JPS61123486A - Manufacture of double layer clad round bar - Google Patents

Manufacture of double layer clad round bar

Info

Publication number
JPS61123486A
JPS61123486A JP24451484A JP24451484A JPS61123486A JP S61123486 A JPS61123486 A JP S61123486A JP 24451484 A JP24451484 A JP 24451484A JP 24451484 A JP24451484 A JP 24451484A JP S61123486 A JPS61123486 A JP S61123486A
Authority
JP
Japan
Prior art keywords
round bar
pipe
steel
thermal expansion
working
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
Application number
JP24451484A
Other languages
Japanese (ja)
Inventor
Akio Dewa
出羽 昭夫
Takashi Kimura
隆 木村
Yasuhiro Fukaya
深谷 保博
Shozo Hirai
章三 平井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP24451484A priority Critical patent/JPS61123486A/en
Publication of JPS61123486A publication Critical patent/JPS61123486A/en
Pending legal-status Critical Current

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  • Pressure Welding/Diffusion-Bonding (AREA)
  • Laminated Bodies (AREA)

Abstract

PURPOSE:To obtain a good clad round bar by brining a tubular shell whose thermal expansion coefficient is smaller than that of a round bar, to an open- working to a vertical split, covering the round bar with it, welding the open- working part, and thereafter, heating it, and executing a diffused junction by utilizing the difference of a thermal expansion of both members. CONSTITUTION:A Zr pipe 1 and a round bar 2 of steel having a high alpha value are worked to a size by which a diffusing junction can be executed. Subsequently, a vertical opening part 4 is provided by bringing the Zr pipe 1 to a groove working, the round bar 2 is covered with said pipe, and the vertical opening part forms a vertical weld zone by using a welding material Zr. Thereafter, this assembly material is brought to a diffused junction processing and a double layer clad steel round bar is formed. Accordingly, according to this method, since the round bar is not inserted into the Zr pipe, its installation is executed easily, and even in case of that having a large diameter and a long size, it can be prepared easily. In this regard, this method can be applied to other pipe of a material having a low alpha value than a pure Zr pipe.

Description

【発明の詳細な説明】 (産業上の利用分野〕 本発明は二層クラッド丸棒を製造する方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a double-clad round bar.

(従来の技術〕 ジルコニウムチタン及びこれらの合金(以下Zrと記す
〕は耐食性及び耐熱性が優れているために化学容器原子
炉用材料として多用されているが、高価なため必要部分
(接液部)のみにZrを使用し、他の部分は安価な材料
を使用することが要求されている。この要求に対応する
ものとして板の場合は爆着又は拡散接合等のzrクラッ
ド鋼が開発され実用化されているが、ロール又は軸等丸
棒への適用は一般的ではない。
(Prior Art) Zirconium titanium and their alloys (hereinafter referred to as Zr) are widely used as materials for chemical vessels and nuclear reactors due to their excellent corrosion resistance and heat resistance. ), and other parts are required to use inexpensive materials.In order to meet this requirement, for plates, ZR clad steel using explosion bonding or diffusion bonding has been developed and is now in practical use. However, it is not commonly applied to round bars such as rolls or shafts.

本発明者らはZr’WK鋼の丸棒を挿入して麿熱し、両
材質の熱膨脹係数(以下αと記す)差を利用した拡散接
合クラッド鋼管本発明と同日付で特許出願し【いるがZ
r及び鋼のa値の関係上加熱前の両者の間隙(Zr管の
内径と丸棒の外径の差]大きさに制限があるという欠点
がある。
The present inventors inserted a round bar of Zr'WK steel and heated it, and filed a patent application on the same date as the present invention for a diffusion bonded clad steel pipe that utilizes the difference in coefficient of thermal expansion (hereinafter referred to as α) between the two materials. Z
There is a drawback that there is a limit to the size of the gap (difference between the inner diameter of the Zr tube and the outer diameter of the round bar) between the two before heating due to the relationship between r and the a value of the steel.

即ち挿入丸棒に炭素鋼又は低合金鋼を用いた場合、Zr
とのa値の差は余り大き、くない友め加熱前の間隙は小
さくする必要がある(例えば、80φの丸棒でQ、ll
Bの間隙) Zrと炭素鋼の拡散接合性は余り良くない
ため、両者の間に金属間化合物を生じないようなTi、
 Mn、 Ni又はこれらの組合せた箔又はコーティン
グを設置する必要がおるため画材の間隙が小さいとZr
管に鋼材丸棒を挿入時、作業性が極めて悪い。一方、挿
入丸棒にオーステナイト系ステンレス鋼を用いた場合、
zrとのα値の差は大きいため、加熱前の間隙も大きく
とれ、(例えば80φで丸棒で0゜2賜の間隙]挿入も
容易であるが、接合後の冷却過程で大きな収縮応力を生
じるため、接合部にクラックが発生し、良好なりラッド
丸棒を得ることは困礫である。
That is, when carbon steel or low alloy steel is used for the inserted round bar, Zr
The difference in a value between the
gap between B) Since the diffusion bonding properties between Zr and carbon steel are not very good, it is necessary to use Ti, which does not cause intermetallic compounds between them.
Since it is necessary to install Mn, Ni or a combination of these foils or coatings, if the gap between the art materials is small, Zr
Workability is extremely poor when inserting a steel round bar into a pipe. On the other hand, when austenitic stainless steel is used for the inserted round rod,
Since the difference in α value with zr is large, the gap before heating can be made large and it is easy to insert (for example, a 0°2 gap with an 80φ round bar), but a large shrinkage stress is generated during the cooling process after joining. As a result, cracks occur at the joint, making it difficult to obtain a good rad round bar.

(発明が解決しようとする問題点) Zクラッド鋼製ロール又は輪金拡散接合で製作するにあ
たり、加熱前のZr 管と芯材を容易に装着でき、しか
も接合強度の高いクラッド丸棒を製作する方法を提供し
ようとするものである。
(Problems to be Solved by the Invention) To manufacture a clad round bar that can be easily attached to an unheated Zr tube and a core material and has high bonding strength when manufactured by Z-clad steel roll or ring metal diffusion bonding. It is intended to provide a method.

(問題点を解決するための手段〕 すなわち、本発明は接合すべき丸棒と丸棒よりも熱膨脹
係数の小さい管状外殼を拡散接合可能な寸法に卯工した
後、管状外殼を一つ以上に縦割りし開1工し、該開Wし
た外殼を丸棒にかぶせて開茄工sf:長手溶接し、該組
立材を両部材の熱膨脹差を利用して拡散接合することt
−特徴とする二層クラッド丸棒の製造方法である。
(Means for Solving the Problems) That is, the present invention involves preparing round bars to be joined and tubular shells having a smaller coefficient of thermal expansion than the round bars to dimensions that allow diffusion bonding, and then forming one or more tubular shells. Split vertically and open, place the opened outer shell over a round bar, and open the shell SF: Longitudinal welding, and the assembled materials are diffusion bonded using the difference in thermal expansion between the two members.
- A method for manufacturing a double-layer clad round bar.

本発明は、化学反応器の攪拌軸、ロールの製作に有利に
適用することができる。
The present invention can be advantageously applied to manufacturing stirring shafts and rolls for chemical reactors.

以下、添付図に従って本発明を詳述する。Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

第1図12図は本発明の一実施態様の手順の説明図、第
3図は本発明の他の実施態様の説明図、第4図は第5図
のI−1断面図で、その(Al t (BI −(cl
は各々別の実施態様を示す。第5図は本発明と同日付特
許願で提案した実施態様の説明図である。
FIG. 1 and FIG. 12 are explanatory diagrams of the procedure of one embodiment of the present invention, FIG. 3 is an explanatory diagram of another embodiment of the present invention, and FIG. 4 is a sectional view taken along line I-1 in FIG. Al t (BI-(cl
each represents a different embodiment. FIG. 5 is an explanatory diagram of an embodiment proposed in a patent application dated the same date as the present invention.

図において、1はZr12はzrに比べて安価、高強度
、高α値を有する鋼材、3は接合強度を上げるためのイ
ンサート材で、Ti、 MO,Ni  又はこれらの組
合せた箔、又はメッキ、溶射等のコーチ、インクにより
Zr 1又は鋼材2の表面に設けられた被覆である。4
は縦開口部、5は縦溶接部、6は溝、7はZr板を示す
In the figure, 1 is Zr12, which is a steel material that is cheaper, has higher strength, and has a higher α value than Zr, and 3 is an insert material to increase the joint strength, and is made of Ti, MO, Ni, or a combination of these foils or plating. This is a coating provided on the surface of Zr 1 or steel material 2 using a coat or ink such as thermal spraying. 4
5 indicates a vertical opening, 5 indicates a vertical welded portion, 6 indicates a groove, and 7 indicates a Zr plate.

同日付で提案した手段は、第5図に示すようにZr管1
に高α値の鋼の丸棒2を挿入し、これを拡散溶接して二
層クラツド鋼にするものであるが、このような手段であ
ると前述したような問題点があった。
The means proposed on the same date was the Zr tube 1 as shown in Figure 5.
A round bar 2 of steel with a high alpha value is inserted into the steel plate, and this is diffusion welded to form a double-layer clad steel, but this method has the problems described above.

これに対し、本発明の一実施態様においては、先ずZr
管1と高α値の鋼の丸棒2を拡散接合可能な寸法に那工
し、第1図に示すようにZr管1に開先加工して縦開ロ
部4t−設ける。次いで縦開口部4を設けたzr管1を
高α値の鋼の丸棒2に覆い第2図に示すように縦開口部
4金溶接材Zr II:使用し、MIG溶接などの溶接
手段で溶接し、縦溶接部4を形成させる。その後、この
組立材を拡散接合処理して二層クラツド鋼丸棒にする。
In contrast, in one embodiment of the present invention, Zr
A tube 1 and a round bar 2 made of high alpha value steel are machined to dimensions that allow diffusion bonding, and a bevel is formed on the Zr tube 1 to provide a vertical opening 4t, as shown in FIG. Next, the ZR tube 1 with the vertical opening 4 is covered with a round bar 2 made of steel with a high α value, and as shown in FIG. Welding is performed to form a vertical weld portion 4. Thereafter, this assembled material is processed by diffusion bonding to form a double-layer clad steel round bar.

第5図は本発明の他の実施態様の一部を示し、…1記実
施態様では開先加工を一個所であったが、この実施態様
においては開先茄工t−2個所行い、離開ロ部4t−2
個所設けたものである。その後の手段は前記実施態様と
同様である。
FIG. 5 shows a part of another embodiment of the present invention. In the first embodiment, the beveling process was performed at one place, but in this embodiment, the beveling process was performed at t-2 places, and the separation process was performed at t-2 places. Lo part 4t-2
This is a separate location. The subsequent steps are the same as in the embodiment described above.

第4図は、第5図の1’−1線矢視図であるが、別々の
実施態様を示す。第4図(AJは第5図の実施態様その
ものであるが、第4図(83は第3図の実施態様を行う
際、zr管のM1捌口部4に接する高α値の鋼の丸棒の
表面と溝6を設けた場合を示す。これは溶接待裏波が十
分にできるようにするためである。
FIG. 4 is a view taken along the line 1'-1 in FIG. 5, but shows a different embodiment. Fig. 4 (AJ is the embodiment shown in Fig. 5 itself, and Fig. 4 (83) is a high α value steel circle in contact with the M1 opening part 4 of the ZR pipe when carrying out the embodiment shown in Fig. 3. A case is shown in which grooves 6 are provided on the surface of the rod.This is to ensure that sufficient welding waves are formed.

第4図(Cilは、第4図(Blの溝6の中に更にZr
板7を嵌合せたものである。これはZr管1が薄肉で、
NLP圧が付茄され゛るロール等では、溝(空洞〕が存
在するとその部で変形する場合がおり、また溶接ルート
部にノツチが存在するため繰返し応力が作用する時クラ
ックが発生する難点を防止するためでおる。
FIG. 4 (Cil is further filled with Zr in the groove 6 of FIG. 4 (Bl).
The plate 7 is fitted. This is because the Zr tube 1 is thin-walled.
If there are grooves (cavities) in rolls, etc. that are subjected to increased NLP pressure, they may deform in those areas, and since there are notches in the weld root, cracks may occur when repeated stress is applied. This is to prevent this.

拡散接合は真空中又は不活性ガス中において材料を融点
以下の温度に加熱し、適当な応力を亦えて接合する方法
でめり、固相接合の一部である。本発明ではこの応力負
荷を外力を用いることなく、画材質問のα差による熱応
力を利用したものである。即ち接合温度域のZrのαは
炭素鋼のイ以下、オーステナイトステンレス鋼の約14
で69、αの小さい外殼のZrに、αの大きい丸棒鋼全
装着して加熱することによって鋼材はZr f押し拡げ
ようとするためZr−鋼の境界面には接合に十分な応力
が作用する。この応力の大きさは接合強度に影響し、当
然両材質のα値間隙の大きさ加熱温度に影響する。
Diffusion bonding is a method of heating materials to a temperature below their melting point in a vacuum or an inert gas, applying appropriate stress, and bonding, and is a part of solid-state bonding. In the present invention, this stress load does not use an external force, but utilizes thermal stress due to the α difference between the art materials. That is, the α of Zr in the welding temperature range is less than A for carbon steel, and about 14 for austenitic stainless steel.
69, by attaching all the round steel bars with a large α to the Zr shell with a small α and heating the steel material, the Zr f will try to expand, so sufficient stress will act on the Zr-steel interface for bonding. . The magnitude of this stress affects the bonding strength, and naturally affects the size of the α-value gap between the two materials and the heating temperature.

本発明は、このZrの外層と鋼の内芯の組立て全従来の
ようなZr管に丸棒を挿入する方法でなく前述のような
手順にすることにより、外層及び内芯の間隙が小さい場
合であっても装着が簡単であり、大径、長尺ものでも容
易に製作が可能である。尚、 Zrと炭素鋼の溶融溶接
はボンド部に脆弱な金属間化合物を形成し、その結果ク
ラックが発生することがある。従って第4図(A)′に
示すような場合、母材部(丸棒)tl−溶かさないよう
に未溶は退部を残した状態にする必璧があり、Zr管の
薄肉のものには適当でない。第4図(81に示す手段は
前述したようにZrの裏波を十分量さすように空間(#
〕ヲ設け、それによりクラックの全生金防止したもので
ある。又第4図tc+この空間部にZr片t−はめ込ん
でZr殻の溶接を完全に施工したもので、この場合その
後の加熱に工り鋼とZr片及びZr管とZr片も拡散接
合されるため完全な一体クラッド丸棒が得られる。一方
このような溶接構造の場合溶着金属の収縮変形により、
両部相間の刀工精度に起因する間隙はなくなる。むしろ
殻は丸棒を絞め付けた状態となりその後の拡散接合に対
して有利である。
The present invention is capable of assembling the Zr outer layer and the steel inner core by using the procedure described above instead of the conventional method of inserting a round rod into the Zr tube. However, it is easy to install, and even large-diameter and long-length products can be manufactured easily. It should be noted that fusion welding of Zr and carbon steel forms a brittle intermetallic compound at the bond, which may result in cracks. Therefore, in the case shown in Fig. 4 (A)', it is necessary to leave the undissolved part in a state where the undissolved part is left in order to prevent the base material (round bar) tl from melting, and when using a thin-walled Zr tube, is not appropriate. As mentioned above, the means shown in FIG.
] was installed, thereby completely preventing cracks from occurring. In addition, the Zr shell is completely welded by fitting the Zr piece t into this space in Figure 4 (tc+), and in this case, the processed steel and the Zr piece, as well as the Zr pipe and the Zr piece, are also diffusion bonded during subsequent heating. Therefore, a completely integrally clad round bar is obtained. On the other hand, in such a welded structure, shrinkage and deformation of the welded metal causes
The gap caused by the precision of the swordsmith between the two parts disappears. Rather, the shell becomes in a state where the round rod is squeezed, which is advantageous for subsequent diffusion bonding.

実施例 炭素鋼(334179゜6φ)に厚さ0.05鵬のN1
、厚さ0.05鵡のMo、厚さo、1iasのτ1のi
r順次巻き、純Zr管(ASJg 3B−551゜R6
0702:外径100.0φ、内径80.0φ)を二つ
割りしたものをかぶせ、ガスシールトドf (2Q 1
3 / win )、2■φのZr@i−使用し100
 mlI/ Winの速度でMiG 溶接したものを5
X I Q−’ トールの真空中で780℃〜870℃
の範囲で2時間加熱し拡散接合を行った。その結果、z
r−炭素鋼間で2〜5 kg / us2の引抜き強度
が得られ、ミクロ組織観察でも欠陥のない良好な接合体
が得られることが判明した。尚Zr管に炭素鋼丸棒を挿
入する従来の方法の場合、CZr+インサート材〕と丸
棒の接合可能な辺熱前の間隙は0.1鵡以下であり丸棒
の挿入は極めて困難であったのに対し、本発明の方式で
は間隙に関係なくスムーズに装着できた。
Example Carbon steel (334179゜6φ) with a thickness of 0.05mm N1
, Mo with thickness 0.05, thickness o, i with τ1 of 1ias
r sequential winding, pure Zr tube (ASJg 3B-551°R6
0702: Outer diameter 100.0φ, inner diameter 80.0φ), cut in half, and cover with gas shield f (2Q 1
3/win), 2■φ Zr@i-Use 100
MiG welded at the speed of mlI/Win 5
X I Q-' 780℃~870℃ in Torr vacuum
Diffusion bonding was performed by heating in the range of 2 hours. As a result, z
It was found that a pull-out strength of 2 to 5 kg/us2 was obtained between r-carbon steels, and a good bonded body with no defects was obtained even by microstructural observation. In the case of the conventional method of inserting a carbon steel round bar into a Zr tube, the gap between the CZr + insert material and the round bar before side heating is less than 0.1 mm, making it extremely difficult to insert the round bar. On the other hand, the method of the present invention allowed for smooth installation regardless of the gap.

以上、本発明につ@zrを代表として説明したが、純Z
r管以外に、Zr合金、タンタル、メンタル合金、チタ
ン、チタン合金のように低α値の材料の管についても同
様に適用しうるものである。
The present invention has been explained above using @zr as a representative, but pure Z
In addition to r-tubes, the present invention can be similarly applied to tubes made of materials with low α values such as Zr alloy, tantalum, mental alloy, titanium, and titanium alloy.

【図面の簡単な説明】[Brief explanation of drawings]

第1図、第2図は本発明の一実施態様の手順の説明図、
第3図は本発明の他の実施態様の説明図、第4図は第3
図の1−1断面図で、その(Al 、 (Bl ? (
C1は各々別の実施態様を示す。第5図は本発明と同日
付特許出願で提案した実施態様の説明図である。 復代理人  内 1)  明 復代理人  萩 原 亮 −
FIG. 1 and FIG. 2 are explanatory diagrams of the procedure of one embodiment of the present invention,
FIG. 3 is an explanatory diagram of another embodiment of the present invention, and FIG. 4 is an explanatory diagram of another embodiment of the present invention.
In the 1-1 cross-sectional view of the figure, its (Al, (Bl?
C1 each represents a different embodiment. FIG. 5 is an explanatory diagram of an embodiment proposed in a patent application filed on the same date as the present invention. Sub-agents 1) Meifuku agent Ryo Hagiwara -

Claims (1)

【特許請求の範囲】[Claims] 接合すべき丸棒と丸棒よりも熱膨脹係数の小さい管状外
殼を拡散接合可能な寸法に加工した後、管状外殼を一つ
以上に縦割りし開加工し、該開加した外殼を丸棒にかぶ
せて開加工部を長手溶接し、該組立材を両部材の熱膨脹
差を利用して拡散接合することを特徴とする二層クラッ
ド丸棒の製造方法。
After processing the round bar to be joined and a tubular outer shell having a coefficient of thermal expansion smaller than that of the round bar into dimensions that allow diffusion bonding, the tubular outer shell is vertically divided into one or more pieces and opened, and the opened outer shell is made into a round bar. 1. A method for manufacturing a double-layer clad round bar, which comprises longitudinally welding the opened parts over each other, and then diffusion-bonding the assembled materials by utilizing the difference in thermal expansion between the two members.
JP24451484A 1984-11-21 1984-11-21 Manufacture of double layer clad round bar Pending JPS61123486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24451484A JPS61123486A (en) 1984-11-21 1984-11-21 Manufacture of double layer clad round bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24451484A JPS61123486A (en) 1984-11-21 1984-11-21 Manufacture of double layer clad round bar

Publications (1)

Publication Number Publication Date
JPS61123486A true JPS61123486A (en) 1986-06-11

Family

ID=17119808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24451484A Pending JPS61123486A (en) 1984-11-21 1984-11-21 Manufacture of double layer clad round bar

Country Status (1)

Country Link
JP (1) JPS61123486A (en)

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