CN105689919A - Nickel base alloy welding wire with weld deposit metal capable of being recrystallized - Google Patents
Nickel base alloy welding wire with weld deposit metal capable of being recrystallized Download PDFInfo
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- CN105689919A CN105689919A CN201610230578.5A CN201610230578A CN105689919A CN 105689919 A CN105689919 A CN 105689919A CN 201610230578 A CN201610230578 A CN 201610230578A CN 105689919 A CN105689919 A CN 105689919A
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- 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
-
- 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
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- Arc Welding In General (AREA)
Abstract
The invention belongs to the field of ultra-supercritical power station welding materials and particularly relates to a solution strengthening type nickel base alloy welding wire high in plasticity. The solution strengthening type nickel base alloy welding wire is suitable for welding of ultra-supercritical boiler superheaters/reheater pipes, welding between the superheaters and boiler gas collection headers (including connecting pipe seats) and welding between the reheater pipes and the boiler gas collection headers (including the connecting pipe seats). The solution strengthening type nickel base alloy welding wire is mainly characterized in that after the welding wire is used in welding conducted through TIG welding (argon tungsten-arc welding), weld deposit metal can be recrystallized after being subjected to postweld heat treatment at the temperature of 1000 DEG C or higher, and dendrite and columnar crystal tissue in an original weld is removed; the hardness of a weld area after welding is 300 HV, and the hardness is reduced to 210 HV after recrystallization; and weld residual stress and component segregation are eliminated, and the welding wire is basically consistent with base metal in appearance. The chemical components of the nickel base alloy welding wire include, by weight percent, smaller than 3% of Fe, 14%-18% of Cr, smaller than or equal to 0.45% of Al and Ti, smaller than 0.9% of Ti/Al, 1.0%-1.5% of Nb, 7.0%-9.8% of Mo, smaller than 0.4% of W, smaller than or equal to 1.0% of Si, 0.5%-1.0% of Mn, smaller than or equal to 0.1% of C, 0.003%-0.005% of B, smaller than or equal to 0.03% of Zr, the balance Ni and smaller than 0.1% of the sum of other impurity elements.
Description
Technical field:
The invention belongs to ultra supercritical power station field of welding material, being specifically related to a kind of weld(ing) deposit can the nickel-base alloy bare welding filler metal of recrystallization。
Background technology:
Along with the development of thermal power generating technology, develop 600 DEG C and above ultra-supercritical power generation technology, China is saved the energy, reduction pollutant and CO2 emission there is highly important strategic importance and actual application value。The welding of power station high-temperature material is always up the key technique of power plant construction and production, and steam parameter improve constantly, the alloying level of used high-temperature material improves constantly, and austenitic stainless steel and nickel-base alloy use in a large number so that solder technology difficulty also increases therewith。
Traditional seam organization does not have the chance of controlled rolling and thermomechanical treatment due to deposited metal, is with directive column (branch) crystalline substance can not be derived from refinement；Simultaneously again owing to weld seam rate of cooling is fast, segregation is serious, and Nb, the V etc. in deposited metal are difficult in fine carbide in solidification process, nitride precipitates out, therefore the comprehensive mechanical property of weld seam far away from mother metal and exists anisotropy。Along with the prolongation of welding point active time, weld properties (especially toughness) decay is notable, and service life shortens；Simultaneously because welding residual stress, easily there is stress corrosion (SCC), become the weak link of whole (welding) parts, affect the safe operation in power station。
For such weld seam Problems existing, and in domestic existing wlding system, also find no this type of nickel-base alloy bare welding filler metal, also do not find the technology report being correlated with。The weld(ing) deposit of this welding material had the requirement of following technology: weld(ing) deposit processes through postwelding recrystallization, the column with obvious directivity (branch) crystalline substance in former seam organization is completely reformed into equiax crystal, hardness is dropped to 200～220HV by 290～310HV, farthest eliminate component segregation and welding residual stress simultaneously, make seam organization and mother metal have concordance。
Solution strengthening nickel-base alloy wlding Heat stability is good, matrix Solid Free phase transformation。By alloying element, the mechanism of action of matrix is improved thermal coefficient of expansion and the plasticity of material, thus producing big heat (expansion) stress in welding process to make generation plastic deformation under deposited metal high temperature；Simultaneously because the plasticity that austenitic matrix is good, it is to avoid ftracture under bigger welding residual stress and distortion amount。Due to weld seam solidification and rate of cooling quickly, the distortional strain energy of weld(ing) deposit remaining deformation and plastic deformation remains, and in post weld heat treatment subsequently, weld(ing) deposit there occurs (static state) recrystallization more than recrystallization temperature。
The weld(ing) deposit plastic deformation that welded stress causes, exceedes the critical strain amount ε of its recrystallizationcr, and less than its maximum plastic deformation amount δmax。
That is, εcr<εWeld seam<δmax
Mn, B element interpolation reduce the invar characteristic of alloy, the thermal coefficient of expansion of alloy can be increased。Ti and Al is the hardening constituent ' (Ni of ordered structure3(Al, Ti)) forming element, as the alloy wlding of solution strengthening, the content of Ti and Al element should be reduced as far as possible, the generation of post weld heat treatment reheat crack(ing) can be avoided；Controlling Ti/Al ratio, Ti/Al can reduce structure stability during high temperature than time too high simultaneously, and fragility η (Ni occurs3Low-alloyed high-temp plastic, drops in Ti) phase in version。Strict control W and Zr constituent content, to avoid weldability to deteriorate。
Additionally, rare earth element can reduce the mobility of nickel-base alloy liquid, increase weld seam crystallization crack sensitivity, therefore without rare earth element in welding wire chemical composition。
Summary of the invention:
It is an object of the invention to the problems such as, component segregation big for existing ultra supercritical Utility Boiler Superheater/reheater tube welding point residual stress is serious, weld metal zone solidification (casting) state tissue is obvious, it is provided that a kind of weld(ing) deposit can the nickel-base alloy bare welding filler metal of recrystallization。
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that and realizes:
A kind of weld(ing) deposit can the nickel-base alloy bare welding filler metal of recrystallization, this nickel-base alloy bare welding filler metal is prepared from by weight percentage by following component: Fe < 3%, Cr:14-18%, Al+Ti≤0.45% and Ti/Al < 0.9, Nb:1.0-1.5%, Mo:7.0-9.8%, W < 0.4%, Si≤1.0%, Mn:0.5-1.0%, C≤0.1%, B:0.003-0.005%, Zr≤0.03%, all the other are Ni, and other impurity elements summation < 0.1%。
The present invention is further improved by, this nickel-base alloy bare welding filler metal use vacuum drying oven smelt, through forging, rolling, cold drawn and annealing after, ultimately form nickel-base alloy bare welding filler metal。
The present invention is further improved by; the specification of nickel-base alloy bare welding filler metal is Φ 1.5-2.4mm; employing welding procedure is: manual TIG weldering or semi-automatic silk filling tungsten inert-gas welding TIG; welding current intensity: 105-210A, welding arc voltage: 10.5-18V, speed of welding is: 100～150mm/min; electric current kind/polarity: direct current DC/ is just meeting SP; interlayer temperature not higher than 100 DEG C, protective gas: Ar, gas flow 12～16L/min。
The present invention is further improved by, and during use, adopts Tig Welding, uses Ar as protective gas, forms weld(ing) deposit。
The present invention is further improved by, and weld(ing) deposit is through after 1000～1100 DEG C of heat treatments 30～60 minutes, and air cooling, recrystallization occurs in weld(ing) deposit。
The present invention is further improved by, and nickel-based welding wire is applicable to welding of the welding of ultra-supercritical boiler superheater and reheater tube, superheater and reheater tube and boiler gas collection header。
Relative to prior art, the invention have the advantages that
1, through experiment, the present invention is applicable to the welding of ultra supercritical station boiler high-temperature component, nickel-based welding wire is applicable to welding of the welding of ultra-supercritical boiler superheater and reheater tube, superheater and reheater tube and boiler gas collection header (including stub (tube))。
When 2, utilizing welding wire of the present invention to weld, weld(ing) deposit high-temp plastic is good, is not likely to produce weld crack。
3, welding wire of the present invention is capable of the microalloying of weld seam, obtains the weld seam that conformance with standard requires。
When 4, utilizing welding wire of the present invention to weld, weld(ing) deposit is after postwelding recrystallization (heat) processes, the weld metal zone solidification column crystal of state and dendrite be changed into equiax crystal, farthest eliminate composition of weld line segregation and welding residual stress, keep and the concordance of mother metal tissue。
Accompanying drawing illustrates:
Fig. 1 is the optical microscope pattern photo of welding IN740H nickel-base alloy (mother metal) welding joint structure；Wherein, the optical microscope pattern photo that Fig. 1 (a) is as-welded microstructure, the optical microscope pattern photo that Fig. 1 (b) is postwelding dynamic recrystallization treatment tissue。
Fig. 2 is the optical microscope pattern photo of welding GH2984 ni-fe-based alloy (mother metal) welding joint structure；Wherein, the optical microscope pattern photo that Fig. 2 (a) is as-welded microstructure, the optical microscope pattern photo that Fig. 2 (b) is postwelding dynamic recrystallization treatment tissue。
Detailed description of the invention:
Below in conjunction with embodiment, the present invention is described in further detail。
Embodiment 1:
Referring to Fig. 1; this welding wire (Φ 1.5mm) is used to adopt manual TIG to weld; IN740H nickel-base alloy is welded; welding current: 140A, weldingvoltage: 13V, speed of welding is: 110mm/min; electric current kind/polarity: direct current DC/ is just meeting SP; interlayer temperature not higher than 100 DEG C, protective gas: Ar, gas flow 13L/min。Postwelding carries out 1050 DEG C/1h heat treatment, and seam organization is become the defect generations such as equiax crystal, and welding crackle from column crystal and the dendrite of postwelding。Postwelding commissure hardness is 310HV, and impact flexibility is 22kJ；After post weld heat treatment, hardness reduces to 215HV, and impact flexibility is 31kJ。
Embodiment 2:
Referring to Fig. 2; this welding wire (Φ 2.4mm) is used to adopt manual TIG to weld; GH2984 ni-fe-based alloy is welded; welding current: 160A, weldingvoltage: 14V, speed of welding is: 120mm/min; electric current kind/polarity: direct current DC/ is just meeting SP; interlayer temperature not higher than 100 DEG C, protective gas: Ar, gas flow 15L/min。Postwelding carries out 1100 DEG C/30min heat treatment, and seam organization is become the defect generations such as equiax crystal, and welding crackle from column crystal and the dendrite of postwelding。Postwelding commissure hardness is 300HV, and impact flexibility is 26kJ；After post weld heat treatment, hardness reduces to 210HV, and impact flexibility is 46kJ。
Claims (6)
1. a weld(ing) deposit can the nickel-base alloy bare welding filler metal of recrystallization, it is characterized in that, this nickel-base alloy bare welding filler metal is prepared from by weight percentage by following component: Fe < 3%, Cr:14-18%, Al+Ti≤0.45% and Ti/Al < 0.9, Nb:1.0-1.5%, Mo:7.0-9.8%, W < 0.4%, Si≤1.0%, Mn:0.5-1.0%, C≤0.1%, B:0.003-0.005%, Zr≤0.03%, all the other are Ni, and other impurity elements summation < 0.1%。
2. the weld(ing) deposit described in claim 1 can the nickel-base alloy bare welding filler metal of recrystallization, it is characterised in that this nickel-base alloy bare welding filler metal uses vacuum drying oven to smelt, and after forging, rolling, cold drawn and annealing, ultimately forms nickel-base alloy bare welding filler metal。
3. the weld(ing) deposit described in claim 1 can the nickel-base alloy bare welding filler metal of recrystallization; it is characterized in that; the specification of nickel-base alloy bare welding filler metal is Φ 1.5-2.4mm; employing welding procedure is: manual TIG weldering or semi-automatic silk filling tungsten inert-gas welding TIG; welding current intensity: 105-210A; welding arc voltage: 10.5-18V; speed of welding is: 100～150mm/min; electric current kind/polarity: direct current DC/ is just meeting SP; interlayer temperature is not higher than 100 DEG C; protective gas: Ar, gas flow 12～16L/min。
4. the weld(ing) deposit described in claim 1 can the nickel-base alloy bare welding filler metal of recrystallization, it is characterised in that during use, adopts Tig Welding, uses Ar as protective gas, form weld(ing) deposit。
5. use the weld(ing) deposit described in claim 4 can the nickel-base alloy bare welding filler metal of recrystallization, it is characterised in that weld(ing) deposit is through after 1000～1100 DEG C of heat treatments 30～60 minutes, and air cooling, recrystallization occurs in weld(ing) deposit。
6. the weld(ing) deposit described in claim 1 can the nickel-base alloy bare welding filler metal of recrystallization, it is characterised in that nickel-based welding wire is applicable to welding of the welding of ultra-supercritical boiler superheater and reheater tube, superheater and reheater tube and boiler gas collection header。
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| CN201610230578.5A CN105689919B (en) | 2016-04-14 | 2016-04-14 | A kind of nickel-base alloy bare welding filler metal that weld(ing) deposit can recrystallize |
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| CN201610230578.5A CN105689919B (en) | 2016-04-14 | 2016-04-14 | A kind of nickel-base alloy bare welding filler metal that weld(ing) deposit can recrystallize |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723637A (en) * | 2018-06-20 | 2018-11-02 | 华能国际电力股份有限公司 | A kind of 700 DEG C of ultra supercritical station boilers ferronickel base welding wire |
| CN110666393A (en) * | 2019-11-15 | 2020-01-10 | 攀钢集团江油长城特殊钢有限公司 | Core wire material and preparation method thereof |
| CN111194250A (en) * | 2017-12-08 | 2020-05-22 | Vdm金属国际有限公司 | Welding additive |
| CN112025137A (en) * | 2020-07-21 | 2020-12-04 | 江苏金桥焊材科技股份有限公司 | High-temperature corrosion-resistant nickel-based welding wire and smelting and preparation method thereof |
| CN112518172A (en) * | 2020-11-24 | 2021-03-19 | 中国华能集团有限公司 | Nickel-cobalt-based high-temperature alloy welding wire |
| CN113084313A (en) * | 2021-03-03 | 2021-07-09 | 广州特种承压设备检测研究院 | Argon tungsten-arc welding process for steel for ultra-supercritical boiler |
| CN113510340A (en) * | 2021-08-10 | 2021-10-19 | 哈尔滨电气动力装备有限公司 | Welding and postweld heat treatment process method for martensite precipitation hardening stainless steel material |
| CN114799425A (en) * | 2022-06-30 | 2022-07-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Welding process for invar steel medium plate |
| CN116329809A (en) * | 2023-05-29 | 2023-06-27 | 西安热工研究院有限公司 | Nickel-based amorphous flux-cored wire and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111194250A (en) * | 2017-12-08 | 2020-05-22 | Vdm金属国际有限公司 | Welding additive |
| CN111194250B (en) * | 2017-12-08 | 2022-04-26 | Vdm金属国际有限公司 | Welding additive |
| CN108723637A (en) * | 2018-06-20 | 2018-11-02 | 华能国际电力股份有限公司 | A kind of 700 DEG C of ultra supercritical station boilers ferronickel base welding wire |
| CN108723637B (en) * | 2018-06-20 | 2020-12-08 | 华能国际电力股份有限公司 | Nickel-iron-based welding wire for 700 ℃ ultra-supercritical power station boiler |
| CN110666393B (en) * | 2019-11-15 | 2021-09-28 | 攀钢集团江油长城特殊钢有限公司 | Core wire material and preparation method thereof |
| CN110666393A (en) * | 2019-11-15 | 2020-01-10 | 攀钢集团江油长城特殊钢有限公司 | Core wire material and preparation method thereof |
| CN112025137A (en) * | 2020-07-21 | 2020-12-04 | 江苏金桥焊材科技股份有限公司 | High-temperature corrosion-resistant nickel-based welding wire and smelting and preparation method thereof |
| CN112518172A (en) * | 2020-11-24 | 2021-03-19 | 中国华能集团有限公司 | Nickel-cobalt-based high-temperature alloy welding wire |
| CN113084313A (en) * | 2021-03-03 | 2021-07-09 | 广州特种承压设备检测研究院 | Argon tungsten-arc welding process for steel for ultra-supercritical boiler |
| CN113510340A (en) * | 2021-08-10 | 2021-10-19 | 哈尔滨电气动力装备有限公司 | Welding and postweld heat treatment process method for martensite precipitation hardening stainless steel material |
| CN114799425A (en) * | 2022-06-30 | 2022-07-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Welding process for invar steel medium plate |
| CN114799425B (en) * | 2022-06-30 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Invar steel medium plate welding process |
| CN116329809A (en) * | 2023-05-29 | 2023-06-27 | 西安热工研究院有限公司 | Nickel-based amorphous flux-cored wire and preparation method thereof |
| CN116329809B (en) * | 2023-05-29 | 2023-09-08 | 西安热工研究院有限公司 | Nickel-based amorphous flux-cored wire and preparation method thereof |
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