CN104175017A - Stainless-steel gas shielded welding wire for third-generation nuclear main pipelines - Google Patents
Stainless-steel gas shielded welding wire for third-generation nuclear main pipelines Download PDFInfo
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- CN104175017A CN104175017A CN201410409837.1A CN201410409837A CN104175017A CN 104175017 A CN104175017 A CN 104175017A CN 201410409837 A CN201410409837 A CN 201410409837A CN 104175017 A CN104175017 A CN 104175017A
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- welding wire
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
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Abstract
The invention discloses a stainless-steel gas shielded welding wire for third-generation nuclear main pipelines and relates to a welding wire. The welding wire is made of components including, by weight, 0.010-0.030wt% of C, 1.00-2.00wt% of Mn, 0.30-0.65wt% of Si, less than or equal to 0.025wt% of P, less than or equal to 0.010wt% of S, 2.20-3.00wt% of Mo, less than or equal to 0.10wt% of Cu, 18.5-20.0wt% of Cr, 11.0-14.0wt% of Ni, less than or equal to 0.050wt% of Co, 0.020-0.070wt% of N and balance of Fe and impurities. The stainless-steel gas shielded welding wire assorted with E316LN materials of the third-generation nuclear main pipelines takes the place of nuclear power to produce imported products, and localized independent research and development are realized.
Description
Technical field
The present invention relates to a kind of welding wire, the stainless steel gas shield welding wire that is mainly used in welding the nuclear power unit three generations main nuclear power pipeline that corrosion-resistant, high temperature resistant creep rupture strength has relatively high expectations that particularly in a kind of AP1000 of meeting standard and ASME standard, ER316L requires.
Background technology
The energy is the basic industry of national economy, is the important step of restriction China sustained economic development.And nuclear power is safe, the clean and efficient energy, Nuclear Power Development, meets electricity needs for China, and Optimization of Energy Structure ensures energy security, promotes sustained economic development, has very important strategic meaning.But due to the particularity of nuclear power generating equipment service condition, raw material and technique to equipment are had higher requirement.
Core level 316LN main pipeline material is the Novel super-low carbon control nitrogen stainless steel material of developed country's exploitation in recent years, has good stress corrosion resistant, and anti intercrystalline corrosion performance and higher yield strength, be widely used in nuclear reactor.Before this, China is whole dependence on import on the supporting welding material of core level 316LN main pipeline material, seriously restrict the enforcement of national Construction of Nuclear Electricity plan.In recent years, our national nuclear industry development is rapid, and the production domesticization of the required wlding of nuclear power projects becomes a kind of trend.Therefore; development three generations main nuclear power pipeline is built imported product with the supporting stainless steel gas protection welding stick replacing nuclear power of 316LN material; break away from the supporting welding material of three generations's nuclear power station critical equipment to external dependence, realize the exploitation of production domesticization independent studies and there is great strategic importance.
Summary of the invention
The object of the invention is to: a kind of supporting stainless steel gas protection welding stick for three generations's main nuclear power pipeline E316LN material is provided, and replacing nuclear power is built imported product, realize the exploitation of production domesticization independent studies.
The object of the invention realizes by following technical proposals:
For a stainless steel gas shield welding wire for three generations's main nuclear power pipeline, this welding wire composition is by weight percentage:
C?0.010-0.030wt％
Mn?1.00-2.00wt％
Si?0.30-0.65wt％
P≤0.025wt％
S≤0.010wt％
Mo?2.20-3.00wt％
Cu≤0.10wt％
Cr?18.5-20.0wt％
Ni?11.0-14.0wt％
Co≤0.050wt％
N?0.020-0.070wt％
Surplus is Fe and impurity.
In such scheme, some more rare trace elements (as elemental gas O, H etc., non-metallic inclusion alundum (Al2O3) etc.) of being brought into by molten iron when described impurity typically refers to steel-making.
As selection, this welding wire composition is by weight percentage:
Surplus is Fe and impurity.
C?0.010-0.030wt％
Mn?1.40-2.00wt％
Si?0.35-0.55wt％
P≤0.015wt％
S≤0.008wt％
Mo?2.40-3.00wt％
Cu≤0.10wt％
Cr?19.0-20.0wt％
Ni?12.5-13.5wt％
Co≤0.050wt％
N?0.020-0.050wt％
Surplus is Fe and impurity.
As selection, this welding wire composition is by weight percentage:
C 0.013%, Mn 1.68%, Si 0.45%, Cr 19.5%, Ni 12.9%, Mo 2.59%, Co 0.007%, Cu 0.005%, S 0.004%, P 0.006%, N 0.025%, surplus are Fe and impurity.
As selection, this welding wire composition is by weight percentage:
C 0.019%, Mn 1.78%, Si 0.49%, Cr 19.7%, Ni 13.2%, Mo 2.67%, Co 0.008%, Cu 0.006%, S 0.003%, P 0.005%, N 0.036%, surplus are Fe and impurity.
As selection, this welding wire composition is by weight percentage:
C 0.025%, Mn 1.81%, Si 0.48%, Cr 19.8%, Ni 13.4%, Mo 2.77%, Co 0.002%, Cu 0.004%, S 0.004%, P 0.005%, N 0.045%, surplus are Fe and impurity.
The principle of the invention:
The use particularity of three generations's main nuclear power pipeline for nuclear power, its corresponding welding material is proposed to higher requirement, at present, the common ER316L type welding wire of prior art cannot meet, and how to ensure that high-temperature behavior, anti intercrystalline corrosion performance and the cracking resistance of weld metal is the difficult point of this patent.
For meeting nuclear power three generations's main nuclear power pipeline E316LN material welding application requirements, in weld metal, control the intensified elements such as C, Mo, N, ensure the requirement of strength of the drawing by high temperature of weld seam.
Control ferrite number in the element such as S, P, Cu, Co in welding wire and weld metal simultaneously, ensured corrosion resistance and the cracking resistance of weld seam.
C: carbon is strong formation and stable austenite and expand the element of austenitic area in austenitic stainless steel, carbon forms austenitic ability and is about 30 times of nickel.Carbon is a kind of interstitial element, can significantly improve the intensity of austenitic stainless steel.But carbon can form with chromium the Cr of Gao Ge at austenitic stainless steel
23c
6type carbide, thus the dilution of local chromium caused, and the corrosion resistance that makes steel particularly intergranular corrosion resistance performance declines.Therefore by carbon content control at 0.010%-0.030%.
Cr: chromium is topmost alloying element in austenitic stainless steel, the rustless property of austenitic stainless steel and corrosion proof acquisition are mainly due under medium effect, chromium has promoted the passivation of steel and has made steel keep stablizing the result of passive state.Chromium is strongly to form and stablize ferritic element, dwindles austenitic area.What chromium had the greatest impact to performance of austenitic stainless steel is corrosion resistance, the main oxidative resistance medium of steel and the performance of acid chloride medium of improving, under the effect that meets of nickel and molybdenum and copper, chromium improves the performance of the more resistance to reductants of steel, organic acid, urea and alkaline media; Also improve the resistance to local corrosion of steel, such as the performance of stress corrosion under intercrystalline corrosion, spot corrosion, crevice corrosion and some condition.But in the time containing molybdenum in steel, chromium content increases the formation that can promote χ phase, not only reduce the moulding of steel, toughness, also can under some conditions, reduce the corrosion resistance of steel.So, need the suitably content range of control chromium.
Ni: nickel is topmost alloying element in austenitic stainless steel, its Main Function is to form and stable austenite, thereby make steel there is the cooperation of good whole step and plasticity, toughness, and there is good hot and cold processability and cold formability and welding, low temperature and without performances such as magnetic.Along with the increase of nickel content, the strength decreased of steel and plasticity improve, and the thermodynamic stability of steel increases.But the raising of nickel content, its Critical Carbon content that produces intercrystalline corrosion reduces, and the Susceptibility To Intergranular Corrosion of steel increases.So, need the suitably content range of control nickel.
Mo: molybdenum is formation and stable ferrite the element that expands ferrite phase region, and it is suitable with chromium that molybdenum forms ferritic ability.Molybdenum also promotes intermetallic phase in austenitic stainless steel, and such as the precipitation of χ phase, the corrosion resistance to steel and mechanical property all can have a negative impact, and particularly causes plasticity, toughness to decline.Adding room-temperature mechanical property impact of molybdenum is little, and still, along with the increase of molybdenum content, elevated temperature strength improves.Therefore, molybdenum content is controlled to 2.20%-3.00%.
N: nitrogen is to form very consumingly and stable austenite and expand the element of austenite phase region, the effect of nitrogen is except replacing part of nickel to save valuable nickel element, be mainly to improve the intensity of austenitic stainless steel as solution strengthening element, but significantly do not damage plasticity and toughness.Meanwhile, appropriate nitrogen can improve the performance of austenitic stainless steel intergranular corrosion resistance and intergranular stress corrosion.So Control of Nitrogen Content is at 0.010%-0.070%.
S and P: sulphur and phosphorus are mainly regarded as harmful element in austenitic stainless steel.The illeffects of sulphur is mainly the thermoplasticity that reduces austenitic stainless steel, and sulphur reduces the corrosion resistance of austenitic stainless steel simultaneously.Phosphorus significantly reduces the performance of chromiumnickel austenite stainless steel resistance to various red fuming nitric acid (RFNA) corrosion under solid solution and Sensitized.Therefore, sulfur content is controlled at≤0.010%, phosphorus content is controlled at≤0.025%.
Beneficial effect of the present invention:
The welding wire for gas shielded welding welding deposited metal composition analysis of the present invention's protection, ray detection, tension test, intercrystalline corrosion all meet the particular/special requirement of nuclear power; welding deposited metal is under as-welded and condition of heat treatment; tensile strength (Rm), yield strength (Rp0.2) under 350 DEG C of conditions of normal temperature and high temperature, (A) is good for percentage elongation, meets the requirement of ER316L in AP1000 standard and ASME standard.There is the premium properties such as the intensity close with main pipeline body, high-ductility, good anti intercrystalline corrosion, can effectively improve the feature such as security, life-span of main pipeline.
Welding wire spatter of the present invention is little, and molten iron flow is good.
The gas protecting welding wire welding wire of the present invention protection can be used for the welding of nuclear power unit main pipeline of reactor, pressure vessel and corresponding construction that corrosion-resistant, high temperature resistant creep rupture strength has relatively high expectations.
Detailed description of the invention
Following non-limiting examples is used for illustrating the present invention.
Comparative example 1
The present embodiment does not adopt the present invention to design, component of weld wire and weight percent content are that C 0.005%, Mn 1.22%, Si0.42%, Cr 18.47%, Ni 11.58%, Mo 2.11%, Co 0.087%, Cu 0.014%, S 0.024%, P 0.029%, N 0.009%, surplus are Fe and impurity.
This welding wire can protect welding wire production technology to make according to conventional gas.
The stainless steel gas protection welding stick of the main nuclear power pipeline of gained 1 is carried out to Ultra-low carbon 022Cr19Ni10 stainless steel welding experiment, and deposited metal ferrite number FN is measured as by NB-2433 method of magnetic: 5.9; Standard according to AWS B4.0M and ASTM E21 has been carried out mechanical property detection, and the mechanical property of deposited metal under as-welded normal temperature is in table 1
Table 1 deposited metal mechanical property
It is that austenite adds delta ferrite that metallographic test is analyzed seam organization, and seam organization is normal; Deposited metal has intercrystalline corrosion tendency, and ray detection is qualified.
The alloying element control of the present embodiment is not within the present invention requires, and 350 DEG C of high temperature tensile properties of its deposited metal and corrosion among crystalline grains all can not meet the technical requirement of nuclear power with three generations's main nuclear power pipeline.
Embodiment 1:
Design component of weld wire and weight percent content is by requirement of the present invention, C 0.013%, Mn 1.29%, Si 0.35%, Cr 18.8%, Ni 11.4%, Mo 2.32%, Co 0.007%, Cu 0.005%, S 0.004%, P 0.006%, N 0.025%, surplus are Fe and impurity.
This welding wire can protect welding wire production technology to make according to conventional gas.
The stainless steel gas protection welding stick of the main nuclear power pipeline of gained 1 is carried out to Ultra-low carbon 022Cr19Ni10 stainless steel welding experiment, and deposited metal ferrite number FN is measured as by NB-2433 method of magnetic: 9.7; Standard according to AWS B4.0M and ASTM E21 has been carried out mechanical property detection, the mechanical property table 2 of deposited metal under as-welded normal temperature
Table 2 deposited metal mechanical property
It is that austenite adds delta ferrite that metallographic test is analyzed seam organization, and seam organization is normal; Deposited metal is inclined to without intercrystalline corrosion, and ray detection is qualified.
The alloying element of the present embodiment is controlled within the present invention requires, and its deposited metal mechanical property all meets the technical requirement of nuclear power with three generations's main nuclear power pipeline.
Embodiment 2:
Design component of weld wire and weight percent content is by requirement of the present invention, C 0.019%, Mn 1.58%, Si 0.49%, Cr19.3%, Ni 12.6%, Mo 2.57%, Co 0.018%, Cu 0.014%, S 0.006%, P 0.009%, N 0.036%, surplus are Fe and impurity.
This welding wire can protect welding wire production technology to make according to conventional gas.
The stainless steel gas protection welding stick of the main nuclear power pipeline of gained 2 is carried out to Ultra-low carbon 022Cr19Ni10 stainless steel welding experiment, and deposited metal ferrite number FN is measured as by NB-2433 method of magnetic: 8.8; Standard according to AWS B4.0M and ASTM E21 has been carried out mechanical property detection, and the mechanical property of deposited metal under as-welded normal temperature is in table 3
Table 3 deposited metal mechanical property
It is that austenite adds delta ferrite that metallographic test is analyzed seam organization, and seam organization is normal; Deposited metal is inclined to without intercrystalline corrosion, and ray detection is qualified.
The alloying element of the present embodiment is controlled within the present invention requires, and its deposited metal mechanical property all meets the technical requirement of nuclear power with three generations's main nuclear power pipeline.
Embodiment 3:
Design component of weld wire and weight percent content is by requirement of the present invention, C 0.025%, Mn 1.81%, Si 0.58%, Cr19.8%, Ni 13.4%, Mo 2.77%, Co 0.034%, Cu 0.062%, S 0.008%, P 0.012%, N 0.045%, surplus are Fe and impurity.
This welding wire can protect welding wire production technology to make according to conventional gas.
The stainless steel gas protection welding stick of the main nuclear power pipeline of gained 2 is carried out to Ultra-low carbon 022Cr19Ni10 stainless steel welding experiment, and deposited metal ferrite number FN is measured as by NB-2433 method of magnetic: 9.2; Standard according to AWS B4.0M and ASTM E21 has been carried out mechanical property detection, and the mechanical property of deposited metal under as-welded normal temperature is in table 4
Table 3 deposited metal mechanical property
It is that austenite adds delta ferrite that metallographic test is analyzed seam organization, and seam organization is normal; Deposited metal is inclined to without intercrystalline corrosion, and ray detection is qualified.
The alloying element of the present embodiment is controlled within the present invention requires, and its deposited metal mechanical property all meets the technical requirement of nuclear power with three generations's main nuclear power pipeline.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. for a stainless steel gas shield welding wire for three generations's main nuclear power pipeline, it is characterized in that this welding wire composition is by weight percentage:
C?0.010-0.030wt％
Mn?1.00-2.00wt％
Si?0.30-0.65wt％
P≤0.025wt％
S≤0.010wt％
Mo?2.20-3.00wt％
Cu≤0.10wt％
Cr?18.5-20.0wt％
Ni?11.0-14.0wt％
Co≤0.050wt％
N?0.020-0.070wt％
Surplus is Fe and impurity.
2. the stainless steel gas shield welding wire for three generations's main nuclear power pipeline as claimed in claim 1, is characterized in that this welding wire composition is by weight percentage:
C?0.010-0.030wt％
Mn?1.40-2.00wt％
Si?0.35-0.55wt％
P≤0.015wt％
S≤0.008wt％
Mo?2.40-3.00wt％
Cu≤0.10wt％
Cr?19.0-20.0wt％
Ni?12.5-13.5wt％
Co≤0.050wt％
N?0.020-0.050wt％
Surplus is Fe and impurity.
3. the stainless steel gas shield welding wire for three generations's main nuclear power pipeline as claimed in claim 1, is characterized in that this welding wire composition is by weight percentage:
C 0.013%, Mn 1.29%, Si 0.35%, Cr 18.8%, Ni 11.4%, Mo 2.32%, Co 0.007%, Cu 0.005%, S 0.004%, P 0.006%, N 0.025%, surplus are Fe and impurity.
4. the stainless steel gas shield welding wire for three generations's main nuclear power pipeline as claimed in claim 1, is characterized in that this welding wire composition is by weight percentage:
C 0.019%, Mn 1.58%, Si 0.49%, Cr 19.3%, Ni 12.6%, Mo 2.57%, Co 0.018%, Cu 0.014%, S 0.006%, P 0.009%, N 0.036%, surplus are Fe and impurity.
5. the stainless steel gas shield welding wire for three generations's main nuclear power pipeline as claimed in claim 1, is characterized in that this welding wire composition is by weight percentage:
C 0.025%, Mn 1.81%, Si 0.58%, Cr 19.8%, Ni 13.4%, Mo 2.77%, Co 0.034%, Cu 0.062%, S 0.008%, P 0.012%, N 0.045%, surplus are Fe and impurity.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772576A (en) * | 2015-03-20 | 2015-07-15 | 机械科学研究院哈尔滨焊接研究所 | 308L submerged arc welding wire with improved 350-DEG C high-temperature tensile strength |
| CN106392376A (en) * | 2016-12-15 | 2017-02-15 | 昆山京群焊材科技有限公司 | Extremely-low-carbon high-corrosion-resistance austenitic stainless steel welding rod |
| CN109702382A (en) * | 2018-12-27 | 2019-05-03 | 浙江富春江水电设备有限公司 | A kind of welding material and its welding method of the military service for a long time of suitable hot conditions |
| CN111575606A (en) * | 2020-05-08 | 2020-08-25 | 徐州优尚精密机械制造有限公司 | High-strength wear-resistant stainless steel casting and preparation process thereof |
| CN113319469A (en) * | 2021-06-30 | 2021-08-31 | 桂林航天工业学院 | High-strength heat-resistant steel gas shielded welding wire and preparation method thereof |
| US20220281038A1 (en) * | 2019-11-26 | 2022-09-08 | Esab Seah Corp. | Stainless steel welding wire for use in lng tank manufacturing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772576A (en) * | 2015-03-20 | 2015-07-15 | 机械科学研究院哈尔滨焊接研究所 | 308L submerged arc welding wire with improved 350-DEG C high-temperature tensile strength |
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| CN109702382A (en) * | 2018-12-27 | 2019-05-03 | 浙江富春江水电设备有限公司 | A kind of welding material and its welding method of the military service for a long time of suitable hot conditions |
| US20220281038A1 (en) * | 2019-11-26 | 2022-09-08 | Esab Seah Corp. | Stainless steel welding wire for use in lng tank manufacturing |
| CN111575606A (en) * | 2020-05-08 | 2020-08-25 | 徐州优尚精密机械制造有限公司 | High-strength wear-resistant stainless steel casting and preparation process thereof |
| CN111575606B (en) * | 2020-05-08 | 2021-12-17 | 徐州优尚精密机械制造有限公司 | High-strength wear-resistant stainless steel casting and preparation process thereof |
| CN113319469A (en) * | 2021-06-30 | 2021-08-31 | 桂林航天工业学院 | High-strength heat-resistant steel gas shielded welding wire and preparation method thereof |
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