JPS6125466B2 - - Google Patents
Info
- Publication number
- JPS6125466B2 JPS6125466B2 JP17205081A JP17205081A JPS6125466B2 JP S6125466 B2 JPS6125466 B2 JP S6125466B2 JP 17205081 A JP17205081 A JP 17205081A JP 17205081 A JP17205081 A JP 17205081A JP S6125466 B2 JPS6125466 B2 JP S6125466B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- base metal
- laminate
- clad steel
- groove
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 73
- 238000003466 welding Methods 0.000 claims description 33
- 238000005253 cladding Methods 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000010953 base metal Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000002648 laminated material Substances 0.000 claims description 10
- 239000011324 bead Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はクラツド鋼材の溶接方法に係り、特に
溶接作業を大幅に簡略化できると共に、溶接割れ
および脆化を防止し、溶接品質の安定化を計つた
たクラツド鋼材の溶接方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a welding method for clad steel materials, and in particular, it greatly simplifies welding work, prevents weld cracking and embrittlement, and stabilizes weld quality. This invention relates to a welding method for clad steel materials.
［発明の技術的背景とその問題点］
一般にクラツド鋼は軟鋼からなる母材に耐蝕性
等を有するステンレス、ニツケル、キユプロニツ
ケルなどの合せ材を張り合せたものであり、近
年、石油化学プラント、原子力プラント、海水淡
水化プラント、船舶等の広範囲な分野に広く採用
されている。[Technical background of the invention and its problems] Generally, clad steel is made by laminating a base material made of mild steel with a laminate material such as stainless steel, nickel, or cypronickel, which has corrosion resistance. It is widely used in a wide range of fields such as plants, seawater desalination plants, and ships.
従来のクラツド鋼材の溶接方法を第１図，
，，に基づいて説明し、併せてその問題点
を以下に述べる。第１図乃至において、１は
軟鋼からなる母材２にステンレス等の耐蝕性を有
する合せ材３を張り合せたクラツド鋼材である。 Figure 1 shows the conventional welding method for clad steel materials.
, , and the problems thereof will be described below. In FIGS. 1 and 1, reference numeral 1 is a clad steel material in which a base material 2 made of mild steel is laminated with a corrosion-resistant laminate material 3 such as stainless steel.
まず、第１図に示すように、クラツド鋼材１
の接合部の母材側に開先４を設ける。次に第１図
のごとく、母材２側を軟鋼溶接材料で溶接す
る。同図中に破線で示すように初層の溶込みが深
いと母材２側の溶接金属６に合せ材３が溶融する
懸念がある。溶接金属６に合せ材３が溶融する
と、溶接金属６内に、割れが発生するか、もしく
は脆化が生じるため、クラツド鋼材１の母材２側
の溶接は、適正条件範囲が狭く、安定性に欠け、
サブマージ溶接等の大入熱溶接の適用が難かし
い。このため、この母材２側の溶接において、溶
接金属６の第１層部分６ａの溶け込みを浅くし
て、合せ材３の溶融を防ぐ。 First, as shown in Fig. 1, a clad steel material 1
A groove 4 is provided on the base metal side of the joint. Next, as shown in FIG. 1, the base metal 2 side is welded using mild steel welding material. As shown by the broken line in the figure, if the penetration of the initial layer is deep, there is a concern that the cladding material 3 will melt into the weld metal 6 on the base metal 2 side. When the cladding material 3 melts into the weld metal 6, cracks occur or embrittlement occurs in the weld metal 6. Therefore, when welding the base metal 2 side of the clad steel material 1, the range of appropriate conditions is narrow and the stability is poor. Lacking,
Difficult to apply high heat input welding such as submerged welding. Therefore, in welding on the base metal 2 side, the penetration of the first layer portion 6a of the weld metal 6 is made shallow to prevent the cladding material 3 from melting.
次に、合せ材側から、裏はつりをする。裏はつ
りは、例えば、アークエアガウジングで溝を掘
り、その後グラインダーで表面を研削する方法が
とられており、合せ材３側は、第１図のごとく
削り取られる。この裏はつりには多くの工数を要
し、作業時間がかかると共に、粉塵飛散等を伴い
作業環境の低下を招く。また裏はつり深さｋは、
通常合せ材の厚さをlcとするとｋ≧lc＋４（mm）
までなされ、合せ材側の溶接量が多くなる。 Next, hang the back side from the laminate side. For the back chisel, for example, a groove is dug with arc air gouging, and then the surface is ground with a grinder, and the laminate 3 side is ground off as shown in Figure 1. This back-cutting requires a lot of man-hours, takes a long time, and causes dust scattering, etc., resulting in a deterioration of the working environment. Also, the depth k of the back is
If the thickness of the normal laminated material is lc, then k≧lc+4 (mm)
As a result, the amount of welding on the cladding material side increases.
最後に第１図（）に示すように合せ材３側の
溶接を行う。ところが、上記裏はつり量が多いの
で、合せ材３側の高価な溶接材料の使用量が多く
なるためコストアツプをもたらす。また合せ材３
の材質が母材２の軟鋼に比べて強度が低い場合に
は、（例えば、純銅、キユプロニツケル等）、合せ
材３と同材質系の溶接金属７深さと母材２板厚の
比率が大になるために、継手強度が低下し、規定
の母材強度が得られないことがある。 Finally, as shown in FIG. 1(), welding is performed on the cladding material 3 side. However, since the back side has a large amount of hanging, the amount of expensive welding material used on the side of the laminate 3 increases, resulting in an increase in costs. Also, laminating material 3
If the material is lower in strength than the mild steel of the base material 2 (for example, pure copper, Cypronickel, etc.), the ratio of the depth of the weld metal 7 made of the same material as the cladding material 3 to the thickness of the base material 2 will be large. As a result, the joint strength decreases and the specified base material strength may not be obtained.
［発明の目的］
本発明は、以上の従来の溶接方法における問題
を有効に解決すべく創案されたものであり、本発
明の目的は、母材側の溶接金属に裏波ビードを形
成でき、裏はつりが不要となり、工期が短縮でき
ると共に、母材側の溶接金属内に合せ材が溶融す
ることがなく、溶接割れおよび脆化を防止でき、
更に大入熱溶接の適用もまた可能なクラツド鋼材
の溶接方法を提供することにある。[Object of the Invention] The present invention was devised to effectively solve the problems in the conventional welding method described above, and an object of the present invention is to form an underwave bead in the weld metal on the base metal side, No lifting is required on the back side, shortening the construction period, and the cladding material does not melt into the weld metal on the base metal side, preventing weld cracking and embrittlement.
Furthermore, the application of high heat input welding is also possible in providing a method of welding clad steel materials.
［発明の概要］
上記の目的を達成するために、本発明は、クラ
ツド鋼材の接合部に、その母材側および合せ材側
の両側に開先を形成し、該合せ材側の開先深さlt
を合せ材の板厚lcに対しlt＞lc＋１（mm）とし、
合せ材側の開先内に可塑性および断熱性を有する
裏当て材を充填し、母材側から溶接を行ない裏当
て材の断熱により母材側の溶接金属中への合せ材
の溶融を阻止しつつ母材側の溶接金属の裏面に裏
波ビードを形成し、裏当て材を除去した後、合せ
材側を溶接するようになしたものである。[Summary of the Invention] In order to achieve the above object, the present invention forms a groove on both sides of the base material side and the cladding material side in the joint of clad steel materials, and increases the groove depth on the cladding material side. lt
Let lt > lc + 1 (mm) for the thickness lc of the laminated material,
A backing material with plasticity and heat insulation properties is filled into the groove on the cladding material side, and welding is performed from the base metal side, and the insulation of the backing material prevents the cladding material from melting into the weld metal on the base metal side. At the same time, an underwave bead is formed on the back surface of the weld metal on the base metal side, and after the backing material is removed, the cladding material side is welded.
［実施例］
以下に本発明方法の具体的実施例を第２図に従
つて詳述する。[Example] A specific example of the method of the present invention will be described in detail below with reference to FIG.
第２図ａ乃至ｅにおいて、１は軟鋼等からなる
母材２に耐蝕性等を有するステンレス、キユプロ
ニツケルなどの合せ材を張り合せたクラツド鋼材
である。 In FIGS. 2a to 2e, reference numeral 1 is a clad steel material in which a base material 2 made of mild steel or the like is laminated with a laminate material such as stainless steel or Cypronickel having corrosion resistance.
まず、第２図ａに示すようにクラツド鋼材１の
接合部の母材２側および合せ材３側の両側にそれ
ぞれ開先４，５を設ける。ここで、健全な裏波ビ
ードを得るためには、開先深さltは、合せ材板厚
をlcとすると、lt＞lc＋1.0（mm）の要件を満たす
必要がある。その他の開先形状は、使用する溶接
方法により種々に変えられることは勿論である。 First, as shown in FIG. 2a, grooves 4 and 5 are provided on both sides of the base material 2 side and the laminate material 3 side of the joint portion of the clad steel material 1, respectively. Here, in order to obtain a sound Uranami bead, the groove depth lt needs to satisfy the requirement of lt>lc+1.0 (mm), where lc is the thickness of the laminated material. Of course, other groove shapes can be varied depending on the welding method used.
次に、第２図ｂに示すように、合せ材３側の開
先５内に可塑性に富む裏当て材８を充填する。裏
当て材８は耐熱性・断熱性を有する粘土状のもの
であり、開先５内に容易に押し込むことができ
る。そして、開先５内の裏当て材８が離脱しない
ように合せ材３に粘着テープ９を張り付ける。 Next, as shown in FIG. 2b, a highly plastic backing material 8 is filled into the groove 5 on the side of the laminate 3. The backing material 8 is a clay-like material having heat resistance and heat insulation properties, and can be easily pushed into the groove 5. Then, an adhesive tape 9 is applied to the lining material 3 so that the backing material 8 within the groove 5 does not come off.
その後、母材２側から第２図ｃのように溶接を
行う。合せ材３側の開先５内に裏当て材８が充填
されていることにより、母材２側の溶接金属６の
裏面に、健全な裏波ビード１０が形成される。こ
のため、裏はつり作業は不要となり作業時間を大
幅に短縮化できる。また裏当て材８の熱的および
機械構造的なバリヤーとしての存在により、母材
２側から合せ材３側への入熱を低減し且つ溶接金
属６への合せ材３の溶け込みを防止でき、母材２
側の溶接金属６内に合せ材３が溶融することがな
くなり、溶接金属６の割れ発生や脆化を防止で
き、更にサブマージ溶接等の大入熱溶接の適用も
可能となる。 Thereafter, welding is performed from the base metal 2 side as shown in FIG. 2c. By filling the groove 5 on the side of the mating material 3 with the backing material 8, a healthy underwave bead 10 is formed on the back surface of the weld metal 6 on the base material 2 side. For this reason, back chiseling work is not required, and the work time can be significantly shortened. In addition, the existence of the backing material 8 as a thermal and mechanical structural barrier reduces heat input from the base metal 2 side to the laminate material 3 side, and prevents the laminate material 3 from melting into the weld metal 6. Base material 2
The cladding material 3 is not melted into the side weld metal 6, and cracking and embrittlement of the weld metal 6 can be prevented, and high heat input welding such as submerged welding can also be applied.
次いでクラツド鋼材１を反転して、裏当て材８
を除去し（第２図ｄ参照）、最後に第２図ｅのご
とく、合せ材３側を溶接する。このように、裏は
つりを行わずに裏波ビード１０を出す溶接方法を
とつているので、合せ材３側の溶接金属７の量が
少くて済み、一般に高価な合せ材側溶接材料費を
削減できる。 Next, the clad steel material 1 is turned over and the backing material 8 is
(see Fig. 2 d), and finally weld the laminate 3 side as shown in Fig. 2 e. In this way, since the welding method is used to produce the Uranami bead 10 without lifting the back side, the amount of weld metal 7 on the laminate 3 side can be reduced, reducing the cost of welding materials on the laminate side, which are generally expensive. can.
［発明の効果］
以上の説明より明らかなように、本発明によれ
ば次のような優れた効果を発揮することができ
る。[Effects of the Invention] As is clear from the above description, according to the present invention, the following excellent effects can be exhibited.
(1) 合せ材側の開先内に裏当て材を充填して、母
材側を溶接しているので、母材側の溶接金属の
裏面に裏波ビードを形成でき、裏はつり作業が
不要となり、溶接作業の簡略化および作業時間
の短縮化が図れる。(1) Backing material is filled in the groove on the laminate side and the base metal side is welded, so a back wave bead can be formed on the back side of the weld metal on the base metal side, eliminating the need for back chiseling work. Therefore, the welding work can be simplified and the working time can be shortened.
(2) 裏当て材の遮断および断熱作用により、換言
すれば裏当て材のバリヤー効果により、母材側
の溶接金属中に合せ材が溶融することがなく、
溶接金属の割れの発生および脆化を防止できる
ことから、大入熱溶接法であるサブマージや
MIG等の溶接法の適用もまた可能となる。(2) Due to the blocking and insulating effects of the backing material, in other words, due to the barrier effect of the backing material, the cladding material does not melt into the weld metal on the base metal side.
Submerged welding, which is a high heat input welding method, can prevent cracking and embrittlement of weld metal.
It also becomes possible to apply welding methods such as MIG.
(3) 合せ材側の溶接金属量が少くなり、高価な合
せ材側溶接材料費を削減できると共に溶接継手
部の耐蝕性、強度等も良好である。(3) The amount of weld metal on the cladding side is reduced, reducing the cost of expensive welding materials on the cladding side, and the corrosion resistance and strength of the welded joint are also good.
第１図，，，は従来の溶接方法の各工
程を示す概略横断面図、第２図ａ，ｂ，ｃ，ｄ，
ｅは本発明に係るクラツド鋼材の溶接方法の実施
例の各工程を示す概略横断面図である。
図中、１はクラツド鋼材、２は母材、３は合せ
材、４，５は開先、６は母材側の溶接金属、８は
裏当て材、１０は裏波ビード、７は合せ材側の溶
接金属である。
Figure 1,... are schematic cross-sectional views showing each step of the conventional welding method, Figure 2 a, b, c, d,
FIG. 3e is a schematic cross-sectional view showing each step of an embodiment of the method for welding clad steel materials according to the present invention. In the figure, 1 is clad steel material, 2 is base material, 3 is cladding material, 4 and 5 are grooves, 6 is weld metal on the base metal side, 8 is backing material, 10 is Uranami bead, 7 is cladding material It is the welded metal on the side.
Claims (1)
クラツド鋼材の接合部に、その母材側および合せ
材側の両側に開先を形成し、該合せ材側の開先深
さltを合せ材の板厚lcに対しlt＞lc＋１（mm）と
し、合せ材側の開先内に可塑性および断熱性を有
する裏当て材を充填し、母材側から溶接を行ない
裏当て材の断熱により母材側の溶融金属中への合
せ材の溶融を阻止しつつ母材側の溶接金属の裏面
に裏波ビードを形成し、裏当て材を除去した後、
合せ材側を溶接することを特徴とするクラツド鋼
材の溶接方法。1 In the method of welding clad steel materials,
A groove is formed on both sides of the base metal side and the cladding material side in the joint of the clad steel materials, and the groove depth lt on the cladding material side is set to lt > lc + 1 (mm) with respect to the plate thickness lc of the cladding material. A backing material with plasticity and heat insulation properties is filled into the groove on the laminate side, and welding is performed from the base metal side, and the insulation of the backing material prevents the laminate material from melting into the molten metal on the base metal side. While doing so, a uranami bead is formed on the back side of the weld metal on the base metal side, and after removing the backing material,
A method for welding clad steel materials, which is characterized by welding the cladding material side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17205081A JPS5874297A (en) | 1981-10-29 | 1981-10-29 | Welding method for clad steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17205081A JPS5874297A (en) | 1981-10-29 | 1981-10-29 | Welding method for clad steel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5874297A JPS5874297A (en) | 1983-05-04 |
| JPS6125466B2 true JPS6125466B2 (en) | 1986-06-16 |
Family
ID=15934601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17205081A Granted JPS5874297A (en) | 1981-10-29 | 1981-10-29 | Welding method for clad steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5874297A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6153474U (en) * | 1984-09-12 | 1986-04-10 | ||
| JPH01235785A (en) * | 1988-03-14 | 1989-09-20 | Mitsui Mining & Smelting Co Ltd | Lock device for car body |
| JPH069268Y2 (en) * | 1986-08-07 | 1994-03-09 | 株式会社大井製作所 | Lock device for automobile |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137602U (en) * | 1984-02-25 | 1985-09-12 | 不二精工株式会社 | rim |
| JPS6431577A (en) * | 1987-07-27 | 1989-02-01 | Nippon Kokan Kk | Welding method for clad material |
-
1981
- 1981-10-29 JP JP17205081A patent/JPS5874297A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6153474U (en) * | 1984-09-12 | 1986-04-10 | ||
| JPH069268Y2 (en) * | 1986-08-07 | 1994-03-09 | 株式会社大井製作所 | Lock device for automobile |
| JPH01235785A (en) * | 1988-03-14 | 1989-09-20 | Mitsui Mining & Smelting Co Ltd | Lock device for car body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5874297A (en) | 1983-05-04 |
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