CN105081613B - A kind of ultralow temperature steel nickel-base welding rod and preparation method thereof - Google Patents
A kind of ultralow temperature steel nickel-base welding rod and preparation method thereof Download PDFInfo
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- CN105081613B CN105081613B CN201510638937.6A CN201510638937A CN105081613B CN 105081613 B CN105081613 B CN 105081613B CN 201510638937 A CN201510638937 A CN 201510638937A CN 105081613 B CN105081613 B CN 105081613B
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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
- B23K35/3033—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
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
The invention belongs to technical field of welding materials, specially a kind of ultralow temperature steel nickel-base welding rod and preparation method thereof.Welding rod includes core wire, medicinal powder and binding agent, wherein, medicinal powder is 25 27 with welding rod quality ratio：100, medicinal powder is 100 with binding agent mass ratio：25‑30.The arc stability when welding rod prepared using the present invention is welded, splashes smaller, and de- slag is good, beautiful appearance, AC/DC, all positon good operation performance.It is mainly used in the Nickel-based Alloy Welding for having heat-resisting, anti-corrosion requirement, it can also be used to some difficult solder alloys, different steel weld.
Description
Technical field
The invention belongs to field of welding material, specially a kind of ultralow temperature steel nickel-base welding rod and preparation method thereof.
Background technology
Along with the extensive utilization of domestic and international 9Ni steel, and LNG storage tank engineering swift and violent increase, the welding of ultralow temperature steel
The demand of material also increases rapidly, causes LNG extremely low temperature tanks construction costs to improve constantly.It is thereby achieved that LNG ultralow temperature is stored up
The production domesticization of tank material has great, far-reaching strategic importance in tank.And ultralow temperature concept is not unified worldwide
Standard, but at present generally by the productions such as various liquefied petroleum gas, liquid nitrogen, liquid oxygen, storage container and conveyance conduit and in cold
The equipment that area is on active service is referred to as low-temperature equipment, manufactures the steel referred to as low-temperature steel of these equipments.And when design temperature in use less than-
After 70 DEG C, external low temperature Steel material must be just selected.In these materials, especially nickel content is 9% steel (U.S. ASTM marks
Standard is SA353, hereinafter referred to as 9Ni steel) temperature in use it is minimum, less than -196 DEG C can be less than.But, current China does not have also
This ultralow temperature steel is put goods on the market with welding material, and also no pertinent literature carries out research description to this kind of welding material, external
Also multiplex ENiCrMo-4 or ENiCrMo-6 welding rods are used in the storage tank equipment under ultra-low temperature surroundings.
The content of the invention
The purpose of the present invention is directed to above technical problem, there is provided a kind of to meet the super of AWS A5.11ENiCrFe-9 requirements
Low-temperature steel nickel-base welding rod, the 9Ni steel welded using the welding rod and LNG storage tank still have good manufacturability under ultralow temperature
Energy and mechanical performance, it can also be used to some difficult solder alloys, the welding of dissimilar steel.
Another object of the present invention is to provide a kind of preparation of the ultralow temperature steel nickel-base welding rod with above performance
Method.
To achieve these goals, concrete technical scheme of the invention is：
A kind of ultralow temperature steel nickel-base welding rod, the welding rod includes core wire, medicinal powder and binding agent, wherein, medicinal powder and welding rod matter
Amount is than being 25-27：100, medicinal powder is 100 with binding agent mass ratio：25-30.
Core wire Ingredient percent is to be accounted in terms of the mass percent of welding rod by medicinal powder, each raw material and quality percentage in medicinal powder
Than as follows：
Marble 7-10%, sodium fluoride 0.4-0.55%, soda ash 0.3-0.4%, ferro-niobium 0.5-0.7%, molybdenum-iron 1.3-
1.5%th, rutile 2.5-2.8%, quartz 2.0-3.5%, fluorite 6-8%, crome metal 1.2-1.4%, CMC 0.4-0.7%,
Potassium carbonate 0.8-1.8%.Binding agent is 3 for the mass ratio of the potassium silicate of 41-43Be ' and sodium metasilicate under the conditions of 20 DEG C:1 water glass
Glass, modulus is 3.1M.
Preferably, being accounted in terms of the mass percent of welding rod by medicinal powder, component raw material and mass percent are as follows in medicinal powder：
Marble 7.5%, sodium fluoride 0.47%, soda ash 0.33%, ferro-niobium 0.6%, molybdenum-iron 1.4%, rutile 2.65%,
Quartz 2.8%, fluorite 7%, crome metal 1.3%, CMC0.5%, potassium carbonate 1.4%.
A kind of preparation method of ultralow temperature steel nickel-base welding rod, comprises the following steps：
Step one, the powder of each composition of coating is mixed in proportion；
Step 2, the binding agent of the total composition quality 25-30% of addition medicinal powder are uniformly mixed and (carry out not less than 30min
Stirring), feeding welding rod apply press in is wrapped on core wire by the pressure of 14-16MPa；
Step 3, again through 80-90 DEG C of low temperature bakee 1.5-2 hour, 300 DEG C of high temperature bakee baking baking in 1-2 hour, i.e.,
Into.
The welding rod prepared using the present invention, the tensile strength >=650Mpa of its normal temperature deposited metal, yield strength >=
400Mpa, elongation percentage >=25%, -196 DEG C of impacts reach 47J.
The Main Function of each composition is as follows in medicinal powder of the present invention：
Marble：Marble is used in welding rod, CaO and CO is resolved into the presence of arc heat2Be welding rod manufacture in and
Conventional builds slag gas generating materials, improves slag basicity, improves deposited metal degree of purity, reduces field trash amount, stabilization electric arc increase
Slag and metal interface tension force and surface tension, improve de- slag.
Fluorite：The fusing point and viscosity of slag are adjusted, increases the mobility of molten slag, the physical property butt welding for improving slag is seamed into
Type, de- slag etc. play a crucial role, and are also the main material for reducing diffusible hydrogen in weld seam, but because of the presence of fluorine, can cause electric arc not
Stabilization, and produce toxic gas, it should rationally control ratio.
Quartz：Main Function is slag making, it is possible to decrease slag basicity, and to weld seam siliconising, thus arc voltage can be improved, carefully
Change molten drop.
Rutile：Slag making, stabilising arc, adjust fusing point, viscosity, surface tension and the mobility of slag, improve appearance of weld, subtract
It is few to splash.
Molybdenum-iron：Molybdenum can significantly improve the intensity of weld metal, there is crystal grain thinning, and appropriate molybdenum-iron addition can be carried
The intensity of weld seam high, hardness and heat endurance；But it is too high, weld metal toughness can be influenceed.
Ferro-niobium：Adding ferro-niobium can improve strength plastic and corrosion resistance, but niobium easily produces Nb4Si with silicon, is a kind of eutectic
Point compound, therefore answer the content of suitable control silicon.
Potassium carbonate：It is main to play stabilising arc, and but often make coating moisture absorption yellowing, admittedly need reasonable employment.
Soda ash, CMC：It is to improve the extrusion performance of welding rod to add soda ash and CMC.
In medicinal powder component add marble, fluoride, quartz, rutile, and the various components of rational proportion ratio, protect
Card welding rod obtains good mechanical property and welding technological properties, add crome metal, ferro-niobium, molybdenum-iron, etc. component obtain welding rod
Suitable deposited metal composition, obtains good mechanical property, adds soda ash, CMC to ensure the production technology performance of welding rod,
Improve the extrusion performance of welding rod.By butt welding core component and marble, fluoride, quartz, rutile, crome metal, ferro-niobium, molybdenum-iron
Ensure that welding rod obtains good processing performance and mechanical property etc. the ratio of component, obtain the deposited metal of high purity.
The present invention is assembled and coordinated so as to realize its goal of the invention with carbon steel core wire by the organic of above-mentioned medicinal powder composition.
Core wire can be commercially.
And the welding rod of this patent research is chromium nickel heat-resisting alloy welding rod.Weld seam has excellent plasticity, toughness and cracking resistance
Performance.Weld metal is respectively provided with intensity and very strong anti-corrosion capability higher under room temperature and ultralow temperature, also it is solderable be connected to it is heat-resisting,
The nickel-base alloy of anti-corrosion requirement, it can also be used to some difficult solder alloys, the welding and built-up welding of dissimilar steel.My company and the smelting steel of Wuhan one
The limited configurations responsible company joint research and development welding rod, solves such welding rod and relies primarily on import, and import price cycle high
The deficiency such as long, meets the market demand.
The positive effect of the present invention is：
(1) weld integrity energy, is effectively improved, and welding technological properties is well, arc stability, small, weldering of splashing
Seam beautiful appearance, takes off slag good, it is possible to achieve the features such as all-position welding.Preparation method is simple, easy to operate；
(2), the welding rod can alternating current-direct current use, especially exchange zero load low pressure 60V and can guarantee that electric arc is smooth, it is ensured that respectively
Plant the applicability under use condition.Flowed because the deposited metal fusing point of nickel-base welding rod is relatively low, heat conductivility is poor, under molten condition
Property difference etc., causes this research welding rod to there are problems that the spreadability of liquid metal and slag is poor, appearance of weld.In order to ensure weldering
Seam metal fluidity is good, beautiful appearance, it is therefore desirable to adds the material of a large amount of shoddyes, shoddye material such as fluorite etc. and can influence electricity
Arc arc-stabilising, therefore need to add a large amount of stabilising arcs and with the material of shoddye effect, such as sodium fluoride, potassium carbonate, both ensure that into
Type it is attractive in appearance, in turn ensure that the stability of electric arc.
(3), welding rod of the invention welding under communication environment, can both reduce arc blow, and can be because required heat input
It is smaller than direct current, so that it is guaranteed that obtaining more preferable mechanical performance.And welding rod of the invention containing Fe it is high, it is low containing Mo, Nb, by W,
The invigoration effect of Cr ensures its mechanical performance under ultra-low temperature surroundings, compared with external accustomed to using ENiCrMo-3 and
For ENiCrMo-6, the welding rod of the invention is of relatively low cost.
Specific embodiment
Below in conjunction with instantiation, explanation is explained in detail to the present invention, but it is above-mentioned this should not to be interpreted as into the present invention
Subject area is only limitted to following embodiments.
Raw material and core wire come from market purchase and obtain in following examples；Ultralow temperature steel is welded, at normal temperatures
Detect the performance of deposited metal.
Embodiment 1
Get it filled powder, accounted in terms of the mass percent of welding rod by medicinal powder, medicinal powder each component and its mass fraction are as follows：
Marble 8%, sodium fluoride 0.5%, soda ash 0.33%, ferro-niobium 0.6%, molybdenum-iron 1.4%, rutile 2.8%, quartz
2.2%th, fluorite 7%, crome metal 1.3%, CMC0.5%, potassium carbonate 1.4%.
Core wire quality 69.64% is taken, composition meets following requirement (wt%)：Core wire Ingredient percent is C 0.07-
0.10%, Mn 1.0-1.5, Si≤0.10, S:≤ 0.004, P≤0.005Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10,
Fe 4.0-5.0, Nb2.0-2.5, W0.8-1.2, balance of nickel and trace impurity, the gross weight of each composition is in above core wire
100%.
Preparation method is：Above-mentioned medicinal powder each component is well mixed, addition accounts for 20 DEG C of bars of medicinal powder gross mass content 25%
The potassium silicate of 41-43Be ' and the mass ratio of sodium metasilicate are 3 under part:1 waterglass, modulus is 3.1M, carries out the stirring of 50min.
It is wrapped on core wire in hydraulic type welding rod production equipment with common process.Again through 80-90 DEG C of low temperature bakee 1.5-2 hours,
300 DEG C of high temperature bakees baking in 1-2 hour,
Embodiment 2
Get it filled powder, accounted in terms of the mass percent of welding rod by medicinal powder, medicinal powder each component and its mass fraction are as follows：
Marble 9%, sodium fluoride 0.4%, soda ash 0.33%, ferro-niobium 0.6%, molybdenum-iron 1.5%, rutile 2.7%, quartz
2%th, fluorite 7%, crome metal 1.2%, CMC0.5%, potassium carbonate 1.4%.
Binding agent accounts for medicinal powder gross mass content 28%.
Core wire accounts for the 73.42% of total welding rod.
Again through 80-90 DEG C of low temperature bakee 1.5-2 hour, 300 DEG C of high temperature bakee baking baking in 1-2 hour,
Other operating procedures such as embodiment 1.
Embodiment 3：
A kind of special ultralow temperature steel nickel-base welding rod of the invention, need to strictly control the impurity element of deposited metal to contain
Amount, the welding rod is produced using the rod silk for meeting following component requirements, ensures that deposited metal obtains good power using basic slag system
Learn performance.
Get it filled powder, medicinal powder each component and its mass fraction are as follows：Marble 7.5%, sodium fluoride 0.47%, soda ash
0.33%th, ferro-niobium 0.6%, molybdenum-iron 1.4%, rutile 2.65%, quartz 2.8%, fluorite 7%, crome metal 1.3%,
CMC0.5%, potassium carbonate 1.4%.
Core wire quality 372.1g is taken, composition meets following requirement (wt%)：Core wire Ingredient percent is C 0.07-
0.10%, Mn 1.0-1.5, Si≤0.10, S:≤ 0.004, P≤0.005Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10,
Fe 4.0-5.0, Nb2.0-2.5, W0.8-1.2, balance of nickel and trace impurity, the gross weight of each composition is in above core wire
100%.
Above-mentioned medicinal powder each component is well mixed, the potassium silicate that addition is accounted under the conditions of 20 DEG C of medicinal powder gross mass content 29%
It is 3 with sodium metasilicate mass ratio:1 waterglass, Baume concentration is the stirring of 41-43 ' Be, 40min.With common process in hydraulic type
It is wrapped on core wire in welding rod production equipment.Through baking 1.5-2 hours of 80-90 DEG C of low temperature, high temperature, 300 DEG C of baking 1-2 are small again
When bakee bakee,.
Welding rod in embodiment 3 is carried out into deposited metal mechanical property test its result of the test as follows：
The deposited metal composition of 1 embodiment of table 3
Deposited metal mechanical property in the embodiment 3 of table 2
Welding rod in embodiment 3 is used for 9Ni steel plate butt welding, downhand position buttcover plate mechanical property test result is such as
Under：
Table 3 uses 9Ni steel buttcover plates mechanical property (downhand welding) of welding rod in embodiment 3
Welding rod in embodiment 3 is used for 9Ni steel plate butt welding, horizontal position buttcover plate mechanical property test result is such as
Under：
Table 4 uses 9Ni steel buttcover plates mechanical property (horizontal position welding) of welding rod in embodiment 3
As known from the above, the welding rod for being prepared in embodiment 1-3, learns that the processing property of electrode is good after experiment：
Alternating current-direct current welding electric arc is stablized, smaller, the de- slag that splashes is good, beautiful appearance, all positon good operation performance.Vertical horizontal and horizontal position welding
In, for 9Ni steel butt welding, welding joint mechanical property is good, and intensity and low-temperature flexibility realize good with mother metal
Match somebody with somebody.Its performance meets AWS A5.11ENiCrFe-9 relevant criterion technical requirements.
Claims (7)
1. a kind of ultralow temperature steel nickel-base welding rod, it is characterised in that the welding rod includes core wire, medicinal powder and binding agent, wherein, medicinal powder
It is 25-27 with welding rod quality ratio：100, medicinal powder is 100 with binding agent mass ratio：25-30；Wherein, the quality of welding rod is accounted for medicinal powder
Percentages, the raw material and mass percent contained in medicinal powder is as follows：
Marble 7-10%, sodium fluoride 0.4-0.55%, soda ash 0.3-0.4%, ferro-niobium 0.5-0.7%, molybdenum-iron 1.3-1.5%, rutile
2.5-2.8%, quartz 2.0-3.5%, fluorite 6-8%, crome metal 1.2-1.4%, CMC 0.4-0.7%, potassium carbonate 0.8-1.8%；Institute
The core wire composition stated is by percentage to the quality：C 0.07-0.10, Mn 1.0-1.5, Si≤0.10, S≤0.004, P≤
0.005, Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10, Fe 4.0-5.0, Nb2.0-2.5, W0.8-1.2, balance of nickel
With trace impurity, the gross mass of each composition is 100% in above core wire.
2. a kind of ultralow temperature steel nickel-base welding rod according to claim 1, it is characterised in that：Accounted for medicinal powder
The mass percent meter of welding rod, component raw material and mass percent are as follows in medicinal powder：
Marble 7.5%, sodium fluoride 0.47%, soda ash 0.33%, ferro-niobium 0.6%, molybdenum-iron 1.4%, rutile 2.65%, quartz 2.8%,
Fluorite 7%, crome metal 1.3%, CMC0.5%, potassium carbonate 1.4%.
3. a kind of ultralow temperature steel nickel-base welding rod according to claim 1, it is characterised in that：Described binding agent is 20 DEG C
Under the conditions of 41-43Be ', potassium silicate and sodium metasilicate mass ratio be 3:1 waterglass, modulus is 3.1M.
4. a kind of ultralow temperature steel nickel-base welding rod according to claim 1, it is characterised in that：Its normal temperature deposited metal it is anti-
Tensile strength >=650Mpa, yield strength >=400Mpa, elongation percentage >=25%, -196 DEG C of impacts reach 47J.
5. a kind of preparation method of the ultralow temperature steel nickel-base welding rod according to any one of claim 1-4, its feature exists
Comprised the following steps in the preparation method：
Step one, the powder of each composition of coating is mixed in proportion；
Step 2, the binding agent of the total composition quality 25-30% of addition medicinal powder are uniformly mixed, and feeding welding rod is applied in press presses 14-
The pressure of 16MPa is wrapped on core wire；
Step 3, again through 80-90 DEG C of low temperature bakee 1.5-2 hour, 300 DEG C of high temperature bakee baking baking in 1-2 hour,.
6. the preparation method of a kind of ultralow temperature steel nickel-base welding rod according to claim 5, it is characterised in that：Step 3 is
Bakee 1.5 hours and bakee through the baking 2 hours of 88 DEG C of low temperature, 300 DEG C of high temperature again,.
7. the preparation method of a kind of ultralow temperature steel nickel-base welding rod according to claim 5, it is characterised in that：Described is viscous
Knot agent is uniformly mixed, its mixing time >=30min.
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| CN105710559A (en) * | 2016-04-19 | 2016-06-29 | 南通豪泰焊材有限公司 | Nickel-based alloy welding rod and manufacturing method thereof |
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| CN114211153A (en) * | 2021-12-02 | 2022-03-22 | 钢铁研究总院 | LNG ultralow-temperature steel welding method based on nickel-based welding rods |
| CN115975513B (en) * | 2023-03-16 | 2023-08-04 | 天津市金桥焊材集团股份有限公司 | Adhesive for producing welding rod |
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