CN109877423A - The 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding - Google Patents
The 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding Download PDFInfo
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- CN109877423A CN109877423A CN201910302650.4A CN201910302650A CN109877423A CN 109877423 A CN109877423 A CN 109877423A CN 201910302650 A CN201910302650 A CN 201910302650A CN 109877423 A CN109877423 A CN 109877423A
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Abstract
A kind of 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding, using following steps: one: 9% nickel steel plate U-shaped groove of processing；Two: completing U-shaped groove group pair；Three: U-shaped groove two sides are polished；Four: backside gas protective device being enabled to be covered on the back side of 9% nickel steel plate U-shaped groove；Then, to argon gas is persistently filled with inside protective gas device, make the back side obtain protecting without aoxidizing in welding, 9% nickel steel plate U-shaped groove is enabled to achieve the effect that single-side welding double-side forming；Five: plate U-shaped groove is welded；Six: when welding to U-shaped groove, back cover and filling are all made of the welding of single layer single track；Capping carries out two pass or single track capping；Seven: postwelding appearance of weld is beautiful, and uniformly, reinforcement is controllable, is not necessarily to grinding process, can carry out subsequent nondestructive testing work.The present invention not only reduces weld seam loading and welding material cost, moreover, also achieving the effect that single-side welding double-side forming, improves welding efficiency.
Description
Technical field
The present invention relates to welding procedure, more particularly to it is a kind of for liquefied natural gas (LNG) storage tank inner canister based on dynamic
9% nickel steel welding procedure of wire feed heated filament argon arc welding.Belong to petroleum works field.
Background technique
Currently, the inner canister of liquefied natural gas (LNG) storage tank is to be spelled by nickeliferous mass fraction amount in 9% or so alloy-steel plate
It connects.Wherein, the horizontal position welding seam between steel plate and steel plate needs to complete by being welded to connect with cross joint, and existing welding
Technique in addition to horizontal position welding is stitched, still completed using more inefficient manual electric arc welding by other weld seams.The welding of this welding method
Quality is not only stronger to welder's level of skill dependence, and welding efficiency is lower；Moreover, because can not be formed single-sided welding it is two-sided at
Therefore type causes the welding oxidation of its back side serious；Simultaneously as needing a large amount of back chippings, polishing, lead to integral solder low efficiency.
Summary of the invention
It is a primary object of the present invention to overcome disadvantages mentioned above of the existing technology, and provide a kind of based on dynamic wire feed
9% nickel steel welding procedure of heated filament argon arc welding, use U-shaped groove to nickeliferous mass fraction amount 9% or so steel alloy into
Row welding not only solves nickeliferous mass fraction amount the problem of 9% or so steel alloy welds backside oxide, thus, reach
The effect of single-side welding double-side forming；Moreover, greatly reducing thermal weld stress, property of welded joint and quality are improved；And
Back gouging is eliminated, working procedure is simplified, comprehensive improves welding efficiency.
The purpose of the present invention is implemented by the following technical solutions:
A kind of 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding, it is characterised in that: walked using following welding
It is rapid:
Step 1: 9% nickel steel plate is completed the machining of U-shaped groove according to U-shaped groove size and required precision；
Step 2: 9% nickel steel plate is required completion group pair to size according to U-shaped groove group, and control plate U-shaped slope
The unfitness of butt joint of mouth and the gap of U-shaped groove；
Step 3: carrying out being polishing to light in 9% nickel steel plate U-shaped groove two sides, and remove impurity, iron filings, greasy dirt；
Step 4: when the front of 9% nickel steel plate U-shaped groove of welding, Schilling backside gas protective device covering welding 9%
The back side of nickel steel plate U-shaped groove, and seal；Then, to being persistently filled with protective gas inside the protective gas device of back, to
The backside oxide for preventing 9% nickel steel plate in welding process enables 9% nickel steel plate U-shaped groove reach single-side welding double-side forming
Effect, exempt back gouging process；
Step 5: being welded using the technique of dynamic wire feed heated filament argon arc welding to plate U-shaped groove；
Step 6: back cover and filling are all made of the welding of single layer single track in the U-shaped groove welding to 9% nickel steel plate；Lid
Face carries out two pass or single track capping；
Step 7: the appearance of weld of 9% nickel steel plate of postwelding is beautiful, uniformly；And postwelding reinforcement can control, and not need
Grinding process can carry out subsequent nondestructive testing work.
9% nickel steel plate one side of something bevel angle control is between 5 ° -12 °；9% nickel steel plate group controls gap
Between 0-1mm, misalignment is controlled between 0-2mm.
In the third step, it is polishing within the scope of the 20-25mm for the 9% nickel steel plate U-shaped groove two sides that bright place is.
In 4th step, back protective gas is that argon gas removes back protection device after certain thickness is welded in front,
And according to sheet deformation situation, then to the front of 9% nickel steel plate U-shaped groove carry out welding or the back side carry out polishing or repair welding at
Reason.
In 6th step, when being welded to the U-shaped groove of 9% nickel steel plate, dynamic wire feed heated filament argon arc welding technique
Electric source modes be AC or DC power, welding current: in 150-260A range；Voltage: in 8-14V range, speed of welding
Are as follows: 70-210mm/min, heat input are controlled in 2.60kJ/mm or less.Welding protection gas and back-protective gas using purity >=
99.99% argon gas, flow control is in 15-25L/min.
The thickness range of the 9% nickel steel plate is suitable for all position welding of 9% nickel steel plate between 5-40mm
It connects.
Beneficial effects of the present invention: the present invention due to the adoption of the above technical scheme, uses U-shaped groove to nickeliferous quality point
Quantity is welded in 9% or so steel alloy, not only greatly reduces weld seam loading and welding material cost, improves weldering
Connect efficiency；Moreover, using argon gas as backing gas, the steel alloy for solving nickeliferous mass fraction amount 9% or so is welded
The problem of connecing backside oxide, thus, achieve the effect that single-side welding double-side forming；Moreover, greatly reducing thermal weld stress, mention
High property of welded joint and quality；And back gouging is eliminated, simplify working procedure, comprehensive improves welding efficiency.
Detailed description of the invention
Fig. 1 is the U-shaped groove schematic diagram of single side of the present invention.
Fig. 2 is double U-groove schematic diagram of the present invention.
Fig. 3 is downhand position schematic diagram of the present invention.
Fig. 4 is horizontal position schematic diagram of the present invention.
Fig. 5 is vertical position of welding schematic diagram of the present invention.
Fig. 6 is overhead position schematic diagram of the present invention.
Major Symbol illustrates in figure:
1. welding gun, 2.9% nickel steel plate, 3. back protective gas delivery pipes, 4. back protective devices.
Specific embodiment
As shown in figs 1 to 6, the present invention uses following welding step:
Step 1: 9% nickel steel plate 2 is completed the machining of U-shaped groove according to U-shaped groove size and required precision；
The half of bevel angle control of above-mentioned 9% nickel steel plate 2 is between 5 ° -12 °；
Step 2: 9% nickel steel plate 2 is required completion group pair to size according to U-shaped groove group, and control its unfitness of butt joint
And gap of U-shaped groove etc.；
2 groups of above-mentioned 9% nickel steel plate control between 0-1mm gap, and misalignment controls between 0-2mm.
Step 3: carrying out being polishing to light within the scope of 9% nickel steel plate 2U type groove two sides 20-25mm, and remove shadow
Ring impurity, iron filings, the greasy dirt etc. of welding quality；
Step 4: Schilling backside gas protective device 4 is covered when welding the front of 9% nickel steel plate 2U type groove with welding gun 1
The back side of lid 9% nickel steel plate U-shaped groove of welding, and with tinfoil firm pasting, and seal, then, pass through back protective gas
Delivery pipe 3 is that backside gas protective device 4 persistently conveys protective gas, carries out back-protective, can prevent 9% nickel in welding process
The backside oxide of steel board 2 enables 9% nickel steel plate 2U type groove single-sided welding achieve the effect that double-faced forming, and it is clear to exempt the back side
Root process；
Above-mentioned back protective gas is that argon gas removes back protection device, and according to 9% nickel after being welded to certain thickness
The deformation of steel board 2, then front welding or back side process are continued to 9% nickel steel plate 2U type slope；When processing, carry out
Polishing or repair welding；It can also not handle according to circumstances；
Step 5: carrying out U-shaped groove just to 9% nickel steel plate, 2 groove using the technique of dynamic wire feed heated filament argon arc welding
The advantages of face welding, this welding method is: its argon arc welding that can be realized automatic feeding increases heated filament and vibration wire feed function
Can, increase stirring of the welding wire to welding pool；Welding wire crossing efficiency and melting efficiency and weld seam metallurgical performance are improved, together
When, weld defect is reduced, weld is accepted rate is improved；
Step 6: back cover and filling are all made of single layer single-run welding when the U-shaped groove to 9% nickel steel plate 2 welds
It connects；Capping carries out two pass or single track capping；Wherein, dynamic wire feed heated filament argon arc welding machine is carried out using AC or DC power mode
Welding, welding current: in 150-260A range, voltage: in 8-14V range, speed of welding are as follows: 70-210mm/min, heat input
It can be controlled in 2.60kJ/mm or less；Welding protection gas and back-protective gas use the argon gas of purity >=99.99%, flow control
In 15-25L/min；Since 9% nickel steel plate 2U type groove is relatively narrow, when welding, single layer single-run welding is can be used in back cover and filling
It connects；Capping can carry out two pass or single track capping according to groove opening width；Using narrow groove, welds loading and is greatly lowered,
Weld interval reduces, and improves single-pass welding welding efficiency.
Step 7: the U-shaped divided edge molding of 9% nickel steel plate 2 of postwelding is beautiful, uniformly；And postwelding reinforcement is controllable, does not need
Grinding process can carry out subsequent nondestructive testing work.Save a large amount of postwelding polishing work.
The present invention is suitable for the all-position welding of 9% nickel steel plate 2 of the thickness range between 5-40mm.
Above-mentioned back protective device, the technique of dynamic wire feed heated filament argon arc welding are the prior art, and the technology of not specified (NS) is
The prior art, so it will not be repeated.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, it is all
It is any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention, still falls within
In the range of technical solution of the present invention.
Claims (6)
1. a kind of 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding, it is characterised in that: walked using following welding
It is rapid:
Step 1: 9% nickel steel plate is completed the machining of U-shaped groove according to U-shaped groove size and required precision；
Step 2: 9% nickel steel plate is required completion group pair to size according to U-shaped groove group, and control plate U-shaped groove
The gap of unfitness of butt joint and U-shaped groove；
Step 3: carrying out being polishing to light in 9% nickel steel plate U-shaped groove two sides, and remove impurity, iron filings, greasy dirt；
Step 4: when the front of 9% nickel steel plate U-shaped groove of welding, Schilling backside gas protective device covering 9% nickel steel of welding
The back side of plate U-shaped groove, and seal；Then, to protective gas is persistently filled with inside the protective gas device of back, to prevent
The backside oxide of 9% nickel steel plate in welding process enables 9% nickel steel plate U-shaped groove reach the effect of single-side welding double-side forming
Fruit exempts back gouging process；
Step 5: being welded using the technique of dynamic wire feed heated filament argon arc welding to plate U-shaped groove；
Step 6: back cover and filling are all made of the welding of single layer single track in the U-shaped groove welding to 9% nickel steel plate；Capping into
Row two pass or single track capping；
Step 7: the appearance of weld of 9% nickel steel plate of postwelding is beautiful, uniformly；And postwelding reinforcement can control, and not need to polish
Processing, can carry out subsequent nondestructive testing work.
2. the 9% nickel steel welding procedure according to claim 1 based on dynamic wire feed heated filament argon arc welding, it is characterised in that:
9% nickel steel plate one side of something bevel angle control is between 5 ° -12 °；9% nickel steel plate group to gap control 0-1mm it
Between, misalignment controls between 0-2mm.
3. the 9% nickel steel welding procedure according to claim 1 based on dynamic wire feed heated filament argon arc welding, it is characterised in that:
In the third step, it is polishing within the scope of the 20-25mm for the 9% nickel steel plate U-shaped groove two sides that bright place is.
4. the 9% nickel steel welding procedure according to claim 1 based on dynamic wire feed heated filament argon arc welding, it is characterised in that:
In 4th step, back protective gas is that argon gas removes back protection device, and according to plate after certain thickness is welded in front
Material deformation, then to the front of 9% nickel steel plate U-shaped groove carry out welding or the back side carry out polishing or repair welding handle.
5. the 9% nickel steel welding procedure according to claim 1 based on dynamic wire feed heated filament argon arc welding, it is characterised in that:
In 6th step, when being welded to the U-shaped groove of 9% nickel steel plate, the power supply mould of dynamic wire feed heated filament argon arc welding technique
Formula is AC or DC power, welding current: in 150-260A range；Voltage: in 8-14V range, speed of welding are as follows: 70-
210mm/min, heat input are controlled in 2.60kJ/mm or less.Welding protection gas and back-protective gas are using purity >=99.99%
Argon gas, flow control is in 15-25L/min.
6. according to claim 1, the 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding described in 2,3,4 or 5,
Be characterized in that: the thickness range of the 9% nickel steel plate is suitable for all position welding of 9% nickel steel plate between 5-40mm
It connects.
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| CN201910302650.4A CN109877423A (en) | 2019-04-16 | 2019-04-16 | The 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding |
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| CN201910302650.4A CN109877423A (en) | 2019-04-16 | 2019-04-16 | The 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding |
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Cited By (6)
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|---|---|---|---|---|
| CN112247320A (en) * | 2020-10-20 | 2021-01-22 | 上海东鼎钢结构有限公司 | Large-caliber duplex stainless steel butt-joint protection welding device |
| CN113146044A (en) * | 2021-04-19 | 2021-07-23 | 山西奥斯腾科技有限责任公司 | Process for laser welding pipeline and plate joint |
| CN114932296A (en) * | 2022-03-29 | 2022-08-23 | 中国船舶重工集团公司第七二五研究所 | Large-cladding efficient narrow-gap welding method for thick plate titanium alloy based on vibration wire feeding |
| CN115121914A (en) * | 2022-08-31 | 2022-09-30 | 江阴市华昌不锈钢管有限公司 | Processing system for service stainless steel welding wire feeding decision |
| CN115488472A (en) * | 2022-10-10 | 2022-12-20 | 中石化第四建设有限公司 | Method for welding longitudinal seam of inner tank of LNG low-temperature storage tank |
| CN116174864A (en) * | 2022-12-12 | 2023-05-30 | 南京奥特自动化有限公司 | LNG Rapid-TIG vertical welding process |
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| CN115488472A (en) * | 2022-10-10 | 2022-12-20 | 中石化第四建设有限公司 | Method for welding longitudinal seam of inner tank of LNG low-temperature storage tank |
| CN116174864A (en) * | 2022-12-12 | 2023-05-30 | 南京奥特自动化有限公司 | LNG Rapid-TIG vertical welding process |
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