JPH0425694A - Manufacture of clad tee-tube - Google Patents
Manufacture of clad tee-tubeInfo
- Publication number
- JPH0425694A JPH0425694A JP2129861A JP12986190A JPH0425694A JP H0425694 A JPH0425694 A JP H0425694A JP 2129861 A JP2129861 A JP 2129861A JP 12986190 A JP12986190 A JP 12986190A JP H0425694 A JPH0425694 A JP H0425694A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- clad
- hot
- branch pipe
- 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 abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 21
- 238000005253 cladding Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 5
- 239000007790 solid phase Substances 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 230000002706 hydrostatic effect Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 16
- 230000037303 wrinkles Effects 0.000 description 12
- 229910000975 Carbon steel Inorganic materials 0.000 description 8
- 239000010962 carbon steel Substances 0.000 description 8
- 229910000990 Ni alloy Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 229910018487 Ni—Cr Inorganic materials 0.000 description 4
- 238000009750 centrifugal casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001513 hot isostatic pressing Methods 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 101150110330 CRAT gene Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、主としてサワー油井用の配管に使用するクラ
ッド１字管の製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a clad single-shaped pipe mainly used for piping for sour oil wells.
（従来の技術及びその問題点）
サワー油井の配管には、外層が高強度炭素鋼、内層が高
耐食性高ニッケル合金で形成されたクラット管を用いる
ことか望ましい。(Prior Art and its Problems) For piping in sour oil wells, it is desirable to use a crat pipe whose outer layer is made of high-strength carbon steel and whose inner layer is made of a highly corrosion-resistant high nickel alloy.
クラッド管自体は遠心鋳造法等によって容易に製造でき
るか、該クラッド管に対してＴ型継手をクラット管と同
様にして二層構造に形成することか技術的なネックとな
っている。The technical bottleneck is whether the clad pipe itself can be easily manufactured by centrifugal casting or the like, or whether a T-shaped joint for the clad pipe can be formed into a two-layer structure in the same manner as the clad pipe.
一般のクラッドＴ型継手は、まず遠心鋳造法によって、
内層と外層の材質が異なる真直なりラッド管を形成し、
次に護管を素材として後記する公知の熱間総型成形によ
ってＴ字管に形成し、該丁字管に必要な後加工を施して
いる。General clad T-type joints are first made by centrifugal casting.
Forms a straight rad tube with different materials for the inner and outer layers,
Next, the protective tube is used as a raw material to form a T-shaped tube by a known hot general molding method described later, and the T-shaped tube is subjected to necessary post-processing.
ところが外層か高強度炭素鋼、内層が高耐食性高ニッケ
ル合金で形成されたクラ・ソド管を素材として、上記方
法によって継手を製造すると下記の問題が生じる。However, when a joint is manufactured by the above method using a Clasod pipe whose outer layer is made of high-strength carbon steel and whose inner layer is made of a highly corrosion-resistant high nickel alloy, the following problems occur.
即ち、高耐食性高ニツケルオーステナイト合金の内層材
を鋳造成形した場合、金属結晶粒が粗くなり、これを熱
間総量成形による後加工を施すと、製品に大きな皺が生
じる。この皺はグラインダーで除去できるが、クラッド
管の内層厚みは３〜５ｍｍ程度であるから、内層を破壊
しない様に作業に慎重さが要求され、又、皺が深ければ
削り過ぎによる不良品となり、歩留りか低下する。That is, when an inner layer material of a highly corrosion-resistant high nickel austenite alloy is cast and formed, the metal crystal grains become coarse, and when this is subjected to post-processing by hot mass forming, large wrinkles occur in the product. These wrinkles can be removed with a grinder, but since the inner layer of the clad pipe is approximately 3 to 5 mm thick, careful work is required to avoid destroying the inner layer.Also, if the wrinkles are deep, the product will be defective due to excessive grinding. Yield decreases.
そこで、第６図に示す如く、熱間静水圧圧縮法によって
Ｔ字管を形成することも行なわれている。Therefore, as shown in FIG. 6, a T-shaped tube is also formed by hot isostatic compression.
上記方法は、第６図ｇの如く、予め公知の方法によって
製造した炭素鋼のＴ型管部材（８）中に、大小二本のパ
イプ（８０）（８１）をＴ型に組み合せて留置する。In the above method, two large and small pipes (80 and 81) are combined into a T-shape and placed in a carbon steel T-shape pipe member (8) manufactured in advance by a known method, as shown in Fig. 6g. .
Ｔ型管部材（８）とパイプ（８０） （８１）との間に
高ニッケル合金の粉末（３０）を充填し、Ｔ型管部材（
８）の開口部に蓋（８３）を施し、これを熱間静水圧圧
縮加工（ＨＩＰ ； Ｈｏｔ ｌ５ｏｓｔａｔｉｃ Ｐ
ｒｅｓｓ）を行ない、金属粉末（３０）を固相焼結させ
る。High nickel alloy powder (30) is filled between the T-shaped pipe member (8) and the pipes (80) (81), and the T-shaped pipe member (
A lid (83) is applied to the opening of 8), and this is subjected to hot isostatic pressing (HIP).
ress) to solid-phase sinter the metal powder (30).
蓋（８３）及びパイプ（８０）（８１）を機械加工及び
酸溶出によって除去し、第６図すの如く、外層（８）か
炭素鋼、内層（３１）が高ニッケル合金で形成されたＴ
字管を得ることができる。The lid (83) and pipes (80) and (81) were removed by machining and acid leaching, and the outer layer (8) was made of carbon steel and the inner layer (31) was made of high nickel alloy, as shown in Figure 6.
You can get a double tube.
上記第６図の方法によるＴ型継手の製造では、塑性加工
の様に製品に皺が生じることはない。In manufacturing the T-shaped joint by the method shown in FIG. 6 above, wrinkles do not occur in the product unlike plastic working.
しかし、Ｔ字状に曲った管部材（８）内で２本のパイプ
（８０）（８１）を組立てなければならす、この作業が
面倒であり、又、後工程におけるパイプ（８０）（８１
）の除去にも手間が掛かる。However, the two pipes (80) and (81) must be assembled inside the T-shaped pipe member (8), which is a troublesome task, and the pipes (80) and (81) must be assembled in the T-shaped pipe member (8).
) is also time-consuming to remove.
そこで出願人は、第５図に示す工程によるＴ字管の製法
を提案した（特願平２−２４８７６号）。Therefore, the applicant proposed a method for manufacturing a T-tube using the steps shown in FIG. 5 (Japanese Patent Application No. 2-24876).
即ち、第５図ｇに示す如く、炭素鋼で形成した外管（２
）の内側に、Ｎ ｉ−Ｃｒ系圧延板材にて成形した内管
（３）を挿入し、熱間静水圧圧縮を行なってクラッド管
（１）を形成し、該クラッド管を熱間総量成形によって
Ｔ字管に形成する。That is, as shown in Fig. 5g, an outer tube (2
), an inner tube (3) formed from Ni-Cr rolled plate material is inserted, hot isostatic compression is performed to form a clad tube (1), and the clad tube is subjected to hot mass forming. to form a T-tube.
熱間総量成形の工程は、第５図Ｃの如く、クラッド管（
１）をプレス加工にて断面楕円状の扁平体に形成する。The process of hot mass forming is as shown in Figure 5C.
1) is formed into a flat body with an elliptical cross section by press working.
第１図ｄに示す如く、上記断面楕円状に形成した管を台
（５）上に載せ、管の両側にて長径線を圧縮して、第５
図ｅの如く、管（１）の中央部に凸部（１１）を形成す
る。As shown in FIG. 1d, the tube formed into an elliptical cross section is placed on the table (5), and the long diameter line is compressed on both sides of the tube, and the fifth
As shown in Figure e, a convex portion (11) is formed in the center of the tube (1).
次に第５図ｆの如く、凸部（１１）の頂部及び変形した
管の両端部を切断して略Ｔ型に形成する。Next, as shown in FIG. 5f, the top of the convex portion (11) and both ends of the deformed tube are cut to form a substantially T-shape.
次に第５図ｇの如、＜、管内に治具（６）を通して、管
の内径を規格寸法に揃える。治具（６）は外周がテーパ
面（６１）に形成され、小径部側の端面中央に引張り用
の短軸（６２）が突設されており、管を固定して波管の
一端から治具（６）を無理に引っ張り込み、管の他端及
び中央開口から引き出す。これによって管か内側から外
側に押圧されて塑性変形し、管の口径が規格寸法に仕上
がる。管の内面はグラインダー等によって平滑に仕上げ
る。Next, as shown in Fig. 5g, a jig (6) is passed into the tube to align the inner diameter of the tube to the standard size. The jig (6) has a tapered outer periphery (61) and a short shaft (62) for tension protruding from the center of the end face on the small diameter side. Pull the tool (6) by force and pull it out from the other end of the tube and the central opening. As a result, the tube is pressed from the inside to the outside and plastically deforms, and the diameter of the tube is finished to the standard size. The inner surface of the tube is finished smooth using a grinder or the like.
上記第５図の方法で製造したＴ字管（７）は、内管（３
）を形成するＮｉ−Ｃｒ系圧延材の結晶粒径が極めて小
さいために、熱間総型加工の際に皺の発生を可及的に抑
えることができた。The T-shaped tube (7) manufactured by the method shown in Fig. 5 above has an inner tube (3
) Since the crystal grain size of the Ni-Cr-based rolled material forming the material is extremely small, it was possible to suppress the generation of wrinkles as much as possible during hot mold processing.
しかし、Ｔ字管（７）の中央枝管（７１）の基端に皺（
７２）が生じることは抑えきれなかった。これは、第５
図ｅの工程で、管の両側を押圧した際に、中央凸部（１
１）の両側か座屈変形を起こすためである。However, there are wrinkles (
72) could not be prevented from occurring. This is the fifth
In the process shown in Figure e, when pressing both sides of the tube, the central convex part (1
This is because buckling deformation occurs on both sides of 1).
本発明は、第５図の製法に於て、材料となるクラッド管
（１）を偏肉とすることにより上記問題を解決できるク
ラッド１字管の製法を明らかにするものである。The present invention clarifies a method for manufacturing a single-shaped clad tube that can solve the above problem by using the clad tube (1) as a material with uneven thickness in the manufacturing method shown in FIG.
（課題を解決する手段）
本発明は、外管（２）と内管（３）との間に管軸に沿っ
て板材（４）を介装し、これを熱間静水圧圧縮加工（Ｈ
ＩＰ ； Ｈｏｔ ｌ５ｏｓｔａｔｉｃ Ｐｒｅｓｓ）
を行なって偏肉のクラッド管（１）を形成し、該クラッ
ド管（１）を厚肉部（ｌＯ）が中央枝管（７１）となる
様に熱間総量成形を行なってＴ字状に形成し、中央枝管
（７１）の先端を切断し、該枝管の開口及び両端の開口
を成形治具（６）を通して所定の寸法に仕上げてクラッ
ド１字管を製造する。(Means for Solving the Problem) The present invention interposes a plate material (4) between the outer tube (2) and the inner tube (3) along the tube axis, and processes this by hot isostatic pressing (H
IP; Hot 15ostatic Press)
to form a cladding pipe (1) with uneven thickness, and then hot forming the cladding pipe (1) into a T-shape so that the thick walled part (lO) becomes the central branch pipe (71). The tip of the central branch pipe (71) is cut, and the opening of the branch pipe and the openings at both ends are finished to a predetermined size through a forming jig (6) to produce a clad single-shaped pipe.
（作用及び効果）
熱間静水圧圧縮加工によって形成されたクラッド管（１
）は、内層も外層も金属の結晶粒か極めて細かい特徴が
あるから、熱間総型成形による後加工にて所望の継手形
状に形成しても、皺の発生を可及的に抑えることがでる
。(Function and Effect) Clad pipe (1
), both the inner and outer layers have metal crystal grains or extremely fine characteristics, so even if the desired joint shape is formed by post-processing by hot molding, it is possible to suppress the occurrence of wrinkles as much as possible. Out.
予めクラッド管（１）を偏肉に形成して、皺の生じ易い
中央枝管（７１）の基端部近傍を厚肉としているため、
クラッド管（１）の両側を加圧して中央部に凸部（６１
）を形成する際、座屈変形による深い皺の発生を防止で
きる。Since the clad pipe (1) is formed in advance to have uneven thickness, and the vicinity of the proximal end of the central branch pipe (71) where wrinkles are likely to occur is made thicker,
Pressurize both sides of the cladding pipe (1) to form a convex part (61) in the center.
), it is possible to prevent the formation of deep wrinkles due to buckling deformation.
又、厚肉部（ｌＯ）はクラッド管の内層と同一材料で形
成されているため、グラインダーにて内面を平滑に仕上
げる際、内層に異種金属が表出することを防止できる。Further, since the thick wall portion (lO) is formed of the same material as the inner layer of the cladding tube, when smoothing the inner surface with a grinder, it is possible to prevent dissimilar metals from being exposed in the inner layer.
（実施例）
Ｔ字管の材料となるクラッド管（１）は、第１図すに示
す如く、一部が軸方向の全長に亘って厚肉部（１０）と
なっている。(Example) As shown in FIG. 1, a clad pipe (1) that is a material for a T-shaped pipe has a thick wall part (10) over its entire length in the axial direction.
上記クラッド管（１）は、第１図ｇ及び第２図に示す如
く、真直外管（２）内に余裕のある状態に偏心して内Ｗ
（３）を挿入し、外管（２）と内管（３）との間に管軸
に沿って板材（４）を介装し、外管（２）、内管（３）
及び板材（４）の端面に於ける境界部に全周に亘って電
子ビーム溶接を施し、管壁間を脱気密封した後、公知の
熱間静水圧圧縮を行なう。As shown in Fig. 1g and Fig. 2, the cladding pipe (1) is eccentrically placed inside the straight outer pipe (2) so that the inner W
(3), insert a plate material (4) along the tube axis between the outer tube (2) and the inner tube (3), and then insert the outer tube (2) and the inner tube (3).
Then, electron beam welding is applied to the entire boundary at the end face of the plate material (4), and after the tube walls are degassed and sealed, known hot isostatic compression is performed.
外管（２）は遠心鋳造にて形成された炭素鋼管であり、
重量％で、ＣＯ，１０，Ｓｉ Ｏ，２０、Ｍｎ０９３、
Ｐ Ｏ，０１？、Ｓ Ｏ，００９、Ｎｉ ０．５１ＳＣ
ｒ ００６、Ｍ。The outer tube (2) is a carbon steel tube formed by centrifugal casting,
In weight%, CO,10, SiO,20, Mn093,
P O,01? , SO,009, Ni 0.51SC
r 006, M.
Ｏ，１８、ｖ００７、残部Ｆｅである。O, 18, v007, remainder Fe.
内管（３）はｌＮ５２５、ｌＮ６２５等の高ニツケル合
金圧延板を筒状に曲げ、シームレス溶接して形成されて
いる。内管（３）の成分は、例えば、Ｃ００５以下、Ｓ
ｉ１．０以下、Ｍｎ １．０以下、ＰＯ１０３以下、Ｓ
Ｏ，０３以下、Ｎ１３８−４６、Ｃｒ １９．５〜
２３５、Ｍｏ ２．５−３．５、Ｃｕ １．５−３．０
、Ｎｂ０６〜１．２、残部Ｆｅからなる。The inner tube (3) is formed by bending a high nickel alloy rolled plate such as IN525 or IN625 into a cylindrical shape and seamlessly welding it. The components of the inner tube (3) are, for example, C005 or less, S
i1.0 or less, Mn 1.0 or less, PO103 or less, S
O, 03 or less, N138-46, Cr 19.5~
235, Mo 2.5-3.5, Cu 1.5-3.0
, Nb06 to 1.2, and the balance is Fe.
板材（４）は、内管（３）と同じ材料で形成されている
。The plate material (4) is made of the same material as the inner tube (3).
熱間静圧圧縮加工（ＨＩＰ ； Ｈｏｔ ｌ５ｏｓｔａ
ｔｉｃ Ｐｒｅｓｓ）の条件は、１１００℃、圧力１２
００ｋｇ／ｃボ、加圧時間１２０分である。Hot isostatic pressing (HIP)
tic Press) conditions are 1100℃, pressure 12
The pressure was 00 kg/c and the pressurization time was 120 minutes.
上記熱間静圧圧縮加工によって、外管（２）、板材（４
）、内管（３）が固相拡散接合し、第１図すに示す如く
、板材（４）との対応部分が厚肉となったクラッド管（
１）が製造できる。Through the above hot isostatic compression process, the outer tube (2), plate material (4
), the inner tube (3) is solid phase diffusion bonded, and as shown in Figure 1, the clad tube (4) has a thick wall corresponding to the plate material (4).
1) can be manufactured.
上記の方法で形成したクラッド管（１）を素材として１
０００℃±５０℃の温度雰囲気中で、熱間総型成形加工
にて継手を形成する。Using the clad pipe (1) formed by the above method as a material, 1
The joint is formed by hot molding in a temperature atmosphere of 000°C ± 50°C.
熱間総型成形の手順は、第１図ｇの如く、クラッド管（
１）をプレス加工にて断面楕円状の扁平体に形成する。The procedure for hot molding is as shown in Figure 1g.
1) is formed into a flat body with an elliptical cross section by press working.
このとき、クラッド管（１）の厚内部（ｌＯ）が楕円の
長径線上に位置する様に加圧する。At this time, pressure is applied so that the thick interior (lO) of the cladding pipe (1) is located on the major axis of the ellipse.
第１図ｇに示す如く、上記断面楕円状に形成したクラッ
ト管（１）を台（５）上に載せ、管の両側にて長径線を
圧縮して、第１図ｇの如く、クラット管（１）の中央部
に凸部（１１）を形成する。As shown in Fig. 1g, the cratted pipe (1) formed into an elliptical cross section is placed on the stand (5), and the long diameter line is compressed on both sides of the pipe to form the cratted pipe as shown in Fig. 1g. A convex portion (11) is formed in the center of (1).
次に第１図ｆの如く、凸部（ＩＩ）の頂部及び変形した
管の両端部を切断して略Ｔ型に形成する。Next, as shown in FIG. 1f, the top of the convex portion (II) and both ends of the deformed tube are cut to form a substantially T-shape.
次に第１図ｇの如く、管内に治具（６）を通して、管の
内径を規格寸法に揃える。Next, as shown in Figure 1g, a jig (6) is inserted into the tube to align the inner diameter of the tube to the standard size.
上記熱間総型成形において、加熱条件か９５０°Ｃ以下
であれば、材料の軟化が不足して加工不能である。In the above-mentioned hot mold forming, if the heating conditions are below 950°C, the material is insufficiently softened and cannot be processed.
１０５０８Ｃ以上であると外層炭素鋼に肌荒が生しる。If it is 10508C or higher, the outer layer carbon steel will have a rough surface.
熱間静水圧圧縮によって形成されたクラット管（１）は
、内層も外層も金属の結晶粒か極めて細かい特徴がある
から、熱間総型成形による後加工にて所望のＴ字状に形
成しても、皺の発生を可及的に抑えることがでる。Since the crat tube (1) formed by hot isostatic pressing has extremely fine metal crystal grains in both the inner and outer layers, it can be formed into the desired T-shape by post-processing by hot molding. However, the appearance of wrinkles can be suppressed as much as possible.
予め材料クラッド管（１）を、偏肉に形成して、皺の生
し易い中央枝管（７１）の基端部近傍を厚肉としたため
、クラッド管（１）の両側を加圧して中央部に凸部（６
１）を形成する際、深い皺か生しることを防止できる。The material clad pipe (1) was formed in advance to have an uneven thickness so that the vicinity of the proximal end of the central branch pipe (71), where wrinkles easily form, was thickened, so both sides of the clad pipe (1) were pressurized and the center Convex part (6
1) When forming, it is possible to prevent the formation of deep wrinkles.
第３図は、クラッド管を形成する他の実施例を示してい
る。FIG. 3 shows another embodiment of forming a cladding tube.
製品の外層となる真直外管（２）内に波管と同心に、補
助管（２０）を余裕のある状態に偏心して挿入する。外
管（２）と補助管（２０）との間に環状空間を形成し、
該空間にＮｉ−Ｃｒ系粉末合金（３０）を充填する。電
子ビーム溶接にてパイプの両端に環状蓋（８３）を施し
て熱間静水圧圧縮加工を行なう。The auxiliary tube (20) is eccentrically inserted into the straight outer tube (2), which becomes the outer layer of the product, concentrically with the wave tube and with enough room. forming an annular space between the outer tube (2) and the auxiliary tube (20);
The space is filled with a Ni-Cr powder alloy (30). Annular caps (83) are applied to both ends of the pipe by electron beam welding, and hot isostatic compression processing is performed.
外管（２）は前記同材にして遠心鋳造にて形成された炭
素鋼管である。The outer tube (2) is a carbon steel tube made of the same material and formed by centrifugal casting.
又、Ｎｉ−Ｃｒ系粉末合金は、Ｃ００５、ＳｉＯ，４８
、Ｎｉ６４．９、Ｃｒ ２１．９、Ｍｏ ９．０、Ｎｂ
十Ｔａ ３．４６、残部Ｆｅからなるアルゴンアトマイ
ズ粉末である。In addition, Ni-Cr powder alloys include C005, SiO, 48
, Ni64.9, Cr 21.9, Mo 9.0, Nb
It is an argon atomized powder consisting of 10 Ta 3.46 and the balance Fe.
熱間静圧圧縮加工の条件は、８００〜１２５０℃、圧力
１００〜２０００ｋｇｆ／ｃ耐、加圧時間１５〜１２０
分である。The conditions for hot isostatic compression processing are 800-1250℃, pressure 100-2000kgf/c, and pressurization time 15-120℃.
It's a minute.
粉末合金は固相焼結し外管（２）及び補助管（２０）と
一体化する。The powder alloy is solid-phase sintered and integrated with the outer tube (2) and the auxiliary tube (20).
温度が８００℃以下であれば、粉末合金が焼結緻密化せ
ず、１２５０℃以上であると粉末合金が溶融し結晶粒子
が大きくなる。又、外層と反応して耐食層の組成が変化
する。If the temperature is 800° C. or lower, the powder alloy will not be sintered and densified, and if the temperature is 1250° C. or higher, the powder alloy will melt and the crystal grains will become large. Moreover, the composition of the corrosion-resistant layer changes by reacting with the outer layer.
圧力が１００ｋｇｆ／ｃ ｒｒｒ以下であると、焼結緻
密化せず、２０００ｋｇｆ／ｃ ｒｄ以上にすることは
装置の限界の問題が生じる。If the pressure is less than 100 kgf/crrr, sintering will not be densified, and if the pressure is more than 2000 kgf/crrr, there will be a problem of equipment limitations.
又、加圧時間が１５分以下であると、緻密化せず、１２
０分以上加圧しても変化なく無駄である。In addition, if the pressurization time is 15 minutes or less, densification will not occur and 12
Even if the pressure is applied for more than 0 minutes, there is no change and it is useless.
次で、補助パイプ（２）を除去して外層が高強度炭素鋼
、内層が高耐食性高ニッケル合金で形成されたクラッド
管（１）を得る。Next, the auxiliary pipe (2) is removed to obtain a clad pipe (1) whose outer layer is made of high-strength carbon steel and whose inner layer is made of highly corrosion-resistant high nickel alloy.
尚、１１００〜１２００℃、圧力１０００〜２０００ｋ
ｇｆ／ｃボ、６０〜１２０分の加工条件にて最良のクラ
ッド管を形成できた。In addition, 1100-1200℃, pressure 1000-2000k
The best clad pipe could be formed under processing conditions of GF/C and 60 to 120 minutes.
上記の方法で形成したクラッド管（１）を素材として１
０００℃±５０℃の温度雰囲気中で、熱間総型成形加工
にて継手を形成する。Using the clad pipe (1) formed by the above method as a material, 1
The joint is formed by hot molding in a temperature atmosphere of 000°C ± 50°C.
熱間総型成形の手順は、第１図ｃ −ｇと同棟である。The procedure for hot molding is the same as in Fig. 1c-g.
本発明は上記実施例の構成に限定されることな第１図は
本発明の製造手順の説明図、第２図は第１図ａＩＩ−Ｉ
Ｉ線に沿う断面図、第３図はクラッド管の他の実施例の
縦断面図、第４図は第３図■−■線に沿う断面図、第５
図は出願人が以前提案したＴ字管の製造手順の説明図、
第６図は従来例の製造手順の説明図である。The present invention is not limited to the configuration of the above embodiment. Fig. 1 is an explanatory diagram of the manufacturing procedure of the present invention, and Fig. 2 is a diagram of Fig. 1 aII-I.
3 is a longitudinal sectional view of another embodiment of the clad pipe, FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3, and FIG.
The figure is an explanatory diagram of the T-tube manufacturing procedure previously proposed by the applicant.
FIG. 6 is an explanatory diagram of a conventional manufacturing procedure.
（１）・・・クララ ド管 （２）・・・外 管 （３）・・・内 管(1)...Clara do pipe (2)...outside tube (3)...within tube
Claims (1)
軸に沿って所定幅の板材（４）を介装し、これを熱間静
水圧圧縮加工（ＨＩＰ；Ｈｏｔ Ｉｓｏｓｔａｔｉｃ
Ｐｒｅｓｓ）を行なって偏肉のクラッド管（１）を形成
し、該クラッド管（１）を厚肉部（１０）が中央枝管（
７１）となる様に熱間総型成形によりＴ字状に成形し、
中央枝管（７１）の先端を切断し、該枝管の開口及び両
端の開口を成形治具（６）を通して所定の寸法に仕上げ
てクラッドＴ字管を製造する方法。 ［２］外管（２）と、該管に偏心して余裕のある状態に
嵌めた補助管（２０）との間に金属粉末（３０）を充填
し、これを熱間静水圧圧縮加工を行なって偏肉した厚肉
部（１０）を有すクラッド管（１）を形成し、該クラッ
ド管（１）を厚肉部（１０）が中央枝管（７１）となる
様に熱間総型成形によってＴ字状に成形し、中央枝管（
７１）の先端を切断し、該枝管の開口及び両端の開口を
成形治具（６）を通して所定の寸法に仕上げてクラッド
Ｔ字管を製造する方法。[Scope of Claims] [1] A plate material (4) of a predetermined width is interposed between the fitted outer tube (2) and inner tube (3) along the tube axis, and is heated by hot isostatic pressure. Compression processing (HIP; Hot Isostatic
Press) to form a cladding pipe (1) with uneven thickness, and the thick walled part (10) of the cladding pipe (1) forms a central branch pipe (1).
71) is formed into a T-shape by hot molding,
A method of manufacturing a clad T-shaped pipe by cutting the tip of the central branch pipe (71) and finishing the opening of the branch pipe and the openings at both ends to a predetermined size through a forming jig (6). [2] Metal powder (30) is filled between the outer tube (2) and the auxiliary tube (20), which is fitted eccentrically into the tube with ample room, and subjected to hot isostatic compression processing. A clad pipe (1) having a thick wall portion (10) with uneven thickness is formed, and the clad pipe (1) is hot molded so that the thick wall portion (10) becomes a central branch pipe (71). The central branch canal (
71) A method of manufacturing a clad T-shaped pipe by cutting off the tip of the branch pipe and finishing the opening of the branch pipe and the openings at both ends to predetermined dimensions through a forming jig (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129861A JPH0425694A (en) | 1990-05-17 | 1990-05-17 | Manufacture of clad tee-tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129861A JPH0425694A (en) | 1990-05-17 | 1990-05-17 | Manufacture of clad tee-tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0425694A true JPH0425694A (en) | 1992-01-29 |
Family
ID=15020086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2129861A Pending JPH0425694A (en) | 1990-05-17 | 1990-05-17 | Manufacture of clad tee-tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425694A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821887A (en) * | 1994-03-21 | 1996-01-23 | General Electric Co <Ge> | Manufacture of coating pipe |
| US6017064A (en) * | 1998-05-07 | 2000-01-25 | Harrington; Donald W. | Apparatus and methods for forming lateral openings in main pipelines and restraining apparatus for main and lateral pipe joints |
| CN104889581A (en) * | 2015-06-16 | 2015-09-09 | 上海华谊集团装备工程有限公司 | Deformation preventing process for welding dense connecting tubes on thin-wall barrel body |
-
1990
- 1990-05-17 JP JP2129861A patent/JPH0425694A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821887A (en) * | 1994-03-21 | 1996-01-23 | General Electric Co <Ge> | Manufacture of coating pipe |
| US6017064A (en) * | 1998-05-07 | 2000-01-25 | Harrington; Donald W. | Apparatus and methods for forming lateral openings in main pipelines and restraining apparatus for main and lateral pipe joints |
| CN104889581A (en) * | 2015-06-16 | 2015-09-09 | 上海华谊集团装备工程有限公司 | Deformation preventing process for welding dense connecting tubes on thin-wall barrel body |
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