CN108127291A - A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires - Google Patents
A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires Download PDFInfo
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- CN108127291A CN108127291A CN201711426146.2A CN201711426146A CN108127291A CN 108127291 A CN108127291 A CN 108127291A CN 201711426146 A CN201711426146 A CN 201711426146A CN 108127291 A CN108127291 A CN 108127291A
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- welding wire
- heat resisting
- resisting steel
- ultra supercritical
- surplus
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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
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires, chemical composition composition is：C 0.06 0.13, Mn 0.55 0.95, Si≤0.50, P≤0.010, S≤0.008, Cr 7.8 9.7, Co 2.5 3.5, W 2.5 3.5, Nb 0.02 0.12, V 0.12 0.32, Cu 0.50 1.10, B 0.001 0.024, N 0.005 0.025, surplus are Fe and impurity.Welding technological properties of the present invention is good, deposited metal tensile strength Rm >=680MPa under the heat treatment condition of 780 DEG C × 3h, room temperature KV2 >=50J, particularly suitable for ultra-supercritical boiler unit steel, the especially welding of martensite heat-resistant steel G115.
Description
Technical field
The invention belongs to field of welding material, more particularly to a kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel are solid
Welding wire.
Background technology
As, to the wilderness demand of electric power, relevant departments and enterprise compel caused by the fast development of national economy in recent years
Be essential power plant construction to be improved and operation efficiency, reduce cost and take into account environmental protection simultaneously.Develop under these conditions super
Boilers unit has become the dominant direction of power plant construction.And novel martensitic heat resisting steel G115, in 620~650 DEG C of temperature
Section has excellent structure stability and creep rupture strength, and creep rupture strength is 1.5 times of P92 steel, while its high temperature resistance steam oxygen
Change corrosive nature better than P92 steel, excellent performance will be applied to the fields such as ultra-supercritical boiler high temperature and pressure component.Therefore its phase
The research and development of matching welding material are particularly important.Especially matching wlding needs and there is base material identical high temperature to hold
Long intensity, Properties of High Temperature Creep；High temperature resistance gas-side corrosion performance；Medium oxidizing performance of high temperature resistance carbonated drink etc., to researching and developing work
Make proposition requirements at the higher level.
Invention content
In view of the above problems, the present invention provides a kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires, it is main
Ingredient is wanted as 9%Cr-3%W-3%Co, and adds trace alloying element, welding technological properties is good, in the heat of 780 DEG C × 3h
Deposited metal tensile strength Rm >=680MPa under treatment conditions, room temperature KV2 >=50J, particularly suitable for ultra-supercritical boiler machine
The welding of group steel, especially martensite heat-resistant steel G115.
To reach more than technical purpose, the technical scheme is that, a kind of 650 DEG C of ultra supercritical coal-fired units are with heat-resisting
Steel solid welding wire, weight percent, the core wire chemical composition composition of the welding wire are：C 0.06-0.13, Mn 0.55-
0.95, Si≤0.50, P≤0.010, S≤0.008, Cr 7.8-9.7, Co 2.5-3.5, W2.5-3.5, Nb 0.02-0.12,
V 0.12-0.32, Cu 0.50-1.10, B 0.001-0.024, N 0.005-0.025, surplus are Fe and impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.085, Mn 0.81, Si 0.18, P 0.008, S
0.003, Cr 8.87, Co 3.17, W 3.11, Nb 0.06, V 0.24, Cu 0.6, B 0.0018, N 0.007, surplus Fe
And impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.078, Mn 0.77, Si 0.17, P 0.008, S
0.002, Cr 8.89, Co 3.12, W 3.17, Nb 0.05, V 0.23, Cu 0.60, B 0.0020, N 0.007, surplus Fe
And impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.081, Mn 0.87, Si 0.19, P 0.007, S
0.002, Cr 8.96, Co 2.96, W 3.11, Nb 0.06, V 0.26, Cu 0.69, B 0.0029, N 0.006, surplus Fe
And impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.087, Mn 0.85, Si 0.23, P 0.007, S
0.002, Cr 8.80, Co3.01, W 2.95, Nb0.05, V0.20, Cu 0.65, B 0.0030, N 0.008, surplus for Fe and
Impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.088, Mn 0.80, Si 0.22, P 0.007, S
0.002, Cr 8.82, Co 3.03, W 2.98, Nb 0.07, V 0.21, Cu 0.64, B 0.0032, N 0.007, surplus Fe
And impurity.
Preferably, the core wire chemical composition composition of the welding wire is：C 0.080, Mn 0.82, Si 0.20, P 0.007,
S0.003, Cr8.80, Co2.89, W2.89, Nb0.08, V0.25, Cu0.62, B 0.0042, N0.007, surplus are Fe and miscellaneous
Matter.
According to weight percent, the deposited metal composition composition of the welding wire is：C 0.05-0.13, Mn 0.55-
0.95, Si≤0.50, P≤0.010, S≤0.008, Cr 7.8-9.7, Co 2.5-3.5, W 2.5-3.5, Nb 0.02-0.12,
V 0.12-0.32, Cu 0.50-1.10, B 0.001-0.024, N 0.005-0.025, surplus are Fe and impurity.
In welding process of the present invention not against its welding agent carry out alloy adjustment, only rely on the control of core wire ingredient, obtain compared with
Good physical and chemical performance has preferable weldability simultaneously.It is tested mutually by test of many times and with base material G115 steel correlation test
Card, the present invention are described below the restriction reason of chemical element each in core wire respectively：C has very strong invigoration effect, simultaneously meeting
Material plasticity and toughness are significantly reduced, as C ＞ 1.3%, with the increase of phosphorus content, the intensity of steel declines instead, and too low
C it is unfavorable to creep rupture strength, therefore C content should be limited in 0.06-0.13%.
A small amount of Mn can reduce S contents, promote weld seam deoxidation, but too many Mn can reduce tissue high temperature it is ferritic steady
It is qualitative, therefore the control of its content is advisable in 0.55-0.95%.
The Si added in core wire of the present invention is a kind of important deoxidier, and alloy can also be improved when being existed simultaneously with Cr
High-temperature oxidation resistance, therefore general control is within 0.5%.
P, S has formed low melting point eutectic, and crystal boundary is precipitated in when tempering, reduces the strength of materials, therefore need to strictly control its content, point
Not Wei P≤0.010%, S≤0.008%.
Cr can improve the antioxygenic property and corrosive nature of heat resisting steel；Creep rupture strength and the creep for improving steel are strong
Degree is solid-solution in matrix and plays solution strengthening effect, but Cr too high levels can reduce creep rupture strength, so the control of Cr contents is in 7.8-
9.7% is advisable.
The study found that added in steel under the conditions of 650 DEG C 3% or so Co elements have to the creep rupture strength of steel it is most advantageous
Influence, therefore its content control be advisable in 2.5-3.5%.
W can significantly improve creep rupture strength and the creep limit of heat resisting steel, and the optimised quantity of W is controlled in 2.5-3.5%.
Nb contents are controlled in 0.02-0.12%, so as to ensure that weld metal has excellent high temperature creep property and ideal
Room temperature toughness.
V is strong carbide former, and weld strength, but easy shape can be significantly improved with crystal grain thinning by adding in V in steel
Into grain-boundary crack, V Optimal Controls are in 0.12-0.32%.
Cu can improve the intensity and toughness of steel, particularly atmospheric corrosion performance, but too high levels can reduce the high temperature modeling of steel
Property, therefore the control of the content of Cu is in 0.50-1.10%.
B can easily be combined into BN in molten pool metal process of setting with crystal grain thinning with N, reduce the content of solid solution N；But
During B element containing high level, if N content is excessively high, larger BN particles may be formed, in the strong of severe weakness steel itself
While toughness, will also the B element for intercrystalline strengthening be consumed, so as to seriously affect the creep rupture strength of steel, content control
System is in 0.001-0.024%.
N is strong austenite former, it is 20 times stronger than Ni to the stability action of austenite, and excessively high N can drop
Low toughness of material, content are controlled in 0.005-0.025%.
Remaining is Fe and impurity.
The beneficial effects of the present invention are：
(1) welding wire process is excellent, and molten iron flow is good, and appearance of weld is beautiful, the cleaning of postwelding welding bead；
(2) welding wire can be suitably used for all-position welding；
(3) welding wire deposited metal tensile strength R under the heat treatment condition of 780 DEG C × 3hm
>=680MPa, room temperature KV2 >=50J；
(4) the welding wire weld metal has excellent long term high temperature creep strength.
650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires of the invention by adding trace alloying element, obtain
Weld bead composition approximate with base material and tissue, so as to obtain and the approximate physical and chemical performance of base material.
Deposited metal main component of the present invention is 9%Cr-3%W-3%Co, and welding technological properties is good, in 780 DEG C × 3h
Heat treatment condition under deposited metal tensile strength Rm >=680MPa, room temperature KV2 >=50J, particularly suitable for ultra supercritical pot
Stove unit steel, the especially welding of martensite heat-resistant steel G115.
Specific embodiment
Technical scheme of the present invention is further described, but the present invention is not limited to this with reference to specific embodiment
A little embodiments.
A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires, weight percent, the core wire of the welding wire
Chemical composition forms：C0.06-0.13, Mn 0.55-0.95, Si≤0.50, P≤0.010, S≤0.008, Cr 7.8-9.7,
Co 2.5-3.5, W 2.5-3.5, Nb 0.02-0.12, V 0.12-0.32, Cu 0.50-1.10, B 0.001-0.024, N
0.005-0.025, surplus are Fe and impurity.
Embodiment 1：
A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires produce work using copper facing and without copper plating soldering wire
Skill manufactures welding wire and is respectively welded：
Table 1-1 core wire ingredient (units：Weight percent)
Solid welding wire preparation method, comprises the steps of：
A. vacuum drying oven is smelted；B. steel rolling is into wire rod；
C. semi-finished product are made in annealing, drawing, coating process；
D. it is produced according to customer demand without copper facing and copper facing finished product welding wire.
The mechanical property of table 1-2 deposited metals
Table 1-3 deposited metal compositions
Embodiment 2：
A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires produce work using copper facing and without copper plating soldering wire
Skill manufactures welding wire and is respectively welded：
Table 2-1 core wire ingredient (units：Weight percent)
The mechanical property of table 2-2 deposited metals
Table 2-3 deposited metal compositions
Embodiment 3：
A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires produce work using copper facing and without copper plating soldering wire
Skill manufactures welding wire and is respectively welded：
Table 3-1 core wire ingredient (units：Weight percent)
The mechanical property of table 3-2 deposited metals
Table 3-3 deposited metal compositions
650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires of the invention, add trace alloying element, deposited metal
Main component is 9%Cr-3%W-3%Co, and welding technological properties is good, the deposited metal under the heat treatment condition of 780 DEG C × 3h
Tensile strength Rm >=680MPa, room temperature KV2 >=50J, particularly suitable for ultra-supercritical boiler unit steel, especially martensite
The welding of heat resisting steel G115.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection domain.
Claims (8)
1. a kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires, which is characterized in that according to weight percent, institute
State welding wire core wire chemical composition composition be：C 0.06-0.13, Mn 0.55-0.95, Si≤0.50, P≤0.010, S≤
0.008, Cr 7.8-9.7, Co 2.5-3.5, W 2.5-3.5, Nb 0.02-0.12, V 0.12-0.32, Cu 0.50-1.10, B
0.001-0.024, N 0.005-0.025, surplus are Fe and impurity.
2. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.085, Mn 0.81, Si 0.18, P 0.008, S 0.003, Cr 8.87, Co
3.17, W 3.11, Nb 0.06, V 0.24, Cu 0.6, B 0.0018, N 0.007, surplus are Fe and impurity.
3. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.078, Mn 0.77, Si 0.17, P 0.008, S 0.002, Cr 8.89, Co
3.12, W 3.17, Nb 0.05, V 0.23, Cu 0.60, B 0.0020, N 0.007, surplus are Fe and impurity.
4. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.081, Mn 0.87, Si 0.19, P 0.007, S 0.002, Cr 8.96, Co
2.96, W 3.11, Nb 0.06, V 0.26, Cu 0.69, B 0.0029, N 0.006, surplus are Fe and impurity.
5. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.087, Mn 0.85, Si 0.23, P 0.007, S 0.002, Cr 8.80, Co
3.01, W 2.95, Nb 0.05, V 0.20, Cu 0.65, B 0.0030, N 0.008, surplus are Fe and impurity.
6. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.088, Mn 0.80, Si 0.22, P 0.007, S 0.002, Cr 8.82, Co
3.03, W 2.98, Nb 0.07, V 0.21, Cu 0.64, B 0.0032, N 0.007, surplus are Fe and impurity.
7. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that described
The core wire chemical composition of welding wire forms：C 0.080, Mn 0.82, Si 0.20, P 0.007, S 0.003, Cr 8.80, Co
2.89, W 2.89, Nb 0.08, V 0.25, Cu 0.62, B 0.0042, N 0.007, surplus are Fe and impurity.
8. 650 DEG C of ultra supercritical coal-fired units heat resisting steel solid welding wire as described in claim 1, which is characterized in that according to
Weight percent, the deposited metal composition composition of the welding wire are：C 0.05-0.13, Mn 0.55-0.95, Si≤
0.50, P≤0.010, S≤0.008, Cr 7.8-9.7, Co 2.5-3.5, W 2.5-3.5, Nb 0.02-0.12, V 0.12-
0.32, Cu 0.50-1.10, B 0.001-0.024, N 0.005-0.025, surplus are Fe and impurity.
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| CN201711426146.2A CN108127291A (en) | 2017-12-25 | 2017-12-25 | A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires |
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| CN201711426146.2A CN108127291A (en) | 2017-12-25 | 2017-12-25 | A kind of 650 DEG C of ultra supercritical coal-fired unit heat resisting steel solid welding wires |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048119A (en) * | 2018-08-30 | 2018-12-21 | 天津重型装备工程研究有限公司 | A kind of 650 DEG C of ultra supercritical thermal power steam turbine steel-casting solid welding wires |
| CN111112878A (en) * | 2019-12-25 | 2020-05-08 | 北京北冶功能材料有限公司 | Bright welding wire for heat-resistant steel of ultra-supercritical coal-fired power station |
| CN114161027A (en) * | 2022-01-07 | 2022-03-11 | 北京科技大学 | Welding wire for 630 ℃ ultra-supercritical G115 heat-resistant steel, preparation method and GTAW using method |
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| CN103056548A (en) * | 2012-12-20 | 2013-04-24 | 成都新大洋焊接材料有限责任公司 | High-strength heat-resistant steel gas-shielded solid wire |
| CN106425157A (en) * | 2016-10-28 | 2017-02-22 | 四川大西洋焊接材料股份有限公司 | TIG welding wire of steel for steam temperature ultra supercritical thermal power generating unit and preparation method thereof |
| CN106736033A (en) * | 2016-12-29 | 2017-05-31 | 钢铁研究总院 | G115 heat resisting steel argon-arc welding wires |
| CN106914712A (en) * | 2017-03-10 | 2017-07-04 | 钢铁研究总院 | G115 heat resisting steel argon arc welding solid core welding wire |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056548A (en) * | 2012-12-20 | 2013-04-24 | 成都新大洋焊接材料有限责任公司 | High-strength heat-resistant steel gas-shielded solid wire |
| CN106425157A (en) * | 2016-10-28 | 2017-02-22 | 四川大西洋焊接材料股份有限公司 | TIG welding wire of steel for steam temperature ultra supercritical thermal power generating unit and preparation method thereof |
| CN106736033A (en) * | 2016-12-29 | 2017-05-31 | 钢铁研究总院 | G115 heat resisting steel argon-arc welding wires |
| CN106914712A (en) * | 2017-03-10 | 2017-07-04 | 钢铁研究总院 | G115 heat resisting steel argon arc welding solid core welding wire |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048119A (en) * | 2018-08-30 | 2018-12-21 | 天津重型装备工程研究有限公司 | A kind of 650 DEG C of ultra supercritical thermal power steam turbine steel-casting solid welding wires |
| CN111112878A (en) * | 2019-12-25 | 2020-05-08 | 北京北冶功能材料有限公司 | Bright welding wire for heat-resistant steel of ultra-supercritical coal-fired power station |
| CN114161027A (en) * | 2022-01-07 | 2022-03-11 | 北京科技大学 | Welding wire for 630 ℃ ultra-supercritical G115 heat-resistant steel, preparation method and GTAW using method |
| CN114161027B (en) * | 2022-01-07 | 2022-12-30 | 北京科技大学 | Welding wire for 630 ℃ ultra-supercritical G115 heat-resistant steel, preparation method and GTAW using method |
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