CN104708231A - Sintered flux for nickel base strip electrode electro-slag welding - Google Patents
Sintered flux for nickel base strip electrode electro-slag welding Download PDFInfo
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- CN104708231A CN104708231A CN201510117736.1A CN201510117736A CN104708231A CN 104708231 A CN104708231 A CN 104708231A CN 201510117736 A CN201510117736 A CN 201510117736A CN 104708231 A CN104708231 A CN 104708231A
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- nickel
- sintered flux
- base strip
- welding
- dry powder
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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
- B23K35/36—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
- B23K25/00—Slag welding, i.e. using a heated layer or mass of powder, slag, or the like in contact with the material to be joined
Abstract
The invention relates to sintered flux for nickel strip electrode electro-slag welding. The sintered flux for the nickel strip electrode electro-slag welding is characterized in that the intered flux is prepared from dry powder components and binder water glass; the dry powder components comprise, by mass, 45-75% of CaF2, 15-35% of Al2O3, 1-5% of SiO2, 1-5% of CaO, 1-5% of MgO, 1-10% of sodium fluoroaluminate, 1-5% of rare earth fluoride and 1-5% of ferroniobium alloy powder; the ratio of potassium to sodium of the binder water glass is 1 to 1, the molar ratio is 2.2-3.5, the baume degree at room temperature is 38-50, and the dosage is 15-25% of the weight of the dry powder. The sintered flux can be used through being matched with various nickel base welding strip such as EQNiCrMo-3 and EQNiCr-3, when strip electrode electro-slag surfacing is conducted through matching with the nickel base welding strip, stable electro-slag process and welding technological property can be maintained at the quick welding condition of 250 mm/min, the quality of formation of surfacing layers is good, defects do not exist in lap joint, and various indexes of the surfacing layers can meet usage requirements of users.
Description
Technical field
The invention belongs to field of welding material, particularly a kind of nickel-base strip pole electroslag welding sintered flux.This solder flux mainly coordinates Ni-based welding, the inner wall surface built-up welding nickle-base corrosion-resisting layer such as hydrogenation plant, Coal Chemical Industry, nuclear vessel, urea equipment in petrochemical industry.
Background technology
Abros refers to nickel and is base (nickel content >=50%) and containing the alloying element such as Cr, Mo, Cu, Al, Ti, Nb, has excellent corrosion resistance and be mainly used in the alloy of corrosion-resistant purposes in corrosive environment.Due to abros corrosion resistance mainly contained by it chemical composition (alloying element) decide, and the matrix of alloy is all again face-centred cubic austenitic structure, therefore abros is all classify with the feature of main alloy element contained by it, mainly contains ambrose alloy, nickel chromium triangle, nickel molybdenum, Ni-Cr-Mo and Ni-Cr-Mo copper five class.
Abros has unique physics, mechanics and decay resistance.The erosion of abros various corrosive medium of ability within the scope of 200 DEG C to 1090 DEG C.There is good high temperature and cryogenic mechanics performance simultaneously.Therefore, be used widely in many fields such as chemistry, oil, hydrometallurgy, space flight, aviation, ocean development, atomic energy.Solve general stainless steel and other metals, the insurmountable engineering etching problem of nonmetallic materials.
In recent years, along with lasting, the high speed development of China's economy, industrial circle is also more and more higher for the requirement of equipment manufacturing, particularly some special installation such as large chemical equipment, nuclear vessel, service condition is extremely harsh, and common steel are difficult to reach its instructions for use.So far, most economical effective solution is at the Ni-based overcoat of equipment inner wall built-up welding.
For large-area built-up welding, traditional manual electric arc welding and filament submerged arc bead welding deposition efficiency is low and surfacing layer quality is poor.In the field, mostly adopt strip surfacing technology both at home and abroad, this technology has been welded with significant progress than manual electric arc welding and filament submerged arc in deposition rate.Strip electrode electroslag surfacing technology in strip surfacing is the resistance heat fusing welding, solder flux and the mother metal that utilize conductive slag, the advantage such as dilution rate is low because it has, solder flux loss is few, cladding efficiency is high, deposited metal is pure and overlaying shaping is attractive in appearance, at home and abroad obtains developing rapidly and general application.
At present, the main dependence on import of nickel-base strip electrode electroslag surfacing wlding, and the drawback such as import wlding has that production cost is high, delivery cycle is long.The domestic producer of nickel-base strip electrode electroslag surfacing wlding that can provide is less, and the Research Literature of association area is very limited, does not temporarily retrieve the related invention patent of nickel-base strip electrode electroslag surfacing solder flux.Therefore, nickel-base strip electrode electroslag surfacing wlding provided by the invention is significant.
Summary of the invention
The object of the present invention is to provide a kind of nickel-base strip pole electroslag welding sintered flux.Fact proved, sintered flux welding technological properties provided by the invention is excellent, and Electroslag Process is stablized, spatter is little, and hot deslag performance is good, welding bead beautiful appearance, lap-joint's flatness is good, particularly in the fast fast welding situation reaching 250mm/min of built-up welding weldering, still can keep comprehensively excellent performance.The indices of overlay cladding all meets relevant criterion and technical requirements of users, and solder flux mass production applications be subject to the affirmative of user, completely can import substitutes.
First aspect present invention provides a kind of nickel-base strip pole electroslag welding sintered flux, and it is prepared from by the dry powder of various ingredients and water glass of binder, and it is characterized in that, in described dry powder, the weight of each component is: CaF
245 ~ 75 weight portions, Al
2o
315 ~ 35 weight portions, SiO
21 ~ 5 weight portion, CaO 1 ~ 5 weight portion, MgO 1 ~ 5 weight portion, cryolite 1 ~ 10 weight portion, rare earth fluoride 1 ~ 5 weight portion, ferrocolumbium powder 1 ~ 5 weight portion; Binding agent is potassium sodium than the waterglass for 1:1, and the weight ratio of itself and dry powder is 15 ~ 25:100.
Or first aspect present invention provides a kind of nickel-base strip pole electroslag welding sintered flux, it is prepared from by the dry powder of various ingredients and water glass of binder, and it is characterized in that, in described dry powder, the percentage by weight of each component is: CaF
245 ~ 75%, Al
2o
315 ~ 35%, SiO
21 ~ 5%, CaO 1 ~ 5%, MgO 1 ~ 5%, cryolite 1 ~ 10%, rare earth fluoride 1 ~ 5%, ferrocolumbium powder 1 ~ 5%; Binding agent is the waterglass that potassium sodium ratio is 1:1, and its addition accounts for 15 ~ 25% of dry powder proportion.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said CaF
2add with fluorite form.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said MgO adds with fused magnesite form.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said Al
2o
3, CaO and SiO2 be selected from following material forms to add: corundum, potter's clay, marble, chalk, wollastonite etc.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said cryolite adds with ice crystal form.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said rare earth fluoride is a kind of reddish white powder.It is reacted by rare earth hydrate or rare earth chloride solution and hydrofluoric acid and is obtained.Typically, its fusing point 1460 DEG C, boiling point 2300 DEG C.Usually water insoluble, hydrochloric acid, nitric acid, sulfuric acid, can perchloric acid be dissolved in.Can be used for the luminescent material and steel additive agent etc. of film arc carbon, searchlight carbon-point etc.Rare earth fluoride can be buied from the market, and in the present invention, if not otherwise specified, rare earth fluoride used is buied all from the market.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said ferrocolumbium powder is the iron alloy powder containing Nb 60 ~ 70%.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, wherein said waterglass is the waterglass that potassium sodium ratio is 1:1, and its modulus is 2.2 ~ 3.5, and under room temperature, Baume degrees is 38 ~ 50.Described waterglass can be buied from the market, and in the present invention, if not otherwise specified, waterglass used is buied all from the market.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, it is first: CaF
245 ~ 75%, Al
2o
315 ~ 35%, SiO
21 ~ 5%, the dry powder blend of CaO 1 ~ 5%, MgO 1 ~ 5%, cryolite 1 ~ 10%, rare earth fluoride 1 ~ 5%, ferrocolumbium powder 1 ~ 5% evenly after, add that to account for dry powder proportion be that the potassium sodium of 15 ~ 25% is than the waterglass wet mixing granulation of 1:1 again, again through 200 ~ 350 DEG C of low temperature drying 30 ~ 50min, through 750 ~ 850 DEG C of high temperature sintering 30 ~ 60min after screening, then through supercooling, lifting, screening, packaging and making.
Nickel-base strip pole electroslag welding sintered flux according to a first aspect of the present invention, its particle size range is 20 ~ 80 orders.
Arbitrary embodiment of either side of the present invention, can combine with other embodiment, as long as they there will not be contradiction.In addition, in arbitrary embodiment of either side of the present invention, arbitrary technical characteristic goes for this technical characteristic in other embodiment, as long as they there will not be contradiction.
The invention will be further described below.
All documents that the present invention quotes from, their full content is incorporated to herein by reference, and if the implication expressed by these documents and the present invention inconsistent time, be as the criterion with statement of the present invention.In addition, the various term that the present invention uses and phrase have and well known to a person skilled in the art general sense, nonetheless, the present invention still wishes to be described in more detail at this these terms and phrase and to explain, the term mentioned and phrase, if any inconsistent with common art-recognized meanings, are as the criterion with the implication that the present invention states.
Details are as follows in the effect of each component of nickel-base strip pole electroslag welding sintered flux that the present invention relates to:
Generally speaking, CaF
2main Function be slag making, conduction and dehydrogenation, be also simultaneously the key that Electroslag Process carries out smoothly.Along with CaF
2the increase of adding proportion, the electrical conductivity of slag increases gradually, when electrical conductivity increases to a certain degree, the quick foundation of the resistance heat guarantee Electroslag Process of generation and the stable of electroslag molten bath, thus ensure the stable of whole electroslag welding process.But too much CaF
2can make that electrical conductivity is too high, viscosity coefficient of dross reduces, affect stability and the welding bead Forming Quality of electroslag welding.
Generally speaking, Al
2o
3add the physical property that can adjust solder flux slag in right amount, regulate the electric arc in welding process and Electroslag Process, and improve skull and appearance of weld to a certain extent.
Generally speaking, CaO, SiO
2main plaing a part balances solder flux acid-base value and slag making.CaO can improve the basicity of welding slag, improves the mechanical performance of overlay cladding deposited metal.SiO
2reduce the basicity of slag, but there is the effect adjusting slag fluidity, refinement molten drop and improve appearance of weld.
Generally speaking, MgO adds mainly as slag former, and it can improve the basicity of slag, increases gas permeability and the surface tension of slag, improves the removability of slag of solder flux.
Generally speaking, shoddye effect is played in adding of cryolite, improves bead welding Forming Quality to a certain extent.
Generally speaking, rare earth fluoride add the stability adding Electroslag Process, decrease the splashing in welding process to a certain extent.Although cryolite and acting on of rare earth fluoride are known in the art as mentioned above, but its technique effect presented in the present invention is beat all completely.
In the present invention, ferrocolumbium powder (being also called ferro-niobium powder in the present invention) add the effect with the dilution of supplementary effective alloying element and scaling loss.
The invention provides a kind of nickel-base strip pole electroslag welding sintered flux.
In the present invention, for the feature of the high easily scaling loss of nickel-bass alloy material alloying element content, for reducing the scaling loss of alloying element, improve the transfer coefficient of alloying element, ensure the purity of deposited metal, the solder flux invented adopts fluorine alkaline type slag system and adds appropriate ferrocolumbium, and, the raw-material quality of strict control, reduces the objectionable impurities brought in raw material.
In the present invention, for the particularity of nickel-base alloy liquid metal flows difference, under 250mm/min fast welding condition, still can keep stable Electroslag Process and excellent overlaying shaping quality for reaching, have adjusted key component CaF in dry powder
2, Al
2o
3content, trickle adjustment has been done to the addition of CaO, SiO2, MgO, and has introduced appropriate cryolite, rare earth fluoride, designed rational flux composition.
In the present invention, for ensureing the quality of solder flux, binding agent adopts potassium sodium than the waterglass for 1:1, its modulus is 2.2 ~ 3.5, and under room temperature, Baume degrees is 38 ~ 50, and dry powder is through wet mixing granulation, again through 200 ~ 350 DEG C of low temperature drying 30 ~ 50min, through 750 ~ 850 DEG C of high temperature sintering 30 ~ 60min after screening, then make through cooling, lifting, screening, packaging, flux particle size controls within the scope of 20 ~ 80 orders.
In the present invention, described sintered flux mainly coordinate Ni-based welding under arms condition harshness large-scale container internal wall strip electrode electroslag surfacing use, the solder flux of the present invention's design is when welding, Electroslag Process is stablized, spatter is little, and hot deslag performance is good, welding bead beautiful appearance, lap-joint's flatness is good, and the indices of overlay cladding all meets relevant criterion and technical requirements of users.And, use this solder flux ESW to weld scooter 250mm/min, improve built-up welding welding efficiency.
In one embodiment of the invention, described nickel-base strip pole electroslag welding sintered flux is welding-solder flux combination, and weld overlay alloy melting loss of elements amount is little, increases C amount low, the impurity element increments such as S, P are little, and the index of weld overlay alloy element meets domestic and international relevant criterion and technical requirements of users.
The advantage that sintered flux of the present invention compared with prior art has:
1, sintered flux provided by the invention have employed rational slag system, optimize the addition of each component in slag system, well have adjusted the electrical conductivity of slag, viscosity, surface tension and mobility, it coordinates Nickel-based Welding Strip Surfacing still can keep stable Electroslag Process and welding technological properties under 250mm/min fast welding condition, and, overlaying shaping is superior in quality, lap-joint's zero defect.
2, sintered flux provided by the invention is prepared from by selected raw material, its basicity is moderate, the multiple Ni-based welding such as EQNiCrMo-3, EQNiCr-3 can be coordinated to use, when it coordinates Ni-based welding to weld, alloying element scaling loss is few, impurity element increment is low, and gained surfacing layer metal has excellent decay resistance.
Accompanying drawing explanation
Fig. 1 is built-up welding test plate (panel) sample position figure, and wherein: A is chemical composition sample position, B is chloride stress cracking corrosion test sample position, and C is Huey test sample position, and D is side bend test sample position.
Detailed description of the invention
Can be conducted further description the present invention by the following examples, but scope of the present invention is not limited to following embodiment.One of skill in the art can understand, and under the prerequisite not deviating from the spirit and scope of the present invention, can carry out various change and modification to the present invention.The present invention carries out generality and/or concrete description to the material used in test and test method.Although for realizing many materials that the object of the invention uses and method of operating is well known in the art, the present invention still describes in detail as far as possible at this.Following examples further illustrate the present invention, instead of restriction the present invention.
embodiment 1 ~ 10
According to the component of dry powder in the sintered flux of the present invention's design, prepare 10 kinds of dry powder and the corresponding 10 kinds of waterglass additions of difference, be numbered Z1 ~ Z10.
The weight percentage of 10 kinds of sintered flux dry powder components and waterglass addition are in table 1, and solder flux preparation method is as follows:
Required sintered flux dry powder is carried out proportioning by formula weigh, review to put into after gross weight and be dry mixed device and be dry mixed 20min, be dry mixed evenly and pour wet-mixing device into, the waterglass adding requirement carries out wet-mixing, after wet-mixing evenly, wet-milling is sent into granulation disc by conveyer belt and carry out granulation, low-temp. drying stove is sent into through conveyer belt after granulation completes, 30 ~ 50min is dried at 250 ~ 300 DEG C, then promote through elevator and sieve, semi-finished product solder flux after screening within the scope of standard particle size is dropped into high temperature klining knot, 30 ~ 60min is sintered under 750 ~ 850 DEG C of high temperature, through cooling after kiln discharge, promote, screening (its particle size range is 20 ~ 80 orders), pack and make solder flux finished product.In these embodiments, CaF
2add with fluorite form, MgO adds with fused magnesite form.Al
2o
3be add with the form of potter's clay, CaO adds with marmorean form, and SiO2 adds with the form of wollastonite.Cryolite adds with ice crystal form.Ferrocolumbium powder used is the iron alloy powder containing Nb 65%.Waterglass used is the waterglass that potassium sodium ratio is 1:1, and its modulus is 2.9, and under room temperature, Baume degrees is 43.
The weight proportion of table 1:10 kind sintered flux dry powder component and waterglass addition (being weight portion)
| Numbering | CaF2 | Al2O3 | SiO2 | CaO | MgO | Cryolite | Rare earth fluoride | Ferro-niobium powder | Waterglass |
| Z1 | 45 | 35 | 3 | 2 | 3 | 3 | 5 | 4 | 19 |
| Z2 | 53 | 26 | 2 | 5 | 1 | 7 | 1 | 5 | 20 |
| Z3 | 55 | 29 | 3 | 3 | 2 | 4 | 3 | 1 | 15 |
| Z4 | 57 | 26 | 1 | 2 | 2 | 10 | 1 | 1 | 21 |
| Z5 | 60 | 27 | 4 | 2 | 1 | 2 | 2 | 2 | 20 |
| Z6 | 62 | 23 | 5 | 1 | 4 | 2 | 1 | 2 | 20.5 |
| Z7 | 65 | 20 | 3 | 3 | 5 | 1 | 1.5 | 1.5 | 22 |
| Z8 | 68 | 18 | 2 | 4 | 3 | 1 | 2 | 2 | 25 |
| Z9 | 70 | 19 | 1 | 1 | 2 | 3 | 3 | 1 | 22.5 |
| Z10 | 75 | 15 | 3 | 1 | 1 | 2 | 2 | 1 | 21 |
(for typical EQNiCrMo-3 welding, welding specification: 60mm wide * 0.5mm is thick with Ni-based welding respectively for the various solder flux finished products prepared; Have been found that if use EQNiCr-3 welding instead, test, hereafter test performance result and use EQNiCrMo-3 no significant difference) coordinate and carry out overlay welding experiment, built-up welding is two-layer altogether, and test quality of parent material is 16MnR, thickness of slab 40mm.The assay method of various mensuration project is all assay methods of this area routine.
Nickel-base strip electrode electroslag surfacing process parameter is in table 2.
Table 2: nickel-base strip electrode electroslag surfacing process parameter
| Voltage (V) | Electric current (A) | Weldering speed (mm/min) | Stem elongation (mm) | Amount of lap (mm) | Temperature (DEG C) between road |
| 23～25 | 800～1050 | 160～250 | 35～45 | 8～10 | ＜150 |
The welding technological properties index of embodiment of the present invention Z1 ~ Z10 totally 10 kinds of solder flux is in table 3.
The welding technological properties index of table 3:Z1 ~ Z10 totally 10 kinds of solder flux
Chemical analysis is carried out in sampling in accordance with the following steps: first shoot off from surface 2.0mm, then samples within the scope of 2.0 ~ 2.5mm; Respectively according to NB/T47014-2011, ASTM A262C method (HUEY method) and YB/T5362-2006, carry out preparation and the test of side bend test sample, Huey test sample and chloride stress cracking corrosion test sample.Fig. 1 is seen in sample position.
Welding and surfacing layer metal chemical composition are in table 4 (sampling observation Z1, Z3, Z5, Z7, Z10 five samples).
Table 4: welding and surfacing layer metal chemical composition
| C | Si | Mn | S | P | Cr | Ni | Mo | Nb | Fe | Cu | |
| EQNiCrMo-3 welding | 0.018 | 0.2 | 0.2 | 0.004 | 0.008 | 22.02 | 63.4 | 9.28 | 3.58 | 0.34 | 0.02 |
| Z1 surfacing layer metal | 0.020 | 0.38 | 0.14 | 0.005 | 0.010 | 21.53 | 61.8 | 8.85 | 3.56 | 2.51 | 0.03 |
| Z3 surfacing layer metal | 0.021 | 0.35 | 0.17 | 0.004 | 0.009 | 21.62 | 62.0 | 8.86 | 3.34 | 2.60 | 0.02 |
| Z5 surfacing layer metal | 0.020 | 0.39 | 0.15 | 0.005 | 0.009 | 21.68 | 61.9 | 8.90 | 3.45 | 2.55 | 0.02 |
| Z7 surfacing layer metal | 0.019 | 0.37 | 0.13 | 0.004 | 0.009 | 21.93 | 62.2 | 8.92 | 3.40 | 2.42 | 0.02 |
| Z10 surfacing layer metal | 0.018 | 0.38 | 0.15 | 0.005 | 0.009 | 21.82 | 62.1 | 8.89 | 3.32 | 2.49 | 0.03 |
In addition after measured, in the surfacing layer metal chemical composition of Z2, Z4, Z6, Z8, Z9 five samples and upper table, the surfacing layer metal chemical composition of each sample of the present invention is substantially suitable, without significant difference.
Surfacing layer metal bend test the results are shown in Table 5 (sampling observation Z3, Z5, Z7 tri-samples).
Table 5: surfacing layer metal side bend test result
Note: heat treatment state 690 DEG C of * 8h
In addition after measured, in the surfacing layer metal side bend test result of Z1, Z2, Z4, Z6, Z8, Z9, Z10 seven samples and upper table, the surfacing layer metal side bend test result of each sample of the present invention is substantially suitable, does not all find crackle, without significant difference.
Surfacing layer metal Huey test the results are shown in Table 6 (sampling observation sample Z5).
Table 6:Z5 surfacing layer metal Huey test result
Note:
(1) state: heat treatment 690 DEG C of * 8h.
(2) establishing criteria ASTM A262-2010 C method, carries out test 48h × 5 week after date, and observe with 10 times of magnifying glasses, all do not find that intercrystalline corrosion is inclined to, maximum corrosion rate is the 0.071mm/ month, and average corrosion rate is the 0.065mm/ month.
(3) corrosion rate (the mm/ month)=(7290 × W)/A × d × t
Wherein: t=etching time, h
A=surface area, cm
2
W=is weightless, g
D=density, g/cm
3
In addition; shown in other 9 samples reference tables 6 prepared by foregoing embodiments of the present invention, the test method of result measures; result corrosion rate is substantially identical with Z5 result, and the mean value of corrosion rate is all within 0.058 ~ 0.069mm/ month, and display has slowly corrosion rate.With the corrosion rate <0.075mm/ month be one-level, corrosion rate 0.075 ~ 0.10mm/ month is secondary, the corrosion rate >0.10/ month be three grades for criterion.In a complementary testing, with reference to batching and the method for making of foregoing embodiments Z1 ~ Z10, different is only do not add cryolite and rare earth fluoride, or different is only do not add cryolite, or different is only do not add rare earth fluoride, prepare these solder flux finished product samples, their are secondary or three grades according to the corrosion rate that upper method measures.
The resistance to chloride stress corrosion (cracking) test of surfacing layer metal the results are shown in Table 7 (sampling observation sample Z5).
Table 7:Z5 surfacing layer metal resistance to chloride stress corrosion (cracking) test result
| Test number | Test section is wide/mm | Test section is thick/mm | Sectional area/mm 2 | Loading stress/mp a | Crackle/fracture |
| 1 | 2.90 | 1.96 | 5.68 | 243 | Flawless |
| 2 | 2.90 | 2.02 | 5.86 | 243 | Flawless |
| 3 | 2.86 | 2.02 | 5.78 | 243 | Flawless |
Note:
(1) state: heat treatment 690 DEG C of * 8h.
(2) establishing criteria YB/T5362-2006 carries out chloride stress cracking corrosion test, 143 ± 1 DEG C (boiling), after the periodic test of 96h × 2, observes, all do not find crackle with 10 times of magnifying glasses.
In addition after measured, in the surfacing layer metal resistance to chloride stress corrosion (cracking) test result of Z1, Z2, Z3, Z4, Z6, Z7, Z8, Z9, Z10 nine samples and upper table, the surfacing layer metal resistance to chloride stress corrosion (cracking) test result of sample of the present invention is substantially suitable, all do not find crackle, without significant difference.
Claims (10)
1. a nickel-base strip pole electroslag welding sintered flux, it is prepared from by the dry powder of various ingredients and water glass of binder, and it is characterized in that, in described dry powder, the weight of each component is: CaF
245 ~ 75 weight portions, Al
2o
315 ~ 35 weight portions, SiO
21 ~ 5 weight portion, CaO1 ~ 5 weight portion, MgO 1 ~ 5 weight portion, cryolite 1 ~ 10 weight portion, rare earth fluoride 1 ~ 5 weight portion, ferrocolumbium powder 1 ~ 5 weight portion; Binding agent is potassium sodium than the waterglass for 1:1, and the weight ratio of itself and dry powder is 15 ~ 25:100.
2. a nickel-base strip pole electroslag welding sintered flux, it is prepared from by the dry powder of various ingredients and water glass of binder, and it is characterized in that, in described dry powder, the percentage by weight of each component is: CaF
245 ~ 75%, Al
2o
315 ~ 35%, SiO
21 ~ 5%, CaO 1 ~ 5%, MgO 1 ~ 5%, cryolite 1 ~ 10%, rare earth fluoride 1 ~ 5%, ferrocolumbium powder 1 ~ 5%; Binding agent is the waterglass that potassium sodium ratio is 1:1, and its addition accounts for 15 ~ 25% of dry powder proportion.
3. according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said CaF
2add with fluorite form.
4., according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said MgO adds with fused magnesite form.
5. according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said Al
2o
3, CaO and SiO2 be selected from following material forms to add: corundum, potter's clay, marble, chalk, wollastonite etc.
6., according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said cryolite adds with ice crystal form.
7., according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said ferrocolumbium powder is the iron alloy powder containing Nb 60 ~ 70%.
8., according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, wherein said waterglass is the waterglass that potassium sodium ratio is 1:1, and its modulus is 2.2 ~ 3.5, and under room temperature, Baume degrees is 38 ~ 50.Or it coordinates the multiple Ni-based welding such as EQNiCrMo-3, EQNiCr-3 to use, and is mainly used at large-scale container internal wall surface band pole submerged arc overlay welding nickle-base corrosion-resisting layer.
9. according to the nickel-base strip pole electroslag welding sintered flux of claim 1 or 2, its preparation method is: by percentage by weight (or in ratio being changed to weight portion mentioned above) be first: CaF
245 ~ 75%, Al
2o
315 ~ 35%, SiO
21 ~ 5%, the dry powder blend of CaO 1 ~ 5%, MgO 1 ~ 5%, cryolite 1 ~ 10%, rare earth fluoride 1 ~ 5%, ferrocolumbium powder 1 ~ 5% evenly after, add that to account for dry powder proportion be that the potassium sodium of 15 ~ 25% is than the waterglass wet mixing granulation of 1:1 again, again through 200 ~ 350 DEG C of low temperature drying 30 ~ 50min, through 750 ~ 850 DEG C of high temperature sintering 30 ~ 60min after screening, again through supercooling, lifting, screening, packaging, to obtain final product.
10. electroslag welding sintered flux in nickel-base strip pole according to claim 9, the particle size range of wherein said nickel-base strip pole electroslag welding sintered flux is 20 ~ 80 orders.
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| CN105195924A (en) * | 2015-09-25 | 2015-12-30 | 机械科学研究院哈尔滨焊接研究所 | Nickel baseband pole electroslag surfacing sintering flux and preparation method |
| CN106514053A (en) * | 2016-11-04 | 2017-03-22 | 四川大西洋焊接材料股份有限公司 | Sintering flux used for stainless steel high-speed electro-slag strip surfacing and preparation method for same |
| CN108057964A (en) * | 2017-12-12 | 2018-05-22 | 北京金威焊材有限公司 | Ni-based filament sintered flux used for submerged arc welding |
| CN110238493A (en) * | 2019-06-25 | 2019-09-17 | 钢铁研究总院 | A kind of submerged arc welding flux and preparation method thereof, welding wire for submerged-arc welding, SAW consumable material and its application |
| CN111037156A (en) * | 2019-12-24 | 2020-04-21 | 胡隆燕 | Preparation method of regulating particles for sintered flux |
| CN114850724A (en) * | 2022-06-17 | 2022-08-05 | 中国船舶重工集团公司第七二五研究所 | High-alkaline sintered flux for submerged-arc welding of austenitic low-temperature steel and preparation method thereof |
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| CN108057964A (en) * | 2017-12-12 | 2018-05-22 | 北京金威焊材有限公司 | Ni-based filament sintered flux used for submerged arc welding |
| CN110238493A (en) * | 2019-06-25 | 2019-09-17 | 钢铁研究总院 | A kind of submerged arc welding flux and preparation method thereof, welding wire for submerged-arc welding, SAW consumable material and its application |
| CN111037156A (en) * | 2019-12-24 | 2020-04-21 | 胡隆燕 | Preparation method of regulating particles for sintered flux |
| CN114850724A (en) * | 2022-06-17 | 2022-08-05 | 中国船舶重工集团公司第七二五研究所 | High-alkaline sintered flux for submerged-arc welding of austenitic low-temperature steel and preparation method thereof |
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