CN102962602A - Ultrahigh-strength full-austenite stainless steel welding wire - Google Patents
Ultrahigh-strength full-austenite stainless steel welding wire Download PDFInfo
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Abstract
The invention provides an ultrahigh-strength full-austenite stainless steel welding wire, comprising the following chemical components in mass percentage of: 0.05-0.11% of C, 0.50-0.90% of Si, 4.0-6.0% of Mn, 16.0-19.0% of Cr, 19.0-22.0% of Ni, 5.0-6.5% of Mo, 0.25-0.35% of N, 0.15-0.30% of V, less than or equal to 0.010% of S, less than or equal to 0.015% of P and the residue of Fe. The smelting metal of the welding wire not only has the ultrahigh tensile strength, but also has good toughness; the tensile strength Rm is 735-790 MPa and KV2 reaches to 110-140 J at 20 DEG C below zero; the manufacturability is good; compared with a previously-matched manual electric welding strip, the welding efficiency of the welding wire is improved by more than 100%; and the welding without pre-heating at higher than 0 DEG C is realized and a welding process is simplified.
Description
Technical field
The present invention relates to a kind of welding wire art field, particularly a kind of superhigh intensity full austenite stainless steel gas metal-arc welding technique welding wire.
Background technology
The 10CrNi5MoV steel is 780MPa grade high-strength low-alloy steel, in boats and ships and weaponry extensive application is arranged, but because this steel alloying degree is high, HSLA STEEL TO WELD and cold crack are very responsive.For guaranteeing the safety of structure, the prevention welding cold cracking produces, and the welding at large rigidity, contained greatly position must be adopted the full austenite wlding.The supporting of 10CrNi5MoV steel is the Manual electric welding bar with the full austenite wlding at present, and this welding rod is through improving for many years, and its manufacturability is greatly improved, and has been used for real ship and built.But there is several respects major issue in this welding rod: (1) welding efficiency is low; (2) the arc blow phenomenon is serious, welding operation difficulty, and especially vertical position welding, overhead position operation easier are large, and welder's labour intensity is large; (3) welding procedure is complicated, and the palpus preheating is 50～130 ℃ before the weldering.
Adopt gas metal-arc welding technique can solve this several respects problem, and the key of this technique is supporting development with austenitic stainless steel welding wire.Because weld metal has very high obdurability requirement, desired strength reaches more than the 705MPa, toughness reaches more than the 83J, retrieves the patent of present stainless steel welding stick, not yet finds the full austenite welding wire that can satisfy this obdurability requirement.
The patent of existing austenitic stainless steel welding wire, intensity is lower or toughness does not reach requirement or weld metal is not fully austenitic structure.Be " austenite-ferrite stainless steel gas protection welding wire " patent of 200710120683.4 such as application number, its seam organization contains the ferrite about 20%, and deposited metal tensile strength is 640MPa, and-40 ℃ of ballistic works only are about 55J; Application number is " stainless steel ultralow-carbon austenitic welding wire material for welding " patent of 201110249532.5, and its deposited metal tensile strength is 580～620MPa; Application number is " a kind of solder wire material for austenitic stainless steel " patent of 201110249534.4, and its deposited metal tensile strength is 560～680MPa; Application number is " a kind of stainless steel welding stick and welding procedure thereof " patent of 200810040897.5, and its deposited metal tensile strength is 960～1020MPa, but its-40 ℃ of ballistic works only are about 33J; Application number is " austenitic stainless steel gas shield welding wire for vehicle " patent of 200710025258.7, adopt suitable C, Si, the alloying elements such as Mn, Cr to form a certain amount of acicular ferrite and improve welding toughness in the welding wire, its seam organization is not full austenite, and intensity lower (545MPa) can not satisfy high-intensity requirement; Application number is the patent of 99117834.3 " a kind of welding wire of low Cr and high Mn austenitic steel ", this welding wire adopts low Cr and high Mn, and add the generation that the units such as Mo, Ti usually reduce and joint fused interface both sides increase C layer (weld seam one side), poor C layer (mother metal one side) when suppressing to weld the Cr5Mo steel, improve the service life of member, but its intensity is lower, can only reach 345MPa; Application number is 200710100039.0 patent " a kind of nickel-saving type austenitic stainless steel welding wire ", after in welding wire, adding nitrogen, in the welding wire nickel content 2%, reduced the welding wire cost, and make the intensity of deposited metal improve 150MPa, low-temperature impact toughness has improved more than the 30J, but this welding wire is to develop its Ni for the ferritic stainless steel of high-Cr
EqVery low (only being about 9), because martensitic structure can appear in the diluting effect weld seam of mother metal, very sensitive to welding cold cracking when being used for welding 10CrNi5MoV steel, can not satisfy the welding requirements of large rigidity structure.
Summary of the invention
Technical problem to be solved by this invention provides a kind of superhigh intensity full austenite stainless steel welding stick, welding efficiency is high, manufacturability is excellent, crack resistance is good, the problem that the existing welding wire of solution exists more is applicable to large rigid structure welding and the difficult welding of welding steel grade of high strength and high hardness that high-strength and high-ductility is had relatively high expectations.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of superhigh intensity full austenite stainless steel welding stick of the present invention, be characterised in that: the chemical composition mass percent consists of: C:0.05～0.11%, Si:0.50～0.90%, Mn:4.0～6.0%, Cr:16.0～19.0%, Ni:19.0～22.0%, Mo:5.0～6.5%, N:0.25～0.35%, V:0.15～0.30%, S≤0.010, P≤0.015%, all the other are Fe.
The present invention is directed to 780MPa level 10CrNi5MoV composition of steel and gas shielded welding progress characteristics, the full austenite gas protecting welding wire is carried out Composition Design, in restriction C content situation, mainly adopt the elements such as N, Mo, V to strengthen; With reference to the WRC-1992 phase component figure that revises with the martensite border, control Cr
EqWith Ni
EqSeam organization can access full austenite when guaranteeing welding 10CrNi5MoV steel.Each alloying element in the welding wire all is on the basis to the analysis of its effect, carries out the design of different content, has determined the ultimate constituent of welding wire through a large amount of welding wires trial-productions.
C is one of metal strengthening effective element, in order to reach the superhigh intensity grade, a certain amount of C element is absolutely necessary, but too high C content not only makes the elements such as C and Cr form carbide easily, form the corrosive nature that poor chromium district reduces deposited metal, and impact property also is subjected to certain influence, and too high C content also has hot cracking tendency in welding process simultaneously.Good for guaranteeing combination property, stipulate to be limited to 0.05% under it, on be limited to 0.11%.
Si helps to improve the flowability of molten steel on the one hand, can also improve the wettability of droplet metal simultaneously, and this manufacturability to welding wire has material impact; Si also helps to be combined with oxygen to form the slag come-up on the other hand, thereby reduces the content of oxygen in the weld seam, and the deoxidation of Si is necessary in active gas shielded arc welding technique (MAG).But Si content forms Ni-Si low melting point phase than Gao Shiyi, and the fire check in the Resistance of Weld Metal has material impact, usually will limit the content of Si for this reason.Therefore the content of Si is controlled at 0.50～0.90%.
The effect of Mn has following several respects: the one, and the solubility of raising N, adding Mn is conducive to contain the melting of N welding wire, in the higher composition of N content, must add high Mn element, the 2nd, Mn can make low-melting iron sulfide change dystectic manganese sulfide into, the hot cracking tendency of minimizing in the full austenite weld seam, the 3rd, Mn is intensified element, and Mn is again austenite stabilizer element simultaneously, can impel the austenite under the high temperature to remain to normal temperature.In addition, Mn also has deoxidation in the molten bath, is important deoxidant element for the MAG technique Mn that adopts active gases.Final definite Mn content is 4.0%～6.0%.
Cr adds for guaranteeing that weld metal has certain corrosion resistance and controls seam organization, and too high or mistake is hanged down all can not reach good obdurability coupling.In addition, the Cr element can promote the solubility of N in the Fe-Ni-Cr alloy, and the solubility of N increases fast along with the increase of Cr content.Determine that Cr content is 16.0%～19.0%.
Ni is austenite former, and can improve Metal.In order to guarantee that weld metal has certain plasticity and toughness, should add an amount of Ni element in the composition system.The content of Cr, Ni element also is used for controlling Creq and Nieq ratio in the weld seam, guarantees that weld metal is fully austenitic structure.Determine that Ni content is 19.0%～22.0%.
Mo is that strengthening effect will be higher than Mn, need suitably to strengthen its content for improving intensity, lower limit is controlled to be 5.5%, but when Mo content exceeds its solid solubility in austenitic weld seam, can form carbide reduction crystal boundary at austenite grain boundary, greatly reduce weld strength and toughness, determine that finally its content is 5.0%～6.5%.
N is the important reinforced alloys element that this welding wire has superhigh intensity.Studies show that, add 0.10% nitrogen and can make the room temperature strength of Cr, Ni austenitic stainless steel improve about 60～100MPa.Studies show that a large amount of addings of nitrogen can make austenitic stainless steel reach very high intensity, make its range of application more extensive.The yield strength of nitrogenous steel is comprised of three parts, and namely matrix strength, nitrogen-atoms gap are solid-solubilized in the austenite face-centered cubic lattice and the intercrystalline strengthening and the solution strengthening that cause.Pickering etc. studies show that the solid solution of nitrogen in austenite increased austenitic intensity strongly, and in austenitic steel, the reinforcement ability of nitrogen is about 1.6 times of carbon, 18 times of titanium, 45 times of molybdenum.Nitrogen is very effective solution strengthening element in austenitic stainless steel.In welding wire of the present invention according to its strengthening effect and its content of solubility control 0.25～0.35%.In addition, N forms and stable austenite and enlarge the element of austenitic area very consumingly, and nitrogen has very high solubility in austenitic stainless steel, and high Cr and high Mn content can increase its solubility, thus must contain higher Cr in the welding wire, the Mn element.
V element has stronger solution strengthening effect, also can improve the N element in the solubility of austenitic weld metal simultaneously, and can control the V content range according to result of the test is 0.15%～0.30%.
S, P are the elements the most harmful to fire check, answer its content of reduce, consider the welding wire smelting cost, and upper control limit is respectively 0.010%, 0.015%.
The preparation of welding wire of the present invention is identical with prior art processes, at first prepare burden according to design mix of the present invention, carry out electroslag remelting after adopting induction furnace to smelt, then to ingot casting forge, wherein to forge initial forging temperature be that 1100 ℃, finish-forging are 920 ℃ in the processing such as hot rolling and drawing, the hot rolling start rolling temperature is that 1140 ℃, finish to gauge are 1000 ℃, roll into the 30mm square billet through several time, roll into again the wire rod of 5.5mm through more than ten passages; To be 1.0mm finished product welding wire through 4 annealing in process (900～1000 ℃), 7 drawings during cold-drawn, require last several passage to carry out surface clean in the Cold Drawing Process.
By adopting technique scheme, the present invention has following beneficial effect:
(1) deposited metal of welding wire of the present invention not only has the tensile strength of superelevation, and has good toughness, tensile strength R
mBe 735～790MPa ,-20 ℃ of KV
2Reach 110～140J.
(2) welding wire process of the present invention is good, compares with former supporting Manual electric welding bar, adopts this welding wire welding efficiency to improve more than 100%.
(3) welding wire of the present invention has been realized not pre-thermal weld more than 0 ℃, has simplified welding procedure.
Welding wire of the present invention has the characteristics of high strength, high tenacity, and welding procedure is good, can be used for the welding of the supporting casting forged steel of submarine important structure and pressure hull, also can be used for the welding of high strength armour steel.Civilian aspect, this welding wire can be used for the large rigid structure welding of the large wall thickness such as big machinery, pressure vessel, also can be used for the welding of the difficult welding of high strength and high hardness steel grade.Therefore, the present invention has preferably market prospects, is a kind of welding material that is worthy to be popularized.
This welding wire can be applicable to all-position welding, and welding quality is good, has also significantly improved welding efficiency simultaneously.When repeatedly this welding wire welding 10CrNi5MoV steel was adopted in the performance evidence, weld metal intensity reached more than the 705MPa, toughness reaches more than the 83J, satisfies the performance indications requirement, and had realized pre-thermal weld more than 0 ℃, had simplified welding procedure.
Description of drawings
Fig. 1 is the weld seam metallographic structure photo (500 *) of embodiment 1.
Fig. 2 is the weld seam metallographic structure photo (500 *) of embodiment 3.
The specific embodiment
Below in conjunction with embodiment this patent is further explained.But the protection domain of this patent is not limited to concrete embodiment.
The chemical composition of used embodiment welding wire sees Table 1, and the welding wire specification is φ 1.0mm.The test steels plate is the thick 10CrNi5MoV steel of 26mm, and welding procedure sees Table 2, adopts 95%Ar+5%CO
2Make protection gas, this connects efficient raising correction data and sees Table 3.
The chemical composition of table 1 welding wire of the present invention (wt%)
| ? | C | Si | Mn | Cr | Ni | Mo | N | V | S | P | Fe |
| Embodiment 1 | 0.053 | 0.54 | 4.65 | 15.50 | 21.43 | 5.56 | 0.255 | 0.153 | 0.0066 | 0.011 | Surplus |
| Embodiment 2 | 0.091 | 0.90 | 5.08 | 16.02 | 19.06 | 5.10 | 0.304 | 0.220 | 0.0092 | 0.006 | Surplus |
| Embodiment 3 | 0.078 | 0.50 | 4.65 | 18.05 | 21.36 | 5.18 | 0.284 | 0.181 | 0.010 | 0.012 | Surplus |
| Embodiment 4 | 0.108 | 0.85 | 5.85 | 19.01 | 22.00 | 5.30 | 0.284 | 0.282 | ＜0.001 | 0.014 | Surplus |
| Embodiment 5 | 0.068 | 0.71 | 4.22 | 17.52 | 21.07 | 6.45 | 0.349 | 0.175 | 0.005 | 0.009 | Surplus |
Table 2 test plate (panel) welding conditions
| Welding current/A | Weldingvoltage/V | Speed of welding/cmmin -1 | Protective gas | Gas flow/l |
| 180～200 | 26～28 | 35～40 | Ar+5％CO 2 | 10～20 |
The contrast of table 3 welding efficiency
Test butt welded seam tissue is analyzed, and the weld seam metallographic structure of several embodiment is identical, all is full austenites, and Fig. 1, Fig. 2 are respectively the weld seam metallographic structure of embodiment 1, embodiment 3.
Weld metal mechanical property test, joint toughness test and cup-shaped pipe fitting cracking test weld cracking expreiment have been carried out in test, and the result is as shown in table 4.Cup-shaped pipe fitting cracking test result shows that this welding wire crackle do not occur under 0 ℃+80%RH environment, non-preheating condition, has realized not pre-thermal weld more than 0 ℃, has simplified welding procedure.
Table 4 experimental test result
Annotate: the thick 10CrNi5MoV steel plate of 26mm is adopted in weld metal mechanical property test, joint toughness test; Cracking test adopts the thick 10CrNi5MoV steel plate of 60mm and φ 170mm * φ 40mm * 250mm(external diameter * wall thickness * length) the cup-shaped pipe fitting cracking test of supporting forged steel.The joint toughness test data is respectively three test values and a mean value.
Claims (1)
1. superhigh intensity full austenite stainless steel welding stick, it is characterized in that: welding wire chemical composition mass percent consists of: C:0.05～0.11%, Si:0.50～0.90%, Mn:4.0～6.0%, Cr:16.0～19.0%, Ni:19.0～22.0%, Mo:5.0～6.5%, N:0.25～0.35%, V:0.15～0.30%, S≤0.010, P≤0.015%, all the other are Fe.
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Cited By (13)
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|---|---|---|---|---|
| EP2862666A3 (en) * | 2013-10-18 | 2016-01-06 | MT Aerospace AG | Method for welding of chrome-nickel steels using a welding additive with composition tailored to the base material |
| CN105537795A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Welding wire for welding urea |
| CN107717260A (en) * | 2017-11-16 | 2018-02-23 | 北京北冶功能材料有限公司 | A kind of coal fired power plant stainless steel welding stick and preparation method thereof |
| CN110369910A (en) * | 2019-08-28 | 2019-10-25 | 哈尔滨威尔焊接有限责任公司 | A kind of deposited metal of fast reactor stainless steel electrode |
| CN112192000A (en) * | 2020-08-21 | 2021-01-08 | 江阴兴澄特种钢铁有限公司 | Welding process of ultrahigh-strength steel plate with yield strength of not less than 1250MPa |
| CN112621021A (en) * | 2020-12-26 | 2021-04-09 | 江苏新核合金科技有限公司 | H0Cr19Ni24Mn7Mo6VN welding wire and preparation method thereof |
| CN113146095A (en) * | 2021-03-01 | 2021-07-23 | 哈尔滨威尔焊接有限责任公司 | Special welding material for austenite high-alloy steel and application |
| CN113798728A (en) * | 2021-09-14 | 2021-12-17 | 哈尔滨威尔焊接有限责任公司 | Austenitic stainless steel welding wire and preparation method and application thereof |
| RU2768949C1 (en) * | 2021-04-16 | 2022-03-25 | Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) | Welding wire with high nitrogen content |
| CN114959516A (en) * | 2022-05-25 | 2022-08-30 | 北京科技大学 | Stainless steel wire and preparation method thereof |
| CN115401362A (en) * | 2022-10-12 | 2022-11-29 | 中国原子能科学研究院 | Liquid lead-bismuth corrosion resistant super austenitic stainless steel welding wire and application thereof |
| CN115502610A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire steel wire containing vanadium and titanium for high-strength steel, welding wire for high-strength steel and production method of welding wire |
| RU2796567C1 (en) * | 2022-05-19 | 2023-05-25 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | WIRE MARK “Св-08Х21Н10М2Г4АФБ” FOR WELDING HIGH-STRENGTH STEEL |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2862666A3 (en) * | 2013-10-18 | 2016-01-06 | MT Aerospace AG | Method for welding of chrome-nickel steels using a welding additive with composition tailored to the base material |
| CN105537795A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Welding wire for welding urea |
| CN107717260A (en) * | 2017-11-16 | 2018-02-23 | 北京北冶功能材料有限公司 | A kind of coal fired power plant stainless steel welding stick and preparation method thereof |
| CN110369910A (en) * | 2019-08-28 | 2019-10-25 | 哈尔滨威尔焊接有限责任公司 | A kind of deposited metal of fast reactor stainless steel electrode |
| CN112192000A (en) * | 2020-08-21 | 2021-01-08 | 江阴兴澄特种钢铁有限公司 | Welding process of ultrahigh-strength steel plate with yield strength of not less than 1250MPa |
| CN112621021A (en) * | 2020-12-26 | 2021-04-09 | 江苏新核合金科技有限公司 | H0Cr19Ni24Mn7Mo6VN welding wire and preparation method thereof |
| CN113146095A (en) * | 2021-03-01 | 2021-07-23 | 哈尔滨威尔焊接有限责任公司 | Special welding material for austenite high-alloy steel and application |
| RU2768949C1 (en) * | 2021-04-16 | 2022-03-25 | Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) | Welding wire with high nitrogen content |
| CN113798728A (en) * | 2021-09-14 | 2021-12-17 | 哈尔滨威尔焊接有限责任公司 | Austenitic stainless steel welding wire and preparation method and application thereof |
| RU2796567C1 (en) * | 2022-05-19 | 2023-05-25 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | WIRE MARK “Св-08Х21Н10М2Г4АФБ” FOR WELDING HIGH-STRENGTH STEEL |
| CN114959516A (en) * | 2022-05-25 | 2022-08-30 | 北京科技大学 | Stainless steel wire and preparation method thereof |
| CN115401362A (en) * | 2022-10-12 | 2022-11-29 | 中国原子能科学研究院 | Liquid lead-bismuth corrosion resistant super austenitic stainless steel welding wire and application thereof |
| CN115502610A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire steel wire containing vanadium and titanium for high-strength steel, welding wire for high-strength steel and production method of welding wire |
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Application publication date: 20130313 |