CN102814599A - Welding wire for oxide dispersion strengthen (ODS) alloy melt welding - Google Patents
Welding wire for oxide dispersion strengthen (ODS) alloy melt welding Download PDFInfo
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- CN102814599A CN102814599A CN2012102858003A CN201210285800A CN102814599A CN 102814599 A CN102814599 A CN 102814599A CN 2012102858003 A CN2012102858003 A CN 2012102858003A CN 201210285800 A CN201210285800 A CN 201210285800A CN 102814599 A CN102814599 A CN 102814599A
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- welding wire
- alloy melt
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Abstract
The invention relates to the filed of novel material welding, is mainly used for oxide dispersion strengthen (ODS) alloy melt welding, and aims to solve the problem that the mechanical properties of a welded joint are reduced because the particles of an original wild phase are burnt and reunited, a new wild phase is not uniformly distributed and the like in the welded joint of the ODS alloy melt welding. An in-situ alloying welding method is utilized, a welding wire disclosed by the invention is added into a welding pool to in-situ produce a new particle phase which is more stable, and thus, the strength and other mechanical properties of a welded joint are improved. The welding wire comprises the following constituents according to mass fraction: 10%-25% of Cr, 1%-5% of Si, 0.5%-4% of Ti, 0.1%-0.3% of C, 2%-10% of Y2O3, 0.5%-3% of W, 0.2%-1% of Mn, 0.1%-0.5% of Ta, 0.1%-0.5% of V, 1%-5% of La2O3 and the balance of Fe, wherein Cr, Si and Ti are main adding elements.
Description
Technical field
The present invention relates to the new material welding field; Be mainly used in the molten solder of ODS alloy; To occurring the problem that former wild phase particle scaling loss, reunion, newborn wild phase skewness etc. reduce welding joint mechanical property in the ODS alloy melting welding line, utilize the home position alloying welding method, through in welding pool, adding welding wire of the present invention; Original position generates more stable new particle phase, thus mechanical properties such as raising strength of welded joint.
Background technology
The ODS alloy prepares for adopting the mechanical alloying method, and oxide dispersion intensifying (Oxide dispersion strengthened, sheet alloy ODS) of the rolling processing of process; Therefore the characteristics of excellent combination properties such as the ODS alloy has that mechanical behavior under high temperature is good, high-temperature oxidation resistant and corrosion resistance are good are having outstanding advantage aspect the selection of aero-engine hot junction parts; At present, this material is applied in fields such as the Aeronautics and Astronautics of some developed countries and the energy.Such as being applied to the efficient cooling structure of aero-engine---many dead levels plate structure, its chemical composition is as shown in table 1:
Table 1 ODS alloy composition (mass fraction, %)
The ODS alloy is not in metallurgical poised state; Weld relatively difficulty with the melting method, this be because: the fusion process during melting welding has been destroyed the unbalanced metallurgical state of ODS alloy, makes some fusing points of original adding metallic matrix high, oxide particle that density is light than metal again separates with liquid metals; And gathering slagging; Remain in the weld seam or come-up focuses on face of weld, this has just destroyed the original mechanical properties such as composition and performance, particularly tensile strength of material.
Below be when adopting ODS alloy material itself as packing material, the tissue of welding point and pulled out condition:
The thick ODS alloy of 1.3mm is carried out the TIG weldering; Before the welding strictness cleaning is carried out on the base metal test specimen surface, adopted straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s; Adopt purity be 99.9% argon gas as protection gas, gas flow is 8 L/min, is on the MW3000 inversion total digitalization tungsten argon arc welding machine ODS alloy to be carried out butt welding in model; Postwelding is produced metallographic and tensile sample along seam cross-section; Utilize SEM and EDS to analyze; Analysis-by-synthesis Fig. 1, Fig. 2; There are some circular holes in face of weld under ESEM, and in some holes, seeing has the spherical particle thing to exist, and with XRD spherical particle constituent analysis in the hole is learnt; These particles should be alligatoring dispersion-strengtherning phase Y-Al composite oxides, this is because fusion process surpasses the ultra-fine oxide particle (Y that original disperse distributes in the matrix that 1500 ℃ high temperature causes steel inevitably
2O
3) the scaling loss reunion takes place, generate the Al of diameter more than 1um
5Y
3O
12Particle, alligatoring the Y-Al composite oxide particle lost the invigoration effect of butt welded seam, seriously reduced the ODS tensile strength of alloys, the hot strength of welding point is merely 380MPa.
To occurring problems such as wild phase particle scaling loss, wild phase skewness in the ODS alloy melting welding line; Adopt the home position alloying welding method; Through in welding pool, adding trace alloying element Ti, Si, C, W, Mn, Ta, V etc., original position generates more stable new particle phase; And, in crystal grain thinning, purification weld seam, can generate AlYO through in welding pool, adding trace rare-earth element
3And ReMO
3Etc. enhanced granule, thereby improve tensile strength, seam original position alloying welding ODS alloy needs a kind of welding filling material, and therefore inventing a kind of welding filling material is to realize the key of ODS alloy melting weldering.
Literature search through to prior art is found, does not occur relevant patent application at present both at home and abroad as yet.
Summary of the invention
The object of the present invention is to provide a kind of packing material of molten solder of the ODS of being applied to alloy,, obtain the good weld seam that is shaped, improve the mechanical property of welding point tissue with problems such as the former wild phase particle of effective inhibition scaling loss, reunions.
For achieving the above object, the method that the present invention adopts is: be basis with mother metal matrix chemical composition, and alloying elements such as interpolation Si, Ti, W, V, Ta, Re, the content through conversion coherent element or compound welds; Y wherein
2O
3And La
2O
3Thereby adding can crystal grain thinning and form new particle wild phase butt welded seam metal and have humidification, confirm that through the overtesting contrast its composition is designed to (mass fraction) 2%～10%; The adding of Si can improve the flowability in molten bath in the welding process, generates SiO
2Particle had not only played humidification but also had reduced the oxygen content in the molten bath matrix, confirmed that through the overtesting contrast its composition is designed to (mass fraction) 1%～5%; Dosing an amount of Ti (0.5%～4%), is in order to form a large amount of diffusion carbide TiC, control grain growth, crystal grain thinning, the raising strength of materials and toughness; The adding of C can reduce air holes through the dividing potential drop effect on the one hand, can form wild phase particles such as TiC, TaC with other element reactions on the other hand; Done experimental result in conjunction with the front, the composition of W (mass fraction) is designed to 0.5%～3%, and purpose is enough normal temperature and the elevated temperature strength that keeps required; Consider the influence of the content of Cr to the low-temperature impact toughness value, the composition that the content of Cr is adjusted Cr is designed to (mass fraction) 10%～25%; Dosing an amount of Ta (0.1%～0.5%), is in order to form a large amount of diffusion carbides, the control grain growth; Crystal grain thinning improves the strength of materials and toughness, Ta (C; N) generation can provide the core of a large amount of forming cores on the one hand; Be beneficial to forming core, these second have hindered the sliding motion of dislocation mutually on the other hand, thereby have increased the drag of plastic deformation; Add Mn (mass fraction) and be designed to 0.2 %～1%, main purpose is to improve the intensity of welding point; Need to add an amount of V, (mass fraction) designs between 0.1%-0.5%, can obtain and the complementary effect of W.
The weldering of ODS alloy melting is with in the welding wire, and the relative proportion (mass fraction) of each composition should be following:
Cr:10%～25%; Si:1%～5%; Ti:0.5%～4%; C:0.1%～0.3%; Y
2O
3: 2%～10%; W:0.5%～3%; Mn:0.2 %～1%; Ta:0.1%～0.5%; V:0.1%～0.5%; La
2O
3: 1%～5%; All the other Fe; Wherein Cr, Si, Ti are the main element that adds.
Above-mentioned chemical composition proportion optimization contains Cr:20%; Si:2%; Ti:1%; Y
2O
3: 4%; C:0.25%; Mn:0.45%; W:1.5%; Ta: 0.15%; V:0.15%; La
2O
3: 4%; Surplus Fe.
The present invention has the following advantages:
1) this packing material has good welding procedure property; Can adopt gas shield melting methods such as Ar, He to weld; Generated in-situ novel enhanced particle is tiny, be evenly distributed; Feasible weldering meets Metal Mechanic Property high, but also have moulding attractive in appearance, splash little and realize advantage such as all-position welding.
2) this welding wire has made full use of the rich rare earth metal of China, is based on domesticly, and raw material supply is sufficient; Therefore, with low cost, can obtain favorable social and economic benefits.
Description of drawings
The weld seam micro-organization chart of Fig. 1 mother metal melting;
The weld seam XRD analysis figure of Fig. 2 mother metal melting;
Fig. 3 comparative example 1 weld seam micro-organization chart;
Fig. 4 comparative example 2 weld seam micro-organization chart;
The weld seam micro-organization chart of Fig. 5 specific embodiment 1;
The weld seam XRD analysis figure of Fig. 6 specific embodiment 1;
The weld seam micro-organization chart of Fig. 7 specific embodiment 1;
The weld seam micro-organization chart of Fig. 8 specific embodiment 2.
The specific embodiment
Adopt the packing material of the present invention, can effectively suppress the harmful interfacial reaction in the welding process, obtain the good weld seam that is shaped, improve the mechanical property of seam organization as ODS alloy melting weldering welding.
In order to obtain these characteristics; The present invention processes welding filling material to the above-mentioned element that can improve the weldability of ODS alloy by proportioning; The problems that exist in the melting welding to the ODS alloy; Need to add and to have corresponding inhibiting different elements, not only need adjust the constituent of packing material, also will control ratio between each composition well.
The invention example of the contrast scope of the invention describes below.
The comparative example 1
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity is that 99.9% argon gas is as protecting gas; Gas flow is 8L/min, adopts straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s select for use to contain Cr:20%; Si:2%; Ti:1%; Y
2O
3: 0%; C:0.25%; Mn:0%; W:0%; Ta:0%; V:0%; The welding wire of surplus Fe; In model is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding, and postwelding is produced metallographic and tensile sample along seam cross-section, utilizes SEM; Technological means such as EDS and XRD is analyzed, and the result shows: the welding point place has formed TiC, TiN, Al
3Enhanced granule such as Ti; The size of particle is more than 1 μ m; Even particle distribution but random profile, still there is the burning problems (Fig. 3) of more significantly reuniting in the former enhanced granule in the matrix, and the average tensile strength of welding point is 483MPa; This shows, do not adding Mn, W, Ta, V and rare earth oxide Y
2O
3During Deng trace alloying element, strength of welded joint is lower.
The comparative example 2
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity is that 99.9% argon gas is as protecting gas; Gas flow is 8L/min, adopts straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s select that to contain Cr be 20% for use; Si is 2%; Ti is 1%; Y
2O
3Be 2%; Containing C is 0.1%; Mn:0.20%; W:0.5%; Ta:0.1%; V:0.1%; La
2O
3: 1%; Surplus is the welding wire of Fe, is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding in model, and postwelding is produced metallographic and tensile sample along seam cross-section, utilizes SEM, and EDS and XRD etc. analyzes, and the result shows: the welding point place has formed SiO
2, TiN, TaN, Ti O
2, Al
2O
3, Al
3Ti, AlYO
3, CrO
3And ReMO
3Etc. enhanced granule, the size of particle below 1 μ m, even particle distribution (Fig. 4), the average tensile strength of welding point is 530MPa, this shows, adds a small amount of (when taking off limit value) Mn, W, Ta, V and rare earth oxide Y
2O
3During Deng alloying element, strength of welded joint increases, but still lower.
Specific embodiment 1
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity is that 99.9% argon gas is as protecting gas; Gas flow is 8L/min, adopts straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s select for use and contain Cr:20%; Si:2%; Ti:1%; Y
2O
3: 4%; C:0.25%; Mn:0.45%; W:1.5%; Ta:0.15%; V:0.15%; La
2O
3: 4%; The welding wire of surplus Fe is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding in model, and postwelding is produced metallographic and tensile sample along seam cross-section; Utilize SEM; Technological means such as EDS and XRD is analyzed, complex chart 5, and Fig. 6 can find out: the welding point place has formed SiO
2, TiC, TiN, TiO
2, Al
2O
3, Al
3Ti, YAlO
3, CrO
3, TaC, TaN, WC, VC and ReMO
3Etc. enhanced granule, the size of particle is below 1 μ m, and even particle distribution is well-regulated profile (Fig. 7) also, and the average tensile strength of welding point reaches 652MPa, this shows, adds an amount of Mn, W, Ta, V and rare earth oxide Y
2O
3During Deng alloying element, strength of welded joint can effectively improve.
Specific embodiment 2
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity be 99.9% argon gas as protecting gas, gas flow is 8L/min; Adopt straight polarity direct current, welding current 70A, speed of welding 1.8 mm/s select that to contain Cr be 20% for use; Si is 2%, and Ti is 1%, Y
2O
3Be 8%, containing C is 0.25%, Mn:1%; W:3%; Ta:0. 5%; V:0. 5%; La
2O
3: 5%; Surplus is the welding wire of Fe; In model is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding, and postwelding is produced metallographic and tensile sample along seam cross-section, utilizes SEM; Technological means such as EDS and XRD is analyzed, and the result shows: the welding point place has formed SiO
2, TiC, TiN, Ti O
2, Al
2O
3, Al
3Ti, AlYO
3, CrO
3, TaC, TaN, WC, VC and ReMO
3Etc. enhanced granule, the size of particle is about 1 μ m, and the random profile of even particle distribution, the former enhanced granule in the matrix are assembled burning problems and be significantly improved (Fig. 8), and the average tensile strength of welding point is 604MPa.
Specific embodiment 3
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity is that 99.9% argon gas is as protecting gas; Gas flow is 8L/min, adopts straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s select for use and contain Cr:20%; Si:3%; Ti:2%; Y
2O
3: 4%; C:0.25%; Mn:0.55%; W:2.0%; Ta:0.25%; V:0.25%; La
2O
3: 4%; The welding wire of surplus Fe is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding in model, and postwelding is produced metallographic and tensile sample along seam cross-section; Utilize SEM; Technological means such as EDS and XRD is analyzed, complex chart 5, and Fig. 6 can find out: the welding point place has formed SiO
2, TiC, TiN, TiO
2, Al
2O
3, Al
3Ti, YAlO
3, CrO
3, TaC, TaN, WC, VC and ReMO
3Etc. enhanced granule, the size of particle is below 1 μ m, and even particle distribution is well-regulated profile also, and the average tensile strength of welding point reaches 611MPa.
Specific embodiment 4
Before the welding mother metal test plate (panel) surface is gone out metallic luster with sand papering, and use acetone, employing purity is that 99.9% argon gas is as protecting gas; Gas flow is 8L/min, adopts straight polarity direct current, welding current 70A; Speed of welding 1.8 mm/s select for use and contain Cr:20%; Si:3%; Ti:3%; Y
2O
3: 5%; C:0.25%; Mn:0.6%; W:2.5%; Ta:0.45%; V:0.45%; La
2O
3: 5%; The welding wire of surplus Fe is on the MW3000 inversion total digitalization tungsten argon arc welding machine it to be carried out butt welding in model.Postwelding is produced metallographic and tensile sample along seam cross-section, utilizes SEM, and technological means such as EDS and XRD are analyzed.Complex chart 5, Fig. 6 can find out: the welding point place has formed SiO
2, TiC, TiN, TiO
2, Al
2O
3, Al
3Ti, YAlO
3, CrO
3, TaC, TaN, WC, VC and ReMO
3Etc. enhanced granule, the size of particle is below 1 μ m, and even particle distribution is well-regulated profile also, and the average tensile strength of welding point reaches 623MPa.
Claims (2)
1. one kind is used for the welding wire that the ODS alloy melting welds, and it is characterized in that: the composition of said welding wire is calculated as with mass fraction: Cr:10%～25%; Si:1%～5%; Ti:0.5%～4%; C:0.1%～0.3%; Y
2O
3: 2%～10%; W:0.5%～3%; Mn:0.2 %～1%; Ta:0.1%～0.5%; V:0.1%～0.5%; La
2O
3: 1%～5%; All the other Fe; Wherein Cr, Si, Ti are the main element that adds.
2. a kind of welding wire that is used for the weldering of ODS alloy melting as claimed in claim 1, it is characterized in that: the composition of said welding wire is calculated as with mass fraction: Cr:20%; Si:2%; Ti:1%; Y
2O
3: 4%; C:0.25%; Mn:0.45%; W:1.5%; Ta: 0.15%; V:0.15%; La
2O
3: 4%; Surplus Fe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285800.3A CN102814599B (en) | 2012-08-13 | 2012-08-13 | Welding wire for oxide dispersion strengthen (ODS) alloy melt welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285800.3A CN102814599B (en) | 2012-08-13 | 2012-08-13 | Welding wire for oxide dispersion strengthen (ODS) alloy melt welding |
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|---|---|
| CN102814599A true CN102814599A (en) | 2012-12-12 |
| CN102814599B CN102814599B (en) | 2015-07-08 |
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755919A (en) * | 2017-10-16 | 2018-03-06 | 合肥工业大学 | A kind of welding material and preparation method for the connection of 14Cr ODS ferrous alloys |
| CN114635055A (en) * | 2022-02-14 | 2022-06-17 | 江苏大学 | Powder core wire material preparation method for additive manufacturing by regulating and controlling powder particle size to obtain alloy with accurate components |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57154395A (en) * | 1981-03-19 | 1982-09-24 | Daido Steel Co Ltd | Welding material |
| JPS57156893A (en) * | 1981-03-23 | 1982-09-28 | Daido Steel Co Ltd | Welding material |
| CN101249594A (en) * | 2008-03-21 | 2008-08-27 | 徐州师范大学 | Mild steel arc welding electrode containing lanthanum and Yt element |
| WO2012042861A1 (en) * | 2010-09-30 | 2012-04-05 | 株式会社神戸製鋼所 | Surfacing material, deposited metal, and member involving deposited metal |
-
2012
- 2012-08-13 CN CN201210285800.3A patent/CN102814599B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57154395A (en) * | 1981-03-19 | 1982-09-24 | Daido Steel Co Ltd | Welding material |
| JPS57156893A (en) * | 1981-03-23 | 1982-09-28 | Daido Steel Co Ltd | Welding material |
| CN101249594A (en) * | 2008-03-21 | 2008-08-27 | 徐州师范大学 | Mild steel arc welding electrode containing lanthanum and Yt element |
| WO2012042861A1 (en) * | 2010-09-30 | 2012-04-05 | 株式会社神戸製鋼所 | Surfacing material, deposited metal, and member involving deposited metal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755919A (en) * | 2017-10-16 | 2018-03-06 | 合肥工业大学 | A kind of welding material and preparation method for the connection of 14Cr ODS ferrous alloys |
| CN114635055A (en) * | 2022-02-14 | 2022-06-17 | 江苏大学 | Powder core wire material preparation method for additive manufacturing by regulating and controlling powder particle size to obtain alloy with accurate components |
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