CN103769769B - A kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel - Google Patents
A kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel Download PDFInfo
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- CN103769769B CN103769769B CN201410009501.6A CN201410009501A CN103769769B CN 103769769 B CN103769769 B CN 103769769B CN 201410009501 A CN201410009501 A CN 201410009501A CN 103769769 B CN103769769 B CN 103769769B
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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
- B23K35/3033—Ni as the principal 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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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- Nonmetallic Welding Materials (AREA)
Abstract
Weld a low hydrogen type nickel-based welding electrode for LNG ship 9Ni steel, the coating comprising pure nickel core wire and wrap in core wire surface, the composition of core wire and content (wt%) thereof are: C≤0.02%, S≤0.01%, P≤0.01%, Ni >=99.0%, all the other constituent content≤0.50%, each composition total amount is 100%; In coating, each composition by weight percent of powder is: marble 25 ~ 35%, fluorite 10 ~ 21%, crome metal 12 ~ 28%, manganese metal 4 ~ 10%, molybdenum-iron 8 ~ 16%, ferrotungsten 1 ~ 6%, ferro-niobium 7 ~ 15%, organic matter 0 ~ 2%, soda ash 0 ~ 2%, and each composition total amount is 100%; By the powder of each composition proportionally with the waterglass Homogeneous phase mixing accounting for coating gross mass 25% ~ 35%, send in extrusion press and wrapped on core wire, after soft bake and high bake temperature.Welding usability of the present invention is good, can all-position welding, and its deposited metal has higher yield strength, higher tensile strength and low-temperature impact toughness energy preferably, still has higher cold impact value when-196 DEG C.
Description
Technical field
The present invention relates to the low hydrogen type nickel-based welding electrode that a kind of Nickel-welding Material, particularly one are suitable for welding LNG ship 9Ni steel (also known as 9%Ni steel).
Background technology
The W of International nickel Co. Ltd. Inco. Ltd. of 9Ni Gang Shi nineteen forty-four U.S. exploitation
(Ni)the medium alloy steel of-9%, it is a kind of low-carbon (LC) quenched and tempered steel.This steel have good toughness and high strength under extremely low temperature, and compare with aluminium alloy with austenitic stainless steel, have that coefficient of thermal expansion is little, the advantage of good economy performance, and serviceability temperature is minimum reaches-196 DEG C.The main feature of 9Ni steel is that high nickel content, high cleanliness, higher-strength, high low-temperature impact toughness, weldability are good, its chemical composition is: Ni:8.5 ~ 9.5%, C:0.0005 ~ 0.012%, Si:0.05 ~ 0.4%, Mn:0.30 ~ 0.80%, S≤0.005%, P≤0.008%, Mo:0.05 ~ 0.013%, V≤0.01%; Mechanical property: tensile strength Rm:680 ~ 820MPa, yield strength ReH >=570MPa, percentage elongation A >=20% ,-196 DEG C of KV >=100J.Since nineteen sixty research proves not carry out PWHT of stress relieving it can also use safely, 9Ni steel just becomes one of the main material for the manufacture of Large LNG ship.
LNG(Liquefied Natural gas, liquefied natural gas) ship refers to specialized ships LNG being transported to receiving station from liquefaction factory.Because LNG is the natural gas being cooled to-163 DEG C of liquid conditions, therefore LNG ship must hold it in-163 DEG C in transportation.Thus the material of operating environment requirements manufacture LNG ship has good low-temperature flexibility and in low temperature environment, has good intensity.
Along with the adjustment of China's energy strategy, LNG industry keeps the impetus of fast development in China always, the development of LNG industry greatly improves the demand of 9Ni steel and its welding material, but it is less to weld with 9Ni steel the welding material matched at present, and this significantly limit the development of China 9Ni steel solder technology.
Summary of the invention
The object of the invention is the blank filling up prior art, a kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel is provided, to reach and to weld 9Ni steel and match, and make its deposited metal at-196 DEG C, have the low-temperature impact toughness matched with mother metal, higher tensile strength and yield strength, thus the premium properties of mother metal itself when 9Ni steel is applied in LNG ship, can be given full play to, welding rod has good processing performance when welding simultaneously.
Technical scheme of the present invention is:
A kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel, comprise core wire and wrap the coating in core wire surface, described core wire is pure nickel core wire, core wire chemical composition and weight percent content thereof are: C≤0.02%, S≤0.01%, P≤0.01%, Ni >=99.0%, all the other constituent content≤0.50%, each composition total amount is 100%.
Further, in described coating, the composition of powder and weight percent content thereof are: marble 25 ~ 35%, fluorite 10 ~ 21%, crome metal 12 ~ 28%, manganese metal 4 ~ 10%, molybdenum-iron 8 ~ 16%, ferrotungsten 1 ~ 6%, ferro-niobium 7 ~ 15%, organic matter 0 ~ 2%, soda ash 0 ~ 2%, each composition total amount is 100%; By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing accounting for described coating gross mass 25% ~ 35% again, then send in extrusion press and conventionally wrapped on described core wire, after eventually passing soft bake and high bake temperature, namely become described welding rod.
Further, in described coating, the mass percentage content of the main component of each powder is as follows: CaCO in marble
3content>=96%, CaF in fluorite
2content>=96%, in ferro-niobium, Nb content is 50 ~ 65%, and in ferrotungsten, W content is 70 ~ 80%, Cr content>=99% in crome metal, Mn content>=99% in manganese metal, and in molybdenum-iron, Mo content is 55 ~ 65%.
Further, described waterglass is sodium silicate, KP1 or potassium-sodium water glass, and its Baume concentration is between 41 ° ~ 43 °.
Further, the temperature of described soft bake is 100 ~ 150 DEG C; The temperature of high bake temperature is 300 ~ 350 DEG C.
In coating raw material of the present invention, the Main Function of each composition is as follows:
Marble: belong to slag making, gas generating materials, marble can increase slag basicity, adds metallurgical desulfuration ability, reduces the infiltration of silicon, increase the ratio of this slag system gas shielded, be conducive to the improvement of the physico-chemical property of slag, be conducive to the protected effect of de-slag and slag.
Waterglass: waterglass is just as binding agent, due to containing Na, K element thus also have stabilising arc effect, but too much overrich can cause weldering speed slow, splash large, the viscosity of slag improves, affect mechanical performance, secondly the too high coating quick-drying of impelling of modulus is strengthened, and make electrode coating easily eccentric, used time coating intensity after hyperthermia drying also can reduce.
Organic matter: a small amount of organic matter can improve extrusion performance, but organic matter too much easily makes weld seam produce pore.
Soda ash: main lubricate, makes welding rod be easy to shape; Improve the stability of waterglass in addition, stop the carrying out of waterglass hydrolysis.
Each alloy: infiltrate alloy, supplements the scaling loss of alloying element in welding process; Supplement this alloying component in weld seam, improve weld seam solidified structure, improve mechanical property and the physical and chemical performance of weld seam.
Fluorite: fluorite effectively can remove H, can reduce the surface tension of liquid metal, improve the mobility of slag, but fluorite decomposition can produce pernicious gas hydrogen fluoride in welding process, causes the instability of electric arc, therefore strictly must control its consumption.
Weld compared with 9Ni steel welding rod with existing, the present invention has the following advantages:
1, there is the advantage that welding technological properties is good, can all-position welding be carried out;
2, formed weld seam there is good yield strength, tensile strength and impact flexibility, especially ?196 DEG C time still there is good comprehensive mechanical property; Deposited metal mechanical property of the present invention reaches: yield strength: 474MPa, tensile strength: 722MPa, percentage elongation 41% ， ?196 DEG C time impact value be 126J, meet the welding requirements of 9Ni steel LNG ship completely; Chemical composition and the percetage by weight of postwelding deposited metal of the present invention are: C :≤0.05%, Mn:2.0 ~ 4.0%, Si :≤0.5%, Cr:12.0 ~ 17.0%, Mo:5.0 ~ 9.0%, Nb:0.5 ~ 2.0%, W:1.0 ~ 2.0%, P :≤0.015%, S :≤0.015%, Ni: >=55%, meet completely the GB/T13814ENi6620 standard of Ni-based ultrafine powder welding rod and AWS A5.11ENiCrMo ?6 standards.
Detailed description of the invention
Elaborate to embodiments of the invention below, following examples give detailed embodiment and concrete operating process premised on technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
The invention provides a kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel, it coating comprising pure nickel core wire and wrap in this core wire surface.Described core wire uses pure nickel core wire, this is because pure nickel core wire source is wide, is easy to processing, low price; The composition of described core wire and weight percent content (wt%) thereof are: C≤0.02%, S≤0.01%, P≤0.01%, Ni >=99.0%, all the other constituent content≤0.50%, and each composition total amount is 100%.
In described coating, the composition of powder and weight percent content thereof are: marble 25 ~ 35%, fluorite 10 ~ 21%, crome metal 12 ~ 28%, manganese metal 4 ~ 10%, molybdenum-iron 8 ~ 16%, ferrotungsten 1 ~ 6%, ferro-niobium 7 ~ 15%, organic matter 0 ~ 2%, soda ash 0 ~ 2%, and each composition total amount is 100%; In described coating, the mass percentage content of the main component of each powder is as follows: CaCO in marble
3content>=96%, CaF in fluorite
2content>=96%, in ferro-niobium, Nb content is 50 ~ 65%, and in ferrotungsten, W content is 70 ~ 80%, Cr content>=99% in crome metal, Mn content>=99% in manganese metal, and in molybdenum-iron, Mo content is 55 ~ 65%.
By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing accounting for described coating gross mass 25% ~ 35% again, then send in extrusion press and conventionally wrapped on described core wire, after eventually passing soft bake and high bake temperature, namely become described welding rod; The temperature of described soft bake is 100 ~ 150 DEG C, and the temperature of high bake temperature is 300 ~ 350 DEG C; Described waterglass is sodium silicate, KP1 or potassium-sodium water glass, and its Baume concentration is between 41 ° ~ 43 °.
Be below three embodiments of powder Different Weight degree in the present invention.
In following 1#, 2# and 3# embodiment, electrode size is 3.2mm, and except the weight percent content difference of coating powder, all the other technical characteristics are all identical.
The composition proportion (% by weight) of the coating powder of table 1 three embodiment welding rod
The deposited metal composition (% by weight) of table 2 three embodiment welding rod
The deposited metal mechanical property of table 3 three embodiment welding rod
Claims (4)
1. one kind is welded the low hydrogen type nickel-based welding electrode of LNG ship 9Ni steel, comprise core wire and wrap the coating in core wire surface, described core wire is pure nickel core wire, core wire chemical composition and weight percent content thereof are: C≤0.02%, S≤0.01%, P≤0.01%, Ni >=99.0%, all the other constituent content≤0.50%, each composition total amount is 100%; It is characterized in that: in described coating, the composition of powder and weight percent content thereof are: marble 25 ~ 35%, fluorite 10 ~ 21%, crome metal 12 ~ 28%, manganese metal 4 ~ 10%, molybdenum-iron 8 ~ 16%, ferrotungsten 1 ~ 6%, ferro-niobium 7 ~ 15%, organic matter 0 ~ 2%, soda ash 0 ~ 2%, each composition total amount is 100%; By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing accounting for described coating gross mass 25% ~ 35% again, then send in extrusion press and conventionally wrapped on described core wire, after eventually passing soft bake and high bake temperature, namely become described welding rod.
2. the low hydrogen type nickel-based welding electrode of welding LNG ship 9Ni steel according to claim 1, is characterized in that: in described coating, the mass percentage content of the main component of each powder is as follows: CaCO in marble
3content>=96%, CaF in fluorite
2content>=96%, in ferro-niobium, Nb content is 50 ~ 65%, and in ferrotungsten, W content is 70 ~ 80%, Cr content>=99% in crome metal, Mn content>=99% in manganese metal, and in molybdenum-iron, Mo content is 55 ~ 65%.
3. the low hydrogen type nickel-based welding electrode of welding LNG ship 9Ni steel according to claim 1, is characterized in that: described waterglass is sodium silicate, KP1 or potassium-sodium water glass, its Baume concentration is between 41 ° ~ 43 °.
4. the low hydrogen type nickel-based welding electrode of welding LNG ship 9Ni steel according to claim 1, is characterized in that: the temperature of described soft bake is 100 ~ 150 DEG C; The temperature of high bake temperature is 300 ~ 350 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009501.6A CN103769769B (en) | 2014-01-09 | 2014-01-09 | A kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel |
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| CN201410009501.6A CN103769769B (en) | 2014-01-09 | 2014-01-09 | A kind of low hydrogen type nickel-based welding electrode welding LNG ship 9Ni steel |
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| CN103769769B true CN103769769B (en) | 2015-09-16 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978322B (en) * | 2014-05-19 | 2016-08-24 | 上海交通大学 | It is specifically designed to the efficient nickel-base welding rod of LNG ship ultralow temperature steel welding |
| CN104907730B (en) * | 2015-05-25 | 2017-04-26 | 上海交通大学 | LNG structure and novel slag-system nickel-based welding rod for welding marine 9 nickel steel |
| CN104907729B (en) * | 2015-05-25 | 2017-04-26 | 上海交通大学 | LNG structure and inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding marine 9 nickel steel |
| CN105108379B (en) * | 2015-09-30 | 2017-05-17 | 四川大西洋焊接材料股份有限公司 | Welding electrode compatible with Ni9 steel and capable of being used in cryogenic environment and preparation method thereof |
| CN110340566A (en) * | 2019-06-25 | 2019-10-18 | 钢铁研究总院 | A kind of nickel-base welding rod and its preparation method and application |
| CN111843278A (en) * | 2020-06-23 | 2020-10-30 | 磐固合金(常州)有限公司 | Nickel-based welding rod for argon arc backing welding and preparation method thereof |
| CN111590240B (en) * | 2020-06-28 | 2022-02-01 | 昆山京群焊材科技有限公司 | 9% Ni steel matched nickel-based welding rod special for overhead welding |
| CN113414519B (en) * | 2021-08-06 | 2022-11-29 | 四川大西洋焊接材料股份有限公司 | ENi6620 nickel-based welding rod for alternating current and preparation method and welding method thereof |
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| JPS5171846A (en) * | 1974-12-20 | 1976-06-22 | Nippon Steel Corp | GOKUTEIONKOYOHIFUKUAAKUYOSETSUBO |
| JPS61186197A (en) * | 1985-02-13 | 1986-08-19 | Nippon Steel Corp | Ni-base coated electrode |
| JP4447078B2 (en) * | 1998-08-10 | 2010-04-07 | 株式会社神戸製鋼所 | Ni-based alloy flux cored wire |
| FR2845098B1 (en) * | 2002-09-26 | 2004-12-24 | Framatome Anp | NICKEL-BASED ALLOY FOR ELECTRIC WELDING OF NICKEL ALLOYS AND WELDED STEEL STEELS AND USE THEREOF |
| CN101745759B (en) * | 2009-12-21 | 2011-11-30 | 中国船舶重工集团公司第七二五研究所 | Nickel-base welding rod |
| KR20130088185A (en) * | 2010-12-22 | 2013-08-07 | 가부시키가이샤 고베 세이코쇼 | Welding solid wire and welding metal |
| CN102500951B (en) * | 2011-10-20 | 2013-09-18 | 四川大西洋焊接材料股份有限公司 | Nickel-based welding electrode matched with 9Ni steel |
| CN102430876B (en) * | 2011-10-20 | 2013-06-05 | 四川大西洋焊接材料股份有限公司 | Nickel-based welding electrode for welding nickel-chromium-molybdenum alloy |
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