CN105108379A - Welding electrode compatible with Ni9 steel and capable of being used in cryogenic environment and preparation method thereof - Google Patents
Welding electrode compatible with Ni9 steel and capable of being used in cryogenic environment and preparation method thereof Download PDFInfo
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- CN105108379A CN105108379A CN201510638751.0A CN201510638751A CN105108379A CN 105108379 A CN105108379 A CN 105108379A CN 201510638751 A CN201510638751 A CN 201510638751A CN 105108379 A CN105108379 A CN 105108379A
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- welding rod
- medicinal powder
- cryogenic environment
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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
- B23K35/362—Selection of compositions of fluxes
-
- 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 relates to a welding electrode compatible with Ni9 steel and capable of being used in the cryogenic environment and a preparation method thereof. The welding electrode comprises a welding core, powder and a binder, the mass ratio of the powder to the welding electrode is 22-26 to 100, and the mass ratio of the powder to the binder is 100 to 25-30. The raw materials of the powder comprise, by mass, 7%-12% of marble, 3%-5% of fluorite, 0.4%-0.7% of manganese metal, 0.1%-0.2% of soda ash, 0.15%-0.30% of CMC, 0.6%-0.8% of titanium dioxide, 2.5%-4.0% of barium carbonate, 3.5%-8.0% of rutile, 0.075%-0.2% of tungsten powder, 0.5%-0.9% of chromium metal and 0.5%-1.2% of sodium fluoride. The prepared welding electrode meets the requirement of ENiCrMo-4 in AWS A5.11, when welding is conducted on the welding electrode, the electric arc is stable, splashing is less, sediment separation is good, molding is attractive, and all-position operating performance is good.
Description
Technical field
The invention belongs to field of welding material, be specifically related to a kind of with supporting welding rod that can be used for cryogenic environment of Ni9 steel and preparation method thereof.
Background technology
9%Ni steel is the medium alloy steel of the W (Ni) one 9% of nineteen forty-four exploitation, and by the product research laboratory development success of International nickel Co. Ltd. Inco. Ltd. of the U.S., it is a kind of low-carbon (LC) quenched and tempered steel, is organized as martensite and adds bainite.This steel have good toughness and high strength under extremely low temperature, and to compare with aluminium alloy with austenitic stainless steel that to have coefficient of thermal expansion little, good economy performance, serviceability temperature is minimum reaches-196 DEG C, to have been proved not carry out since PWHT of stress relieving also can use safely by research from nineteen sixty, 9%Ni steel just becomes one of the main material for the manufacture of Large LNG storage tank.The main feature of steel is high nickel content, high cleanliness, higher-strength, high low-temperature impact toughness, good welds performance.But due to by the impact of ferrite content, in the cryogenic environment of-196 DEG C and lower ultralow temperature, its mechanical performance can be short of to some extent.
Summary of the invention
Goal of the invention of the present invention is, for above technical problem, to provide one to be particularly useful for cryogenic environment, still keeps the welding rod that can be used for cryogenic environment supporting with Ni9 steel of good mechanical properties in-196 DEG C and lower ultra-low temperature surroundings.
Another object of the present invention is to provide the above-described preparation method that can be used for the welding rod of cryogenic environment supporting with Ni9 steel.
To achieve these goals, concrete technical scheme of the present invention is:
The welding rod that can be used for cryogenic environment supporting with Ni9 steel, this welding rod comprises core wire, medicinal powder and binding agent, and wherein, medicinal powder and welding rod quality are than being 22-26:100, and medicinal powder and binding agent mass ratio are 100:25-30.
Account for the mass percent of welding rod with medicinal powder, in medicinal powder component raw material and mass percent as follows:
Marble 7-12%, fluorite 3-5%, manganese metal 0.4-0.7%, soda ash 0.1-0.2%, CMC0.15-0.30%, titanium dioxide 0.6-0.8%, brium carbonate 2.5-4.0%, rutile 3.5-8.0%, tungsten powder 0.075-0.2%, crome metal 0.5-0.9%, sodium fluoride 0.5-1.2%.
Described binding agent is the waterglass of the potassium sodium ratio 3:1 of 41-43Be ' under 20 DEG C of conditions, and modulus is 3.1M.
Further preferably, can be used in the welding rod of cryogenic environment with Ni9 steel is supporting, account for the mass percent of welding rod with medicinal powder, in medicinal powder component raw material and mass percent as follows:
Marble 8.7%, fluorite 4.7%, manganese metal 0.47%, soda ash 0.14%, CMC0.23%, titanium dioxide 0.7%, brium carbonate 3.5%, rutile 5.38%, tungsten powder 0.12%, crome metal 0.7%, sodium fluoride 0.7%.
The preparation method that can be used for the welding rod of cryogenic environment supporting with Ni9 steel, it comprises the following steps:
Step one, the powder of each for medicinal powder composition to be mixed in proportion;
Step 2, the binding agent adding the total composition quality 25-30% of medicinal powder are uniformly mixed (stirring carrying out being not less than 30min), send into welding rod and are coated with and are wrapped on core wire by the pressure of 14-16MPa in press;
Step 3, again through low temperature 80-90 DEG C cure 1.5-2 hour, high temperature 300 DEG C cures and cures for 1-2 hour.
Adopt the welding rod that can be used for cryogenic environment supporting with Ni9 steel that the method prepares, the tensile strength >=690Mpa of its normal temperature deposited metal, yield strength >=400Mpa, percentage elongation >=22% ,-196 DEG C of impacts reach 47J.
In medicine core of the present invention, the Main Function of each composition is as follows:
Marble: also known as marble, be the limestone of recrystallization, main component is CaCO
3, commercially available prod.Use marble in welding rod, under the effect of arc heat, resolve into CaO and CO
2be in welding rod manufacture and conventional build slag gas generating materials, improve slag basicity, improve deposited metal degree of purity, reduce field trash amount, stable arc increases slag and metal interface tension force and surface tension, improves and takes off slag.
Fluorite: fluorite is also calcirm-fluoride, is a kind of common haloid deposit, can commercially availablely buys.The fusing point of adjustment slag and viscosity, increase the mobility of slag, improve the physical property of slag, and shaping, the de-slag of butt welded seam etc. plays a crucial role, and is also the main material reducing diffusible hydrogen in weld seam.But because of the existence of fluorine, electric arc can be caused unstable, and produce toxic gas, should conservative control ratio.
Rutile: effect mainly stabilising arc, the slag making of rutile, can regulate the fusing point of slag, viscosity, surface tension and mobility, improves appearance of weld, reduces to splash.Butt welded seam is shaped, arc stability plays a crucial role.
Titanium dioxide: play fluxing effect, have stable arc, improve slag physical property (improving the removability of slag, appearance of weld etc.), increases viscosity and the plasticity of coating.
Tungsten powder; Take tungsten oxide as raw material, with hydrogen reducing in four pipe Muffle furnaces or multi-tube furnace, granularity is from 0.6-30 micron.Main point carse, medium and small several granularity, silver gray powder, impurity content take national standard as foundation, is commercially available prod.
Manganese metal: add the effect can playing desulfurization, deoxidation, to weld seam transition manganese element, can also improve weld strength.
Soda ash, CMC: the extrusion performance of welding rod can be improved, simultaneously also have stabilising arc effect, but addition is crossed and is caused the easy moisture absorption of medicinal powder at most.
CMC: carboxymethyl cellulose, commercially available prod.
Namely the present invention is coordinated with Ni-Cr-Mo core wire thus is achieved object of the present invention by organic assembly of above-mentioned medicinal powder composition.
Good effect of the present invention is:
(1) arc stability when, there is welding, splash that less, de-slag is good, appearance of weld is attractive in appearance, all-position welding function admirable; Especially use under cryogenic environment and still there is good combination property.
(2), adopt welding rod of the present invention to 9Ni steel large-scale low-temperature welding in storage tank, its weld seam (deposited metal) mechanical property: Rp0.2:503MPa, Rm:730MPa, A:42.5%,-196 DEG C of average impact merits are greater than 47J, meet the welding requirements of Ni9 steel large-scale storage tank under cryogenic environment completely, and the premium properties of mother metal can be given full play to, increase substantially the feature such as serviceability and life-span of large-scale storage tank.
Detailed description of the invention
Below in conjunction with instantiation, explanation is explained in detail to the present invention, but this should be interpreted as that the above-mentioned subject area of the present invention is only limitted to following embodiment.
Following examples Raw and core wire come from market and buy and obtain; 9Ni steel is welded, detects the performance of deposited metal at normal temperatures.
Embodiment 1:
Prepare a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel, this welding rod comprises core wire, medicinal powder and binding agent, and wherein, medicinal powder and welding rod quality are than being 22-26:100, and medicinal powder and binding agent mass ratio are 100:25-30.Account for the mass percent of welding rod with medicinal powder, in medicinal powder each group raw material and mass percentage as follows:
Marble 9.2%, fluorite 4.7%, manganese metal 0.55%, soda ash 0.14%, CMC0.23%, titanium dioxide 0.7%, brium carbonate 2.8%, rutile 5.5%, tungsten powder 0.12%, crome metal 0.7%, sodium fluoride 0.7%.
Get core wire quality 69.64%, composition meets following requirement (wt%): core wire Ingredient percent is CC0.07-0.10%, Mn1.0-1.5, Si≤0.10, S :≤0.004, P≤0.005, Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10, Fe4.0-5.0, Nb2.0-2.5, W0.8-1.2, surplus is nickel and trace impurity, and in above core wire, the gross weight of each composition is 100%.
Detailed preparation method is:
Each component in above-mentioned medicinal powder mixed, add the potassium-sodium water glass of 41-43Be ' under the 20 DEG C of conditions accounting for medicinal powder gross mass content 27%, modulus is 3.1M, carries out the stirring of 50min.Be wrapped on core wire on hydraulic type welding rod production equipment with common process.Again through low temperature 80-90 DEG C cure 1.5-2 hour, high temperature 300 DEG C cures and cures for 1-2 hour.
Embodiment 2:
Prepare a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel, account for the mass percent of welding rod with medicinal powder, in medicinal powder each group raw material and mass percentage as follows:
Marble 10.0%, fluorite 3.5%, manganese metal 0.55%, soda ash 0.14%, CMC0.23%, titanium dioxide 0.7%, brium carbonate 2.5%, rutile 3.5%, tungsten powder 0.12%, crome metal 0.7%, sodium fluoride 0.7%.
Binding agent accounts for medicinal powder gross mass content 28%.
Core wire accounts for 73.42% of total welding rod.
Other step of preparation method is as recorded in embodiment 1.
Embodiment 3:
A kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel of the present invention, need the strict content controlling the impurity element of deposited metal, adopt the excellent silk meeting following component requirements to produce this welding rod, adopt basic slag system to ensure that deposited metal obtains good mechanical property.
Prepare a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel, account for the mass percent of welding rod with medicinal powder, coating respectively organizes raw material and mass percentage is as follows:
Marble 8.7%, fluorite 4.7%, manganese metal 0.47%, soda ash 0.14%, CMC0.23%, titanium dioxide 0.7%, brium carbonate 3.5%, rutile 5.38%, tungsten powder 0.12%, crome metal 0.7%, sodium fluoride 0.7%.
Get core wire quality 372.1g, composition meets following requirement (wt%): core wire Ingredient percent is C0.07-0.10%, Mn1.0-1.5, Si≤0.10, S :≤0.004, P≤0.005, Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10, Fe4.0-5.0, Nb2.0-2.5, W0.8-1.2, surplus is nickel and trace impurity, and in above core wire, the gross weight of each composition is 100%.
Preparation method is: each for above-mentioned coating component mixed, and add the potassium-sodium water glass under the 20 DEG C of conditions accounting for medicinal powder gross mass content 26%, Baume concentration is the stirring of 41-43 ' Be, 40min.Be wrapped on core wire on hydraulic type welding rod production equipment with common process.Again through low temperature 80-90 DEG C cure 1.5-2 hour, high temperature 300 DEG C cures and cures for 1-2 hour.
Welding rod in embodiment 3 is carried out its result of the test of deposited metal mechanical property test as follows:
Deposited metal composition in table 1 example 3
| C | Mn | Si | S | P | Cr | Ni | Mo | Sb | Cu |
| 0.01 | 0.69 | 0.19 | 0.0069 | 0.0016 | 15.12 | 59.02 | 15.44 | 0.0065 | 0.00 |
| 2 | 83 | ||||||||
| Fe | W | Co | V | Nb | Ti | B | As | Sn | |
| 5.40 | 3.93 | 0.052 | 0.064 | 0.0027 | 0.022 | 0.0040 | 0.0020 | 0.0022 |
Deposited metal mechanical property in table 2 embodiment 3
From above data, embodiment 1-3 every experiment gained processing property of electrode is good: welding electric arc is all stable, splashing is less, de-slag is good, beautiful appearance, all positon good operation performance, and its performance meets AWSA5.11ENiCrMo-4 relevant criterion technical requirement.
The beds that the present invention is not limited to methanol-to-olefins heats up and catalyst regeneration device.The present invention extend to molecular sieve be carrier fixed bde catalyst heat up or catalyst regeneration device.Also any new feature of disclosing in this manual or any combination is newly extended to, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (8)
1. the supporting welding rod that can be used for cryogenic environment with Ni9 steel, this welding rod comprises core wire, medicinal powder and binding agent, it is characterized in that: medicinal powder and welding rod quality are than being 22-26:100, and the mass ratio of medicinal powder and binding agent is 100:25-30.
2. a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel according to claim 1, it is characterized in that: the mass percent accounting for welding rod with medicinal powder, medicinal powder comprises the raw material of following mass percent:
Marble 7-12%, fluorite 3-5%, manganese metal 0.4-0.7%, soda ash 0.1-0.2%, CMC0.15-0.30%, titanium dioxide 0.6-0.8%, brium carbonate 2.5-4.0%, rutile 3.5-8.0%, tungsten powder 0.075-0.2%, crome metal 0.5-0.9%, sodium fluoride 0.5-1.2%.
3. a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel according to claim 1, it is characterized in that: the mass percent accounting for welding rod with medicinal powder, medicinal powder comprises the raw material of following mass percent:
Marble 8.7%, fluorite 4.7%, manganese metal 0.47%, soda ash 0.14%, CMC0.23%, titanium dioxide 0.7%, brium carbonate 3.5%, rutile 5.38%, tungsten powder 0.12%, crome metal 0.7%, sodium fluoride 0.7%.
4. a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel according to claim 1, is characterized in that: described binding agent is that under 20 DEG C of conditions, the potassium sodium mol ratio of 41-43Be ' is the waterglass of 3:1, and modulus is 3.1M.
5. a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel according to claim 1, is characterized in that: core wire comprises the composition C0.07-0.10% that following mass percent is, Mn1.0-1.5, Si≤0.10, S :≤0.004, P≤0.005, Cr15.0-17.0, Mo3.5-4.0, Cu≤0.10, Fe4.0-5.0, Nb2.0-2.5, W0.8-1.2, surplus is nickel and trace impurity, and in above core wire, the gross weight of each composition is 100%.
6. a kind of welding rod of can be used for cryogenic environment supporting with Ni9 steel according to claim 1, is characterized in that: the tensile strength >=690Mpa of its deposited metal, yield strength >=400Mpa, percentage elongation >=22% ,-196 DEG C of impacts reach 47J.
7. preparation is a kind of as the supporting welding rod that can be used for cryogenic environment of a kind of and Ni9 steel in claim 1-6 as described in any one claim, it is characterized in that comprising the following steps:
Step one, the powder of each for medicinal powder composition to be mixed in proportion;
Step 2, the binding agent adding the total composition quality 25-30% of medicinal powder are uniformly mixed, and send into welding rod and are coated with and are wrapped on core wire by the pressure of 14-16MPa in press;
Step 3, again through low temperature 80-90 DEG C cure 1.5-2 hour, high temperature 300 DEG C cures and cures for 1-2 hour.
8., according to the supporting welding rod that can be used for cryogenic environment of a kind of and Ni9 steel described in claim 7, it is characterized in that: step 3 for again through low temperature 88 DEG C cure 2 hours, high temperature 300 DEG C cures and cures for 1.5 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112312A (en) * | 2016-08-24 | 2016-11-16 | 四川大西洋焊接材料股份有限公司 | Nichrome steel nickel-base welding rod and production method thereof for military project pneumatic system |
| 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 |
| CN111590240A (en) * | 2020-06-28 | 2020-08-28 | 昆山京群焊材科技有限公司 | 9% Ni steel matched nickel-based welding rod special for overhead welding |
| CN111618479A (en) * | 2020-06-28 | 2020-09-04 | 昆山京群焊材科技有限公司 | Welding rod for 5% Ni steel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111590240A (en) * | 2020-06-28 | 2020-08-28 | 昆山京群焊材科技有限公司 | 9% Ni steel matched nickel-based welding rod special for overhead welding |
| CN111618479A (en) * | 2020-06-28 | 2020-09-04 | 昆山京群焊材科技有限公司 | Welding rod for 5% Ni steel 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 |
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