInfo
- Publication number
- JPH03264175A JPH03264175A JP5818490A JP5818490A JPH03264175A JP H03264175 A JPH03264175 A JP H03264175A JP 5818490 A JP5818490 A JP 5818490A JP 5818490 A JP5818490 A JP 5818490A JP H03264175 A JPH03264175 A JP H03264175A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- rolling
- tube
- end side
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 101150110330 CRAT gene Proteins 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 235000012046 side dish Nutrition 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は円管を複層にしてそれらを接合せしめるクラッ
ド管の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a clad pipe in which circular pipes are made into multiple layers and joined together.
[従来の技術]
従来は円管を複層にして接合させる場合には、熱間押出
しによって押し出していたが、この方法では長さ方向に
クラット比が大きく変化しクラッド厚さの保証が容易で
はなかった。これを両端の管間間隙部を閉鎖せずに圧延
により製造、しようとすると、接合予定面が加熱中に酸
化されて接合が不完全となった。また両端の管間間隙部
を溶接によって閉鎖すると、複層を構成する各々の材料
の変形抵抗の差により各々が異なった伸びを生しようと
することにより、圧延中にある層の管は肉がだぶつき、
あるいは不足して製品とならないか後端部の溶接が破損
してこの部分が疵として残り、この溶接部より端部は製
品にできなかった。[Conventional technology] Conventionally, when joining circular pipes in multiple layers, they were extruded by hot extrusion, but with this method, the cladding ratio changes greatly in the length direction, making it difficult to guarantee the cladding thickness. There wasn't. When an attempt was made to manufacture this by rolling without closing the gaps between the tubes at both ends, the surfaces to be joined were oxidized during heating, resulting in incomplete joining. Furthermore, when the gap between the tubes at both ends is closed by welding, the tubes in one layer during rolling will elongate differently due to the difference in deformation resistance between the materials that make up the multilayer. baggy,
Alternatively, the welding at the rear end was damaged and remained as a flaw, and the end portion beyond this welded portion could not be manufactured into a product.
[発明が解決しようとする課題]
本発明は長さ方向にクラット比の変動が小さく、歩留の
良いクラッド管の製造法を提供することを目的とする。[Problems to be Solved by the Invention] An object of the present invention is to provide a method for manufacturing a clad pipe with small fluctuations in cladding ratio in the length direction and a high yield.
[課題を解決するための手段コ
上記の目的を達成するために、本発明のクラッド管の製
造法は次のように構成される。すなわち第1図ないし第
5図において、
l、外管1に内管2を挿入して複層とした複層管の圧延
開始端側の管間空隙部3は溶接、ろうづけまたはねじど
めにより外管1と内管2とを強固に固定して閉鎖し、前
記複層管の圧延終了端側の管間空隙部4は覆い材5で覆
って外管1と内管2とが摺動できる構造で閉鎖し、前記
の複層管を加熱したのち、複層管内にプラグ又はマンド
レル6を挿入し、複数本の傾斜ロール7間で圧延して管
同士を接合せしめることを特徴とするクラット管の製造
法である。[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a clad pipe of the present invention is configured as follows. In other words, in Figures 1 to 5, l. The inter-pipe gap 3 on the rolling start end side of the multilayer pipe made by inserting the inner pipe 2 into the outer pipe 1 is welded, brazed, or screwed. The outer tube 1 and the inner tube 2 are firmly fixed and closed, and the inter-pipe gap 4 on the rolling end side of the multilayer tube is covered with a covering material 5, so that the outer tube 1 and the inner tube 2 are slid together. The method is characterized in that after the multi-layer pipe is closed with a movable structure and heated, a plug or mandrel 6 is inserted into the multi-layer pipe and rolled between a plurality of inclined rolls 7 to join the pipes together. This is a method for manufacturing crat pipes.
この複層管の圧延開始端側の管間空隙部3は溶接、ろう
づけまたはねしとめにより複層管を強固に固定して閉鎖
して圧延開始時に各層が前端部から大きくずれないよう
に、モして前端が破損しないように構成する。前記複層
管の圧延終了端側の管間空隙部4は、圧延中の各層の伸
びの違いを吸収できるように固定されておらず、加熱中
及び開始までに接合予定面が酸化汚染されないように薄
板を巻き付けてワイア10によって縛り付けこの空隙部
を覆って閉鎖している。そして好ましくは3本以上、最
も好ましくは4本の傾斜ロール7間で圧延して管の複層
管の外径と肉厚を圧下して管同士を接合せしめる。The interpipe gap 3 on the rolling start end side of this multilayer pipe is firmly fixed and closed by welding, brazing, or screwing to prevent each layer from shifting significantly from the front end at the start of rolling. Construct it so that the front end will not be damaged due to damage. The inter-pipe gap 4 at the end of rolling of the multi-layer pipe is not fixed so as to absorb the difference in elongation of each layer during rolling, and is not fixed to prevent oxidation contamination of the surface to be joined during and before heating starts. A thin plate is wrapped around and tied with wire 10 to cover and close this gap. The tubes are then rolled between preferably three or more, most preferably four, inclined rolls 7 to reduce the outer diameter and wall thickness of the multi-layered tubes and join the tubes together.
2、本発明は好ましくは最外層管1または最内層管2の
何れかがチタンまたはチタン合金てあり、最内層管2ま
たは最外層管1の何れかが鋼または高合金であり、圧延
終了端側の管間空隙部3.4を覆う覆い材5がチタンで
あり、加熱温度が700℃ないし900℃であり、肉厚
圧下率が10%ないし25%であることを特徴とする上
記1項記載のクラッド管の製造法である。2. In the present invention, preferably either the outermost layer tube 1 or the innermost layer tube 2 is made of titanium or a titanium alloy, and either the innermost layer tube 2 or the outermost layer tube 1 is made of steel or a high alloy. Item 1 above, characterized in that the covering material 5 covering the side interpipe gap 3.4 is made of titanium, the heating temperature is 700°C to 900°C, and the wall thickness reduction rate is 10% to 25%. This is a method for manufacturing the described clad pipe.
ただし肉厚圧下率Rはt、を圧延機入側における合計肉
厚、t2を圧延機出側における合計肉厚として次の式で
定義する。However, the wall thickness reduction ratio R is defined by the following formula, where t is the total wall thickness at the entrance side of the rolling mill, and t2 is the total wall thickness at the exit side of the rolling mill.
チタンまたはチタン合金と鋼または高合金とは直接溶接
すると溶接部が容易に破損するので、第1図に示す様に
、同材質同士を溶接し、チタン系と銅系とはねじ継手か
またはろうづけとするのが良い。この場合には圧延終了
端側の管間空隙部3.4を覆う覆い材5が酸素を消費し
て接合予定面への酸素の侵入を防げるように、この覆い
材5は接合予定金属と同等以上に酸化され易いチタン以
上に活性な金属とする。加熱温度は接合部において鉄と
チタンの相互拡散が十分起きるように700℃とし、酸
化劣化や接合部の金属間化合物の成長を防ぐために90
0℃以下が良い。肉厚圧下率は十分な接合を行うために
10%以上とし、クラッド比の変動が大きくならないよ
うに25%以下が良い。Direct welding of titanium or titanium alloy and steel or high alloy will easily damage the weld, so as shown in Figure 1, the same materials should be welded together, and titanium and copper should be welded together using threaded joints or brazed joints. It is best to use it as a side dish. In this case, this covering material 5 is equivalent to the metal to be joined so that the covering material 5 covering the interpipe gap 3.4 on the rolling end side consumes oxygen and prevents oxygen from entering into the joining surface. The metal is more active than titanium, which is more easily oxidized. The heating temperature was set at 700°C to ensure sufficient interdiffusion of iron and titanium at the joint, and at 90°C to prevent oxidative deterioration and growth of intermetallic compounds at the joint.
The temperature should be below 0℃. The thickness reduction ratio is preferably 10% or more to achieve sufficient bonding, and 25% or less to prevent large fluctuations in the cladding ratio.
第1図には中間材8を示しており、この中間材の機能は
特に限定されるものではなく、例えば媒接効果を持つ材
料や金属間化合物を生じ易い材料や元素拡散を抑制する
機能を持つ材料や、熱伝導性の良いあるいは悪い材料や
、電気伝導性の良いあるいは悪い材料や、製造コストを
下げるための材料など介在させることができる・
第2図には圧延終了端側の覆い材はすでに覆い機能を十
分に発揮できない程度に変形して描かれているか、この
圧延終了端側では圧延か開始すると加工発熱により水素
や一酸化炭素を主成分とするガスが吹き出すので、もは
や酸素侵入の心配はなく、むしろこれらのガスが容易に
吹き出せるように、この覆い材が破れ易い或は外れ易い
或は変形し易い構造とするのが良い。Fig. 1 shows an intermediate material 8, and the function of this intermediate material is not particularly limited. Materials with good or bad thermal conductivity, materials with good or bad electrical conductivity, materials to reduce manufacturing costs, etc. can be interposed. has already been deformed to such an extent that it cannot fully exert its covering function, or at the end of rolling, when rolling starts, gases mainly composed of hydrogen and carbon monoxide are blown out due to the heat generated during rolling, so oxygen is no longer intruding. Rather than worrying about this, it is better to have a structure in which the covering material is easy to tear, come off, or deform so that these gases can be easily blown out.
[実施例]
第1図において外管1とカップリング9と空隙部覆い材
5とを純チタンとし、内管2を鋼とし、圧延開始端側の
外管1とカップリング9とは溶接、カップリンタ9と内
管2とはねしによって固定し、圧延終了端側の管間空隙
部3.4は覆い材5薄板を巻き付はワイアで縛って覆い
、750℃に加熱したのち、第2図ないし第5図に示す
4本の傾斜ロール7を用いて圧延した。この時の圧延前
の外管1の断面は外径88mm、内径80mm、内管2
の断面は外径79mm、内径44mm、マンドレル6直
径は42mm、仕上クラッド管は外径68mm、全厚1
2IIIIIlであり、接合状態は良好で、クラッド比
は全長にわたり21%ないし26%の範囲内にあり良好
であった。[Example] In Fig. 1, the outer tube 1, the coupling 9, and the gap covering material 5 are made of pure titanium, the inner tube 2 is made of steel, and the outer tube 1 and the coupling 9 on the rolling start end side are welded, The coupler 9 and the inner tube 2 are fixed with springs, and the inter-tube gap 3.4 at the end of rolling is covered with a thin plate of covering material 5 wrapped around and tied with wire. After heating to 750°C, Rolling was carried out using four inclined rolls 7 shown in FIGS. 2 to 5. At this time, the cross section of the outer tube 1 before rolling has an outer diameter of 88 mm, an inner diameter of 80 mm, and an inner tube 2.
The cross section of the pipe is outer diameter 79 mm, inner diameter 44 mm, mandrel 6 diameter is 42 mm, finished clad pipe has outer diameter 68 mm, total thickness 1
2IIIIIIl, the bonding condition was good, and the cladding ratio was within the range of 21% to 26% over the entire length, which was good.
[発明の効果]
以上述べた様に本発明により長さ方向にクラット比の変
動が小さく、歩留の良いクラッド管の製造法を提供する
ことができる。[Effects of the Invention] As described above, according to the present invention, it is possible to provide a method for manufacturing a clad pipe with small fluctuations in the cladding ratio in the length direction and a high yield.
第1図ないし第5図は本発明法の説明図であって、第1
図板層管の組立状態、第2図は複層管を傾斜ロール圧延
機で圧延している状態、第3図、第4図および第5図は
それぞれ第2図のA−A、B−B、C−C断面図である
。
1・・・外管、最外層管、2・・・内管、最内層管、3
.4・・・管間空隙部、5・・・覆い材、6・・・プラ
グまたはマドレル、7・・・傾斜ロール、8・・・中間
材、9・・・カップリング、I O−・・覆い材締め付
は材、1 ]、−・・溶接部、12−・・わし部。1 to 5 are explanatory diagrams of the method of the present invention, and the first
Figure 2 shows the assembled state of the layered pipe; Figure 2 shows the state in which the multilayer pipe is rolled with an inclined roll rolling mill; Figures 3, 4 and 5 show the A-A and B- of Figure 2 respectively B, CC sectional view. 1... Outer tube, outermost layer tube, 2... Inner tube, innermost layer tube, 3
.. 4... Inter-pipe gap, 5... Covering material, 6... Plug or madrel, 7... Inclined roll, 8... Intermediate material, 9... Coupling, I O-... Tighten the covering material by the material, 1], -... welded part, 12 -... seam part.
Claims (1)
端側の管間空隙部は溶接、ろうづけ又はねじどめにより
外管と内管とを強固に固定して閉鎖し、前記複層管の圧
延終了端側の管間空隙部は覆い材で覆って外管と内管と
が摺動できる構造で閉鎖し、前記の複層管を加熱したの
ち、複層管内にプラグ又はマンドレルを挿入し、複数本
の傾斜ロール間で圧延して管同士を接合せしめることを
特徴とするクラッド管の製造法。 2、最外層管または最内層管の何れかがチタンまたはチ
タン合金であり、最内層管または最外層管の何れかが鋼
または高合金であり、圧延終了端側の管間空隙部を覆う
覆い材がチタンであり、加熱温度が700℃ないし90
0℃であり、肉厚圧下率が10%ないし25%であるこ
とを特徴とする請求項1項記載のクラッド管の製造法。 ただし肉厚圧下率Rはt_1を圧延機入側における合計
肉厚、t_2を圧延機出側における合計肉厚として次の
式で定義する。 R=[(t_1−t_2)/t_1]×100[Scope of Claims] 1. In a multi-layered pipe formed by inserting an inner pipe into an outer pipe, the gap between the pipes on the rolling start end side is connected to the outer pipe and the inner pipe by welding, brazing or screwing. is firmly fixed and closed, and the gap between the tubes on the rolling end side of the multilayer tube is covered with a covering material and closed with a structure that allows the outer tube and the inner tube to slide, and the multilayer tube is closed. A method for manufacturing a clad pipe, which comprises heating, inserting a plug or a mandrel into the multilayer pipe, and rolling the pipes between a plurality of inclined rolls to join the pipes together. 2. Either the outermost layer tube or the innermost layer tube is made of titanium or a titanium alloy, and either the innermost layer tube or the outermost layer tube is made of steel or a high alloy, and a cover that covers the gap between the tubes on the rolling end side. The material is titanium and the heating temperature is 700℃ to 90℃.
2. The method for manufacturing a clad pipe according to claim 1, wherein the temperature is 0° C. and the wall thickness reduction rate is 10% to 25%. However, the wall thickness reduction rate R is defined by the following formula, where t_1 is the total wall thickness on the inlet side of the rolling mill, and t_2 is the total wall thickness on the outlet side of the rolling mill. R=[(t_1-t_2)/t_1]×100
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5818490A JPH03264175A (en) | 1990-03-12 | 1990-03-12 | Production of clad pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5818490A JPH03264175A (en) | 1990-03-12 | 1990-03-12 | Production of clad pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03264175A true JPH03264175A (en) | 1991-11-25 |
Family
ID=13076932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5818490A Pending JPH03264175A (en) | 1990-03-12 | 1990-03-12 | Production of clad pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03264175A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060196033A1 (en) * | 2003-07-09 | 2006-09-07 | Thomas Ficker | Annular composite workpieces and a cold-rolling method for producing said workpieces |
CN1330436C (en) * | 2003-11-20 | 2007-08-08 | 吉欣(英德)热轧不锈复合钢有限公司 | Method for making soldered hot-rolled composite metal tube |
CN112439789A (en) * | 2020-10-30 | 2021-03-05 | 太原理工大学 | Forming method of easy-to-demould core rod and metal composite pipe |
CN112496076A (en) * | 2020-10-30 | 2021-03-16 | 太原理工大学 | Rolling method of inner corrugated metal composite pipe |
-
1990
- 1990-03-12 JP JP5818490A patent/JPH03264175A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060196033A1 (en) * | 2003-07-09 | 2006-09-07 | Thomas Ficker | Annular composite workpieces and a cold-rolling method for producing said workpieces |
US8161620B2 (en) * | 2003-07-09 | 2012-04-24 | Technische Universität Dresden | Annular composite workpieces and a cold-rolling method for producing said workpieces |
CN1330436C (en) * | 2003-11-20 | 2007-08-08 | 吉欣(英德)热轧不锈复合钢有限公司 | Method for making soldered hot-rolled composite metal tube |
CN112439789A (en) * | 2020-10-30 | 2021-03-05 | 太原理工大学 | Forming method of easy-to-demould core rod and metal composite pipe |
CN112496076A (en) * | 2020-10-30 | 2021-03-16 | 太原理工大学 | Rolling method of inner corrugated metal composite pipe |
CN112439789B (en) * | 2020-10-30 | 2022-08-12 | 太原理工大学 | Forming method of easy-to-demould core rod and metal composite pipe |
CN112496076B (en) * | 2020-10-30 | 2022-08-12 | 太原理工大学 | Rolling method of inner corrugated metal composite pipe |
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