CN101323044A - Thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method - Google Patents
Thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method Download PDFInfo
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- CN101323044A CN101323044A CNA2008100124189A CN200810012418A CN101323044A CN 101323044 A CN101323044 A CN 101323044A CN A2008100124189 A CNA2008100124189 A CN A2008100124189A CN 200810012418 A CN200810012418 A CN 200810012418A CN 101323044 A CN101323044 A CN 101323044A
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Abstract
The invention discloses a non-preheating electric arc melting welding method of thick-wall red copper and austenitic stainless steel, which includes the following processing steps: 1. the method adopts tungsten electrode helium arc welding added with nickel-copper alloy welding wires of Phi 2 to 4mm for welding; the welding current is 180 to 400A; protective gas is pure helium, the flow volume of which is 10 to 15L per minute; the diameter of the tungsten electrode is Phi 4 to 5mm; the length for positioned welded joints is 10 to 15mm and the distance between the two welded joints is 100 to 150mm; 2. the method adopts the tungsten electrode helium arc welding added with the nickel-copper alloy welding wires of Phi 2 to 4mm for welding under the non-preheating condition; the welding current is 180 to 400A; the protective gas is helium, the flow volume of which is 10 to 15L/min; 3. after the backing welding, the non-preheating welding is used for filling the welded joint. The method solves the problems of the non-preheating welding of the thick-wall red copper and austenitic stainless steel and the hot cracking trend, which improves the solidification temperature, strength and plasticity of the welded joint and prevents the hot cracking and stomata by adding the nickel-copper alloy welding wire by hand.
Description
Technical field
The present invention relates to a kind of welding method, particularly relate to a kind of thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method.
Background technology
Every performances such as red copper and austenitic stainless steel thermal conductivity, linear expansion coefficient and shrinkage factor differ all bigger.And the welding of red copper needs heating synchronously in weld preheating, the weldering; Austenitic stainless steel does not generally need preheating, adopts manual electric arc welding, inert gas-shielded arc welding, plasma arc welding (PAW) etc. can both guarantee the realization of welding.At present, red copper and the welding of the austenitic stainless steel foreign material flame brazing methods that adopt need preheating more than 550 ℃ more during welding, the welding condition very severe, and efficiency is low.If adopt stainless steel weld joint, then when the weld seam copper content reaches some, will produce fire check; If adopt the red copper weld seam, then make the weld metal hardening, become fragile owing to elements such as having incorporated Ni, Cr, Fe in the weld seam, perhaps copper infiltrates stainless steel one side, and nearly seam district austenite grain boundary also can produce the infiltration crackle.Welding quality is difficult for guaranteeing that Weld Performance (intensity, plasticity, resistance to corrosion seawater etc.) is very poor that the mother metal performance loss is also very big.
Summary of the invention
The technical problem to be solved in the present invention, provide a kind of under the condition of not preheating, can realize the welding of thick-wall red copper and austenitic stainless steel, and avoid hot cracking tendency in the welding process, guarantee the thick-wall red copper and the austenitic stainless steel non-prewarming arc melting and welding method of welding point overall synthetic performance.
The technical solution used in the present invention is:
Thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method; be the direct current source of welding current (output current is greater than 400A) that adopts power output bigger, with the tungsten polar helium arc method of pure helium as protective gas; improve arc power and electric arc penetration ability, thereby realize thick-wall red copper (wall thickness 〉=6mm) weld with the weldering of austenitic stainless steel weld joint non-prewarming arc melting.Its method is as follows:
(1) thick-wall red copper to be welded and stainless steel component connecting portion are processed into " V " shape groove.
(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 adopts tungsten polar helium arc to dose
The welding of monel welding wire, welding current 180～400A, protective gas are pure helium, and flow is 10～15L/min, and the tungsten electrode diameter adopts
Tack weld length is 10～15mm, and the distance between two tack welds is 100～150mm.
(4) weld seam bottoming welding adopts not preheating of tungsten polar helium arc to dose
The welding of monel welding wire, welding current 180～400A, protective gas are pure helium, flow 10～15L/min, the tungsten electrode diameter is
Need during operation electric arc is pointed to heat conduction ratio red copper one side faster, utilize electric arc edge heat that austenitic stainless steel is melted, it is overheated to prevent, and reduces bath temperature by dosing the monel welding wire, improves weld seam setting temperature, intensity, plasticity, prevents crackle and pore; To guarantee in the welding process that electric arc stops slightly in joint mother metal red copper one side, and not stop, to guarantee that root of joint fusion is good and to realize appearance of weld in austenitic stainless steel one side.
(5) after backing run welds, can adopt tungsten polar helium arc and dose
Weld seam is filled in the pre-thermal weld of monel welding wire, and the monel welding wire that welding is selected for use, protective gas, welding variables are welded identical with the weld seam bottoming.
In the above-mentioned described monel welding wire, the content ratio scope of nickel and copper is (60～70%): (40～30%).
The good effect that the present invention obtains is:
(1) the method welding thick-wall red copper of employing arc fusion welding under the condition of not preheating and the Welding Problems of austenitic stainless steel weld joint have been solved;
(2) solved the problem of hot cracking tendency in thick-wall red copper and the austenitic stainless steel weld joint welding process;
(3) by the manual monel welding wire of dosing, reduce bath temperature, improved weld seam setting temperature, intensity, plasticity, prevent crackle, pore.
Weldquality is poor when (4) having solved austenitic stainless steel weld joint employing gas brazing welding, the mother metal performance loss is big, property of welded joint seriously descends, the big and abominable problem of execution conditions of labor strength.
The specific embodiment
Embodiment 1
Below in conjunction with technical scheme narration the specific embodiment of the present invention.
Thick-wall red copper and austenitic stainless steel non-prewarming arc melting welding, its method and step are as follows:
(1) thick-wall red copper to be welded and austenitic stainless steel member connecting portion are processed into " V " shape groove.
(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 adopts tungsten polar helium arc to dose
The welding of monel welding wire, wherein, the content ratio scope of nickel and copper is 60%: 40% by weight percentage, and welding current is 180A, and protective gas adopts pure helium, and flow is 10～15L/min, adopts diameter
Tungsten electrode, the tack weld weld length guarantees that at 10mm the distance between two tack welds is 100mm.
(4) weld seam bottoming welding adopts not preheating of tungsten polar helium arc to dose
Monel welding wire welding method, wherein, the content ratio scope of nickel and copper is 60%: 40%, and welding parameter is: welding current is 180A, and protective gas is pure helium, and its flow is 10L/min, the tungsten electrode diameter
In the welding process, electric arc is pointed to heat conduction ratio red copper one side faster, utilize electric arc edge heat that mild steel is melted, it is overheated to prevent, and reduce bath temperature by dosing the monel welding wire, and improve the weld seam setting temperature, intensity, plasticity, prevent crackle and pore; And, electric arc is stopped slightly in joint mother metal red copper one side, and does not stop, to guarantee that root of joint fusion is good and to realize appearance of weld in austenitic stainless steel one side.
(5) after backing run welded, employing not preheating of tungsten polar helium arc was also dosed
Weld seam is filled in the welding of monel welding wire, and the monel welding wire that welding is selected for use, protective gas, standard parameter weld identical with the weld seam bottoming.
Embodiment 2
Thick-wall red copper and austenitic stainless steel welding, its method and step are as follows:
(1) thick-wall red copper to be welded and austenitic stainless steel member connecting portion are processed into " V " shape groove.
(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 adopts tungsten polar helium arc to dose
The welding of monel welding wire, wherein, the content ratio scope of nickel and copper is 65%: 35% by weight percentage, and welding current is 200A, and protective gas adopts pure helium, and flow is 12L/min, adopts diameter
Tungsten electrode, the tack weld weld length guarantees that at 13mm the distance between two tack welds is 120mm.
(4) weld seam bottoming welding adopts not preheating of tungsten polar helium arc to dose
Monel welding wire welding method, wherein, the content ratio scope of nickel and copper is 65%: 35%, and welding parameter is: welding current is 200A, and protective gas is pure helium, and its flow is 14L/min, the tungsten electrode diameter
In the welding process, electric arc is pointed to heat conduction ratio red copper one side faster, utilize electric arc edge heat that mild steel is melted, it is overheated to prevent, and reduce bath temperature by dosing the monel welding wire, and improve the weld seam setting temperature, intensity, plasticity, prevent crackle and pore; And, electric arc is stopped slightly in joint mother metal red copper one side, and does not stop, to guarantee that root of joint fusion is good and to realize appearance of weld in austenitic stainless steel one side.
(5) after backing run welded, employing not preheating of tungsten polar helium arc was also dosed
Weld seam is filled in the welding of monel welding wire, and the monel welding wire that welding is selected for use, protective gas, standard parameter weld identical with the weld seam bottoming.
Embodiment 3
Thick-wall red copper and austenitic stainless steel welding, its method and step are as follows:
(1) thick-wall red copper to be welded and austenitic stainless steel member connecting portion are processed into " V " shape groove.
(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 adopts tungsten polar helium arc to dose
The welding of monel welding wire, wherein, the content ratio scope of nickel and copper is 70%: 30% by weight percentage, and welding current is 400A, and protective gas adopts pure helium, and flow is 15L/min, adopts diameter
Tungsten electrode, the tack weld weld length guarantees that at 15mm the distance between two tack welds is 150mm.
(4) weld seam bottoming welding adopts not preheating of tungsten polar helium arc to dose
Monel welding wire welding method, wherein, the content ratio scope of nickel and copper is 70%: 30%, and welding parameter is: welding current is 400A, and protective gas is pure helium, and its flow is 15L/min, the tungsten electrode diameter
In the welding process, electric arc is pointed to heat conduction ratio red copper one side faster, utilize electric arc edge heat that mild steel is melted, it is overheated to prevent, and reduce bath temperature by dosing the monel welding wire, and improve the weld seam setting temperature, intensity, plasticity, prevent crackle and pore; And, electric arc is stopped slightly in joint mother metal red copper one side, and does not stop, to guarantee that root of joint fusion is good and to realize appearance of weld in austenitic stainless steel one side.
(5) after backing run welded, employing not preheating of tungsten polar helium arc was also dosed
Weld seam is filled in the welding of monel welding wire, and monel welding wire, protective gas and the standard parameter that welding is selected for use is identical with weld seam bottoming welding.
Claims (1)
1, thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method, be to adopt the direct current source of welding current of output current greater than 400A, with the tungsten polar helium arc method of pure helium, before welding, to finish following preorder work: thick-wall red copper to be welded and austenitic stainless steel member connecting portion are processed into " V " shape groove 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, adopt tungsten polar helium arc to dose
The welding of monel welding wire, welding current 180～400A, protective gas are pure helium, and flow is 10～15L/min, and the tungsten electrode diameter adopts
Tack weld length is 10～15mm, and the distance between two tack welds is 100～150mm;
2), weld seam bottoming welding, adopt not preheating of tungsten polar helium arc to dose
The welding of monel welding wire, the monel welding wire of selecting for use, the content ratio scope of nickel and copper is 60～70%: 40～30% by weight percentage; Welding parameter is: welding current 180～400A, protective gas are pure helium, flow 10～15L/min, and the tungsten electrode diameter is
In the welding process, electric arc is pointed to heat conduction ratio red copper one side faster, utilize electric arc edge heat that austenitic stainless steel is melted, it is overheated to prevent, and reduce bath temperature by dosing the monel welding wire, and electric arc stops slightly in joint mother metal red copper one side, and does not stop in austenitic stainless steel one side;
3), after backing run welds, can adopt tungsten polar helium arc and dose
Weld seam is filled in the not pre-thermal weld of monel welding wire, and monel welding wire, protective gas and the welding variables that welding is selected for use is identical with weld seam bottoming welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100124189A CN101323044A (en) | 2008-07-22 | 2008-07-22 | Thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method |
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| CNA2008100124189A CN101323044A (en) | 2008-07-22 | 2008-07-22 | Thick-wall red copper and austenitic stainless steel non-prewarming arc melting and welding method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962543A (en) * | 2012-11-01 | 2013-03-13 | 中国石油天然气股份有限公司 | Welding process for red copper and stainless steel dissimilar materials |
| CN103801805A (en) * | 2014-01-21 | 2014-05-21 | 马鞍山马钢设备安装工程有限公司 | Sleeve welding repair method in blast-furnace tuyere |
| CN104439646A (en) * | 2014-10-30 | 2015-03-25 | 诸暨斯贝达机械有限公司 | Method for welding copper and steel and application thereof |
| CN109262120A (en) * | 2018-11-21 | 2019-01-25 | 江苏科技大学 | A kind of plasma arc welding (PAW) method and device of not preheated weld thin plate tin bronze |
| CN111958091A (en) * | 2020-08-04 | 2020-11-20 | 新疆八一钢铁股份有限公司 | Welding method for welding copper cooling wall without preheating |
| CN114871533A (en) * | 2022-04-22 | 2022-08-09 | 中船澄西(泰州)装备科技有限公司 | Welding test method for S30408 austenitic stainless steel pressure vessel |
| CN115121907A (en) * | 2022-07-26 | 2022-09-30 | 南京工程学院 | Method for improving austenite content in duplex stainless steel weld joint |
| RU2794085C1 (en) * | 2022-09-29 | 2023-04-11 | Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение" | Method for automatic fusion welding of heterogeneous nickel alloys |
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2008
- 2008-07-22 CN CNA2008100124189A patent/CN101323044A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962543B (en) * | 2012-11-01 | 2015-06-03 | 中国石油天然气股份有限公司 | Welding process for red copper and stainless steel dissimilar materials |
| CN102962543A (en) * | 2012-11-01 | 2013-03-13 | 中国石油天然气股份有限公司 | Welding process for red copper and stainless steel dissimilar materials |
| CN103801805A (en) * | 2014-01-21 | 2014-05-21 | 马鞍山马钢设备安装工程有限公司 | Sleeve welding repair method in blast-furnace tuyere |
| CN103801805B (en) * | 2014-01-21 | 2016-01-20 | 马鞍山马钢设备安装工程有限公司 | A kind of tuyere medium jacket of blast furnace welding repair method |
| CN104439646A (en) * | 2014-10-30 | 2015-03-25 | 诸暨斯贝达机械有限公司 | Method for welding copper and steel and application thereof |
| CN109262120B (en) * | 2018-11-21 | 2021-10-08 | 江苏科技大学 | Plasma arc welding method and device for welding thin tin bronze without preheating |
| CN109262120A (en) * | 2018-11-21 | 2019-01-25 | 江苏科技大学 | A kind of plasma arc welding (PAW) method and device of not preheated weld thin plate tin bronze |
| CN111958091A (en) * | 2020-08-04 | 2020-11-20 | 新疆八一钢铁股份有限公司 | Welding method for welding copper cooling wall without preheating |
| CN114871533A (en) * | 2022-04-22 | 2022-08-09 | 中船澄西(泰州)装备科技有限公司 | Welding test method for S30408 austenitic stainless steel pressure vessel |
| CN114871533B (en) * | 2022-04-22 | 2023-08-29 | 中船澄西(泰州)装备科技有限公司 | Welding test method of S30508 austenitic stainless steel pressure vessel |
| CN115121907A (en) * | 2022-07-26 | 2022-09-30 | 南京工程学院 | Method for improving austenite content in duplex stainless steel weld joint |
| CN115121907B (en) * | 2022-07-26 | 2023-12-22 | 南京工程学院 | Method for improving austenite content in duplex stainless steel welding line |
| RU2794085C1 (en) * | 2022-09-29 | 2023-04-11 | Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение" | Method for automatic fusion welding of heterogeneous nickel alloys |
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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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Effective date of registration: 20100816 Address after: 125000 Huludao City, Liaoning province Longgang District Jinhu Road No. 132 Applicant after: Bohai Shipyard Group Co., Ltd. Address before: 125000 Huludao City, Liaoning province Longgang District Jinhu Road No. 132 Applicant before: Bohai Ship Heavy Industry Co., Ltd. |
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Open date: 20081217 |