CN108453349A - Stainless tube welding method - Google Patents
Stainless tube welding method Download PDFInfo
- Publication number
- CN108453349A CN108453349A CN201810159114.9A CN201810159114A CN108453349A CN 108453349 A CN108453349 A CN 108453349A CN 201810159114 A CN201810159114 A CN 201810159114A CN 108453349 A CN108453349 A CN 108453349A
- Authority
- CN
- China
- Prior art keywords
- welding
- groove
- capping layer
- filled layer
- stainless
- 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.)
- Granted
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
- B23K9/16—Arc welding or cutting making use of shielding gas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Stainless tube welding method is welded using stainless flux-cored wire using pipe circumference direction as welding direction, welding process includes the following steps for being welded between the stainless steel pipes with groove：Prime coat welds, and the method for combining interior silk filling using argon arc welding, welding gun is moved along welding direction in groove in a manner of being swung laterally between groove both sides, forms prime coat；It is subsequently filled layer welding, using gas shield welding method, welding gun is moved along welding direction in groove in a manner of being swung laterally between groove both sides, forms filled layer；Then capping layer welds, and using gas shield welding method, welding gun is moved along welding direction in groove in a manner of being swung laterally between groove both sides, forms capping layer.The present invention uses stainless flux-cored wire, completes prime coat welding using argon arc welding, applying argon gas, reduction argon gas do not waste back of weld.Filled layer and capping layer use gas shielded arc welding, reduce the welding point of filled layer and capping layer.
Description
Technical field
The present invention relates to welding technology fields, specifically, being related to a kind of stainless tube welding method.
Background technology
In the prior art, the weld job of stainless steel pipes is carried out using solid core stainless steel welding stick (i.e. no medicine core), is led to
It is often the welding of prime coat to be carried out using argon arc welding method, and welding region oxygen is prevented in back of weld (i.e. in pipeline) applying argon gas
Change.And filled layer and capping layer then take the welding gimmick of stick electrode, due to welding rod limited length, cause welding point more,
It is also easy to generate weld defect, such as stomata and slag inclusion.In some cases, stomata can be very intensive, and slag inclusion may be strip
Slag inclusion.Prevent weld seam from aoxidizing using argon gas, in gas chamber, argon gas and air are in admixture, and back of weld is more or less
There is the possibility of oxidation and burning, and burning and oxidation can all reduce the toughness and plasticity of weld seam, this can reduce the use of weld seam
The time limit substantially reduces the quality assurance of weld seam.Also, it is influenced by many welding surroundings, such as high-altitude, narrow environment space
Etc. unfavorable factors, argon gas usage amount and wastage are all very big, and the wastage of argon gas is even up to 70%.
Invention content
In order to solve the above problem, the present invention provides a kind of stainless tube welding method, for the stainless of groove
It welds, is welded using pipe circumference direction as welding direction using stainless flux-cored wire, welding process packet between steel conduit
Include following steps：Prime coat welds, and the method for combining interior silk filling using argon arc welding, welding gun between groove both sides to swing laterally
Mode moved in groove along welding direction, formed prime coat；It is subsequently filled layer welding, using CO2Gas shield welding method,
Welding gun is moved along welding direction in groove in a manner of being swung laterally between groove both sides, is formed on the prime coat
Filled layer；Then capping layer welds, using CO2Gas shield welding method, welding gun between groove both sides in a manner of swinging laterally
It is moved in groove along welding direction, forms capping layer on the filled layer.
Preferably, the angle of groove is within the scope of 59~61 degree.
Preferably, in prime coat welding, the reinforcement of back of weld is uniformly and no more than 0.5 ㎜.
Preferably, in filled layer welding, the angle of welding gun and welding direction is within the scope of 90 °~100 °.
Preferably, in filled layer, the welding of capping layer, after striking, the preceding time swung laterally three times gradually successively decreases.
Preferably, in filled layer, the welding of capping layer, by three times along the gradual incremental transverse direction of welding direction forward travel distance
It swings to complete to receive arc.
Preferably, in filled layer, the welding of capping layer, each section of weld seam end forms the slope continuously decreased, in favor of
Overlapping splice is round and smooth smooth.
Preferably, by the slow horizontal swing gimmick in intermediate fast both sides, filled layer weld seam is made to form concave shaped.
Preferably, when capping layer welds, welding gun is arranged along the radial direction of pipeline.
Preferably, when capping layer welds, the displacement distance for swinging laterally welding gun every time along welding direction is not more than 0.5
㎜。
In order to ensure welding quality, the waste of argon gas is reduced, the present invention uses stainless flux-cored wire, using argon arc welding method
Complete prime coat welding, back of weld can not applying argon gas can reduce argon gas waste and only in weld seam front applying argon gas.Filling
Layer and capping layer all use CO2Gas shielded welding reduces the welding point of filled layer and capping layer, can reduce weld defect production
It is raw.
Description of the drawings
By the way that embodiment is described in conjunction with following accompanying drawings, features described above of the invention and technological merit will become
More understands and be readily appreciated that.
Fig. 1 is the axial sectional view for the stainless steel pipes weld seam position for indicating the embodiment of the present invention；
Fig. 2 is the schematic diagram to fill silk in the stainless steel pipes for indicating the embodiment of the present invention；
Fig. 3 is the schematic diagram of the prime coat for the stainless steel pipes for indicating the embodiment of the present invention；
Fig. 4 is the schematic diagram of the filled layer for the stainless steel pipes for indicating the embodiment of the present invention；
Fig. 5 is the schematic diagram of the capping layer for the stainless steel pipes for indicating the embodiment of the present invention；
Fig. 6 is the position view of the welding gun for the stainless steel pipes for indicating the embodiment of the present invention.
Specific implementation mode
The embodiment of stainless tube welding method of the present invention described below with reference to the accompanying drawings.This field it is general
Logical technical staff will recognize, without departing from the spirit and scope of the present invention, can use a variety of different modes
Or combinations thereof described embodiment is modified.Therefore, attached drawing and description are regarded as illustrative in nature, rather than are used for
Limit scope of the claims.In addition, in the present specification, attached drawing is drawn not in scale, and identical reference numeral
Indicate identical part.
Fig. 1 is the axial sectional view of stainless steel pipes weld seam position, and Fig. 2 is the docking schematic diagram of stainless steel pipes.From Fig. 2
In as can be seen that in the end of pipeline 10 offer chamfering 101, chamfering 201 is equally offered in the end of pipeline 20, in pipeline
10 and pipeline 20 end docking after formed welding groove.Wherein, the end face of pipeline 10 and pipeline 20 is not bonded, but is had
There is certain gap 30.As shown in Figure 1, being welded with the prime coat C being circumferentially formed thereon successively from the bottom to top in groove, filling out
Layer B and capping layer A are filled, the weld seam along pipe circumference direction is formed, to which the pipeline 10 of both sides and pipeline 20 be welded as a whole.
The present embodiment is all made of stainless flux-cored wire to prime coat C, filled layer B and capping layer A.Stainless flux-cored wire refers to welding wire
Core has chemicals.Wherein, prime coat welding is carried out using argon arc welding.And using the wire feed gimmick of interior silk filling.Filling
Layer B and capping layer A uses CO2Gas shielded welding.Hereinafter, welding side is in the direction constantly formed with weld seam on circumferencial direction
To that is, welding direction is along pipe circumference direction.To be front on the outside of pipeline, with, for the back side, welding gun is along welding side in pipeline
To mobile for advance.
Fig. 3 to Fig. 5 is the schematic diagram of each layer weld seam.The welding method is described in detail with reference to Fig. 3 to Fig. 5.First,
Carry out the welding of prime coat C.There is gap 30, and using the welding method that fills silk between pipeline 10 and the end face of pipeline 20.Due to filling out outside
The method of silk is susceptible to uneven Deng weld defects in back of weld, so the present embodiment uses interior silk filling method.Such as figure
2, shown in Fig. 3, the end of stainless flux-cored wire 40 is placed in the back side (i.e. in pipeline at groove) of base material at groove, i.e.,
Interior silk filling.Due to using stainless flux-cored wire, compared with original simple stainless steel welding stick, metal is few, so melt au
Belong to loading to reduce, and be wrapped in the thawing of the medicine core in welding wire and produce medicine core solution, the liquid gold of thawing can be protected completely
Belong to not oxidation by air, therefore, applying argon gas is not needed (i.e. in pipeline) in back of weld, and the only weld argon filling outside pipeline
Gas.Also, using the method for interior silk filling, back of weld width and reinforcement uniformity, back of weld can be kept round and smooth full.
Welding gun is mobile along welding direction (i.e. the circumferencial direction of pipeline), also, while welding gun is moved along welding direction, along weld seam
Width direction swings back and forth between groove both sides and (swings laterally), carries out weld job.Welding gun repeat groove both sides it
Between along weld width direction swing, formed prime coat.
Then, as shown in figure 4, being filled the welding of layer.Using stainless flux-cored wire, CO2Gas shielded welding.
Any position striking at groove.As shown in fig. 6, welding gun 50 has angle with weld seam in same cross section, and with welding direction
β.Welding gun 50 is mobile along welding direction (i.e. the circumferencial direction of pipeline), also, while being moved along welding direction, along weld seam
Width direction swung laterally between groove both sides, carry out weld job.
As shown in figure 5, capping layer welding is finally carried out, using stainless flux-cored wire, CO2Gas shielded welding.Welding gun
With weld seam in same cross section, and it is arranged along the radial direction of pipeline.Welding gun along welding direction while moving, along the width of weld seam
Degree direction is swung laterally between groove both sides, carries out weld job.
The stainless tube welding method of the present embodiment uses stainless flux-cored wire, is sequentially completed prime coat, filled layer
With the welding of capping layer.To prime coat by the way of interior silk filling, back of weld width and reinforcement uniform one can be not only kept
It causes, back of weld is round and smooth full, and can protect and melt liquid metal not oxidation by air.It, can due to not applying argon gas in pipeline
To reduce the welding preparation working time, and the sealing material of sealing pipeline can be saved, such as sealed paper and adhesive tape and filled
Gas component.
In one alternate embodiment, in prime coat welding, using high-frequency arc strike method striking, high-frequency arc strike method is to utilize
The high-frequency and high-voltage that high-frequency generator generates punctures the gas gap between tungsten electrode and workpiece and the electric arc that ignites, tungsten electrode are not directly contacted with
Base material and molten bath, in order to avoid form tungsten clip slag.
In one alternate embodiment, in prime coat welding, when the either side of torch swinging to groove when one section of pause
Between, such as pause 1 second, welding gun is swung laterally each time and moves a distance, such as 1 ㎜ to welding direction, it is ensured that groove is good
Fusion.Welding wire, which is sent into speed and melts speed, keeps uniformity, and ensures that welding wire is in always under argon gas protection, in order to avoid not
Rust steel flux-cored wire end influences welding quality by oxidation.
In one alternate embodiment, in prime coat welding, blow-out is using decaying blow-out method, and metallic solution is answered when blow-out
Arc crater is filled up, the defects of pre- anti-shrinkage stomata etc..
Bevel angle increase can increase weld interval and material, and weld seam contracting and toughness is made to reduce.In an optional implementation
In example, the angle [alpha] of groove is within the scope of 59~61 degree.In addition, in the case where bevel angle cannot change, weldering can also be increased
Gap, but the thickness of each welding layer must reduce by 1/4 amount, and speed of welding slows down, it is necessary to interlayer temperature is strictly controlled, no
It obtains more than 150 degree.
In one alternate embodiment, in prime coat welding, the reinforcement of back of weld is uniformly and no more than 0.5 ㎜.
In one alternate embodiment, when filled layer welds, the angle β of welding gun and welding direction is in 90 °~100 ° models
In enclosing.
In one alternate embodiment, when filled layer and capping layer weld, after striking, the preceding time swung laterally three times
Gradually successively decrease, such as respectively 3,2,1 seconds.Also, horizontal swing forward travel distance is not more than 1 ㎜ each time.
In one alternate embodiment, when filled layer and capping layer weld, three steps of arc point are received, i.e., by three times along welding
Direction forward travel distance gradually complete to receive arc by incremental horizontal swing.For example, the distance for swinging laterally advance three times be respectively 1,
2、3㎜。
In one alternate embodiment, each section of weld seam end forms the slope continuously decreased, so that overlapping splice is justified
Cunning is smooth.
In one alternate embodiment, layer thickness is filled by control to keep filled layer appearance of weld beautiful.For example, logical
Cross control speed of welding, make welding gun among groove quickly through, alternatively, keep welding gun longer in the groove both sides residence time,
Bath temperature can be changed, filled layer weld seam is made to form slight concave, be conducive to the welding of capping layer.
In one alternate embodiment, when capping layer welds, welding gun is arranged along the radial direction of pipeline.
In one alternate embodiment, when capping layer welds, welding gun is not more than 0.5 along the displacement distance of welding direction
㎜。
The present invention uses stainless flux-cored wire, and the method for combining interior silk filling using argon arc welding uses argon on the outside of pipeline
Gas shielded weld seam is not oxidized, and oxidation of the air to weld seam is prevented in the liquid that insides of pipes is melted using medicine core.Due to pipe
Not applying argon gas in road, it is possible to reduce the welding preparation time, and the sealing material of sealing pipeline, such as sealed paper can be saved
With adhesive tape and pneumatic element.Using the continuous wire feed of welding wire, the connector that stick electrode welding generates is reduced.And speed of welding is promoted.
The welding method reduces labor intensity, improves welding efficiency.X-ray detection qualification rate reaches 98.9%.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of stainless tube welding method, for being welded between the stainless steel pipes with groove, which is characterized in that make
It is welded using pipe circumference direction as welding direction with stainless flux-cored wire, welding process includes the following steps：
Prime coat welds, and the method for combining interior silk filling using argon arc welding, welding gun between groove both sides in a manner of swinging laterally
It is moved in groove along welding direction, forms prime coat；Then
Filled layer welds, using CO2Gas shield welding method, welding gun between groove both sides in a manner of swinging laterally along welding
Direction is moved in groove, and filled layer is formed on the prime coat；Then
Capping layer welds, using CO2Gas shield welding method, welding gun between groove both sides in a manner of swinging laterally along welding
Direction is moved in groove, and capping layer is formed on the filled layer.
2. stainless tube welding method according to claim 1, which is characterized in that the angle of groove is in 59~61 degree of models
In enclosing.
3. stainless tube welding method according to claim 1, which is characterized in that in prime coat welding, the weld seam back of the body
The reinforcement in face is uniformly and no more than 0.5 ㎜.
4. stainless tube welding method according to claim 1, which is characterized in that filled layer welding in, welding gun with
The angle of welding direction is within the scope of 90 °~100 °.
5. stainless tube welding method according to claim 1, which is characterized in that in filled layer, the welding of capping layer,
After striking, the preceding time swung laterally three times gradually successively decreases.
6. stainless tube welding method according to claim 1, which is characterized in that in filled layer, the welding of capping layer,
By the way that along welding direction forward travel distance, gradually incremental horizontal swing is completed to receive arc three times.
7. stainless tube welding method according to claim 1, which is characterized in that in filled layer, the welding of capping layer,
Each section of weld seam end forms the slope continuously decreased, so that overlapping splice is round and smooth smooth.
8. stainless tube welding method according to claim 1, which is characterized in that pass through the slow transverse direction in intermediate fast both sides
Gimmick is swung, filled layer weld seam is made to form concave shaped.
9. stainless tube welding method according to claim 1, which is characterized in that when capping layer welds, welding gun edge
The radial setting of pipeline.
10. stainless tube welding method according to claim 1, which is characterized in that horizontal every time when capping layer welds
It is not more than 0.5 ㎜ to displacement distance of the welding gun along welding direction is swung.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159114.9A CN108453349B (en) | 2018-02-26 | 2018-02-26 | Stainless steel pipeline welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159114.9A CN108453349B (en) | 2018-02-26 | 2018-02-26 | Stainless steel pipeline welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108453349A true CN108453349A (en) | 2018-08-28 |
| CN108453349B CN108453349B (en) | 2020-06-30 |
Family
ID=63217443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810159114.9A Active CN108453349B (en) | 2018-02-26 | 2018-02-26 | Stainless steel pipeline welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108453349B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922481A (en) * | 2020-07-29 | 2020-11-13 | 石家庄焊晖科技有限公司 | Automatic welding method for large pipeline |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386101A (en) * | 2008-10-09 | 2009-03-18 | 浙江省火电建设公司 | Handwork tungsten electrode argon-arc welding swinging rolling welding method |
| CN103894705A (en) * | 2014-04-09 | 2014-07-02 | 深圳市泰克尼林科技发展有限公司 | Austenitic stainless steel pipeline welding process |
| CN104907673A (en) * | 2015-06-30 | 2015-09-16 | 湖北省建工工业设备安装有限公司 | Installation method of outdoor carbon steel oxygen transferring pipeline |
-
2018
- 2018-02-26 CN CN201810159114.9A patent/CN108453349B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386101A (en) * | 2008-10-09 | 2009-03-18 | 浙江省火电建设公司 | Handwork tungsten electrode argon-arc welding swinging rolling welding method |
| CN103894705A (en) * | 2014-04-09 | 2014-07-02 | 深圳市泰克尼林科技发展有限公司 | Austenitic stainless steel pipeline welding process |
| CN104907673A (en) * | 2015-06-30 | 2015-09-16 | 湖北省建工工业设备安装有限公司 | Installation method of outdoor carbon steel oxygen transferring pipeline |
Non-Patent Citations (2)
| Title |
|---|
| 唐建方: "不锈钢厚壁大管的水平固定全位置焊接", 《建筑》 * |
| 杨钢等: "不锈钢管道背面免充氩自保护钨极氩弧焊药芯焊丝的研制", 《金属加工(热加工)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922481A (en) * | 2020-07-29 | 2020-11-13 | 石家庄焊晖科技有限公司 | Automatic welding method for large pipeline |
| CN111922481B (en) * | 2020-07-29 | 2022-04-12 | 石家庄焊晖科技有限公司 | Automatic welding method for large pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108453349B (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100504296B1 (en) | Method of welding | |
| US9808876B2 (en) | Stainless steel weldment and pad combined welding method | |
| CN103624378B (en) | Pipeline Hot Wire TIG Welding connects method | |
| PT1736270E (en) | Tig welding/brazing method with liquid bridge metal transfer | |
| CN106270933A (en) | A kind of complex welding method of large aperture pipe end built-up welding corrosion resistant alloy composite steel tube | |
| CN102814575B (en) | Deep-groove narrow-gap manual argon arc sealing welding method | |
| US20130082036A1 (en) | Electrode for gmaw hybrid laser arc welding | |
| CN111730177B (en) | Low-dilution-rate double-filler-wire TIG surfacing process and application thereof | |
| CN108453349A (en) | Stainless tube welding method | |
| US20120018405A1 (en) | Protective gas tube and contact tube of a device for improved narrow-gap welding | |
| CN108856984A (en) | Stainless tube welding method | |
| US20150239058A1 (en) | Method and apparatus for metal shield-gas welding | |
| KR102178729B1 (en) | Method for welding steel material | |
| US9006611B2 (en) | Manual welding electrode | |
| CN105195866B (en) | A kind of full-automatic root bead method of the pipe end of composite bimetal pipe | |
| KR20010040001A (en) | Process and unit for the mig welding of aluminum and its alloys | |
| CN106825877A (en) | stainless steel square tube welding process | |
| CN105983760A (en) | Steel tube head welding process | |
| US6884963B1 (en) | Apparatus and method for welding duplex stainless steel | |
| CA2382461C (en) | Apparatus and method for welding duplex stainless steel | |
| CN108406047A (en) | It is a kind of to be used to solve the automatic soldering method irregular to weld clearance | |
| KR20120097929A (en) | Tig welding machine | |
| KR100879163B1 (en) | Method for welding arc of gas tungsten using flux | |
| EP0824987A1 (en) | Plasma welding process | |
| JPH0353068B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |