CN104191073A - Temperature tube and steam tube welding method - Google Patents
Temperature tube and steam tube welding method Download PDFInfo
- Publication number
- CN104191073A CN104191073A CN201410460618.6A CN201410460618A CN104191073A CN 104191073 A CN104191073 A CN 104191073A CN 201410460618 A CN201410460618 A CN 201410460618A CN 104191073 A CN104191073 A CN 104191073A
- Authority
- CN
- China
- Prior art keywords
- welding
- pipe
- temperature
- steam pipe
- steam
- 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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major constituent
-
- 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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a temperature tube and steam tube welding method. The method is characterized by including the steps that first, high-chrome-nickel austenitic stainless steel welding wires or nickel base welding wires are selected as welding materials; second, the welding materials in the first step are used for forming transition layers on the parent material side of a steam tube in an overlaying mode, and the number of the transition layers is at least five; third, the welding center of the steam tube and the welding center of a temperature tube are found, and the temperature tube and the steam tube are welded together with the welding materials in the first step through electric welding. The selected welding materials meet the parent material requirement of the steam tube, the linear expansion coefficient of welding seam materials is between the linear expansion coefficient of a material of the temperature tube and the linear expansion coefficient of a material of the steam tube, and therefore the requirement for the heat crack resistance of welding joint metal and the requirement for the high-temperature performance of welded joints can be met.
Description
Technical field
The present invention relates to a kind of steel welding technology field, relate in particular to the welding method of a kind of temperature pipe and steam pipe.
Background technology
In the boiler that power plant is used, conventionally can select to elect the material of temperature pipe as 1Cr18Ni9Ti, elect steam pipe material as A335P91.This be because: 1Cr18Ni9Ti contains titanium, makes steel have higher acidresistant property, in some organic acid and inorganic acid of variable concentrations, different temperatures, especially in oxide isolation, has good decay resistance; In A335P91, containing P91 steel is widely used in thermal power generation system as high temperature load bearing component, especially as important temperature pressure-containing members such as main steam pipe road, high temperature reheating pipe roads, and A335P91 has good impact flexibility, stable rupture ductility, good non-oxidizability and heat resistance, and good resistance to high temperature corrosion performance.
Above-mentioned 1Cr18Ni9Ti belongs to Austenitic and does not repair acid resisting steel, and this steel, after Overheating Treatment (1050～1100 DEG C are quenched in water or in air), are single-phase austenite structure; A335P91 belongs to martensite heat-resistant steel, and institutional framework is tempered martensite.Because chemical composition and the metallographic structure of this bi-material exist very large difference, and Physical Properties Difference is also larger.While solving martensite and austenite welding in prior art, common solution is to adopt TGS-9cb, or adopt TIG0Cr18Ni9T welding wire.
But inventor finds, using existing welding method to have a lot of technical problems: 1, the linear expansion coefficient of martensite steel and austenitic steel is different, soldered parts can be subject to the impact of thermal cycle in welding process, at fused face, place produces higher thermal stress, and this high temperature stress easily causes interface formation weld crack; 2, in welding process, by mechanical mixture and liquid state diffusion, alloying element is dissolved, there is the diffusive migration of carbon (C) in fusion area, forms decarburized layer and carburetting layer, makes this district's creep resisting ability, creep rupture strength and plasticity etc.; 3, the each region of welding point, because chemical composition is different with metallographic structure, plasticity and hardness toughness are also different, make residual stress distribution inhomogeneous, easily produce fatigue crack under thermal cycle effect.
Summary of the invention
In order to solve the problems of the technologies described above, to the invention provides one can welding effect good, and there is no the temperature pipe of weld crack and the welding method of steam pipe.
Technical scheme provided by the invention is:
A welding method for temperature pipe and steam pipe, is characterized in that, comprising: one, select high chromiumnickel austenite stainless steel welding wire or nickel-based welding wire as welding material; Two, the welding material built-up welding transition zone in the mother metal side use step 1 of steam pipe, and transition zone at least comprises five layers; Three, find the welding center of steam pipe and temperature pipe, by the welding material of electric welding in step 1, temperature pipe and steam pipe are welded together.
Preferably, also comprise the cleaning to temperature pipe and steam pipe before step 2, wherein, after cleaning, temperature pipe and steam pipe can expose metallic luster.
Preferably, before step 2, also comprise the mechanical processing steps to temperature pipe; The mechanical processing steps of steam pipe is comprised the opening of steam pipe is processed into and has a unlimited opening, and unlimited opening comprises an inclined-plane tilting with temperature tubular axis line.
Preferably, above-mentioned opening also comprise one with the inwall of temperature tubular axis line parallel, the gap between inwall and temperature pipe is 1mm; The angle of inclined-plane and temperature tubular axis line is 35 DEG C.
Preferably, above-mentioned welding material is Inconel 82 welding wires, and described Inconel 82 welding wires comprise that mass component is 67% Ni, 0.1% C, 3.0% Mn, 2.5% Nb, 0.5% Si, 0.25% Cu, 20% Cr, 0.75% Ti, 0.02% S and P.
Preferably, the welding manner of step 3 kind is GTAW; And weldingvoltage scope is 20～25V, welding current is straight polarity direct current, and size of current is 80～90A, and speed of welding is 60～80mm/min.
Preferably, in the welding manner of step 3, ground floor speed of welding is 60mm/min, and second layer speed of welding is 80mm/min.
Preferably, the thickness of above-mentioned at least five transition zones is all 2～3mm.
Adopt above-mentioned preferred technical scheme, the welding material of selection meets the mother metal demand of steam pipe, and the linear expansion coefficient of weld material is between temperature pipe and steam pipe linear expansion coefficient; So can meet the high-temperature behavior of heat crack resistance and the welding point of weld metal; And adopt welding material built-up welding transition zone on the mother metal of steam pipe, can prevent the migration of carbon in welding process; The welding material of above-mentioned employing, properties can meet the requirement of associated welds standard, can ensure the safe operation of equipment.
Brief description of the drawings
The flow chart of a kind of temperature pipe that Fig. 1 provides for the embodiment of the present invention and the welding method of steam pipe;
A kind of temperature pipe that Fig. 2 provides for the embodiment of the present invention and the partial structurtes schematic diagram of steam pipe;
Partial schematic diagram after a kind of temperature pipe that Fig. 3 embodiment of the present invention provides and steam pipe welding.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, it should be noted that, these specific descriptions just allow those of ordinary skill in the art are more prone to, the clear the present invention of understanding, but not limitation of the invention interpretation.
Embodiment
As shown in Figure 1, preferably, the present embodiment provides the welding method of a kind of temperature pipe and steam pipe, comprising:
S1, selects welding material:
Select high chromiumnickel austenite stainless steel welding wire or nickel-based welding wire as welding material.
S2, built-up welding transition zone:
At the welding material built-up welding transition zone in step 1 for mother metal side of steam pipe, and transition zone at least comprises five layers.
S3, formally welding:
Find the welding center of steam pipe and temperature pipe, by the welding material of electric welding in step 1, temperature pipe and steam pipe are welded together.
Preferably, above-mentioned welding material is Inconel 82 welding wires, and described Inconel 82 welding wires comprise that mass component is 67% Ni, 0.1% C, 3.0% Mn, 2.5% Nb, 0.5% Si, 0.25% Cu, 20% Cr, 0.75% Ti, 0.02% S and P.And, the difference of the physical property of various materials: the thermal coefficient of expansion of martensite steel and austenitic steel is different, 20 DEG C～600 DEG C: the linear expansion coefficient of austenitic steel is 18.5 × 10-6m/ DEG C, the linear expansion coefficient of martensite steel is 12.6 × 10-6/ DEG C; And Inconel 82 welding wires 20 DEG C of 16 × 10-6m/ DEG C of linear expansion coefficient.So, can meet the high-temperature behavior of heat crack resistance and the welding point of weld metal.
Preferably, before S2, also comprise the cleaning to temperature pipe and steam pipe, particularly, weldment group to front should by groove face and near the cleaning such as oil, paint, rust, dirt of the 20 millimeters of inside and outside walls in mother metal both sides dirty clean, until send metallic luster.Wherein, after cleaning, temperature pipe and steam pipe can expose metallic luster.
As shown in Figure 2, preferably, before S2, also comprise the mechanical processing steps to temperature pipe; The mechanical processing steps of steam pipe 1 is comprised the opening of steam pipe 1 is processed into and has a unlimited opening, and unlimited opening comprises an inclined-plane 4 tilting with temperature pipe 2 axis.Opening also comprises an inwall 5 parallel with temperature pipe 2 axis, and the gap between inwall 5 and temperature pipe 2 is 1mm; Inclined-plane 4 is 35 DEG C with the angle of temperature tubular axis line.Wherein, steam pipe wall thickness is H1, and the height of inwall 5 on temperature pipe 2 axis directions is H0, and H0 is 10mm.As shown in Figure 2 and Figure 3, the height that forms leg 3 in steam pipe 1 outside is H2, and H2<H1.
Preferably, in step S3, welding manner is GTAW; And weldingvoltage scope is 20～25V, welding current is straight polarity direct current, and size of current is 80～90A, and speed of welding is 60～80mm/min; Preferably, in the welding manner of step 3, ground floor speed of welding is 60mm/min, and second layer speed of welding is 80mm/min; Preferably, the thickness of above-mentioned at least five transition zones is all 2～3mm.More concrete is as shown in table 1:
Table 1. level is fixed welding condition
Simultaneously, in step S3, the excursion of the penetration ratio of argon tungsten-arc welding is very large, it can be between 10-100%, in the time not using packing material, penetration ratio can reach 100%, when formal welding, will adopt less welding conditions, strictly controls sweating heat input quantity, reduce fusion ratio, welding is will pay special attention to and the fusion situation of P91 side mother metal.Temperature >=300 DEG C between controlling every layer.Adopt multi-layer multi-pass welding process, ensure the fusion situation between welding bead, avoid forming interlayer and do not melt and defect; Face of weld and mother metal are wanted rounding off.
Preferably, after step S3, also comprise checking procedure.Wherein, checkout procedure can be according to " thermal power plant solder technology code " DL/T 869-2012 evaluation, and welding point visual examination is qualified; According to " bearing device Non-Destructive Testing " JB/T4730-2005, surperficial excessive defect is not found in angle welding PT flaw detection.
After adopting above-mentioned preferred technical scheme, can there is following beneficial effect: the welding point cracking resistance 1, forming is good.2, technology stability, good reliability.3, Weld Performance meets elevated temperature strength and hot operation operating mode needs.
Finally it should be noted that, above-mentioned explanation is only most preferred embodiment of the present invention, not the present invention is done to any pro forma restriction.Any those of ordinary skill in the art; do not departing within the scope of technical solution of the present invention; all can utilize way and the technology contents of above-mentioned announcement to make many possible variations and simple replacement etc. to technical solution of the present invention, these all belong to the scope of technical solution of the present invention protection.
Claims (8)
1. a welding method for temperature pipe and steam pipe, is characterized in that, comprising:
One, select high chromiumnickel austenite stainless steel welding wire or nickel-based welding wire as welding material;
Two, at the welding material built-up welding transition zone described in the mother metal side use step 1 of steam pipe, and transition zone at least comprises five layers;
Three, find the welding center of steam pipe and temperature pipe, by the welding material of electric welding described in step 1, described temperature pipe and described steam pipe are welded together.
2. the welding method of temperature pipe as claimed in claim 1 and steam pipe, it is characterized in that, before step 2, also comprise the cleaning to described temperature pipe and described steam pipe, wherein, after cleaning, described temperature pipe and described steam pipe can expose metallic luster.
3. the welding method of temperature pipe as claimed in claim 1 and steam pipe, is characterized in that, also comprises the mechanical processing steps to described temperature pipe before step 2; The mechanical processing steps of described steam pipe is comprised the opening of described steam pipe is processed into and has a unlimited opening, and unlimited opening comprises an inclined-plane tilting with described temperature tubular axis line.
4. the welding method of temperature pipe as claimed in claim 3 and steam pipe, is characterized in that, described opening also comprise one with the inwall of described temperature tubular axis line parallel, the gap between described inwall and described temperature pipe is 1mm; The angle of described inclined-plane and described temperature tubular axis line is 35 DEG C.
5. the welding method of temperature pipe as claimed in claim 1 and steam pipe, it is characterized in that, described welding material is Inconel 82 welding wires, and described Inconel 82 welding wires comprise that mass component is 67% Ni, 0.1% C, 3.0% Mn, 2.5% Nb, 0.5% Si, 0.25% Cu, 20% Cr, 0.75% Ti, 0.02% S and P.
6. the welding method of temperature pipe as claimed in claim 1 and steam pipe, is characterized in that, the welding manner of described step 3 kind is GTAW; And weldingvoltage scope is 20～25V, welding current is straight polarity direct current, and size of current is 80～90A, and speed of welding is 60～80mm/min.
7. the welding method of temperature pipe as claimed in claim 6 and steam pipe, is characterized in that, in described welding manner, ground floor speed of welding is 60mm/min, and second layer speed of welding is 80mm/min.
8. the welding method of temperature pipe as claimed in claim 1 and steam pipe, is characterized in that, the thickness of described at least five transition zones is all 2～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460618.6A CN104191073A (en) | 2014-09-11 | 2014-09-11 | Temperature tube and steam tube welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460618.6A CN104191073A (en) | 2014-09-11 | 2014-09-11 | Temperature tube and steam tube welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104191073A true CN104191073A (en) | 2014-12-10 |
Family
ID=52076520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410460618.6A Pending CN104191073A (en) | 2014-09-11 | 2014-09-11 | Temperature tube and steam tube welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104191073A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247181A (en) * | 2018-01-24 | 2018-07-06 | 兰州西固热电有限责任公司 | A kind of 0Cr18Ni11Nb and 10Cr9Mo1VNb dissimilar steel welding technologies |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445044A (en) * | 2003-04-17 | 2003-10-01 | 哈尔滨工业大学 | Method for red copper transition welding without preheating metal alloy |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| CN102528349A (en) * | 2012-01-17 | 2012-07-04 | 山东电力研究院 | Method for positioning center of pipe hole during crack repair of pipe hole on pressure pipeline or header of boiler |
| CN102773581A (en) * | 2012-08-10 | 2012-11-14 | 安徽应流机电股份有限公司 | Welding process of pearlite heat-resistant steel and ordinary carbon steel |
| CN102837107A (en) * | 2012-07-30 | 2012-12-26 | 南京汽轮电机集团泰兴宁兴机械有限公司 | Welding technology for pipe head of 300MW and above high-voltage heater |
| CN103447668A (en) * | 2013-08-27 | 2013-12-18 | 中国船舶重工集团公司第七二五研究所 | Welding method for dispersion copper |
-
2014
- 2014-09-11 CN CN201410460618.6A patent/CN104191073A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445044A (en) * | 2003-04-17 | 2003-10-01 | 哈尔滨工业大学 | Method for red copper transition welding without preheating metal alloy |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| CN102528349A (en) * | 2012-01-17 | 2012-07-04 | 山东电力研究院 | Method for positioning center of pipe hole during crack repair of pipe hole on pressure pipeline or header of boiler |
| CN102837107A (en) * | 2012-07-30 | 2012-12-26 | 南京汽轮电机集团泰兴宁兴机械有限公司 | Welding technology for pipe head of 300MW and above high-voltage heater |
| CN102773581A (en) * | 2012-08-10 | 2012-11-14 | 安徽应流机电股份有限公司 | Welding process of pearlite heat-resistant steel and ordinary carbon steel |
| CN103447668A (en) * | 2013-08-27 | 2013-12-18 | 中国船舶重工集团公司第七二五研究所 | Welding method for dispersion copper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247181A (en) * | 2018-01-24 | 2018-07-06 | 兰州西固热电有限责任公司 | A kind of 0Cr18Ni11Nb and 10Cr9Mo1VNb dissimilar steel welding technologies |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104858555A (en) | Pressure pipeline welding process | |
| CN103273176A (en) | Welding method for T91 steel and 1Crl8Ni9Ti dissimilar steel | |
| CN104759743A (en) | Argon arc welding technological method for nickel base alloy tubes | |
| Das et al. | Selection of filler wire for and effect of auto tempering on the mechanical properties of dissimilar metal joint between 403 and 304L (N) stainless steels | |
| CN105728908A (en) | Field welding method of domestic A335 P91 high-pressure thick-wall pipe | |
| CN101623790A (en) | Welding method of cupronickel weldment | |
| CN109317789A (en) | The welding method of heat exchanger built-up welding tube sheet and T91 heat exchanger tube | |
| EP2687311A1 (en) | Welding structure and welding method | |
| CN109865955B (en) | Welding method combining manual tungsten electrode argon arc welding and shielded metal arc welding for G115 large-diameter pipe | |
| CN103357993B (en) | A kind of welding procedure of 12Cr1MoV and 12X18H12T dissimilar steel | |
| CN104174979A (en) | Welding method for temperature pipe and reheat cooling section pipe | |
| CN102363239A (en) | Automatic narrow-gap submerged arc welding process for all-welded fixed ball valve with medium and large calibers | |
| CN102729009A (en) | Process for manufacturing metallurgical composite pipe elbow | |
| CN107598332B (en) | Novel CB2 heat-resistant steel medium-large diameter pipeline welding and heat treatment process | |
| CN105057844A (en) | Welding repair method for cracks on furnace shell of blast furnace | |
| CN104070271B (en) | 15Cr1Mo1V valve body and WB36 pipe arrangement different steel weld method | |
| Ma et al. | Failure analysis on circulating water pump of duplex stainless steel in 1000 MW ultra-supercritical thermal power unit | |
| CN104191074A (en) | Heterogeneous austenite system steel welding method | |
| CN102974917B (en) | Stellite alloy bead weld method of gas turbine combustion chamber | |
| CN104191073A (en) | Temperature tube and steam tube welding method | |
| CN111774692A (en) | Large-barrel-cladding nickel-based surfacing process | |
| CN107309527A (en) | The Large Heat Input Welding technique of marine engineering large thick steel plate under a kind of low temperature | |
| CN104227196A (en) | Welding method of temperature pipe and reheating heat section pipe | |
| CN105127557B (en) | The medicine core gas shielded arc welding Rework Technics of marine engineering large thick steel plate under low temperature environment | |
| CN201483165U (en) | 2.25 Cr-1Mo steel butt-joint welding structure with low welding residual stress |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20141210 |