JPS60133975A - Build-up welding method - Google Patents
Build-up welding methodInfo
- Publication number
- JPS60133975A JPS60133975A JP24337083A JP24337083A JPS60133975A JP S60133975 A JPS60133975 A JP S60133975A JP 24337083 A JP24337083 A JP 24337083A JP 24337083 A JP24337083 A JP 24337083A JP S60133975 A JPS60133975 A JP S60133975A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- steel
- base metal
- build
- carbon
- 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
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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、炭素鋼あるいは低合金鋼によって形成された
母材に、不銹鋼等の耐腐□食性材料を積J−するように
した肉盛り溶接方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 build-up in which a base material made of carbon steel or low-alloy steel is coated with a corrosion-resistant material such as stainless steel. This relates to a welding method.
「従来技術」
一般に、腐食性物質の貯貿や輸送に用いられる縦素鋼(
低合金鋼)によって形成された容器や配管の内面、また
、炭素鋼(低合金鋼)管や板に不銹鋼管や板を溶接する
際の縦素鋼(低合金鋼)管や板の溶接面に、すなわち、
異材継手となる部分の炭素鋼あるいは低合金鋼側1c不
銹鋼あるいはそれ化近似す葛金属からなる耐腐食性材料
を肉盛り溶接することが実施されている。``Prior art'' Generally, vertical steel (
The inner surface of containers and piping made of carbon steel (low-alloy steel), and the welding surface of vertical plain steel (low-alloy steel) pipes and plates when welding stainless steel pipes and plates to carbon steel (low-alloy steel) pipes and plates. In other words,
Build-up welding of a corrosion-resistant material made of carbon steel or low-alloy steel side 1c of non-stainless steel or kudzu metal that approximates it is carried out on the part that will become a dissimilar metal joint.
ところで、前記炭素鋼(低合金鋼)に不銹鋼を肉盛り溶
接する場合、特に両者の炭素含有率が大きく異なること
等に起因して、次のようなM固点が生じる。By the way, when non-ferrous steel is build-up welded to the carbon steel (low alloy steel), the following M solid point occurs, especially due to the large difference in carbon content between the two.
すなわち、例えば炭素鋼と不銹鋼とを溶接する際の炭素
鋼の溶接面に、不銹鋼あるいはそれに近似する金属から
なる溶加材を肉盛り溶接する場合について説明すれば、
第1図に示すように、炭素鋼1の溶接面に溶加材2を複
数パスによって溶接して肉盛り層3を形成すると、同図
中に矢印で示すように、炭素ml内の炭素が溶加材2内
へ析出して、炭素鋼1に希釈眼識を生じさせる。That is, for example, when welding carbon steel and rustless steel, we will explain the case where welding a filler metal made of stainless steel or a metal similar to it to the welding surface of carbon steel.
As shown in Fig. 1, when a build-up layer 3 is formed by welding the filler metal 2 to the welding surface of the carbon steel 1 in multiple passes, the carbon in the carbon ml increases as shown by the arrow in the figure. It precipitates into the filler metal 2 and causes dilution in the carbon steel 1.
このような希釈現象が生じると、前記不銹鋼等からなる
溶加材の耐腐食性が悪化し、また、炭素鋼1の機械的強
度を低下させやすく、さらに、第1図の@縄で示すよう
に、炭素鋼1ζこ不銹鋼4を溶接する際に、その溶接熱
によって、炭素鋼1と肉盛)fjj3との間に熱伸縮差
が生じて、両者間の境界面、特に、肉盛り層3の端部(
第1図中の上下端部)に高応力が発生して、割れを誘発
するおそれがある。When such a dilution phenomenon occurs, the corrosion resistance of the filler metal made of stainless steel or the like deteriorates, and the mechanical strength of the carbon steel 1 tends to decrease. In addition, when welding the carbon steel 1ζ and the stainless steel 4, the welding heat causes a difference in thermal expansion and contraction between the carbon steel 1 and the build-up layer 3, and the interface between them, especially the build-up layer 3. The end of (
There is a risk that high stress will occur at the upper and lower ends (in Fig. 1), inducing cracks.
[@明の目的]
本発明は前述した従来技術の諸事情に鑑みてなされたも
ので、炭素鋼あ颯いは低合金鋼からなる母材に不銹鋼等
の耐腐食性材料を積層する際に、両者間の境界部等にお
ける強度低下を防止するととも化割れの発生を抑えるよ
うにした肉盛り溶接方法の提供を目的とする。[@Akira's purpose] The present invention has been made in view of the circumstances of the prior art described above, and is a method for laminating a corrosion-resistant material such as stainless steel on a base material made of carbon steel or low alloy steel. The object of the present invention is to provide a build-up welding method that prevents a decrease in strength at the boundary between the two and suppresses the occurrence of cracking.
[発明の構成」
本発明は、炭素鋼あるいは低合金鋼等によって形成され
た母材に、不銹鋼等の耐腐食性材料を複数パスによって
溶接ビードを相互に一部重畳させながら溶接して肉盛り
層を形成するとともに、前段の溶接ビード下に生じる母
材の希釈部を後段の溶接ビードの形成時に順次除去し、
最初のパスあるいは最終のパスの何れか一方のパスによ
って形成された溶接ビードに沿って、該溶接ビード下に
残存する母材の希釈部を除去するために高ニッケル合金
からなる溶加材で溶接することにより、母材の肉盛り部
に生じる希釈部のほとんどを除去することを特徴とする
。[Structure of the Invention] The present invention involves welding a corrosion-resistant material such as non-staining steel to a base material made of carbon steel or low alloy steel using multiple passes with the weld beads partially overlapping each other. At the same time as forming a layer, the diluted part of the base metal that occurs under the weld bead in the previous stage is sequentially removed when forming the weld bead in the latter stage,
Weld along the weld bead formed by either the first pass or the last pass with a filler metal consisting of a high nickel alloy to remove the diluted portion of the base metal remaining below the weld bead. By doing so, most of the diluted portion that occurs in the built-up portion of the base material is removed.
「実施例」
以下、本発明に係わる肉盛り溶接方法を^種金属間の突
き合わせ溶接で、前記異種金属が炭素鋼または低合金鋼
と不銹鋼である場合の炭素鋼または低合金−の突き合わ
せ面に適用した例について、第2図に基づき説明する。"Example" Hereinafter, the overlay welding method according to the present invention will be applied to butt welding between different metals, and when the dissimilar metals are carbon steel or low alloy steel and stainless steel, the butt welding method is applied to the butt surface of carbon steel or low alloy steel. An applied example will be explained based on FIG. 2.
本実施例に示す肉盛り溶接方法は、まず、第2図(a)
に示すように、炭素鋼からなる母材11の突真合わせ面
ζこ、不銹鋼等の耐腐食性材料からなる溶加材を複数パ
スの溶接ビー)/12を相互に一部重畳させて(本実施
例では各溶接ビード12の幅のほぼ半分重畳させて)順
次溶接して、母材11の突き合わせ面に肉盛り層13を
形成する。該肉盛り層13を形成する際に、前段の溶接
ビード12によって生じさすられる母#11の希釈部を
後段の溶接ビード12によってほぼ半分づつ順次除去し
て、第2図(a)に鎖線で示すように、*初のパスの浴
接ビード12aおよび最後のパスの溶接ビード12b下
(すなわち、母材11の突き合わせ面の両縁部で第2図
(a)の上下方向の縁部)に、希釈部14a・14bを
残存さ竺た状態とする。The overlay welding method shown in this example is first shown in Fig. 2(a).
As shown in FIG. 1, the welding bead (12) made of multiple passes of the welding bead (12) made of a corrosion-resistant material such as stainless steel is applied to the mating face (ζ) of the base material 11 made of carbon steel, with the welding beads (12) partially overlapping each other ( In this embodiment, the build-up layer 13 is formed on the abutting surface of the base material 11 by sequentially welding the weld beads 12 so as to overlap each other by approximately half the width of each weld bead 12. When forming the build-up layer 13, the diluted portion of the base #11 caused by the weld bead 12 in the previous stage is sequentially removed approximately half by half by the weld bead 12 in the latter stage, as shown by the chain line in FIG. 2(a). As shown, * below the bath welding bead 12a of the first pass and the welding bead 12b of the last pass (i.e., at both edges of the abutting surfaces of the base metal 11, at the edges in the vertical direction in FIG. 2(a)). , the dilution parts 14a and 14b remain in a closed state.
次いで、82図(b)に示すように、前Iid溶接ビー
ド12a・12b上に、高ニッケル合金からなる溶加材
をその溶接ビード15a・15bが前記溶接ビード12
m・12bにそれぞれ一部重畳するように(本実施−で
は溶接ビード12a−12bの幅のほぼ半分重畳するよ
うに)溶接する。該萬ニッケル合金からなる溶加材の溶
接によって、母材11の突き合わせ面の両縁部に残存す
る希釈部14a・14bを除去して本実施例の肉盛りポ
接を完了する。Next, as shown in FIG. 82(b), a filler metal made of high nickel alloy is applied onto the previous Iid weld beads 12a and 12b so that the weld beads 15a and 15b form the weld beads 12a and 12b.
Welding is performed so that the weld beads 12a and 12b partially overlap each other (in this embodiment, approximately half the width of the weld beads 12a and 12b overlaps). By welding the filler metal made of the nickel alloy, the diluted portions 14a and 14b remaining on both edges of the abutting surfaces of the base metal 11 are removed to complete the overlay welding of this embodiment.
そして、前記高ニッケル合金からなる溶加材を溶接する
際に、高ニッケル合金と炭素鋼との間での炭素の移動が
極めて少ない夕めに、前記溶接ビード15a・15b下
の母材11に希釈部を生じさせるおそれはない。したが
って、前述した肉盛り溶接完了後において、母材11の
突き合わせ面金面に亘って希釈部を除去することができ
る。When welding the filler metal made of the high nickel alloy, the base metal 11 under the weld beads 15a and 15b is There is no risk of creating a diluted part. Therefore, after the above-mentioned build-up welding is completed, the diluted portion can be removed over the abutting metal surfaces of the base metal 11.
一方、前述したように肉盛りf#接された母材11には
、その肉盛り層13#こ第3図(a)に示すよう番ど、
開先16が切削加工によって形成されるとともに、母材
11の両縁部の溶接ビード15B・15bが溶接ビード
12a・12bの一部とともに除去されたのちに、第3
図(b)Iこ示すように、不銹鋼からなる母材17が該
不銹鋼と同材質の溶加材18JCよって溶接される。On the other hand, as mentioned above, the base material 11 that has been in contact with the build-up layer 13# has a number as shown in FIG. 3(a).
After the groove 16 is formed by cutting and the weld beads 15B and 15b on both edges of the base metal 11 are removed together with part of the weld beads 12a and 12b, a third
As shown in Figure (b) I, a base material 17 made of stainless steel is welded with a filler metal 18JC made of the same material as the stainless steel.
該炭素鋼からなる母材11と不銹鋼からなる母材17と
の異讃金属間の溶接において、母材11ζこ希釈部が存
在しないために浴接時における入熱の影響や溶接後にお
ける残留応力の影響が、前記量も11と肉盛り層13と
の境界部に作用することを抑えて、割れ等の発生を防止
する。In welding between different metals, such as the base metal 11 made of carbon steel and the base metal 17 made of stainless steel, since there is no dilution part in the base metal 11ζ, the influence of heat input during bath welding and residual stress after welding are reduced. The above-mentioned amount also suppresses the effect of acting on the boundary between 11 and the built-up layer 13, thereby preventing the occurrence of cracks and the like.
一方、第4図は本発明の他の実施例を示すもので、母材
11の突き合わせ面に肉盛りノー13を第4図(a)に
示すように形成したのちに、母材11の両縁部そ第4図
山)に示すように切削除去し、該切削操作によって形成
された溝19a−19b内に、第4図(C)#こ示すよ
うに高ニッケル合金からなる溶加材20a会20bを埋
め込むように溶接するものである。このような方法によ
ると、母材11の両縁部の希釈部のほとんどを機械的に
除去したの、ちに、残余の希釈部を高ニッケル合金から
なる溶加材20a・20bの溶接時に除去するものであ
るから、希釈部の除去を一層確冥なものとする。On the other hand, FIG. 4 shows another embodiment of the present invention, in which a built-up nozzle 13 is formed on the abutting surfaces of the base material 11 as shown in FIG. 4(a), and then both sides of the base material 11 are The edges are removed by cutting as shown in Fig. 4, and filler metal 20a made of a high nickel alloy is inserted into the grooves 19a-19b formed by the cutting operation, as shown in Fig. 4(C). The welding is done so that the groove 20b is embedded. According to this method, most of the diluted portions on both edges of the base metal 11 are mechanically removed, and the remaining diluted portions are then removed during welding of the filler metals 20a and 20b made of high nickel alloy. This makes the removal of the dilution part even more reliable.
才た、第5図および第6図(a)は本発明を耐に賞性材
料によってライニングされたノズルの端面に適用した例
を示すもので、ノズル21の内面のライニング材22に
連続し、かつ、ノズル21の端面を覆って耐腐食性材料
からなる溶加材をa数パスによって溶接して肉盛り層1
3を形成したのちに、前記端面の外側縁部に高ニッケル
合金からなる溶加材23を前記肉盛り層13の終端部と
重畳させた状態で溶接するようにしたものである。第6
図(b)は第6図(a)の他の実施例であり、外111
11iR部のノズル母材21の希釈部を機械的に除去し
て高ニッケル合金からなる溶加材23で埋め込み溶接し
たものである。これらの実施例では、高ニッケル合金か
らなる溶加材23は前述したように外周のみの一箇所に
溶接すればよい。5 and 6(a) show an example in which the present invention is applied to the end face of a nozzle lined with a durable material, which is continuous with the lining material 22 on the inner surface of the nozzle 21, In addition, a filler metal made of a corrosion-resistant material is welded over the end face of the nozzle 21 in a number of passes to form a built-up layer 1.
3 is formed, a filler metal 23 made of a high nickel alloy is welded to the outer edge of the end face in a state where it overlaps with the terminal end of the build-up layer 13. 6th
FIG. 6(b) is another embodiment of FIG. 6(a), and the outer 111
The diluted part of the nozzle base material 21 in the 11iR part is mechanically removed and filled with a filler metal 23 made of a high nickel alloy and welded. In these embodiments, the filler metal 23 made of a high nickel alloy may be welded to only one location on the outer periphery as described above.
「発明の効果」
以上説明したように、本発明屹よれば次のような優れた
効果を奏する。"Effects of the Invention" As explained above, the present invention provides the following excellent effects.
■ 肉盛り溶接時に生じる母材内の希釈部のI工とんど
を除去して、耐腐食性材料の耐腐食性の低下を防止する
ことができるとともに、母材の強度低下を防止すること
ができる。■ It is possible to prevent a decrease in the corrosion resistance of a corrosion-resistant material by removing most of the I-work in the diluted part in the base metal that occurs during overlay welding, and also to prevent a decrease in the strength of the base metal. I can do it.
■ 母材に肉盛り層を介して異種金属を#接する際lこ
、溶接時の入熱によって母材と肉盛り層との間に熱伸縮
差が生じた場合、あるいは溶接後tこおいて残留応力が
生じた場合にあっても、母材と肉盛り層との境界部への
影響を極力抑えて、割れ等の発生を防止することができ
る。この結果、異種金属の浴接を容易にする。■ When dissimilar metals are brought into contact with the base metal through a build-up layer, if a difference in thermal expansion/contraction occurs between the base metal and the build-up layer due to heat input during welding, or after welding, Even if residual stress occurs, the influence on the boundary between the base material and the built-up layer can be suppressed as much as possible, thereby preventing the occurrence of cracks and the like. As a result, bath welding of dissimilar metals is facilitated.
図面中、第1図は従来の肉盛り溶接方法の一例を示す概
略図、第2図は本発明の一実施例を示す工程図、第3図
はWIz図に示す一実施例によって肉盛り溶接された母
材に異種金属を突き合わせ溶接する際の工程図、第4図
は本発明の他の実施例を示す工程図、tfJ5図および
第6図は、本発明をノズルに適用した例を示すもので、
第5図はノズルの一部を断面した側面図、第6図は第5
図のV1部分の拡大図である。
11・・・・・・母材、12・・・・・・溶接ビード、
12a・・・・・・(最初のパスの)溶接ビード、12
b・・・・・・(最終のパスの)溶接ビード、13・・
・・・・肉盛り層、14a。
14b・・・・・・希釈部、I5a、15b・・・・・
・浴接ビード、 19 a 、19 b−−−・−・溝
、 20 g 、 20 b−−−・−溶加材、23・
・・・・・溶加材。
出願人 石川島播磨電工業株式会社
第1図
第2図
第3図
第4図
20゜
(0)
第5図
!In the drawings, FIG. 1 is a schematic diagram showing an example of a conventional build-up welding method, FIG. 2 is a process diagram showing an embodiment of the present invention, and FIG. Fig. 4 is a process chart showing another embodiment of the present invention, and Figs. tfJ5 and 6 show an example in which the present invention is applied to a nozzle. Something,
Figure 5 is a partially sectional side view of the nozzle, and Figure 6 is a side view of the nozzle.
It is an enlarged view of the V1 part of the figure. 11...Base metal, 12...Weld bead,
12a... (first pass) weld bead, 12
b...Weld bead (of the final pass), 13...
...Filled layer, 14a. 14b... Dilution section, I5a, 15b...
・Bath welding bead, 19 a, 19 b --- Groove, 20 g, 20 b --- Filler metal, 23.
...Filler metal. Applicant Ishikawajima Harima Electric Industry Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 20° (0) Figure 5!
Claims (1)
性材料を複数パスのS接ビードを相互に一部重畳させな
がら溶接して肉−りf−を形成するとともに、前段の溶
接ビード下に生じる母材の希釈部を後段の溶接ビードの
形成時に順次除去し、最初のパスあるいは最終のパスの
何れか一方のパスによって形成された溶接ビードに沿っ
て、該溶接ビード下1ζ残存する希釈部を除去するため
に高ニッケル合金からなる溶加材で溶接することを特徴
とする肉盛り溶接方法。A non-corrosion resistant material is welded to a base material such as carbon steel or low alloy steel with multiple passes of the S-weld bead partially overlapping each other to form the fillet f-. The diluted portion of the base metal that occurs under the weld bead is sequentially removed during the subsequent weld bead formation, and the diluted portion under the weld bead is removed along the weld bead formed by either the first pass or the final pass. 1ζ A build-up welding method characterized by welding with a filler metal made of a high nickel alloy in order to remove the remaining diluted part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24337083A JPS60133975A (en) | 1983-12-23 | 1983-12-23 | Build-up welding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24337083A JPS60133975A (en) | 1983-12-23 | 1983-12-23 | Build-up welding method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60133975A true JPS60133975A (en) | 1985-07-17 |
Family
ID=17102829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24337083A Pending JPS60133975A (en) | 1983-12-23 | 1983-12-23 | Build-up welding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60133975A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6204477B1 (en) * | 1997-12-31 | 2001-03-20 | Wsi Welding Services, Inc. | Method to eliminate weld solidification cracking of 312 stainless steel overlay and to minimize the overlay's thermal expansion mismatch with carbon steel or low alloy steel substrate |
US6781083B1 (en) | 2001-08-08 | 2004-08-24 | Howard Derrick Keller | Weld overlay system |
US6858813B1 (en) | 2002-05-03 | 2005-02-22 | Howard Derrick Keller | Weld overlay system |
-
1983
- 1983-12-23 JP JP24337083A patent/JPS60133975A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6204477B1 (en) * | 1997-12-31 | 2001-03-20 | Wsi Welding Services, Inc. | Method to eliminate weld solidification cracking of 312 stainless steel overlay and to minimize the overlay's thermal expansion mismatch with carbon steel or low alloy steel substrate |
US6781083B1 (en) | 2001-08-08 | 2004-08-24 | Howard Derrick Keller | Weld overlay system |
US6858813B1 (en) | 2002-05-03 | 2005-02-22 | Howard Derrick Keller | Weld overlay system |
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