CN1223189A - Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly - Google Patents
Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly Download PDFInfo
- Publication number
- CN1223189A CN1223189A CN 98100129 CN98100129A CN1223189A CN 1223189 A CN1223189 A CN 1223189A CN 98100129 CN98100129 CN 98100129 CN 98100129 A CN98100129 A CN 98100129A CN 1223189 A CN1223189 A CN 1223189A
- Authority
- CN
- China
- Prior art keywords
- welding
- zirconium
- argon
- current
- weld
- 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
Images
Landscapes
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention discloses a pulsed argon arc welding process for Zr-4 alloy thin wall guide tube component, including the steps of cleaning weldment, weld fitting, argon protection for weld portion, and pulsed argon arc welding. It is characterized by that according to the characteristics of weldment, it uses the welding heat energy input to solve the weld interfusion, and utilizes the optimized combination of the parameters of pulse frequency, peak current, base current, duty ratio and welding time in the pulsed argon arc welding process to solve the appearance of weld surface and weld penetration, and uses the argon gas protection mode to solve the weld oxidation. It is good in welding quality, low in cost, can meet the technical requirements for welding large-sized nuclear electric elements.
Description
The present invention relates to a kind of welding procedure of nuclear power station reactor control stick guide pipe, is a kind of zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly specifically.
The purpose of this invention is to provide a kind of weldquality height, zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly that welding cost is low.
The present invention is achieved in that a kind of zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly, and it comprises the steps:
(1) cleaning zirconium 4 zirconium 4 alloy thin-wall guiding pipes, end plug and sleeve pipe;
(2) will clean good zirconium 4 zirconium 4 alloy thin-wall guiding pipes, end plug and sleeve pipe and on corking machine, carry out the assembling of upper and lower end weld seam respectively;
(3) the zirconium 4 zirconium 4 alloy thin-wall guiding pipe assembly weld seams that assemble are placed in the welding cell that is connected with the permanent current argon;
(4) in the welding cell, protect welding zone that zirconium 4 zirconium 4 alloy thin-wall guiding pipe assemblies are carried out pulsed argon arc welding by the welding argon of welding gun nozzle ejection;
Wherein, in step (1), the guide pipe mouth of pipe dips in acetone with silk and cleans, and end plug and sleeve pipe adopt ultrasonic wave to clean; In step (2), control tamponade power is 2300～2350N, makes welding line joint gap≤0.1mm; In step (3), the permanent current argon flow that is fed in the welding cell by welding cell bottom aperture is 5～7L/min, and purity of argon is 99.95%～99.99%, logical argon gas when argon is welded in the ejection of welding gun nozzle till; In step (4), chewing diameter in the welding gun nozzle that adopts is 9mm, chewing diameter outward is 18mm, welding argon flow by the ejection of welding gun nozzle is 23～26L/min, purity of argon is 99.95%～99.99%, the welding argon time that feeds is being played forearc 3 seconds to the blow-out 20 seconds, select tungsten electrode diameter phi=2.0mm for use, its tapering is 30 ° ± 1 °, and die opening is 0.4～0.8mm, inclined to one side end plug in tungsten electrode position or sleeve pipe 0.05mm, the weldingvoltage that uses is 8～9V, the welding current frequency is 24～28Hz, is 55～60A to guide pipe and end plug welding peak point current, and background current is 20～22A, to guide pipe and sleeve pipe welding peak point current is 45～50A, background current is 17～19A, and pulse duty factor is 1: 1, weld interval t
2=7～9 seconds, welding t die-away time
3=3 seconds, at t weld interval
2In, completely be worth t weld interval
1=3～4 seconds, t weld interval slowly decayed
2-t
1=4～5 seconds, decay current was △ I=3～5A, and speed of welding is 6.5mm/s.
The present invention is according to the characteristics of zirconium 4 zirconium 4 alloy thin-wall guiding pipe assemblies; set about from the input of welding heat energy; at first solve thin-wall pipes butt joint ring welding line and be difficult to fusion formation weld seam problem mutually; utilize pulsed argon arc welding then; in pulse frequency; peak point current; background current and dutycycle and weld interval etc., parameter was optimized collocation; appearance of weld and weld penetration problem have been solved; at last from purity of argon; argon shield mode etc. has solved zirconium 4 alloys welding problem of oxidation; experimental study is succeedd; face of weld quality and inherent quality not only satisfy the requirement of large nuclear-power Element Technology fully, and the product percent of pass index also exceeds 4% than predicted value.Remarkable advantage of the present invention is the weldquality height, and welding cost is low, for China's zirconium 4 alloy thin-wall tubing butt joint boxing provides a kind of new process.
Now in conjunction with the accompanying drawings and embodiments the present invention is done specific descriptions:
Fig. 1 is zirconium 4 zirconium 4 alloy thin-wall guiding pipe assembly appearance and size schematic diagrames;
Fig. 2 is the welding current curve synoptic diagram;
Fig. 3 is a welding gun nozzle structural representation;
Fig. 4 is for preventing air-flow reflection unit schematic diagram;
Fig. 5 is the reflector net vertical view.
As shown in Figure 1, zirconium 4 zirconium 4 alloy thin-wall guiding pipe assemblies that the present invention relates to comprise guide pipe 1, sleeve pipe 2 and end plug 3, guide pipe 1 wall thickness 0.35～0.45mm, its two ends internal diameter is respectively φ 11.20mm and φ 14.02mm, boxing is docked with sleeve pipe 2 and end plug 3 respectively in the two ends of guide pipe 1, form the guide pipe parts, its total length is 3899.9mm.
(1) guide pipe, end plug and sleeve pipe are carried out strict cleaning, the guide pipe mouth of pipe dips in acetone with silk and cleans, and end plug and sleeve pipe adopt ultrasonic wave to clean;
(2) will clean good guide pipe, end plug and sleeve pipe and carry out the assembling of upper and lower end weld seam respectively on corking machine, control tamponade power is 2300～2350N, makes welding line joint gap≤0.1mm;
(3) with the guide pipe parts welding seam part position that assembles in the welding cell that is connected with the permanent current argon, the permanent current argon flow that is fed cell by cell bottom aperture is 5～7L/min, purity of argon is 99.95%～99.99%, logical argon gas when argon is welded in the ejection of welding gun nozzle till;
(4) in the welding cell, the guide pipe parts are carried out pulsed argon arc welding by welding gun nozzle ejection welding argon protection welding zone; Here, chewing diameter in the welding gun nozzle that adopts is 9mm, chewing diameter outward is 18mm, the welding argon flow of welding gun nozzle ejection is 23～26L/min, purity of argon still is 99.95%～99.99%, the welding argon time that feeds is being played forearc 3 seconds to the blow-out 20 seconds, and the welding argon is that interlocking is controlled with the permanent current argon feeding time.Tungsten electrode diameter phi=2.0mm is selected in pulsed argon arc welding for use, its tapering is 30 ° ± 1 °, die opening is 0.4～0.8mm, inclined to one side end plug in tungsten electrode position or sleeve pipe 0.05mm, weldingvoltage is 8～9V, the welding current frequency is 24～28Hz, to guide pipe and end plug welding peak point current is 55～60A, background current is 20～22A, to guide pipe and sleeve pipe welding peak point current is 45～50A, background current is 17～19A, and guide pipe two ends welding peak point current/background current is 2.5～3.1, and pulse duty factor is 1: 1.Welding current control breaks through conventional control method.As shown in Figure 2, weld interval t
2=7～9 seconds, wherein completely be worth t weld interval
1=3～4 seconds, t weld interval slowly decayed
2-t
1=4～5 seconds, decay current value △ I=3～5A; Welding t die-away time
3=3 seconds.Speed of welding is 6.5mm/s, and rotating speed is 9～10r/min when being equivalent to guide pipe and end plug welding, and rotating speed is 7.5～8.5r/min during to guide pipe and sleeve pipe welding.
Experimental study shows that weld seam does not fuse and shows that mainly light-wall pipe one end in the fusing after-contraction, forms flange, makes it to form weld seam.Its reason is due to the bad and joint of the weldment joint cleannes assembling defective tightness.As excesssive gap, the Metal Contact that the welding of little energy input can make the weld seam both sides be melted does not on a small quantity go up, and can not melt mutually.In addition, in the welding current uphill process, weldment is also rotating, and but rotates because of weldment when electric current is raised to a certain value and can just melts weld seam wedge angle position and shrinks again after making the weld seam cooling cause the minute quantity metal molten, and the play movement is strengthened, and more is difficult to form weld seam.Therefore before carrying out pulsed argon arc welding, at first to carry out the strictness cleaning to the guide pipe parts, guide pipe parts after the cleaning carry out the weld seam assembling on corking machine, make the welding line joint gap as far as possible little, and with the guide pipe parts welding seam part position that assembles in the welding cell that is connected with the permanent current argon, to keep the cleannes at weld seam position.Simultaneously, the slope that makes the welding current ascending curve when welding is 90 degree, makes the very fast fusing overlap joint in weldment both sides, forms weld seam.
Scalelike mark and the inhomogeneous defective of weld seam width may appear in the face of weld of fusing.Producing scalelike mark mainly is to select improper causing because of pulse frequency.Frequency is too high then similar with the direct current welding, is unfavorable for little electric current welding heat energy input control.Adopting pulse frequency through test is 24～28Hz, and welding effect is good, and naked eyes are difficult for finding out the weld seam scalelike mark, and face of weld is smooth.Weld seam width is inhomogeneous then to be because due to the thermal accumlation.If the heat energy that electric arc is produced with same current will make weld seam be heated to melting point metal from room temperature, when beginning to weld, weldment is in cold conditions, and the metal fever conduction is fast, and loses heat is many, thereby it is few to play the solder joint metal molten, weld seam is narrow, rotates weldment more, and the back weld seam is gradually wide.As circular weld being divided into four districts, must be that second district is the narrowest, the 3rd district secondly, the 4th district's broad, first district is because of being overlapping welding zone, weld seam is the wideest.So at t weld interval
2In=7～9 seconds, control the welding current curve, make peak point current after the starting the arc, have one completely to be worth t weld interval
1, be controlled at 3～4 seconds, slowly decay welding then, t weld interval slowly decays
2-t
1Be controlled at 4～5 seconds, the decay current value is controlled at △ I=3～5A, so that the heat that four districts of circular weld are obtained is roughly the same, guarantees that weld seam width is even.Press such welding current curve controlled welded seam width difference only about 0.1mm.
The welding current size directly influences the weld penetration size, and when welding current was too small, not only fusion penetration did not reach requirement, and weld seam does not fuse.Overall heat energy input was too many when but welding current was excessive, and appearance of weld is difficult to guarantee that it is concavo-convex weld seam to occur, and the weld seam oxidation is serious.So determining of welding current must be set about from the energy input, comprises with the collocation of speed of welding and taking all factors into consideration.According to thin-walled zirconium 4 alloy pipe characteristics, selected the pulse welding manner, promptly adopt background current to guarantee the stable of welding arc, improve appearance of weld, background current is too little, and the weld seam fish scale is obvious, background current is too big under the same frequency, then influences the integral energy input too much.Adopt peak point current to cause qualified fusion penetration, form the molten bath, easy shrink flanging problem when overcoming the welding of thin-walled zirconium 4 alloy pipes, through soldering test research relatively, determine following pulse welding basic parameter:
The welding current pulse frequency is 24～28Hz, and wherein, when pulse frequency was 25Hz, welding effect was best.Dutycycle: i.e. the ratio of shared time of shared time of peak point current and background current in a pulse cycle, this ratio is 1: 1; Consider that from appearance of weld and fusion penetration peak point current is 2.5～3.1 with the background current ratio; Corresponding speed of welding is 6.5mm/s.To guide pipe and end plug welding, peak point current is 55～60A, and the base value electricity is 20～22A, and according to caliber, corresponding speed of welding is 9～10r/min.Optimum value, peak point current are 56A, and background current is 22A, and speed of welding is 10r/min.For guide pipe and sleeve pipe welding, peak point current is 45～50A, and background current is 17～19A, is 7.5～8.5r/min according to the corresponding speed of welding of caliber.Optimum value: peak point current is 48A, and the base value electricity is 18A, and speed of welding is 8r/min.
The full-automatic welded tube machine of ZR-4 is adopted in pulsed argon arc welding.Its main performance index: current forms: direct current, pulse; Input capacity: 10KVA; Input voltage 380V, the 50Hz three-phase; Welding current: 0～60A; Pulse frequency: 1～800Hz; Pulse duty factor: 0.1～1; Speed of welding: 2～20r/min; Type of Welding: manual, automatic or full-automatic separately; Current attenuation form: evenly decay, ladder decay or secondary extinction; Weldment diameter: 9-16mm; Production capacity: 30 joints/hour.
The welding oxidation of zirconium 4 alloys also comprises the pollution of gas butt welded seams such as nitrogen, hydrogen except absorbing oxygen, all claim the weld seam oxidation.For preventing the weld seam oxidation, in welding process, adopt argon shield.Purity of argon directly influences the consequence of weld seam oxidation.The purity of argon that adopts among the present invention is 99.95%～99.99%.By the welding argon of welding gun nozzle ejection, its effect one is that ionization forms electric arc; The 2nd, protect red-hot weld seam not to be subjected to harmful gaseous contamination; The 3rd, cool off weld seam after the blow-out.Welding argon flow is 23～26L/min.Mix from the welding argon protective layer of welding gun nozzle ejection for the permanent current argon that prevents to weld the ejection of cell bottom, need the blowdown time of control permanent current argon and welding argon, when promptly the permanent current argon is sprayed onto the ejection of welding argon till, both are mutually from lock control.The welding argon from forearc 3 seconds to blow-out after 20 seconds.The shape and size of welding gun nozzle to the protection weld seam effect clearly; when the nozzle diameter is 9mm; argon gas is better than the heat affected area to the protective effect of fusion zone; and the fusion zone is subjected to the cooling effect of argon gas to be better than the heat affected area, and heat affected area relative fusion zone argon shield and cooling effect are also poor.Therefore, need to strengthen the nozzle diameter, make its diameter change 18mm into, and in nozzle, add peace one argon gas collector ring, as shown in Figure 3.Among Fig. 3,4 is nozzle, and 5 for being positioned on the collector ring in the nozzle 4, and 6 is the tungsten electrode tip.Have vertical hole of uniform φ 2mm on the collector ring 5.Making like this and chewing diameter in the nozzle that is adopted is 9mm, and chewing diameter outward is 18mm.Utilize this nozzle under same weld argon flow, can enlarge the argon shield scope, improve the protective effect and the cooling effect of heat affected area.In addition, consider that the welding argon is reflected in welding cell bottom, also can confuse protective layer, need to increase peace one anti-air-flow reflector net, as shown in Figure 4 and Figure 5 in welding cell bottom.Among Fig. 4 and Fig. 5,4 for adding the nozzle of collector ring, and 8 is workpiece, and 9 are anti-air-flow reflector net, and 10 are welding cell base plate, and 11 for filling permanent current argon aperture.Utilize anti-air-flow reflector net to make the 45 ° of direction reflections behind reflector net of welding argon, form stable protective layer with the welding argon that guarantees ejection along both sides.
In sum, the welding parameter subordinate list 1.
For preventing that weld seam produces inflatable when the welding of guide pipe and end plug, can strengthen welding conditions, weld seam is broadened, air gap is melted in the molten bath, cool off crystallization again, minimum gas is absorbed by metal or forms indivedual admissible pores.Also can in welding process, vacuumize, guarantee negative pressure in the pipe guide pipe inside, make the weld seam molten bath just (outward) to pressurized, elimination molten bath root inflatable defective.Two kinds of methods relatively, it is better to vacuumize effect in the pipe.Be evacuated down to about 8Pa in the guide pipe and get final product.
Utilize welding procedure provided by the present invention, 20 of welding guide pipe and end plugs, 26 of welding guide pipe and sleeve pipes, according to the requirement of large nuclear-power element, assay all meets the technical conditions requirement.Interventions Requested and result are shown in subordinate list 2.The formal batch process in batches is total to 1514 of input orientation duct members, and solder yield is 99.4%.The present invention has not only successfully solved the Welding Problems of production domesticization large nuclear power station fuel assembly guide pipe parts, and provides a kind of new process for the sealing boxing of butt joint boxing of China's zirconium 4 alloy thin-wall tubing and fuel rod.
| Parameter name | Guide pipe and end plug welding | Guide pipe and sleeve pipe welding |
| Electricity level diameter | ????φ2.0mm | ????φ2.0mm |
| The electrode tapering | ????30°±1° | ????30°±1° |
| Die opening | ????0.4～0.8mm | ????0.4～0.8mm |
| Electrode position | Inclined to one side end plug 0.05mm | Inclined to one side end plug 0.05mm |
| The nozzle diameter | In chew φ 9mm; Chew φ 18mm outward | In chew φ 9mm; Chew φ 18mm outward |
| Argon flow amount | Normal flow: 5～7L/min; Weldering flow: 23～26L/min | Normal flow: 5～7L/min; Weldering flow: 23～26L/min |
| Weldingvoltage | ????8～9V | ????8～9V |
| Welding frequency | ????24～28Hz | ????24～28Hz |
| Pulse duty factor | ????1∶1 | ????1∶1 |
| Cool time | ????20Sec | ????20Sec |
| Welding current | Peak value: 55～60A; Base value: 20～22A | Peak value: 45～50A; Base value: 17～19A |
| Speed of welding | ????9～10r/min | ????7.5～8.5r/min |
| Classification | Interventions Requested | Broken sample product quantity | Assay |
| Guide pipe and end plug | The apparent size check | 20 | The seam surface light, 0.11～0.32mm beats in the postwelding end |
| The X-ray transillumination | 20 | 13 qualified, and 7 have slight inflatable (qualified) | |
| Metallographic detects | 8 | Fusion penetration 〉=wall thickness | |
| Corrosion test | 8 | The evenly no abnormal discovery of black oxide film of surface | |
| Guide pipe and sleeve pipe | The apparent size check | 26 | The face of weld light, 0.06～0.24mm beats in the postwelding end |
| Test is stretched in the position | 12 | Fracture Force: 6300N～8550N | |
| | 4 | Fusion penetration 〉=wall | |
| Corrosion test | |||
| 10 | The surface is black oxide film evenly, no abnormal discovery. |
Claims (3)
1. zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly, it comprises the steps:
(1) cleaning zirconium 4 zirconium 4 alloy thin-wall guiding pipes, end plug and sleeve pipe;
(2) will clean good zirconium 4 zirconium 4 alloy thin-wall guiding pipes, end plug and sleeve pipe and on corking machine, carry out the assembling of upper and lower end weld seam respectively;
(3) with the zirconium 4 zirconium 4 alloy thin-wall guiding pipe assembly welding seam part positions that assemble in the welding cell that is connected with the permanent current argon;
(4) in the welding cell, protect welding zone that zirconium 4 zirconium 4 alloy thin-wall guiding pipe assemblies are carried out pulsed argon arc welding by the welding argon of welding gun nozzle ejection,
It is characterized in that: in step (1), the guide pipe mouth of pipe dips in acetone with silk and cleans, and end plug and sleeve pipe adopt ultrasonic wave to clean; In step (2), control tamponade power is 2300～2350N, makes welding line joint gap≤0.1mm; In step (3), the permanent current argon flow that is fed in the welding cell by welding cell bottom aperture is 5～7L/min, and purity of argon is 99.95%～99.99%, logical argon gas when argon is welded in the ejection of welding gun nozzle till; In step (4), adopting and chewing diameter in the welding gun nozzle is 9mm, chewing diameter outward is 18mm, welding argon flow by the ejection of welding gun nozzle is 23～26L/min, purity of argon is 99.95%～99.99%, the welding argon time that feeds is being played forearc 3 seconds to the blow-out 20 seconds, select tungsten electrode diameter phi=2.0mm for use, the tungsten electrode tapering is 30 ° ± 1 °, and die opening is 0.4～0.8mm, inclined to one side end plug in tungsten electrode position or sleeve pipe 0.05mm, the weldingvoltage that uses is 8～9V, the welding current frequency is 24～28Hz, is 55～60A to guide pipe and end plug welding peak point current, and background current is 20～22A, to guide pipe and sleeve pipe welding peak point current is 45～50A, background current is 17～19A, and pulse duty factor is 1: 1, weld interval t
2=7～9 seconds, wherein completely be worth t weld interval
1=3～4 seconds, t weld interval slowly decayed
2-t
1=4～5 seconds, decay current was △ I=3～5A, welding t die-away time
3=3 seconds, speed of welding was 6.5mm/s.
2. according to said a kind of zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly of claim 1, it is characterized in that: when welding guide pipe and end plug, peak point current is 56A, background current is 22A, and corresponding speed of welding is 10r/min, when welding guide pipe and sleeve pipe, peak point current is 48A, background current is 18A, and corresponding speed of welding is 8r/min, and both are 25Hz at used welding current frequency.
3. according to claim 1 or 2 said a kind of zirconium 4 pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly, it is characterized in that: when welding guide pipe and end plug, in step (4), being evacuated down to 8Pa in the guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98100129A CN1087671C (en) | 1998-01-14 | 1998-01-14 | Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98100129A CN1087671C (en) | 1998-01-14 | 1998-01-14 | Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1223189A true CN1223189A (en) | 1999-07-21 |
| CN1087671C CN1087671C (en) | 2002-07-17 |
Family
ID=5215821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98100129A Expired - Fee Related CN1087671C (en) | 1998-01-14 | 1998-01-14 | Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1087671C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825369A (en) * | 2012-09-18 | 2012-12-19 | 吴江市物华五金制品有限公司 | Anti-oxidation argon arc welding method for metal pipelines |
| CN103915121A (en) * | 2013-01-08 | 2014-07-09 | 韩电原子力燃料株式会社 | Plasma welding apparatus for guide thimble and guide thimble end plug of nuclear fuel assembly |
| CN104227191A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Low-back-pressure penetration electric arc welding device and method |
| CN104439618A (en) * | 2014-11-13 | 2015-03-25 | 中国人民解放军第五七一九工厂 | Method for repairing cracks of aircraft engine air inlet casing supporting plate manufactured through superplastic forming |
| CN108127276A (en) * | 2017-12-20 | 2018-06-08 | 鲁西工业装备有限公司 | A kind of welding method of zircaloy pressure vessel |
| CN108778611A (en) * | 2015-11-26 | 2018-11-09 | 由俄罗斯原子能集团公司代表的俄罗斯联邦 | Welding point between fuel element casing and plug |
| CN109530877A (en) * | 2018-12-29 | 2019-03-29 | 中核北方核燃料元件有限公司 | A kind of presurized water reactor annular fuel component guide pipe welder and method |
| CN109719371A (en) * | 2018-12-29 | 2019-05-07 | 中核北方核燃料元件有限公司 | A kind of presurized water reactor annular fuel component separator tube welder and method |
| CN112985236A (en) * | 2019-12-17 | 2021-06-18 | 中核建中核燃料元件有限公司 | Method for rapidly and visually inspecting weld penetration without measuring tool |
| CN114986130A (en) * | 2022-05-23 | 2022-09-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-walled tube and large-chamber container tube joint |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1440643A1 (en) * | 1987-05-08 | 1988-11-30 | Институт Электросварки Им.Е.О.Патона | Method of arc welding of zirconium with titanium |
| JPH03248788A (en) * | 1990-02-22 | 1991-11-06 | Kobe Steel Ltd | Method for welding zirconium alloy structure for nuclear fuel |
| RU2043890C1 (en) * | 1992-09-21 | 1995-09-20 | Производственное объединение "Чепецкий механический завод" | Method for manufacture of products from zirconium and zirconium alloys |
| JP3248788B2 (en) * | 1993-07-16 | 2002-01-21 | 株式会社リコー | Image forming device |
-
1998
- 1998-01-14 CN CN98100129A patent/CN1087671C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825369A (en) * | 2012-09-18 | 2012-12-19 | 吴江市物华五金制品有限公司 | Anti-oxidation argon arc welding method for metal pipelines |
| CN103915121A (en) * | 2013-01-08 | 2014-07-09 | 韩电原子力燃料株式会社 | Plasma welding apparatus for guide thimble and guide thimble end plug of nuclear fuel assembly |
| CN104227191A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Low-back-pressure penetration electric arc welding device and method |
| CN104227191B (en) * | 2014-09-10 | 2016-04-20 | 北京工业大学 | A kind of low back pressure penetrating arc welder and method |
| CN104439618A (en) * | 2014-11-13 | 2015-03-25 | 中国人民解放军第五七一九工厂 | Method for repairing cracks of aircraft engine air inlet casing supporting plate manufactured through superplastic forming |
| CN108778611A (en) * | 2015-11-26 | 2018-11-09 | 由俄罗斯原子能集团公司代表的俄罗斯联邦 | Welding point between fuel element casing and plug |
| CN108127276A (en) * | 2017-12-20 | 2018-06-08 | 鲁西工业装备有限公司 | A kind of welding method of zircaloy pressure vessel |
| CN108127276B (en) * | 2017-12-20 | 2020-11-03 | 鲁西工业装备有限公司 | Welding method of zirconium alloy pressure container |
| CN109530877A (en) * | 2018-12-29 | 2019-03-29 | 中核北方核燃料元件有限公司 | A kind of presurized water reactor annular fuel component guide pipe welder and method |
| CN109719371A (en) * | 2018-12-29 | 2019-05-07 | 中核北方核燃料元件有限公司 | A kind of presurized water reactor annular fuel component separator tube welder and method |
| CN112985236A (en) * | 2019-12-17 | 2021-06-18 | 中核建中核燃料元件有限公司 | Method for rapidly and visually inspecting weld penetration without measuring tool |
| CN114986130A (en) * | 2022-05-23 | 2022-09-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-walled tube and large-chamber container tube joint |
| CN114986130B (en) * | 2022-05-23 | 2024-02-02 | 上海电气核电设备有限公司 | Back gas protection method for butt welding of thin-wall pipe and large-cavity container pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1087671C (en) | 2002-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1087671C (en) | Pulse argon-are welding technology for zirconium 4 alloy thin-wall guiding pipe assembly | |
| US5158740A (en) | Fuel rod end plug welding method | |
| US3725635A (en) | Method of and apparatus for welding an end plug onto a nuclear fuel element | |
| CN107052517B (en) | Automatic butt welding process for low-alloy steel and nickel-based alloy dissimilar steel heat exchange tubes | |
| CN111604594A (en) | Welding process of battery cover plate and battery | |
| CN110328434A (en) | A kind of cold exchange device tube head welding method | |
| CN107052536A (en) | A kind of low-alloy steel heat exchanger tube docking automatic soldering technique without packing material | |
| CN108544061B (en) | Nickel-based eccentric flat steel splicing and arranging welding device and welding process | |
| CN106735895A (en) | A kind of method for laser welding of aluminium alloy glass composite | |
| CN110508909A (en) | Stainless steel tube docks the welding system and method for automatic superimposed pulse single-run welding | |
| CN111069775B (en) | Connecting system and method for heat exchange tube and tube plate | |
| CN211668045U (en) | Double-pipe butt joint structure of solar heat collecting pipe | |
| CN114799752A (en) | Manufacturing method for water collecting pipe in vacuum chamber of Tokamak device | |
| CN113664342A (en) | Process for welding through strength welding joint between heat exchange tube and tube plate of reactor or heat exchanger | |
| CN104227258B (en) | A kind of encapsulating method of cesium beam tube caesium bubble | |
| JP2931667B2 (en) | How to seal fuel rods by welding | |
| Komuro | Welding of zirconium alloys | |
| CN111037063A (en) | Manual seamless deep-melting TIG (tungsten inert gas) welding process for SA-312TP304L stainless steel | |
| CN211680474U (en) | Bent pipe and finned tube welding structure | |
| US3460237A (en) | Method of making a nuclear fuel element | |
| CN218935679U (en) | Internal extrusion coating pipeline repairing device | |
| CN218874040U (en) | Welding device | |
| CN213869977U (en) | Flange cone of flue gas turbine and flue gas turbine | |
| CN217596231U (en) | Seamless tin brass welding wire for welding high-strength steel | |
| CN210731321U (en) | Welding system for stainless steel pipe butt joint automatic superposition pulse single-pass welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020717 Termination date: 20140114 |