JPS5966982A - Welding method of pipe and pipe plate - Google Patents
Welding method of pipe and pipe plateInfo
- Publication number
- JPS5966982A JPS5966982A JP17659482A JP17659482A JPS5966982A JP S5966982 A JPS5966982 A JP S5966982A JP 17659482 A JP17659482 A JP 17659482A JP 17659482 A JP17659482 A JP 17659482A JP S5966982 A JPS5966982 A JP S5966982A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- pipe
- tube
- welding
- ferritic stainless
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0288—Seam welding; Backing means; Inserts for curved planar seams for welding of tubes to tube plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
スデナイト系ステンレス鋼管板とをオーステナイト系ス
テンレス溶加俸を用いて溶接する方法に係る，１
フェライト系ステンレス鋼管をオーステナイト系ステン
レス鋼管板孔に挿入し管端を管板に溶接固定する場合．
管板孔の管挿入背側に開先全形成した土管端を管板背側
に突出させて，オーステナイト系ステンレス溶ｊＪｌ１
棒を用いて溶接すると，溶加棒の溶融とともに開先部に
突出されたフェライト系ステンレス鋼管が溶融され。[Detailed description of the invention] Relating to a method of welding a sudenitic stainless steel tube sheet using an austenitic stainless steel filler metal, 1. A ferritic stainless steel tube is inserted into an austenitic stainless steel tube sheet hole, and the tube end is attached to the tube sheet. When fixing by welding.
The end of the clay pipe, which has a full groove formed on the back side of the tube insertion hole in the tube sheet hole, is made to protrude to the back side of the tube sheet.
When welding with a rod, the ferritic stainless steel pipe protruding from the groove is melted as the filler rod melts.
溶融金属はフェライト系ステンレス鋼管が多量に溶は込
み，フェライト系ステンレス鋼管の希釈率４０〜６０係
程度のフェライト−オーステナイトの２和合金となり．
その硬さはビッカース硬度で２７０〜３００を示す非常
に硬いものとなる。The molten metal penetrates a large amount of the ferritic stainless steel pipe, and becomes a ferrite-austenite binary alloy with a dilution ratio of about 40 to 60 parts.
Its hardness is extremely hard, with a Vickers hardness of 270 to 300.
なお溶加（Ａとしてインコネル未溶加俸を用いた場合，
溶接金属の硬さはビＩカース硬度１５０〜１８０程度と
低いが高温高圧水素意囲気における水素誘起割れを起す
ことが考えられ．又フェライト未溶加俸を用いた場合に
はビッカース硬さ２７０〜３００の硬度とともに溶接金
属の靭性が低くなる。In addition, if Inconel unmelted filler is used as melt filler (A),
Although the hardness of the weld metal is low, at about 150 to 180 on the Vikers hardness, it is thought that hydrogen-induced cracking may occur in a high-temperature, high-pressure hydrogen atmosphere. Furthermore, when unmelted ferrite is used, the hardness of the weld metal decreases with a Vickers hardness of 270 to 300.
本発明は上記事情に鑑み，フェライト系ステンレス鋼管
とオーステナイト系ステルス鋼管板の溶接テおいて、オ
ーステナイト系ステンレス溶加俸を用いて溶接し溶接金
属の硬度をビッカース硬さ２５０以下にすることを目的
とし。In view of the above-mentioned circumstances, an object of the present invention is to weld a ferritic stainless steel pipe and an austenitic stealth steel pipe sheet using an austenitic stainless steel filler slag to reduce the hardness of the weld metal to Vickers hardness of 250 or less. year.
フェライト系ステンレス鋼管をオーステナイト系ステン
レス鋼管板孔に挿入し溶接するにあたり、管端位置を、
管板孔の管挿入背側に設けた開先の底部とはシ一致させ
、オーステナイト系ステンレス溶加俸を用いて溶接し、
フェライト系ステンレス鋼管の希釈率′ｆ：３ Ｑ係以
下にすることｆｆ：特徴とする管と看板の溶接方法を提
供する。When inserting and welding a ferritic stainless steel pipe into an austenitic stainless steel pipe plate hole, the position of the pipe end should be
Align the bottom of the groove provided on the back side of the tube plate hole with the tube inserted, and weld it using austenitic stainless steel filler.
Dilution factor of ferritic stainless steel pipe 'f: Must be less than 3Q factorff: Provides a method for welding a pipe and a signboard, characterized by:
本発明溶接方法においては、このようにフェライト系ス
テンレス鋼管の希釈率が３０％以下となるので、ビッカ
ース硬さは２５０以下となり、かつ靭性も充分に保つこ
とができる。In the welding method of the present invention, since the dilution rate of the ferritic stainless steel pipe is 30% or less, the Vickers hardness is 250 or less, and sufficient toughness can be maintained.
本発明方法を第１図に示す実施例について説明する。The method of the present invention will be described with reference to the embodiment shown in FIG.
第１図（ａ）は本発明による溶接中、（ｂ）は溶接後の
状況を、それぞれ示す。図において、１はフェライト系
ステンレス鋼管、２はオーステナイト系ステンレス鋼管
板、２′はその管板孔、３は管板孔２′の管挿入背側に
設けられた開先、４はメーステナイト系ステンレス溶加
俸、５はタングステン電極、６はアーク、７は溶接金属
、８は溶接金属中に溶融して希釈されたフェライト系ス
テンレス鋼管の量を示す。FIG. 1(a) shows the situation during welding according to the present invention, and FIG. 1(b) shows the situation after welding. In the figure, 1 is a ferritic stainless steel tube, 2 is an austenitic stainless steel tube sheet, 2' is a hole in the tube sheet, 3 is a groove provided on the back side of the tube sheet hole 2' where the tube is inserted, and 4 is a mastenitic stainless steel tube. 5 is the tungsten electrode, 6 is the arc, 7 is the weld metal, and 8 is the amount of ferritic stainless steel pipe melted and diluted in the weld metal.
このような構成において、先ず管１と管板２の溶接にお
いて溶接部ののと厚を十分確保するために管板２には開
先３が機械加−Ｊ二にて設けられる。そして本発明では
管の希釈率を低くするために管１の先端位置を開先３の
ほぼ底位置に配する。管板２とタングステン電極５の間
に図示しない溶接電源から通電するとアーク６が発生す
る。In such a configuration, first, in welding the tube 1 and the tube sheet 2, a groove 3 is provided in the tube sheet 2 by machining in order to ensure a sufficient thickness of the welded portion. In the present invention, the tip of the tube 1 is placed almost at the bottom of the groove 3 in order to reduce the dilution rate of the tube. When electricity is applied between the tube sheet 2 and the tungsten electrode 5 from a welding power source (not shown), an arc 6 is generated.
この時タングステン電極５の位置が管ＩＫあまりにも近
いと管ｌの希釈が増大するので、溶接が健全に行なえる
範囲内でタングステン電極５は管１からできるだけ遠い
位置が望ましい。At this time, if the tungsten electrode 5 is located too close to the tube IK, the dilution of the tube I will increase, so it is desirable that the tungsten electrode 5 be located as far away from the tube 1 as possible within a range that allows sound welding.
又溶加咋４はアーク６によって溶融されるとともに管１
の表面が溶融して健全な溶融が行なえる範囲内で管１の
溶融をできるだけ少なくするために、管ＩＶｃ近い位置
に配せられる。Further, the melt filler 4 is melted by the arc 6 and the pipe 1
The tube 1 is placed close to the tube IVc in order to minimize melting of the tube 1 within a range where the surface of the tube 1 is melted and healthy melting can be performed.
このようにして溶接された溶接部は健全な溶接電属７が
得られる。ここで溶接金属はオーステナイト系ステンレ
ス溶加棒４およびオーステナイト系ステンレス鋼管板２
の一部およびフェライト系ステンレス鋼管１が溶融、凝
固し９いわゆるオーステナイト＋フェライトの２和合金
となる。ここで本発明においてはフェライト系ステンレ
ス鋼管の溶融希釈を少なくしているためその量ｄ、図示
した希釈量８となり、オーステナイト＋フェライトの２
相合金のうちフェライトのパーセンｌ−ｉｆ ３０％以
下としている。A sound welding metal 7 can be obtained from the welded part thus welded. Here, the weld metal is an austenitic stainless steel filler rod 4 and an austenitic stainless steel tube sheet 2.
A part of the ferritic stainless steel tube 1 is melted and solidified to form a so-called binary alloy of austenite and ferrite. Here, in the present invention, since the melt dilution of the ferritic stainless steel pipe is reduced, the amount d is the dilution amount shown in the figure, which is 2 of the austenite + ferrite.
The percentage l-if of ferrite in the phase alloy is 30% or less.
次にフェライト系ステンレス鋼の希釈率を３０飴以１・
とする理由を第２図について説明する。Next, the dilution rate of ferritic stainless steel is 30% or more.
The reason for this will be explained with reference to FIG.
第２図はフェライト系ステンレス鋼（ＡＳＴＭＡ２ｓｓ
ＸＪＶＩ２７’）Ｋオーステナイト未溶加俸（ＡＷＳ、
ＥＲａｏ９Ｌ）を用いて溶接しフェライト系ステンレス
鋼の希釈を種々変化させた場合の溶接金属の硬度測定結
果である。Figure 2 shows ferritic stainless steel (ASTMA2ss
XJVI27') K austenite unmelted addition (AWS,
These are the hardness measurement results of weld metal when welding was performed using ERao9L) and the dilution of ferritic stainless steel was varied.
完全なフェライト（この場合は溶加棒を送らずフェライ
ト系ステンレス鋼！ｚＴＩＧでなめづけした）および完
全なオーステナイト（この場合は３０４Ｌオーステナイ
トステンレス鋼板にオーステナイト未溶加俸を用いて溶
接・・・・・なお厳密にはこの溶接部には数条のフェラ
イトが含有されるがフェライト系ステンレス鋼の希釈を
論するためにここではオーステナイトｔｏｏ％とした）
の状態では、硬さは両者とも低いが。Completely ferritic (in this case, ferritic stainless steel without sending a filler rod! zTIG tanned) and completely austenite (in this case, 304L austenitic stainless steel plate is welded using an austenite-free filler)...・Strictly speaking, this welded part contains several ferrite strips, but in order to discuss the dilution of ferritic stainless steel, it is assumed to be too% austenite here.)
In this state, the hardness of both is low.
オーステナイト＋フェライトの２相合金になると硬さが
高くなり、フェライト５０〜６０係でビッカース硬さ２
７０〜３００程度となる。When it becomes a two-phase alloy of austenite and ferrite, the hardness increases, and the Vickers hardness is 2 with ferrite of 50 to 60.
It will be about 70 to 300.
なお硬さを低くするためにはフェライト系ステンレスの
希釈を少なくするかあるい（は非′帛に多くするか両者
の方法があるが、フェライトの希釈を多くするとＮ、Ｃ
，の含有によっては溶接部の靭・：生が劣トーするので
、ビッカース硬さを２５０以下にし、かつ溶接部に十分
な靭性を持たせるために、フェライト系ステ／レス鋼の
希釈を３（）係以１・にする必要がある。In order to lower the hardness, there are two methods: to reduce the dilution of the ferritic stainless steel, or to increase it unnecessarily.
, the toughness of the welded part becomes inferior depending on the content of ) It is necessary to make it 1.
見、１・゛に本発明方法の具体的実施例について述べる
。In Section 1.1, specific examples of the method of the present invention will be described.
第３図に示す開先形状で次の溶接条件で溶接したつ
すなわち管はＡＳＴＭＡ２６８ＸＭ２７制で、外径２５
４ψ、板ｊワ１６胴とし、管板は５ＴＪＳ３０４Ｌ拐と
し、溶接ワイヤは１層目３０９１．．２層目３０８Ｌの
０．８ ｍｍ Ｔ Ｉ Ｇ用ワイヤとし、溶接ワイヤを
管と管板の境界部１ｃ配し、又タングステン電極は開先
端部直し１脳の所に配し、１層目１＋ｌＯＡ、２層目１
１５Ａで自動溶接した。The pipe welded with the groove shape shown in Figure 3 under the following welding conditions is ASTMA268XM27 standard and has an outer diameter of 25.
4ψ, plate length 16, tube plate 5TJS304L, welding wire for the first layer 3091. ．． The second layer was a 308L 0.8 mm T I G wire, the welding wire was placed at the boundary between the tube and the tube plate 1c, and the tungsten electrode was placed at the open end repair 1 brain, and the first layer was 1+1OA. , 2nd layer 1
Automatic welding was performed at 15A.
溶接後の断面マクロ検査によりＸＭ２７Ｗの溶接金属へ
の希釈は約２０％であることが判り。A cross-sectional macro inspection after welding revealed that the dilution of XM27W into the weld metal was approximately 20%.
硬さもビッカース硬度２３０程度であった。又溶接のと
厚は約２ｍであった。The hardness was also about 230 on Vickers hardness. The thickness of the weld was approximately 2 m.
第１図は本発明方法の一実施例の要領図、第２図は本発
明方法におけるフェライト系ステンレス鋼の希釈イ１（
ｉ−説明する図表、第３図は本発明方法の実験例の開先
説明図である。
１：フェライト系ステンレス鋼管、２ニオ−ステナイト
系ステンレス鋼管板、２′：管板孔。
３：開先、４ニオ−ステナイト系ステンレス溶加俸、７
：溶接金属１、
第１図
Ｃ（１）
小ノ
第２区
フェライト糸ステンレス矧尚の４牙に牟％第３閏Fig. 1 is a schematic diagram of one embodiment of the method of the present invention, and Fig. 2 is a diagram showing dilution step 1 of ferritic stainless steel in the method of the present invention.
Figure 3 is an explanatory diagram of a bevel in an experimental example of the method of the present invention. 1: Ferritic stainless steel tube, 2: Niostenitic stainless steel tube sheet, 2': tube sheet hole. 3: Bevel, 4 Niostenitic stainless steel filler, 7
: Weld metal 1, Figure 1 C (1) Small second section ferrite thread stainless steel
Claims (1)
ス鋼管板孔に挿入し溶接するにあたり、管端位置を、管
板孔の管挿入背側に設けた開先の底部とはソ一致させ、
オーステナイト系ステンレス醍加俸を用いて溶接し、フ
ェライト系ステンレス鋼管の希釈率を３０％以］にする
ことを特徴とする管と管板の溶接方法。When inserting and welding a ferritic stainless steel pipe into an austenitic Sderus steel pipe plate hole, the tube end position should be aligned with the bottom of the groove provided on the back side of the tube plate hole where the pipe is inserted.
A method for welding a tube and a tube sheet, characterized in that the welding is performed using austenitic stainless steel and the dilution ratio of the ferritic stainless steel tube is 30% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17659482A JPS5966982A (en) | 1982-10-07 | 1982-10-07 | Welding method of pipe and pipe plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17659482A JPS5966982A (en) | 1982-10-07 | 1982-10-07 | Welding method of pipe and pipe plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5966982A true JPS5966982A (en) | 1984-04-16 |
| JPS6353909B2 JPS6353909B2 (en) | 1988-10-26 |
Family
ID=16016295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17659482A Granted JPS5966982A (en) | 1982-10-07 | 1982-10-07 | Welding method of pipe and pipe plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966982A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4526096B1 (en) * | 2009-12-08 | 2010-08-18 | 有限会社奥戸溶接 | Fire extinguisher |
| CN111390339A (en) * | 2020-04-04 | 2020-07-10 | 天津津滨石化设备有限公司 | Welding process of high-purity ferrite stainless steel heat exchanger |
-
1982
- 1982-10-07 JP JP17659482A patent/JPS5966982A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4526096B1 (en) * | 2009-12-08 | 2010-08-18 | 有限会社奥戸溶接 | Fire extinguisher |
| JP2011120620A (en) * | 2009-12-08 | 2011-06-23 | Okuto Yosetsu:Kk | Fire extinguisher |
| CN111390339A (en) * | 2020-04-04 | 2020-07-10 | 天津津滨石化设备有限公司 | Welding process of high-purity ferrite stainless steel heat exchanger |
| CN111390339B (en) * | 2020-04-04 | 2021-10-29 | 天津津滨石化设备有限公司 | Welding process of high-purity ferrite stainless steel heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353909B2 (en) | 1988-10-26 |
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