CN105252170A - Stainless steel submerged-arc welding strip with improved room temperature tensile strength - Google Patents
Stainless steel submerged-arc welding strip with improved room temperature tensile strength Download PDFInfo
- Publication number
- CN105252170A CN105252170A CN201510607717.7A CN201510607717A CN105252170A CN 105252170 A CN105252170 A CN 105252170A CN 201510607717 A CN201510607717 A CN 201510607717A CN 105252170 A CN105252170 A CN 105252170A
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- Prior art keywords
- room temperature
- stainless steel
- equal
- tensile strength
- welding
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Classifications
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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
-
- 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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a stainless steel submerged-arc welding strip with improved room temperature tensile strength. The stainless steel submerged-arc welding strip with improved room temperature tensile strength comprises the following components by mass percentage: less than or equal to 0.020 of C, 0.30-0.65 of Si, 1.0-2.5 of Mn, less than or equal to 0.01 of S, less than or equal to 0.025 of P, 19.5-21.0 of Cr, 9.0-11.0 of Ni, less than or equal to 0.50 of Mo, less than or equal to 0.50 of Cu, less than or equal to 0.50 of Co, 0.07-0.20 of N and the balance Fe. After welding and thermal treatment, the room temperature mechanical properties of deposited metal is as follows: Rm is greater than or equal to 520Mpa, Rp0.2 is greater than or equal to 260MPa, and A4 is greater than or equal to 35%. Compared with the prior art, the stainless steel submerged-arc welding strip with the improved room temperature tensile strength has the advantages that the room temperature tensile strength of the welding strip is improved, and the manufacturing requirements of AP1000 and AP1400 nuclear power equipment are satisfied.
Description
Technical field
What the present invention relates to is a kind of welding material, particularly a kind of stainless steel submerged-arc welding welding.
Background technology
The manufacture of AP1000 and AP1400 nuclear power generating equipment proposes many new demands to solder technology, such as, in core first device, the stainless steel band pole inner wall overlaying of pressure vessel, voltage-stablizer and evaporimeter low head needs to examine tensile property, its welding method is submerged-arc welding, welding material is EQ308L welding+supporting submerged arc welding flux, its deposited metal needs experience heat treatment (heat treatment temperature is 595 DEG C ~ 620 DEG C), after designing requirement postwelding and heat treatment the room temperature tensile intensity of deposited metal all >=520MPa.Tensile strength after existing welding material postwelding and heat treatment can not meet technical requirement, such as certain enterprise once used multiple business EQ308L welding+supporting submerged arc welding flux to test, under different welding parameters, after deposited metal heat treatment, tensile strength scope is 490MPa ~ 520MPa, can not meet product demand.
Summary of the invention
The deposited metal postwelding that the object of the present invention is to provide a kind of and submerged arc welding flux to be formed and heat treated indices, especially room temperature tensile intensity index can meet the stainless steel submerged-arc welding welding of the raising room temperature tensile intensity of associated specifications.
The object of the present invention is achieved like this:
The mass percent of the stainless steel submerged-arc welding welding of raising room temperature tensile intensity of the present invention is: C≤0.020, Si:0.30-0.65, Mn:1.0-2.5, S≤0.01, P≤0.025, Cr:19.5-21.0, Ni:9.0-11.0, Mo≤0.50, Cu≤0.50, Co≤0.05, N:0.07-0.20, all the other are Fe.
The invention provides the stainless steel submerged-arc welding welding that a kind of composition and performance meet AP1000 and AP1400 technical requirement, be characterized in the deposited metal postwelding that this welding and submerged arc welding flux are formed and heat treated indices, especially room temperature tensile intensity index still meets associated specifications.Postwelding and after heat treatment, deposited metal room-temperature mechanical property is as follows: R
m>=520MPa, R
p0.2>=260MPa, A
4>=35%.
The types of alloys of welding of the present invention is 308L, and corresponding standard-required is the EQ308L welding that Unite States Standard ASMEII rolls up in C section A5.9-2007, and the specific requirement of its chemical composition is in table 1.Standard requires basically identical to the chemical composition of welding, and its common feature does not propose specific requirement to N content.The reason of the deposited metal room temperature tensile intensity deficiency of existing commercial submerged-arc welding EQ308L welding+supporting submerged arc welding flux is caused to be improve the constituent content deficiency of intensity in welding, the especially deficiency of alloying element N content.The N content great majority of existing welding are less than 0.05%, and the tensile strength of its deposited metal, less than 520MPa, can not meet the requirement of AP1000 and AP1400 equipment manufacturing technology.The present invention is by accurately controlling nitrogen content, and suitably control the alloying element that other affects intensity, propose new stainless steel submerged-arc welding welding, its chemical composition meets the requirement of alloy 308L, after postwelding and heat treatment, deposited metal room temperature tensile intensity also meets the technical requirement of AP1000 and AP1400, solves engineering roadblock.
In welding, the effect of essential element is as follows:
C: solution strengthening element, can improve austenitic stainless steel weld joint intensity.But along with content increases, in weld metal, start carbide precipitate, reduce the resistance to corrosion of weld seam.Therefore, the content of C should be≤0.020%.
N: austenite former.Can solution strengthening effect be passed through in stainless steel, improve weld strength.Content is too low, and weld strength is inadequate.Too high levels, because of the deficiency of ferrite content in weld seam, may cause HOT CRACK FOR WELDING P; Also may have little time to discharge because of the N of gas form in welding process, produce the weld defect such as pore or pinhole.Therefore, the content of N should within the scope of 0.07%-0.20%.
The present invention compared with prior art, by adjusting the chemical composition of welding, especially N content is controlled in suitable scope, effectively improve the room temperature tensile intensity of deposited metal, deposited metal properties is met the specification, solves the technical barrier that in the manufacture of AP1000 and AP1400 nuclear power generating equipment, stainless steel band pole submerged arc inner wall overlaying intensity is low.
Detailed description of the invention
Illustrate below and the present invention is described in more detail.
Embodiment 1, the mass percent that stainless steel submerged-arc welding welding divides is: C≤0.10, Si:0.45, Mn:2.23, S≤0.005, P≤0.01, Cr:19.84, Ni:10.42, Mo≤0.01, Cu≤0.01, Co≤0.01, N:0.10, and all the other are Fe.
Embodiment 2, the mass percent that stainless steel submerged-arc welding welding divides is: C≤0., 10, Si:0.40, Mn:1.71, S≤0.006, P≤0.01, Cr:20.73, Ni:10.14, Mo≤0.01, Cu≤0.01, Co≤0.01, N:0.13, and all the other are Fe.
In order to determine applicability of the present invention, selecting 3 kinds of weldings to test, respectively comparative example and invention example being described, the chemical composition of 3 kinds of weldings meets the technical requirement that Unite States Standard ASMEII rolls up C section A5.9-2007 simultaneously, and concrete outcome is in table 1.
Test is 0.5 × 60mm by the specification of 3 kinds of weldings, and supporting solder flux is SJ303HR sintered flux.Welding condition is: welding current 700-800A, arc voltage 25-27V, speed of welding 140mm/min, interlayer temperature≤177 DEG C.Measure deposited metal mechanical property and corrosive nature after postwelding and heat treatment respectively.Technology for Heating Processing is: less than 425 DEG C enter stove, heating-up temperature 608 DEG C, temperature retention time 40 hours, temperature rate be 55 DEG C/h, less than 425 DEG C air coolings of coming out of the stove.Corrosion test is carried out according to the requirement of ASTMA262E method, and 3 kinds of deposited metals are all inclined to without intercrystalline corrosion.Calculate the ferrite content of 3 kinds of deposited metals according to WRC-92 figure method, result of calculation is in table 2.
Table 1 welding chemical composition (wt%)
Table 2 deposited metal test result
Table 2 is the mechanical performance data after comparative example and invention example deposited metal postwelding and heat treatment.As seen from Table 2, the as-welded tensile strength of room temperature of comparative example is only 500MPa, room temperature heat treatment state tensile strength is 510MPa, do not meet claim, the as-welded tensile strength of room temperature of two invention examples is respectively 540MPa and 550MPa, room temperature heat treatment state tensile strength is respectively 530MPa and 570MPa, intensity improves, and meets claim.
Chemical composition in comparison sheet 1 is known, and the C content of three examples is very low, and difference is little, has no significant effect intensity; The N of invention example is higher than comparative example, and from aforesaid analysis, this is the main cause that invention example deposited metal tensile strength improves.
The data result of contrast table 1 and table 2 can find, along with the increase of N content, deposited metal tensile strength increases, and illustrates that suitably controlling N content is improve the Main Means of deposited metal intensity of the present invention.
Claims (3)
1. improve a stainless steel submerged-arc welding welding for room temperature tensile intensity, it is characterized in that mass percent is: C≤0.020, Si:0.30-0.65, Mn:1.0-2.5, S≤0.01, P≤0.025, Cr:19.5-21.0, Ni:9.0-11.0, Mo≤0.50, Cu≤0.50, Co≤0.05, N:0.07-0.20, all the other are Fe.
2. the stainless steel submerged-arc welding welding of raising room temperature tensile intensity according to claim 1, is characterized in that mass percent is: C≤0.10, Si:0.45, Mn:2.23, S≤0.005, P≤0.01, Cr:19.84, Ni:10.42, Mo≤0.01, Cu≤0.01, Co≤0.01, N:0.10, all the other are Fe.
3. the stainless steel submerged-arc welding welding of raising room temperature tensile intensity according to claim 1, is characterized in that mass percent is: C≤0., 10, Si:0.40, Mn:1.71, S≤0.006, P≤0.01, Cr:20.73, Ni:10.14, Mo≤0.01, Cu≤0.01, Co≤0.01, N:0.13, all the other are Fe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510607717.7A CN105252170A (en) | 2015-09-22 | 2015-09-22 | Stainless steel submerged-arc welding strip with improved room temperature tensile strength |
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| CN201510607717.7A CN105252170A (en) | 2015-09-22 | 2015-09-22 | Stainless steel submerged-arc welding strip with improved room temperature tensile strength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483083A (en) * | 2018-11-06 | 2019-03-19 | 哈尔滨威尔焊接有限责任公司 | The method of nuclear power stainless steel band pole submerged arc overlay welding welding, sintered flux and nuclear power stainless steel band pole submerged arc overlay welding |
| CN109514126A (en) * | 2018-11-06 | 2019-03-26 | 哈尔滨威尔焊接有限责任公司 | A kind of molybdenum stainless steel welding and preparation method thereof, sintered flux and preparation method thereof and a kind of single layer strip electrode electroslag surfacing method |
| CN111876680A (en) * | 2020-07-20 | 2020-11-03 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel non-consumable electrode gas protection welding wire and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002336991A (en) * | 2001-05-15 | 2002-11-26 | Nippon Steel Corp | Submerged arc welding method for duplex stainless steel |
| CN101244494A (en) * | 2008-03-28 | 2008-08-20 | 常州华通焊丝有限公司 | Austenitic stainless steel buried arc welding wire for low-temperature equipment |
| CN101318272A (en) * | 2007-06-08 | 2008-12-10 | 江苏兴海特钢有限公司 | Solder wire material for austenitic stainless steel |
| CN101352786A (en) * | 2008-09-27 | 2009-01-28 | 北京金威焊材有限公司 | Submerged arc welding wire for stainless steel |
| CN102019517A (en) * | 2010-12-10 | 2011-04-20 | 哈尔滨威尔焊接有限责任公司 | Novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment |
-
2015
- 2015-09-22 CN CN201510607717.7A patent/CN105252170A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002336991A (en) * | 2001-05-15 | 2002-11-26 | Nippon Steel Corp | Submerged arc welding method for duplex stainless steel |
| CN101318272A (en) * | 2007-06-08 | 2008-12-10 | 江苏兴海特钢有限公司 | Solder wire material for austenitic stainless steel |
| CN101244494A (en) * | 2008-03-28 | 2008-08-20 | 常州华通焊丝有限公司 | Austenitic stainless steel buried arc welding wire for low-temperature equipment |
| CN101352786A (en) * | 2008-09-27 | 2009-01-28 | 北京金威焊材有限公司 | Submerged arc welding wire for stainless steel |
| CN102019517A (en) * | 2010-12-10 | 2011-04-20 | 哈尔滨威尔焊接有限责任公司 | Novel stainless steel submerged-arc welding wire for improving tensile strength after heat treatment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483083A (en) * | 2018-11-06 | 2019-03-19 | 哈尔滨威尔焊接有限责任公司 | The method of nuclear power stainless steel band pole submerged arc overlay welding welding, sintered flux and nuclear power stainless steel band pole submerged arc overlay welding |
| CN109514126A (en) * | 2018-11-06 | 2019-03-26 | 哈尔滨威尔焊接有限责任公司 | A kind of molybdenum stainless steel welding and preparation method thereof, sintered flux and preparation method thereof and a kind of single layer strip electrode electroslag surfacing method |
| CN111876680A (en) * | 2020-07-20 | 2020-11-03 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel non-consumable electrode gas protection welding wire and preparation method thereof |
| CN111876680B (en) * | 2020-07-20 | 2021-06-29 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel non-consumable electrode gas protection welding wire and preparation method thereof |
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Application publication date: 20160120 |