CN104907730A - LNG structure and novel slag-system nickel-based welding rod for welding marine 9 nickel steel - Google Patents

LNG structure and novel slag-system nickel-based welding rod for welding marine 9 nickel steel Download PDF

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Publication number
CN104907730A
CN104907730A CN201510270814.1A CN201510270814A CN104907730A CN 104907730 A CN104907730 A CN 104907730A CN 201510270814 A CN201510270814 A CN 201510270814A CN 104907730 A CN104907730 A CN 104907730A
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content
welding
nickel
welding rod
novel slag
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CN104907730B (en
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何国
王皇
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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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
    • B23K35/3601—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 with inorganic compounds as principal constituents
    • 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
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

Provided are an LNG structure and a novel slag-system nickel-based welding rod for welding marine 9 nickel steel. The novel slag-system nickel-based welding rod for welding the marine 9 nickel steel comprises a welding core and a coating arranged on the surface of the welding core in a wrapping mode, the content of chemical components and weight percentage of the welding core comprises 0.02% or less of C, 0.01% or less of S, 0.01% or less of P, 99.0% or more of Ni, 0.50% or less of remaining elements, and the total amount of all the components is 100%; the content of components and the weight percentage of power materials in the coating comprises 5-15% of marble, 14-23% of cryolite, 5-10% of rutile, 5-10% of barium carbonate, 22-28% of chromium metal, 4-7% of manganese metal, 5-8% of molybdenum, 3-8% of ferromolybdenum, 2-4% of ferrotungsten, 3-7% of ferroniobium, 0.5-1.5% of organic matter, 0.5-1.5% of potassium titanate, 1-3% of silicon iron, 1-4% of ferrotitanium, and the total amount of all the components is 100%; the power materials of all the components are evenly mixed with water glass which accounts for 16%-35% of the total mass of the coating according to proportion, the mixture is conveyed to a press coating machine and arranged on the welding core in the wrapping mode, and the inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding the marine 9 nickel steel are obtained through low-temperature baking and high-temperature baking. According to the LNG structure and the inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding the marine 9 nickel steel, the comprehensive mechanical property can be achieved at the temperature of -196 DEG C, the welding technological property is achieved simultaneously, and all-position welding can be conducted.

Description

LNG structure and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel
Technical field
The present invention relates to a kind of Nickel-welding Material, particularly one and be applicable to the novel slag system ENiCrFe-9 nickel-base welding rod that LNG structure and 9 nickel steels peculiar to vessel (also known as 9%Ni steel) weld.
Background technology
Along with the quickening of global industry, IT application process, countries in the world are to energy demand sharp increase, and the problem such as energy shortage, pollution that caused by coal burning that simultaneously seriously govern sustainable economic development also day by day exposes.Natural gas, as high-quality clean fuel and important chemical raw material, has become one of large pillar energy in the world today three.Over nearly 10 years, the importance and functions of natural gas in social development becomes increasingly conspicuous, whole world natural gas Production and consumption is all steady-state growth situation, and expect the year two thousand twenty whole world natural gas volume of trade 40% will be liquefied natural gas LNG (Liquefied Natural gas).The development of LNG has driven the development of LNG industry, and LNG industry comprises production, transport, storage, receives and application double teacher.In LNG transport, LNG ship is the pith of whole transit link.Because natural gas is cooled to-163 DEG C by LNG, namely LNG ship is the specialized ships of transport liquefied gases under-162 DEG C of low temperature, be a kind of " marine super van cooler ", namely the material of operating environment requirements manufacture LNG ship has good low-temperature flexibility and in low temperature environment, has good intensity.
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, serviceability temperature is minimum reaches-196 DEG C, and to compare with aluminium alloy with austenitic stainless steel and have that coefficient of thermal expansion is little, the advantage of good economy performance, proved not carry out since PWHT of stress relieving also can use safely from nineteen sixty research, 9Ni steel just becomes one of the main material for the manufacture of Large LNG storage tank.The main feature of 9Ni steel is that high nickel content, high cleanliness, higher-strength, high low-temperature impact toughness, weldability are good, and 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%.The mechanical property of 9Ni steel is: tensile strength Rm:680 ~ 820MPa, yield strength ReH >=570MPa, percentage elongation A >=20% ,-196 DEG C of KV >=100J.
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 to 9Ni steel and 9Ni steel welding material, but the welding rod of 9Ni steel welding at present also can not meet the development of 9Ni steel solder technology far away to kind and performance.
Summary of the invention
The object of the invention is to, a kind of LNG structure and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel are provided, match with LNG structure and 9Ni steel peculiar to vessel welding requirements, to reach the effect making deposited metal have the low-temperature impact toughness matched with mother metal, higher tensile strength and yield strength at-196 DEG C, can give full play to the premium properties of mother metal itself when 9Ni steel is applied in LNG ship, welding rod has good processing performance when welding simultaneously.
Technical scheme of the present invention is:
A kind of LNG structure and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel, comprise core wire and wrap the coating in core wire surface, the chemical composition of this core wire 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%.
As further improvement, in described coating, the composition of powder and weight percent content thereof are: marble 5 ~ 15%, ice crystal 14 ~ 23%, rutile 5 ~ 10%, brium carbonate 5 ~ 10%, crome metal 22 ~ 28%, manganese metal 4 ~ 7%, molybdenum 5 ~ 8%, molybdenum-iron 3 ~ 8%, ferrotungsten 2 ~ 4%, ferro-niobium 3 ~ 7%, organic matter 0.5 ~ 1.5%, potassium titanate 0.5 ~ 1.5%, ferrosilicon 1 ~ 3%, ferrotianium 1 ~ 4%, and each composition total amount is 100%; By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing of the quality 16% ~ 35% accounting for powder in described coating 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 novel slag system nickel-based welding electrode.
As further improvement, in described coating, the mass percentage content of the main component of each powder is as follows: CaCO in marble 3content>=96%; F content>=53% in ice crystal, Na content≤31%, Al content>=13%; In ferro-niobium, Nb content is 50 ~ 65%; In ferrotungsten, W content is 70 ~ 80%; Cr content>=99% in crome metal, Mn content>=99% in manganese metal; Mo content>=99% in metal molybdenum; In molybdenum-iron, Mo content is 55 ~ 65%, and in ferrotianium, Ti content is 25 ~ 35%; In ferrosilicon, Si content is 40 ~ 45%; BaCO in brium carbonate 3content>=98%; TiO in potassium titanate 2content>=70%, K 2o content is 17 ~ 21%.
As further improvement, described waterglass is sodium silicate, KP1 or potassium-sodium water glass, and its Baume concentration is between 41 ° ~ 43 °.
As further improvement, 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.
KP1: as long as waterglass is as binding agent, due to containing K 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.
Potassium titanate: main lubricate, makes welding rod be easy to shape; Improve the stability of waterglass in addition, stop the carrying out of waterglass hydrolysis.
Alloy: infiltrate various alloy, supplements the scaling loss of alloying element in welding process, supplements this alloying component in weld seam, improves weld seam solidified structure, improves the mechanical property of weld seam.
Ice crystal: ice crystal effectively can remove H, can reduce the surface tension of liquid metal, improves the mobility of slag; But ice crystal decomposition can produce pernicious gas hydrogen fluoride in welding process, too much ice crystal can cause the instability of electric arc, therefore strictly must control its consumption.
Ferrotianium: can effectively deoxidation, the TiO that its Ti and oxygen generate 2also help de-slag.
Ferrosilicon: can effectively deoxidation, but the content of ferrosilicon must be controlled otherwise easily cause deposited metal siliconising serious.
Brium carbonate: gas making slag making, increases the activity of slag, slag uniform fold can be made at face of weld; The brium carbonate of equal in quality compares with calcium carbonate, the generation carbon dioxide that brium carbonate can be less; But because barium is heavy metal, so must the strict content controlling brium carbonate.
Rutile: slag making, slag can be enable to cover the surface of weld seam uniformly, and appropriate rutile is conducive to de-slag.
Compared with existing nickel-based welding electrode, the present invention has the following advantages:
There is excellent welding technological properties, can all-position welding be carried out; There is good yield strength, tensile strength and impact flexibility, especially-196 DEG C time, still there is good comprehensive mechanical property.
The deposited metal mechanical property of novel slag system nickel-base welding rod of the present invention reaches: yield strength: 457MPa, tensile strength: 707MPa, percentage elongation 44%, and when-196 DEG C, impact value is 78J, meets the welding requirements of 9Ni steel LNG ship storage tank completely; Component and the percentage by weight of postwelding formation deposited metal of the present invention are: C :≤0.05%, Mn:1.2 ~ 4.0%, Si :≤0.5%, Cr:12.0 ~ 16.0%, Mo:2.0 ~ 4.0%, Nb:0.5 ~ 2.0%, W :≤1.2%, P :≤0.015%, S :≤0.015%, Ni: >=60%, meet GB/T 13814ENi6620 standard and the AWS A5.11ENiCrFe-9 standard of Ni-based ultrafine powder welding rod completely.
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 LNG structure and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel, it comprises core wire and wraps the coating 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 chemical composition of described core wire 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%, and each composition total amount is 100%.
In described coating, the composition of powder and weight percent content thereof are: marble 5 ~ 15%, ice crystal 14 ~ 23%, rutile 5 ~ 10%, brium carbonate 5 ~ 10%, crome metal 22 ~ 28%, manganese metal 4 ~ 7%, molybdenum 5 ~ 8%, molybdenum-iron 3 ~ 8%, ferrotungsten 2 ~ 4%, ferro-niobium 3 ~ 7%, organic matter 0.5 ~ 1.5%, potassium titanate 0.5 ~ 1.5%, ferrosilicon 1 ~ 3%, ferrotianium 1 ~ 4%, each composition total amount is 100%.
In described coating, the mass percentage content of the main component of each powder reaches following requirement: CaCO in marble 3content>=96%; F content>=53% in ice crystal, Na content≤31%, Al content>=13%; In ferro-niobium, Nb content is 50 ~ 65%; In ferrotungsten, W content is 70 ~ 80%; Cr content>=99% in crome metal, Mn content>=99% in manganese metal; Mo content>=99% in metal molybdenum; In molybdenum-iron, Mo content is 55 ~ 65%, and in ferrotianium, Ti content is 25 ~ 35%; In ferrosilicon, Si content is 40 ~ 45%; BaCO in brium carbonate 3content>=98%; TiO in potassium titanate 2content>=70%, K 2o content is 17 ~ 21%.
By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing of the quality 16% ~ 35% accounting for powder in described coating 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 novel slag system nickel-based welding electrode; Described waterglass is sodium silicate, KP1 or potassium-sodium water glass, and its Baume concentration is between 41 ° ~ 43 °; The temperature of described soft bake is 100 ~ 150 DEG C; The temperature of high bake temperature is 300 ~ 350 DEG C.
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 table 1 three embodiment electrode coating powder
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
Sequence number Yield strength (MPa) Tensile strength (MPa) Percentage elongation (%) Impact value (J -196℃)
1# 461 712 47 84
2# 454 704 43 75
3# 456 705 42 75
Mean value 457 707 44 78

Claims (5)

1. a LNG structure and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel, comprise core wire and wrap the coating in core wire surface, it is characterized in that: the chemical composition of described core wire 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%.
2. LNG structure according to claim 1 and the novel slag system nickel-base welding rod of 9 nickel steel welding peculiar to vessel, it is characterized in that: in described coating, the composition of powder and weight percent content thereof are: marble 5 ~ 15%, ice crystal 14 ~ 23%, rutile 5 ~ 10%, brium carbonate 5 ~ 10%, crome metal 22 ~ 28%, manganese metal 4 ~ 7%, molybdenum 5 ~ 8%, molybdenum-iron 3 ~ 8%, ferrotungsten 2 ~ 4%, ferro-niobium 3 ~ 7%, organic matter 0.5 ~ 1.5%, potassium titanate 0.5 ~ 1.5%, ferrosilicon 1 ~ 3%, ferrotianium 1 ~ 4%, and each composition total amount is 100%; By the powder of each composition proportionally Homogeneous phase mixing, add the waterglass Homogeneous phase mixing of the quality 16% ~ 35% accounting for powder in described coating 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 novel slag system nickel-based welding electrode.
3. LNG structure according to claim 2 and 9 nickel steel welding peculiar to vessel are with novel slag system nickel-base welding rod, it 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%; F content>=53% in ice crystal, Na content≤31%, Al content>=13%; In ferro-niobium, Nb content is 50 ~ 65%; In ferrotungsten, W content is 70 ~ 80%; Cr content>=99% in crome metal, Mn content>=99% in manganese metal; Mo content>=99% in metal molybdenum; In molybdenum-iron, Mo content is 55 ~ 65%, and in ferrotianium, Ti content is 25 ~ 35%; In ferrosilicon, Si content is 40 ~ 45%; BaCO in brium carbonate 3content>=98%; TiO in potassium titanate 2content>=70%, K 2o content is 17 ~ 21%.
4. LNG structure according to claim 2 and 9 nickel steel welding peculiar to vessel are with novel slag system nickel-base welding rod, and it is characterized in that: described waterglass is sodium silicate, KP1 or potassium-sodium water glass, its Baume concentration is between 41 ° ~ 43 °.
5. LNG structure according to claim 2 and 9 nickel steel welding peculiar to vessel are with novel slag system nickel-base welding rod, it 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.
CN201510270814.1A 2015-05-25 2015-05-25 LNG structure and novel slag-system nickel-based welding rod for welding marine 9 nickel steel Expired - Fee Related CN104907730B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106514051A (en) * 2016-12-08 2017-03-22 河海大学常州校区 Underwater welding rod and manufacturing method thereof
CN106583965A (en) * 2016-12-15 2017-04-26 昆山京群焊材科技有限公司 High-strength and high-toughness flux-cored wire with low tempering parameter and used for 2.25Cr-1Mo steel
CN107214434A (en) * 2017-04-21 2017-09-29 洛阳双瑞特种合金材料有限公司 LNG structures and the nickel-base welding rod of 9Ni steel peculiar to vessel welding and preparation method thereof
CN109454357A (en) * 2018-11-28 2019-03-12 东莞理工学院 A kind of nickel-base welding rod and preparation method thereof
CN112475661A (en) * 2021-02-04 2021-03-12 四川西冶新材料股份有限公司 Nickel-chromium-iron coating and welding rod for welding nickel-based alloy and preparation method thereof
CN113414519A (en) * 2021-08-06 2021-09-21 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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CN103769769A (en) * 2014-01-09 2014-05-07 上海交通大学 9Ni steel low hydrogen type nickel-based welding electrode for welding LNG ship
CN103978322A (en) * 2014-05-19 2014-08-13 上海交通大学 Efficient nickel base welding rod special for ultralow temperature steel welding of LNG (liquefied natural gas) ship

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GB1481831A (en) * 1973-08-08 1977-08-03 Inco Europ Ltd Welding electrode
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CN102500951A (en) * 2011-10-20 2012-06-20 四川大西洋焊接材料股份有限公司 Nickel-based welding electrode matched with 9Ni steel
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106514051A (en) * 2016-12-08 2017-03-22 河海大学常州校区 Underwater welding rod and manufacturing method thereof
CN106583965A (en) * 2016-12-15 2017-04-26 昆山京群焊材科技有限公司 High-strength and high-toughness flux-cored wire with low tempering parameter and used for 2.25Cr-1Mo steel
CN107214434A (en) * 2017-04-21 2017-09-29 洛阳双瑞特种合金材料有限公司 LNG structures and the nickel-base welding rod of 9Ni steel peculiar to vessel welding and preparation method thereof
CN107214434B (en) * 2017-04-21 2019-10-29 洛阳双瑞特种合金材料有限公司 LNG structure and the nickel-base welding rod and preparation method thereof of 9Ni steel peculiar to vessel welding
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CN112475661A (en) * 2021-02-04 2021-03-12 四川西冶新材料股份有限公司 Nickel-chromium-iron coating and welding rod for welding nickel-based alloy and preparation method thereof
CN113414519A (en) * 2021-08-06 2021-09-21 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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