CN101323042A - Iron white copper and low-carbon steel dissimilar metal material arc melting and welding method - Google Patents
Iron white copper and low-carbon steel dissimilar metal material arc melting and welding method Download PDFInfo
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- CN101323042A CN101323042A CNA2008100124155A CN200810012415A CN101323042A CN 101323042 A CN101323042 A CN 101323042A CN A2008100124155 A CNA2008100124155 A CN A2008100124155A CN 200810012415 A CN200810012415 A CN 200810012415A CN 101323042 A CN101323042 A CN 101323042A
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Abstract
The invention relates to an electric arc melting welding method of copper-nickel-iron alloy and low carbon steel dissimilar materials, discloses a non-preheating electric arc melting welding method which adopts the direct current welding power output more than 350A and the protective gas of pure helium and welds a thick-wall large-diameter copper-nickel-iron alloy pipe and a low carbon welded joint by adding the nickel-copper alloy welding wires in the welding and is characterized in that in the non-preheating welding process, a tungsten electrode with the diameter of Phi 3.2 to 4mm is adopted and the pure helium is adopted for the protection and the nickel-copper alloy welding wires of Phi 2 to 4mm are added for the welding; at the same time, the welding current of 175 to 350A and the flow volume of the protective gas of 10 to 15L per minute are ensured. The method has the positive effects of solving the problems of welding the welded joints of the thick-wall large-diameter copper-nickel-iron alloy and the low carbon welded joints and the hot cracking and stomata in the welding process under the non-preheating condition.
Description
Technical field
The present invention relates to a kind of welding method, particularly relate to a kind of iron white copper and low-carbon steel dissimilar metal material arc melting and welding method.
Background technology
Iron white copper (as BFe10-1-1 and BFe30-1-1) has better comprehensive mechanical property, and its thermal conductivity approaches mild steel and than being easier to welding, do not need preheating when welding.Different with mild steel is: BFe10-1-1 and BFe30-1-1 iron white copper are corronil, no tangible phase transition process in welding process, and linear expansion coefficient is high more about 50% than mild steel, can produce bigger stress and distortion during welding; The iron white copper fusing point is lower 200-300 ℃ than mild steel, and is very sensitive to sulphur, phosphorus impurities, easily forms fire check; Simultaneously, owing to contain more nickel in the iron white copper, nickel can be increased sharply the solubility of hydrogen in copper, so when welding, the iron white copper weld seam can be very sensitive to hydrogen blistering.During the mild steel welding, generally do not need preheating, its excellent weldability.At present, welding of foreign material etc. does not all have ready-made standard to follow at home between heavy wall iron white copper tubing and pipeline fittings thereof and mild steel.
Summary of the invention
The technical problem to be solved in the present invention, providing a kind of heavy wall heavy caliber iron white copper pipeline and mild steel can realized welds, and avoid hot cracking tendency and pore problem in the welding process, guarantee the iron white copper and the low-carbon steel dissimilar metal material arc melting and welding method of welding point overall synthetic performance.
The technical solution used in the present invention is:
Iron white copper and low-carbon steel dissimilar metal material arc melting and welding method; be the direct current source of welding current (output current is greater than 350A) that adopts power output bigger, with the argon tungsten-arc welding of pure argon as protective gas, thereby realize that heavy wall heavy caliber iron white copper pipeline and mild steel weld seam non-prewarming arc melting weld.Its method is as follows:
(1) with heavy wall heavy caliber iron white copper pipeline to be welded and mild steel member finished edge.
(2) remove interior oxide skin, oil, rust, water and other dirt of 30mm scope around the place to be welded, and use the acetone wiped clean.
(3) tack weld welding adopts argon tungsten-arc welding to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is (55～75%) by weight percentage: (45～25%), and welding current 175～350A, protective gas are pure argon, flow is 10～15L/min, the tungsten electrode diameter
Tack weld length is 10～15mm, and the distance between two tack welds is about 100～150mm.
(4) formal weld seam welding adopts GTAW to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is (55～75%): (45～25%), and welding current 175-350A, protective gas are pure argon, flow is 10-15L/min, the tungsten electrode diameter
Dose the corronil welding wire and reduce bath temperature by manual, improve the weld seam setting temperature, intensity, plasticity, prevent crackle and pore.
The good effect that the present invention obtains is:
(1) solved the Welding Problems of heavy wall heavy caliber iron white copper and low-carbon steel dissimilar metal material;
(2) solved hot cracking tendency problem in heavy wall heavy caliber iron white copper pipeline and the low-carbon steel dissimilar metal material welding process;
(3) solved pore problem in heavy wall heavy caliber iron white copper pipeline and the low-carbon steel dissimilar metal material welding process.
The specific embodiment
Embodiment one
Below in conjunction with technical scheme narration the specific embodiment of the present invention.
Iron white copper and low-carbon steel dissimilar metal material arc melting welding, its method and step are as follows:
(1) with heavy wall heavy caliber iron white copper pipeline to be welded and mild steel member finished edge.
(2) remove interior oxide skin, oil, rust, water and other dirt of 30mm scope around the place to be welded, and use the acetone wiped clean.
(3) tack weld welding adopts argon tungsten-arc welding to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 55%: 45% by weight percentage, and welding current 175A, protective gas are pure argon, and flow is 10L/min, the tungsten electrode diameter
Tack weld length is 10mm, and the distance between two tack welds is about 100mm.
(4) formal weld seam welding adopts GTAW to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 55%: 45%, and welding current 175A, protective gas are pure argon, and flow is 10L/min, the tungsten electrode diameter
Embodiment two
Below in conjunction with technical scheme narration the specific embodiment of the present invention.
Iron white copper and low-carbon steel dissimilar metal material arc melting welding, its method and step are as follows:
(1) with heavy wall heavy caliber iron white copper pipeline to be welded and mild steel member finished edge.
(2) remove interior oxide skin, oil, rust, water and other dirt of 30mm scope around the place to be welded, and use the acetone wiped clean.
(3) tack weld welding adopts argon tungsten-arc welding to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 62%: 38% by weight percentage, and welding current 180A, protective gas are pure argon, and flow is 12L/min, the tungsten electrode diameter
Tack weld length is 12mm, and the distance between two tack welds is about 125mm.
(4) formal weld seam welding adopts GTAW to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 62%: 38%, and welding current 180A, protective gas are pure argon, and flow is 12L/min, the tungsten electrode diameter
Embodiment three
Iron white copper and low-carbon steel dissimilar metal material arc melting welding, its method and step are as follows:
(1) with heavy wall heavy caliber iron white copper pipeline to be welded and mild steel member finished edge.
(2) remove interior oxide skin, oil, rust, water and other dirt of 30mm scope around the place to be welded, and use the acetone wiped clean.
(3) tack weld welding adopts argon tungsten-arc welding to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 75%: 25% by weight percentage, and welding current 300A, protective gas are pure argon, and flow is 15L/min, the tungsten electrode diameter
Tack weld length is 15mm, and the distance between two tack welds is about 150mm.
(4) formal weld seam welding adopts GTAW to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 75%: 25%, and welding current 350A, protective gas are pure argon, and flow is 15L/min, the tungsten electrode diameter
Claims (1)
1, iron white copper and low-carbon steel dissimilar metal material arc melting and welding method, it is the direct current source of welding current that adopts output 175～350A, with argon tungsten-arc welding welding heavy wall heavy caliber iron white copper pipeline and the mild steel weld seam method of pure argon, before welding, need finish following preorder work: with heavy wall heavy caliber iron white copper pipeline to be welded and mild steel member finished edge as protective gas; Remove interior oxide skin, oil, rust, water and other dirt of 30mm scope around the place to be welded, and use the acetone wiped clean, it is characterized in that comprising following welding procedure step:
1), tack weld welding, adopt argon tungsten-arc welding to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 55～75%: 45～25% by weight percentage, and welding current 180～300A, protective gas are pure argon, and flow is 10～15L/min, the tungsten electrode diameter
Tack weld length is 10～15mm, and the distance between two tack welds is about 100～150mm;
2), formally weld seam welds, and adopts GTAW to dose
The welding of corronil welding wire, in the corronil welding wire, the content ratio scope of copper and nickel is 55～75%: 45～25%, and welding current 180-300A, protective gas are pure argon, and flow is 10-15L/min, the tungsten electrode diameter
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100124155A CN101323042B (en) | 2008-07-22 | 2008-07-22 | Iron white copper and low-carbon steel dissimilar metal material arc melting and welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100124155A CN101323042B (en) | 2008-07-22 | 2008-07-22 | Iron white copper and low-carbon steel dissimilar metal material arc melting and welding method |
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| CN101323042A true CN101323042A (en) | 2008-12-17 |
| CN101323042B CN101323042B (en) | 2011-06-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623790B (en) * | 2009-07-31 | 2011-12-14 | 中国化学工程第十四建设有限公司 | Welding method of cupronickel weldment |
| CN102500872A (en) * | 2011-10-17 | 2012-06-20 | 烟台鲁宝有色合金有限公司 | Copper-steel dissimilar metal welding method |
| CN103801800A (en) * | 2013-11-28 | 2014-05-21 | 青岛蓝图文化传播有限公司市南分公司 | Argon-arc welding process for thick-walled iron white copper tubes |
-
2008
- 2008-07-22 CN CN2008100124155A patent/CN101323042B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623790B (en) * | 2009-07-31 | 2011-12-14 | 中国化学工程第十四建设有限公司 | Welding method of cupronickel weldment |
| CN102500872A (en) * | 2011-10-17 | 2012-06-20 | 烟台鲁宝有色合金有限公司 | Copper-steel dissimilar metal welding method |
| CN103801800A (en) * | 2013-11-28 | 2014-05-21 | 青岛蓝图文化传播有限公司市南分公司 | Argon-arc welding process for thick-walled iron white copper tubes |
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| Publication number | Publication date |
|---|---|
| CN101323042B (en) | 2011-06-08 |
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Owner name: BOHAI SHIPYARD GROUP CO., LTD. Free format text: FORMER OWNER: BOHAI SHIP HEAVY INDUSTRY CO LTD. Effective date: 20100816 |
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