CN108857141A - 620MPa grade gas protection welding wire capable of eliminating stress - Google Patents
620MPa grade gas protection welding wire capable of eliminating stress Download PDFInfo
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- CN108857141A CN108857141A CN201810892050.3A CN201810892050A CN108857141A CN 108857141 A CN108857141 A CN 108857141A CN 201810892050 A CN201810892050 A CN 201810892050A CN 108857141 A CN108857141 A CN 108857141A
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- welding wire
- welding
- stress
- 620mpa
- nuclear power
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- 238000003466 welding Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000012545 processing Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 19
- 229910000859 α-Fe Inorganic materials 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
the invention discloses a 620 MPa-grade gas-shielded welding wire capable of eliminating stress, which comprises, by mass, 0.04-0.07% of C, 0.2-0.5% of Si, 1.0-1.5% of Mn, 1.5-2.1% of Ni, 0.16-0.30% of Mo, 0.02-0.06% of Ti, 0.0005-0.0020% of B, 0.0030-0.0150% of S, and not more than 0.018% of P, with the balance being Fe and inevitable impurities, and satisfying-65 and not more than-20, wherein a is-203C-15.2 Ni +44.7Si +31.5Mo-30Mn +700P +400 Ti., the tensile strength of the welding wire produced by using the method of the invention is not less than 620MPa, the impact toughness of the welding wire-45 ℃ welding state and stress eliminating state (600 ℃ × 10h) is not less than 70J, the toughness of the welding wire is matched, and the welding wire is suitable for eliminating stress of high-quality welding steel for long-time welding.
Description
Technical field
It can disappear the invention belongs to field of welding material more particularly to a kind of 620MPa grade with excellent welding usability and answer
The gas shield welding wire of power.
Background technique
Since the nuclear power developing in China will calculate establishing gas cooled graphite moderated reactor within 1958, have passed through 36 years, and the first of China
Nuclear power station --- Qinshan nuclear power plant just starts power generation to seat.Since 1994, one phase of Qinshan draws respectively with Daya Gulf nuclear power
Into the presurized water reactor unit of two 900,000 kW, Qinshan second phase, three phase of Qinshan, one phase of ridge Australia, ridge Australia are being built later and successively
The nuclear power stations such as second phase, field gulf nuclear power station, Ningde nuclear power station, this, which shows China, can independently build the nuclear power machine of million kilowatt
Group.The current comercial operation unit in China 21, installed capacity 22.3MW, China's nuclear power total power generation only accounts for the 2.7% of total electricity,
Well below the average level in the world 17%.Not only there was only the developed countries such as France, Germany, the U.S., Japan in the world today
Nuclear power is greatly developed, the developing countries such as Brazil, India, Argentina are also using nuclear power as the selection of energy strategy.China's nuclear power
Although larger with world's gap, development space is huge, a piece of light of development prospect.It completely can be with by development China of many years
In two generations of autonomous construction and two generations, add nuclear power station, and tentatively grasp three generation techniques.With the development of China's Construction of Nuclear Electricity, for
The demand of Construction of Nuclear Electricity welding material also can be more and more, nuclear power metal containment as last one of the safety curtain of nuclear power station,
Have an a large amount of demand to high-performance welding material, especially to can the high-performance welding wire of stress-removal processing have urgent requirement, often
Intensity and toughness have different degrees of decline to the prolonged stress-removal processing (600 DEG C × 10h) of the wlding seen afterwards, and nuclear power is pacified
Stress-removal is required when full shell welding treated weld seam tensile strength is not less than 620MPa, -45 DEG C of ballistic work average values of weld seam
Not less than 54J, the ballistic work of individual sample is not less than 47J.It is domestic at present mainly to be welded by the way of welding rod, efficiency
It is slow, and the exploitation of gas shield welding wire can significantly improve welding efficiency.It is applied to the gas shield welding wire kind of nuclear power metal containment at present
Class is also fewer, and domestic some wlding factories all carried out some tests, but effect is less desirable, major problem is that by
- 45 DEG C of weld impingement function after the post weld heat treatment of 600 DEG C × 10h are lower, and fluctuate larger, it is difficult to meet Practical Project and want
It asks.
Patent CN107009047A discloses a kind of high-strength steel gas shielded arc welding solid welding wire, CN104741822A
Disclose a kind of gas shield welding wire, CN101628366 discloses a kind of gas shielded welding wire for high-grade oil pipeline steel and its preparation
Method, CN101116930 disclose high-strength gas-defended welding wire material, CN101112737 discloses a kind of high-strength CO2Gas shield
Welding wire does not have stress-removal to handle the performance data after 600 DEG C × 10h although as-welded deposited metal performance is also more excellent；
Patent CN102689104A disclose it is a kind of for Gas shielded welding wire and wire rod for nuclear containment,
CN102649203A disclose a kind of low cost for Gas shielded welding wire and wire rod for nuclear containment, CN102528318A
A kind of gas shield welding wire for nuclear power is disclosed, used technical solution impact flexibility is slightly worse, and ballistic work surplus is smaller.
Literature search has been carried out with gas shield welding wire for the welding for needing to carry out long-time stress-removal processing.Zhang Xi, Liu Hong,
Guo accounts for mountain et al. and exists《Welding technique》" the Nuclear Safety shell steel SA738 property of welded joint guarantor that 2016.Vol.45 (10) is delivered
It is primarily related to the mode of submerged-arc welding and welding electrode arc welding in barrier technique research ", gas shield welding wire is not referred to；
Zhang Xiaoning, Jing Yi, Yu Yan et al. exist《Heat processing technique》2014.Vol.43 " the nuclear power use (1) delivered
A kind of wlding of manual electric arc welding is primarily related in SA738Gr.B steel manual electric arc welding welding material and technical study "；Liu
It is non-《Welding》It is not right in " application of the GMAW-P automatic welding process in steel containment vessel of nuclear power station " that 2017.No.9 is delivered
Corresponding gas shield welding wire ingredient and performance have mentioned.
Summary of the invention
The gas shield welding wire for the 620MPa grade with excellent welding usability that the purpose of the present invention is to provide a kind of.The welding wire
It is applicable to carry out the welding of the high-quality steel and critical component of the processing of long-time postwelding stress-removal, such as nuclear power steel safety
Shell etc..
Specifically technical solution is：
It is a kind of 620MPa grades can the high-strength gas shield welding wire of stress-removal, contained chemical component is by mass percentage：C：
0.04%~0.07%；Si：0.2%~0.5%；Mn：1.0%~1.5%；Ni：1.5%~2.1%；Mo：0.16%~
0.30%；Ti：0.02%~0.06%；B：0.0005%~0.0020%；S：0.0030%~0.0150%；P≤
0.018%, and the mass percent of each alloying element will meet：The requirement of -65≤a≤- 20, wherein a=-203C-
15.2Ni+44.7Si+31.5Mo-30Mn+700P+400Ti surplus is Fe and inevitable impurity.
It is of the present invention can stress-removal processing high-strength gas shield welding wire ingredient design principle it is as follows：
C：Meeting gap is solid-solution in ferrite in weld seam；C element content has the obdurability and its tissue composition of weld seam
Large effect, strengthening effect inhibit the generation of pro-eutectoid ferrite it is obvious that weld strength can be significantly improved, and promote
The formation of acicular ferrite；But it will substantially reduce impact flexibility and improve ductile-brittle transition temperature, to make welding seam toughness greatly
It reduces.Therefore, the present invention controls C content 0.04%~0.07%.
Si：There is deoxidation and strengthens weld seam matrix strength.The harden ability of weld metal can be improved, inhibit pro-eutectoid
Ferritic generation promotes the formation of acicular ferrite；But Si too high levels can be such that plasticity and toughness declines.Therefore the present invention will
Si content is controlled 0.2%~0.5%.
Mn：It is the effective element of weld seam Strengthening and Toughening, is conducive to deoxidation in weld seam, prevents the iron sulfide for causing fire check
Formation；The harden ability that weld metal can be improved inhibits the generation of pro-eutectoid ferrite, promotes the formation of acicular ferrite.
The intensity that steel can be improved slackens or eliminates the adverse effect of sulphur.To guarantee that deposited metal has suitable harden ability by Mn content
Control is 1.0%~1.5%.
Ni：It is a kind of common element for obtaining superior low-temperature toughness.Harden ability can be improved in it, promotes acicular ferrite
It is formed, the intensity and toughness of weld seam can be improved, especially middle low-temperature impact toughness reduces ductile-brittle transition temperature.Therefore the present invention will
Ni content is controlled 1.5%~2.1%.
Mo：It is the essential element for obtaining high-intensitive weld metal；It has good refinement brilliant as a kind of high-melting-point substances
Grain effect, and plasticity and toughness are damaged less while improving intensity.The harden ability that steel can significantly be improved, prevents Temper brittleness
Property, but On Impact Toughness damage is larger when Mo content is too high.Therefore the present invention controls Mo content 0.16%~0.30%.
Ti：It is a kind of V-N steel element；Ti and C, N affinity are stronger, are easily formed precipitated phase and become forming core matter
The pinning particle of point and crystal boundary achievees the effect that the grain structure for refining steel, to improve the intensity and toughness of weld seam.Ti also with S
Have compared with strong affinity, reach nodularization nonmetal inclusion and improves the uneven purpose of performance.But when Ti content is higher, it will lead to deposition
Precipitate is excessive in metal, influences the performance of stress-removal state.Therefore the present invention controls Ti content 0.02%~0.06%.
B：Ti, B, which is added, in joint in weld seam can inhibit the transformation of pro-eutectoid ferrite, and expand acicular ferrite transformation
Temperature range, and then can get a large amount of acicular ferrite in weld seam, substantially improve the obdurability matching of weld metal；When
It will lead to that deposited metal harden ability is excessively high when B content is excessively high, damage the low-temperature flexibility of deposited metal.Therefore containing B of the invention
Amount control is 0.0005%~0.0020%.
S and P：For harmful element, its content is controlled to improve weld seam degree of purity and welding performance.S and P are easily segregated；Easily
In in intercrystalline formation nonmetal inclusion and Second Phase Particles.The plasticity and toughness that can make steel are decreased obviously, and are answered in welding wire
The content of strict control S, P, but being found by experiment that in welding wire facilitates to improve appearance of weld when containing a certain amount of S, subtracts
The effects of small splashing, therefore the content in welding wire by the content control of S in 0.0030%~0.0150%, P is controlled 0.018%
Below.
According to above each alloys producing feature, the technical solution in the present invention is formd, in the present invention not only
Emphasize that each alloying element should be within the range intervals of defined, and according to formula a=-203C-15.2Ni+44.7Si+
The result that 31.5Mo-30Mn+700P+400Ti is calculated should make a meet -65≤a≤- 20, only as -65≤a≤- 20, obtain
Weld seam metallographic structure in acicular ferrite ratio can reach 80% or more, largely ensure that the as-welded performance of weld seam
Often there is more primary ferrite either in weld seam when the value of a exceeds above range with the performance of postwelding stress-removal state
More M-A constituent element etc., the as-welded performance of weld seam and the performance of postwelding stress-removal state decline to a great extent.
Beneficial effect：
The present invention compared with the existing technology, has the beneficial effect that：
Technical solution in the present invention mainly uses the micro-alloying technology of Ti and B, and by adjusting other elements ingredient
And guarantee -65≤a≤- 20, finally obtaining a kind of deposited metal has excellent as-welded performance and postwelding stress-removal process performance
Gas shield welding wire, deposited metal after the processing of the stress-removal of 600 DEG C × 10h tensile strength not less than 620MPa, -45 DEG C
Ballistic work remains to reach 65J or more.
Specific embodiment
For following embodiment for illustrating the content of present invention, these embodiments are only the general description of the content of present invention,
The content of present invention is not limited.
Table 1 is the specific chemical composition of each embodiment；Table 2 be each embodiment deposited metal is as-welded and postwelding stress-removal
The mechanical property of (600 DEG C × 10h) state；It is 80%Ar+20%CO that deposited metal soldering test, which protects gas,2。
The ingredient wt% of each embodiment of table 1
Note：A=-203C-15.2Ni+44.7Si+31.5Mo-30Mn+700P+400Ti
The deposited metal performance of each embodiment of table 2
From above embodiments it is found that may make the yield strength of welding wire deposited metal not low by the technical solution in the present invention
In 530MPa, tensile strength is not less than 620MPa, and as-welded and stress-removal state (600 DEG C × 10h) -45 DEG C of deposited metal impacts are tough
Property be not less than 70J, the good obdurability matching of welding wire deposited metal, be applicable to carry out long-time postwelding stress-removal processing height
The welding of quality steel and critical component.
Claims (2)
1. a kind of 620MPa grades can stress-removal processing gas shield welding wire, which is characterized in that chemical component is by mass percentage in steel
For：C：0.04%~0.07%；Si：0.2%~0.5%；Mn：1.0%~1.5%；Ni：1.5%~2.1%；Mo：0.16%
~0.30%；Ti：0.02%~0.06%；B：0.0005%~0.0020%；S：0.0030%~0.0150%；P≤
0.018%, remaining is Fe and inevitable impurity.
2. it is as described in claim 1 it is a kind of 620MPa grade can the high-strength gas shield welding wire of stress-removal, which is characterized in that it is contained it is chemical at
The mass percent divided meets the requirement of -65≤a≤- 20, wherein a=-203C-15.2Ni+44.7Si+31.5Mo-30Mn+
700P+400Ti。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892050.3A CN108857141A (en) | 2018-08-07 | 2018-08-07 | 620MPa grade gas protection welding wire capable of eliminating stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892050.3A CN108857141A (en) | 2018-08-07 | 2018-08-07 | 620MPa grade gas protection welding wire capable of eliminating stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108857141A true CN108857141A (en) | 2018-11-23 |
Family
ID=64318393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810892050.3A Pending CN108857141A (en) | 2018-08-07 | 2018-08-07 | 620MPa grade gas protection welding wire capable of eliminating stress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111571061A (en) * | 2020-05-26 | 2020-08-25 | 哈尔滨焊接研究院有限公司 | Gas shielded welding wire |
| CN112427779A (en) * | 2019-08-26 | 2021-03-02 | 宝山钢铁股份有限公司 | Large heat input electro-gas welding method for thick plate |
| CN113798640A (en) * | 2021-09-09 | 2021-12-17 | 包头钢铁（集团）有限责任公司 | Welding method of Q620E high-strength steel |
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| CN102528318A (en) * | 2010-12-17 | 2012-07-04 | 鞍钢股份有限公司 | Gas-shielded welding wire for nuclear power |
| JP2015093287A (en) * | 2013-11-08 | 2015-05-18 | 三菱重工業株式会社 | Weld material for ferrite heat-resistant steel |
| JP2018075613A (en) * | 2016-11-10 | 2018-05-17 | 株式会社神戸製鋼所 | Non-consumable nozzle type electro-slag welding method and method for manufacturing electro-slag weld joint |
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2018
- 2018-08-07 CN CN201810892050.3A patent/CN108857141A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| CN1211285A (en) * | 1996-01-16 | 1999-03-17 | 联合金属公司 | Drawing stock for reinforcing plastic a rubber articles |
| CN1413795A (en) * | 2002-12-25 | 2003-04-30 | 钢铁研究总院 | Super-low carbon high-intensity gas protection welding stick material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112427779A (en) * | 2019-08-26 | 2021-03-02 | 宝山钢铁股份有限公司 | Large heat input electro-gas welding method for thick plate |
| CN111571061A (en) * | 2020-05-26 | 2020-08-25 | 哈尔滨焊接研究院有限公司 | Gas shielded welding wire |
| CN113798640A (en) * | 2021-09-09 | 2021-12-17 | 包头钢铁（集团）有限责任公司 | Welding method of Q620E high-strength steel |
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