CN106735768A - Nuclear power station two phase stainless steel gas metal-arc welding technique - Google Patents
Nuclear power station two phase stainless steel gas metal-arc welding technique Download PDFInfo
- Publication number
- CN106735768A CN106735768A CN201510822153.9A CN201510822153A CN106735768A CN 106735768 A CN106735768 A CN 106735768A CN 201510822153 A CN201510822153 A CN 201510822153A CN 106735768 A CN106735768 A CN 106735768A
- Authority
- CN
- China
- Prior art keywords
- welding
- stainless steel
- groove
- phase stainless
- nuclear power
- 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.)
- Pending
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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
It is an object of the invention to provide a kind of nuclear power station two phase stainless steel gas metal-arc welding technique, with the influence of the exclusion human factor welding quality of limits.It is by two-phase stainless steel workpiece group pair and spot welding; then welding groove is welded again; it is by the use of the electric arc produced between welding wire and two-phase stainless steel workpiece as thermal source; base metals are melted; and using welding wire as filling metal and electrode, binary gas are protective gas, by the automatic welding walking mechanism for arranging welding equipment; substitution welder directly manipulates the work of welding gun, and it comprises the following steps：The welding condition of welding equipment is set, the welding groove to the joint carries out bottoming welding；Regulation welding condition, welding is filled to the welding groove；Regulation welding condition, cover welding is carried out to the welding groove.
Description
Technical field
The present invention relates to the welding procedure in nuclear power station field, more particularly to a kind of two phase stainless steel consumable electrode gas-arc
Automatic welding process.
Background technology
Two phase stainless steel is the duplex structure of ferrite and austenite, and its intensity is high, good toughness, corrosion resistance strong,
Have a good application prospect.Two phase stainless steel A240 S32101 first Applications in nuclear power field, at present its
Using manual Welding, appearance of weld is not attractive in appearance enough, and welding efficiency is low, and labour intensity is big, butt welding cost for welding
The technical ability dependence of body is strong.
The content of the invention
It is an object of the invention to provide a kind of nuclear power station two phase stainless steel gas metal-arc welding technique, with the day of one's doom
The influence of the exclusion human factor welding quality of degree.
A kind of nuclear power station two phase stainless steel gas metal-arc welding technique, it is by two-phase stainless steel workpiece group pair and point
Weldering, then welds to welding groove again, and it is made using the electric arc produced between welding wire and two-phase stainless steel workpiece
It is thermal source, base metals is melted, and using welding wire as filling metal and electrode, binary gas are protection
Gas, by arranging the automatic welding walking mechanism of welding equipment, substitution welder directly manipulates the work of welding gun, its bag
Include following steps：
The welding condition of welding equipment is set, the welding groove to the joint carries out bottoming welding；
Regulation welding condition, welding is filled to the welding groove；
Regulation welding condition, cover welding is carried out to the welding groove.
In preferred embodiment, the mother metal is two phase stainless steel A240 (S32101).
In preferred embodiment, the welding wire is flux-cored wire E2209T1-4.
In preferred embodiment, the protective gas is percent by volume 75%Ar+25%CO2Mixed gas.
In preferred embodiment, the welding condition includes weldingvoltage, inductance coefficent, wire feed rate, weldering
Connect speed, and torch swinging speed, the stationary point residence time, weave mode, amplitude of fluctuation, angle of welding gun and
Torch neck to workpiece vertical range.
In preferred embodiment, the welding condition for every layer of the per pass welding of bottoming welding includes electricity
Stream 90-150A, inductance coefficent 40-66, voltage 23-26.5V, speed of welding 5.9-32cm/min, wire feed speed
Degree 190-250in/min, 165-200 weeks/min of swing speed, torch swinging residence time：The left 0.1-0.5S of groove,
0-0.2S in groove, the right 0.1-0.5S of groove.
In preferred embodiment, the welding condition for every layer of the per pass welding of the filling welding includes electricity
Stream 110-175A, inductance coefficent 35-70, voltage 23-26.5V, speed of welding 6.3-32cm/min, wire feed speed
Degree 175-250in/min, 160-195 weeks/min of swing speed, torch swinging residence time：The left 0.2-0.5S of groove,
0-0.2S in groove, the right 0.3-0.5S of groove.
In preferred embodiment, the welding condition for every layer of the per pass welding of the cover welding includes electricity
Stream 100-160A, inductance coefficent 25-60, voltage 22-28V, speed of welding 6.3-32cm/min, wire feed speed
Degree 155-250in/min, 175-195 weeks/min of swing speed, torch swinging residence time：The left 0.2-0.4S of groove,
0.1-0.2S in groove, the right 0.2-0.4S of groove.
The present invention proposes the operating process of specification, is conducive to the shadow of the exclusion human factor welding quality of limits
Ring, then also automatic welding can be realized by means of automatic welding walking mechanism on the basis of this, obtaining excellent welding point matter
On the premise of amount, the high efficiency of welding is realized, low cost reduces the dependence to welder's level of skill, is follow-up
Technical foundation is established in growing continuously and fast for related industry.
Brief description of the drawings
The above and other features of the present invention, property and advantage will pass through with reference to the accompanying drawings and examples
Describe and become readily apparent from, wherein：
Fig. 1 is the flow chart of nuclear power station two phase stainless steel gas metal-arc welding technique in one embodiment of the invention.
Specific embodiment
With reference to specific embodiments and the drawings, the invention will be further described, elaborates in the following description more
Many details are in order to fully understand the present invention, but the present invention obviously can be with various other described different from this
Mode is implemented, and those skilled in the art can be in the case of without prejudice to intension of the present invention according to practical situations
Make similar popularization, deduce, therefore should not be limited the scope of the invention with the content of this specific embodiment.
Two phase stainless steel gas metal-arc welding technique of the invention can be a kind of achievable high efficiency weldering
The automatic welding technology for connecing, this is to including contact surface and welding slope into its junction portion by workpiece group first
Mouthful, the technique carries out spot welding first, forms weld seam at welding groove on the basis of spot welding, and it utilizes welding wire and work
The electric arc produced between part melts base metals as thermal source, and using welding wire as filling metal and electrode,
Binary gas are protective gas, and by arranging automatic welding walking mechanism, substitution welder directly manipulates the work of welding gun,
To realize the welding procedure of the automatic welding of two phase stainless steel.
Its welding equipment can be selected but is not limited to as follows：
The source of welding current (contains supporting wire-feed motor)；
Automatic welding equipment：Wig-wag, control box, automatic welding carriage, bidentate track.
Welding base metal：Two phase stainless steel A240 S32101
The wlding of welding：Flux-cored wire E2209T1-4；
Protective gas in welding process：75%Ar+25%CO2Mixed gas.
As shown in figure 1, two phase stainless steel gas metal-arc welding technique of the invention is first to workpiece group
To spot welding, during spot welding, when using pad, control backing plate is brought into close contact with mother metal, mother metal and backing plate
Gap width is advisable no more than 2in.
Then, welding equipment is in place, to being welded at welding groove.The source of welding current, automatic welding row are checked before weldering
Walk whether mechanism can normally use；By moving track and automatic welding carriage, to ensure the walking of automatic welding carriage
Path is parallel with weld seam, it is to avoid the straight line variation of track and weld seam；For continuous weld seam long, a plurality of bidentate can be used
Track is spliced, it is ensured that weld seam is continuously welded；Adjustment torch swinging amplitude, enables welding wire to be rocked to mother metal groove
Place；Welding gun line peripheral region clear is checked before weldering, and construction area sets up warning elt around, to avoid shadow
Ring the normal swing of welding gun.
Then, welding condition is set, the parameter of bottoming welding is now carried out according to optimal welding condition
Setting work.Optimal bottoming is as shown in table 1 below with welding condition.
The bottoming welding condition table of table 1
Next, starting bottoming welding, in bottoming welding, pendulum model swing is belonged to because welding gun head swings,
In bottoming welding process, by controlling the swing width of pipette tips, welding arc is set fully to melt mother metal and backing plate,
Fuse the root of weld good.
Then, welding condition is adjusted again, after bottoming welding is completed, due to the increase of welding bead face width,
Therefore increase torch swinging amplitude, and welding wire is ensured during swing, left and right stationary point controls molten in weld seam respectively
In zygonema.With the increase of welding bead face width, control pipette tips that can be appropriate are stopped in middle stationary point, it is to avoid
Incomplete fusion defect in weld seam layer, now optimal filling welding condition is shown in Table 2.
Welding condition table is used in the filling of table 2
And then, welding is filled, when welding job is filled, in welding process, can be according to reality
Situation fine adjustment each welding condition.Using speed of welding faster, to reduce single-pass welding thickness, reduce
Thermal weld stress, is conducive to controlling welding deformation.
Then, welding condition and is adjusted again, because welding bead face width continues to increase, therefore continues to increase
Big torch swinging amplitude, and welding wire is ensured during swing, left and right stationary point controls in weld-fusion line respectively
On.With the increase of welding bead face width, control pipette tips that can be appropriate are stopped in middle stationary point, it is to avoid weld seam
The optimal capping welding condition of incomplete fusion defect is shown in Table 3 in layer.
The capping welding condition table of table 3
Then cover welding is carried out, when cover welding work is carried out, in welding process, can be according to actual conditions
Fine adjustment each welding condition, using speed of welding faster, to reduce single-pass welding thickness, reduces welding
Heat input, is conducive to controlling welding deformation.
In addition, bidentate track can as needed be set to rigid track and flexible rail mode.Rigid track mode is logical
Cross and increase gusset at orbital plane back and the mode that track adsorbs leg is set, to meet the welding requirements of straight bead；
Flexible rail mode is by way of increasing track absorption leg at orbital plane back, to meet the welding of arc-shaped welding seam
It is required that.
According to the invention effect of previous embodiment：
(1) the excellent weld seam of availability, and face of weld beautiful appearance；
(2) uninterrupted welding operation is capable of achieving, operating efficiency is improved, the welding procedure cycle has been ensured, so as to reach
To the purpose of cost efficiency；
(3) welder is adjusted welding by automatic welding walking mechanism, instead of the work that welder directly manipulates welding gun
Make, it is possible to decrease the dependence to welder's level of skill.
In the once practice of inventor, it is cold that Welding of the invention has applied to nuclear power passive containment
But in water tank module in the middle of the welding procedure of two phase stainless steel A240 S32101.Set using the source of welding current in welding
Standby (matching somebody with somebody wire-feed motor), wig-wag, control box, automatic welding carriage, bidentate track；Wlding selects flux-cored wire
E2209T1-4；Protective gas selects 75%Ar+25%CO2Mixed gas；And use the bilateral double V-groove of one side
Pattern.Then weld job is carried out according to following flow：
(1) when group to point is welded, the gap between backing plate and mother metal is less than 2in；
(2) check whether the source of welding current, automatic welding walking mechanism can normally use, adjustment automatic welding carriage
Walking path is parallel with weld seam, adjusts torch swinging amplitude；
(3) magnitude of voltage is set for 23.7V, wire feed rate 207in/min on the source of welding current and wire-feed motor in advance,
Speed of welding 6.8cm/min is set in control box, and 167 weeks/min of swing speed, inductance coefficent 44% is left
The middle right residence time is respectively 0.4,0.1,0.4, regulation angle of welding gun and torch neck to welding piece it is vertical
After distance, start weld seam bottoming welding job；
(4) after the completion of weld seam bottoming welding, because weld width is increased, amplitude of fluctuation is adjusted on wig-wag,
So that welding wire is swingable at mother metal bevelled edge, it is ensured that the fusion of mother metal, and increase speed of welding extremely
7.5cm/min, the left and right residence time is adjusted to 0.3s, 0.3s respectively, starts weld seam filling welding job；
(5) after the completion of weld seam filling welding, amplitude of fluctuation is adjusted on wig-wag, and increase speed of welding extremely
8.5cm/min, starts weld cap welding job.
The disposable qualification rate of all weld seams reaches 100%, fully achieves two phase stainless steel A240 S32101
Automatic welding and quality of weld joint is excellent.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore,
Every content without departing from technical solution of the present invention, according to appointing that technical spirit of the invention is made to above example
What modification, equivalent variations and modification, each falls within the protection domain that the claims in the present invention are defined.
Claims (8)
1. nuclear power station two phase stainless steel gas metal-arc welding technique, it is characterised in that by two phase stainless steel work
Part group pair and spot welding, then weld to welding groove again, and it is to utilize produced between welding wire and two-phase stainless steel workpiece
Raw electric arc melts base metals as thermal source, and using welding wire as filling metal and electrode, binary is mixed
Conjunction gas is protective gas, and by arranging the automatic welding walking mechanism of welding equipment, substitution welder directly manipulates welding gun
Work, it comprises the following steps：
The welding condition of welding equipment is set, the welding groove to the joint carries out bottoming welding；
Regulation welding condition, welding is filled to the welding groove；
Regulation welding condition, cover welding is carried out to the welding groove.
2. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 1, its feature exists
In the mother metal is two phase stainless steel A240S32101.
3. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 2, its feature exists
In the welding wire is flux-cored wire E2209T1-4.
4. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 3, its feature exists
In the protective gas is percent by volume 75%Ar+25%CO2Mixed gas.
5. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 1, its feature exists
In the welding condition includes weldingvoltage, inductance coefficent, wire feed rate, speed of welding, and welding gun
Swing speed, stationary point residence time, weave mode, amplitude of fluctuation, angle of welding gun and torch neck are to workpiece
Vertical range.
6. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 4, its feature exists
In the welding condition for every layer of the per pass welding of bottoming welding includes electric current 90-150A, inductance
Coefficient 40-66%, voltage 23-26.5V, speed of welding 5.9-32cm/min, wire feed rate 190-250in/min,
165-200 weeks/min of swing speed, torch swinging residence time：Groove left 0.1-0.5S, 0-0.2S in groove,
The right 0.1-0.5S of groove.
7. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 4, its feature exists
In the welding condition for every layer of the per pass welding of the filling welding includes electric current 110-175A, electricity
Sense coefficient 35-70%, voltage 23-26.5V, speed of welding 6.3-32cm/min, wire feed rate 175-250
In/min, 160-195 weeks/min of swing speed, torch swinging residence time：The left 0.2-0.5S of groove, in groove
0-0.2S, the right 0.3-0.5S of groove.
8. nuclear power station two phase stainless steel gas metal-arc welding technique as claimed in claim 4, its feature exists
In the welding condition for every layer of the per pass welding of the cover welding includes electric current 100-160A, electricity
Sense coefficient 25-60, voltage 22-28V, speed of welding 6.3-32cm/min, wire feed rate 155-250in/min,
175-195 weeks/min of swing speed, torch swinging residence time：Groove left 0.2-0.4S, 0.1-0.2S in groove,
The right 0.2-0.4S of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822153.9A CN106735768A (en) | 2015-11-24 | 2015-11-24 | Nuclear power station two phase stainless steel gas metal-arc welding technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822153.9A CN106735768A (en) | 2015-11-24 | 2015-11-24 | Nuclear power station two phase stainless steel gas metal-arc welding technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106735768A true CN106735768A (en) | 2017-05-31 |
Family
ID=58964542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510822153.9A Pending CN106735768A (en) | 2015-11-24 | 2015-11-24 | Nuclear power station two phase stainless steel gas metal-arc welding technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106735768A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511559A (en) * | 2017-09-06 | 2017-12-26 | 中国核工业华兴建设有限公司 | A kind of nuclear power station two phase stainless steel pond clad can installation method and welding procedure |
| CN108274101A (en) * | 2017-12-20 | 2018-07-13 | 上海亭博分离技术有限公司 | A kind of welding method of super-duplex stainless steel 2507 |
| CN108608093A (en) * | 2018-04-26 | 2018-10-02 | 广船国际有限公司 | A kind of vertical docking automatic soldering method of two phase stainless steel |
| CN109352143A (en) * | 2018-10-29 | 2019-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of stainless steel hot-rolling coil welding method |
| CN111843132A (en) * | 2020-08-07 | 2020-10-30 | 江南造船(集团)有限责任公司 | Submerged arc welding process for 304L stainless steel thick plate |
| CN114669837A (en) * | 2021-12-16 | 2022-06-28 | 山西北方机械制造有限责任公司 | Gas shielded welding process for welding duplex stainless steel test plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462196A (en) * | 2008-12-31 | 2009-06-24 | 重庆大学 | Method and equipment for electromagnetic composite double-face submerged arc welding of diphase stainless steel thick plate |
| CN102019485A (en) * | 2009-09-23 | 2011-04-20 | 宋卫国 | Welding method of duplex stainless steels |
| CN103028818A (en) * | 2011-09-29 | 2013-04-10 | 中航鼎衡造船有限公司 | CO2 gas shielded welding process for marine duplex stainless steel thick plate |
| CN103801807A (en) * | 2014-03-05 | 2014-05-21 | 山东核电设备制造有限公司 | Pulse mixed gas metal arc welding process |
-
2015
- 2015-11-24 CN CN201510822153.9A patent/CN106735768A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462196A (en) * | 2008-12-31 | 2009-06-24 | 重庆大学 | Method and equipment for electromagnetic composite double-face submerged arc welding of diphase stainless steel thick plate |
| CN102019485A (en) * | 2009-09-23 | 2011-04-20 | 宋卫国 | Welding method of duplex stainless steels |
| CN103028818A (en) * | 2011-09-29 | 2013-04-10 | 中航鼎衡造船有限公司 | CO2 gas shielded welding process for marine duplex stainless steel thick plate |
| CN103801807A (en) * | 2014-03-05 | 2014-05-21 | 山东核电设备制造有限公司 | Pulse mixed gas metal arc welding process |
Non-Patent Citations (1)
| Title |
|---|
| 中国机械工程师学会焊接学会: "《焊接手册》", 31 January 2008, 机械工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511559A (en) * | 2017-09-06 | 2017-12-26 | 中国核工业华兴建设有限公司 | A kind of nuclear power station two phase stainless steel pond clad can installation method and welding procedure |
| CN107511559B (en) * | 2017-09-06 | 2020-10-20 | 中国核工业华兴建设有限公司 | Installation method and welding process for double-phase stainless steel pool cover of nuclear power station |
| CN108274101A (en) * | 2017-12-20 | 2018-07-13 | 上海亭博分离技术有限公司 | A kind of welding method of super-duplex stainless steel 2507 |
| CN108608093A (en) * | 2018-04-26 | 2018-10-02 | 广船国际有限公司 | A kind of vertical docking automatic soldering method of two phase stainless steel |
| CN109352143A (en) * | 2018-10-29 | 2019-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of stainless steel hot-rolling coil welding method |
| CN109352143B (en) * | 2018-10-29 | 2021-05-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Stainless steel hot-rolled coil welding method |
| CN111843132A (en) * | 2020-08-07 | 2020-10-30 | 江南造船(集团)有限责任公司 | Submerged arc welding process for 304L stainless steel thick plate |
| CN114669837A (en) * | 2021-12-16 | 2022-06-28 | 山西北方机械制造有限责任公司 | Gas shielded welding process for welding duplex stainless steel test plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106735768A (en) | Nuclear power station two phase stainless steel gas metal-arc welding technique | |
| CN103737158B (en) | A kind of electric arc welding gun with double consumable electrodes and a welding method thereof controlled based on heat input | |
| CN103394796B (en) | The Narrow sloping-glot of steel containment vessel of nuclear power station and automatic soldering method thereof | |
| CN102009251B (en) | Full-position welding method for pipeline by full-automatic external welding machine | |
| CN101687270B (en) | Welding process and welding equipment | |
| CN106862730A (en) | A kind of vertical butt welding method of slab | |
| CN204997223U (en) | Bypass heater plasma arc weld device | |
| CN102699493B (en) | Carbon dioxide (CO2) gas shielded welding vertical downwards welding method for waste heat boiler heat pipe and connecting plate | |
| CN106903401A (en) | Obliquity buried arc welding method | |
| CN105537737A (en) | Narrow gap welding method for vertical weld position of liquified natural gas storage tank | |
| CN108856991A (en) | A kind of fully automatic molten electrode gas shield down hill welding suitable for diversion penstock connects method | |
| CN103692060B (en) | A kind of �� 1.6 solid wire CO2The welding process of shielded welding | |
| CN101564790A (en) | Gas protection welding process for offshore steel structure | |
| CN103817449A (en) | Plasma arc and melt electrode electric arc composite welding method and device | |
| CN101817115B (en) | Lap joint method | |
| CN107921569A (en) | Stand to narrow groove gas-shielded arc welding method | |
| CN109202227A (en) | A kind of effective operating procedure for inhibiting almag TIG weld defect | |
| CN110238492A (en) | A kind of vertical fixing port all positon submerged-arc welding process of pipeline | |
| CN106695065A (en) | T-shaped plate one-side welding pulse bottoming welding method | |
| CN108247183A (en) | A kind of composite welding process | |
| CN111266701A (en) | Arc welding protection process for pipeline | |
| CN108015394A (en) | A kind of stainless steel tube welding method | |
| CN106891081A (en) | A kind of vertical corner connection double-wire automatic welding connects method | |
| CN113857630A (en) | Welding trolley and welding method for ensuring penetration rate of U-shaped ribs of steel bridge deck | |
| CN203765179U (en) | Hybrid welding device with plasma arc mode and consumable electrode electric arc mode |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |