CN112496593B - Solder fill compositions and methods and applications - Google Patents
Solder fill compositions and methods and applications Download PDFInfo
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- CN112496593B CN112496593B CN202011309664.8A CN202011309664A CN112496593B CN 112496593 B CN112496593 B CN 112496593B CN 202011309664 A CN202011309664 A CN 202011309664A CN 112496593 B CN112496593 B CN 112496593B
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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
- B23K35/3053—Fe as the principal constituent
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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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
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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
- B23K35/40—Making wire or rods for soldering or welding
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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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/324—Devices for supplying or evacuating a shielding or a welding powder, e.g. a magnetic powder
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Abstract
The invention belongs to the technical field of welding materials, and particularly relates to a welding filling composition, a method and application thereof, wherein the welding filling composition comprises the following components in parts by weight: 7-13 parts of rutile, 22-38 parts of reduced ilmenite, 3.5-4.5 parts of mica, 9-17 parts of feldspar, 10-18 parts of white mud, 8-14 parts of marble, 0.8-1.2 parts of latex, 7-11 parts of medium manganese, 0.4-0.6 part of nickel powder and 18-22 parts of sodium silicate. The welding filling composition has high welding quality and is easy to form.
Description
Technical Field
The invention relates to the technical field of welding materials, in particular to a welding filling composition, a method and application.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.
Along with the rapid development of gas industry, gas users are growing, the construction and maintenance work of natural gas pipelines is also growing rapidly, and part of pipelines laid in early stage are also in the aging period, the subsequent pipeline leakage and rush repair tasks are increasing,
at present, the manual tangent line connection and emergency repair work with gas mainly use the traditional material refractory soil to fill the pipeline joints and pipeline leakage points so as to achieve the effect of temporary plugging. Along with the requirement promotion and the environmental protection requirement improvement to the safety control, traditional material can not satisfy the requirement yet, simultaneously because the use of chamotte has increaseed the welded degree of difficulty, directly influences pipeline welding quality, the following problem of awaiting the opportune moment to solve in the welding field: 1. the conventional material is easy to form air holes and slag inclusion when used, which directly causes unqualified welding and shooting, and the quality is not too high, thereby bringing potential safety hazard to the operation of a pipe network. 2. The traditional material is easy to cause shallow weld penetration in the using process and is not easy to form during welding. 3. When the closure plate is welded, the traditional material is easy to cause air leakage of the plugged mud wall in the using process, and then welding is easy to cause fire, so that difficulty is brought to welding work. 4. Because the welding of pipelines with gas (gas refers to fuel gas) is a unique welding type of fuel gas operation enterprises, the welding method is relatively dependent on conventional materials in the industry, and similar materials which can be replaced are not available for a while.
Disclosure of Invention
The embodiment of the invention aims to provide a welding filling composition, a method and application thereof. The welding filling composition has high welding quality and is easy to form.
In one aspect, the invention provides a welding filling composition, which comprises the following components in parts by weight: 7-13 parts of rutile, 22-38 parts of reduced ilmenite, 3.5-4.5 parts of mica, 9-17 parts of feldspar, 10-18 parts of white mud, 8-14 parts of marble, 0.8-1.2 parts of latex, 7-11 parts of medium manganese, 0.4-0.6 part of nickel powder and 18-22 parts of sodium silicate.
Further, the preferable component proportion of the filling material comprises: 10 parts of rutile, 30 parts of reduced ilmenite, 4 parts of mica, 13 parts of feldspar, 14 parts of white mud, 11 parts of marble, 1 part of latex, 9 parts of medium manganese, 0.5 part of nickel powder and 20 parts of sodium silicate.
In a second aspect, the present invention provides a method for preparing a weld joint filling composition, where the weld joint composition is the above-mentioned weld joint composition, including the following steps:
respectively putting rutile, reduced ilmenite, mica, feldspar, white mud and marble into a crushing kettle of a vibrating screen machine, wherein the vibrating screen time of the vibrating screen machine is 10 min; taking out the powder, sieving with a sieving machine for 100 mesh for 10min to obtain powder with granularity less than 150 μm, sieving with a 200 mesh sieve for 10min, and keeping the powder with granularity of 75-150 μm;
b, mixing the rutile powder, the reduced ilmenite powder, the mica powder, the feldspar powder, the white mud powder and the marble powder which are prepared in the step A to obtain a mixture A;
adding the medium manganese powder and the nickel powder into the mixture A to obtain mixed powder, adding the mixed powder into a stirring kettle, stirring at the stirring speed of 200r/min for 5min, and obtaining mixed powder B after stirring;
and sequentially adding latex and sodium silicate into the welding filling composition B to obtain a second mixture, adding the second mixture into a stirring kettle, heating in a water bath and stirring, wherein the water temperature is 80 ℃, the stirring speed is 100r/min, and the stirring time is 10min to obtain a pasty mixture C.
In a third aspect, the present invention provides a method of using a weld filler composition prepared by the above method, comprising canning the slurry mixture C in a storage device, capping the movable sealing plug, and sealing the protective cap to maintain fluidity of the weld filler material when not in use;
when in use, the sealing protective cover of the storage device is detached, and the conical gun head is additionally arranged; a propelling mechanical device is additionally arranged at the movable sealing plug; during welding, the pushing device is pressed, the welding seam filler flows out from the gun head and is coated on a welding area, and then arc welding is carried out;
furthermore, the diameter of the through opening of the conical gun head is 1.5-6.5 mm.
Further, the propulsion device is controlled by manpower or is additionally provided with a fluid peristaltic pump.
In a fourth aspect, the invention provides a weld composition prepared by the above preparation method, and the application is to apply the weld composition to gas-carrying welding of gas pipelines.
The embodiment of the invention has the following beneficial effects:
the welding filling composition is applied to manual operation in the gas field for temporarily blocking a gas source, effectively improves the defect of welding seam quality in manual operation, forms large-scale production, can further reduce the production cost, and greatly improves the scientificity of safe operation of pipelines. Therefore, the refractory soil can replace the existing refractory soil and well make up the influence of the production stoppage of the refractory soil on the market on the operation.
Detailed Description
The present application is further described below with reference to examples.
In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.
Because of the particularity of the gas pipeline, the rush repair welding process of the gas pipeline is greatly different from the common welding process. In the leakage repair welding of a gas pipeline, under the condition of ensuring the environmental safety, a welding seam filler is firstly used for filling a pipeline leakage point, and the leaked gas is blocked. And then welding is carried out on the basis of the filled filler. In the manual construction operations such as emergency repair of a gas pipeline, air-borne joint cutting and the like, the mainly used welding seam filler is a traditional welding seam filler taking refractory earth as a main component. The main acquisition mode is external purchase.
Due to the particularity of the emergency repair of the gas pipeline, the welding seam filler is applied to the emergency repair welding operation of the gas pipeline. However, in addition to this, the use of weld filler in other welding scenarios is diminishing. In addition, the production of refractory earth is becoming more and more difficult under the background of increasing environmental requirements. Therefore, due to the shrinking market demand and environmental protection, the conventional welding seam filling materials based on the refractory soil are greatly reduced in production by the manufacturers, and some manufacturers even abandon the production of the conventional welding seam filling materials. This situation has led to a dramatic decrease in the production capacity of conventional weld filler materials on the market, resulting in the current phenomenon of insufficient supply of weld filler material. In view of the present situation, it is expected that the conventional weld filler material using the refractory earth as the main material, which is currently used, will be completely shut down and withdrawn from the market within one year. At present, the storage of refractory earth in the group is under great pressure. Therefore, in order to ensure that the daily repair welding operation of a group is not affected, a novel welding seam filling material capable of replacing the traditional welding seam filling material is urgently needed to solve the problem of insufficient productivity of the traditional material.
When the traditional weld joint filling material mainly containing the refractory soil is used for welding, firstly, the raw material of the refractory soil is mixed with water to form viscous refractory mortar, and then the viscous refractory mortar can be used for plugging pipeline cracks. However, the introduction of large amounts of water in this process would have a serious impact on the quality of the weld. During the welding process, moisture contained in the refractory mortar can generate an electrolytic reaction under the action of a welding arc to generate hydrogen and oxygen, wherein the hydrogen can cause a large amount of hydrogen-induced cracks and air holes on a welding point during the welding process. This phenomenon will seriously reduce the strength of the welded joint and affect the welding quality. In addition, the traditional refractory earth material is easy to cause air bubbles to enter the welding spot due to poor sealing performance. Meanwhile, the traditional welding seam filling material has low adhesiveness, so that excessive impurities in welding spots can be caused. The air holes reduce the effective sectional area of the welding line, so that the welding line is loosened, and the strength of the joint is reduced. The blowholes are also a factor causing stress concentration, thereby causing breakage and fracture of the welded portion and reducing the durability of the welded portion. Too big gas pocket also has the risk that causes the gas leakage, forms the potential safety hazard to the gas network. The welding effect of the gas pipeline can be detected by a ray detection shooting method. The welding part using the traditional refractory earth welding seam filler can not pass the detection because of excessive internal impurities and air holes, and the over-detection rate is low. Therefore, a new welding filler capable of effectively improving the welding quality is needed to replace the traditional welding filler to improve the quality of pipeline welding.
In the gas-carrying tangent line and emergency repair operation of a gas pipeline, the welding seam filler is mainly used for filling and plugging leakage points and pipeline joints of the pipeline, so that a leaked gas source is plugged, and the purposes of reducing welding difficulty, reducing operation risk and improving safety are achieved. However, in the use process of the traditional weld joint filling material taking the refractory soil as the main material, due to the low viscosity, low density and the like of the traditional material, the blocked mud wall is easy to have the situations of poor sealing and gas leakage under the action of high pressure inside the gas pipeline. The probability that gas fires in the welding process is greatly increased, the safety of operation is reduced, and the difficulty of operation is improved.
After the leakage point is filled with the welding seam filler which takes the refractory earth as the main raw material, and then the welding is carried out on the basis of the filled mud wall, the mud wall at the welding position cannot be fused with the welding material. During welding, the molten pool has serious slurry back-flow, too much molten iron and easily scattered state, and the welding difficulty is greatly improved. Excessive inclusion, shallow fusion depth and loose surface of the welded joint.
The effective sectional area of the welding seam is reduced and the joint strength is reduced due to the fact that the welding seam is too shallow in fusion depth. Second, the stress concentration caused by too shallow a penetration is much more detrimental than the strength reduction.
The over-shallow penetration seriously reduces the fatigue strength of the weld joint, may become a crack source, and is an important cause of weld joint damage. Therefore, the new weld filler should avoid this phenomenon as much as possible.
In combination with the problems of the existing materials at present and the summary of the construction experience before, the applicant makes a preliminary scheme. The proportion of the novel welding seam filler powder is primarily determined by taking rutile, reduced ilmenite, mica, feldspar, white mud, marble, fine mica, medium manganese and nickel powder as main raw materials. And meanwhile, sodium silicate is used as a diluent to dilute the powder to generate mud which can be directly used for plugging a leakage, so that the influence of water on the welding effect is eliminated.
The welding filling composition comprises the following components in parts by weight: 7-13 parts of rutile, 22-38 parts of reduced ilmenite, 3.5-4.5 parts of mica, 9-17 parts of feldspar, 10-18 parts of white mud, 8-14 parts of marble, 0.8-1.2 parts of latex, 7-11 parts of medium manganese, 0.4-0.6 part of nickel powder and 18-22 parts of sodium silicate.
In some embodiments, the preferred composition ratios of the components of the filling material include: 10 parts of rutile, 30 parts of reduced ilmenite, 4 parts of mica, 13 parts of feldspar, 14 parts of white mud, 11 parts of marble, 1 part of latex, 9 parts of medium manganese, 0.5 part of nickel powder and 20 parts of sodium silicate.
A preparation method of a welding seam filling composition is provided, and the welding seam composition is the welding seam composition and comprises the following steps:
respectively putting rutile, reduced ilmenite, mica, feldspar, white mud and marble into a crushing kettle of a vibrating screen machine, wherein the vibrating screen time of the vibrating screen machine is 10 min; taking out the powder, sieving with a sieving machine for 100 mesh for 10min to obtain powder with granularity less than 150 μm, sieving with a 200 mesh sieve for 10min, and keeping the powder with granularity of 75-150 μm;
mixing the rutile powder, the reduced ilmenite powder, the mica powder, the feldspar powder, the white mud powder and the marble powder prepared in the step A to obtain a mixture A;
adding the medium manganese powder and the nickel powder into the mixture A to obtain mixed powder, adding the mixed powder into a stirring kettle, stirring at the stirring speed of 200r/min for 5min, and obtaining mixed powder B after stirring;
and sequentially adding latex and sodium silicate into the welding filling composition B to obtain a second mixture, adding the second mixture into a stirring kettle, heating in a water bath and stirring, wherein the water temperature is 80 ℃, the stirring speed is 100r/min, and the stirring time is 10min to obtain a pasty mixture C.
A method of using a weld filler composition prepared by the above method, comprising canning the slurry mixture C in a storage device, capping the movable sealing plug, and sealing the protective cap to maintain fluidity of the weld filler material when not in use;
when in use, the sealing protective cover of the storage device is detached, and the conical gun head is additionally arranged; a propelling mechanical device is additionally arranged at the movable sealing plug; during welding, the pushing device is pressed, welding seam fillers flow out of the gun head and are coated on a welding area, and then arc welding is carried out;
in some embodiments of the invention, the diameter of the through opening of the conical lance head is 1.5-6.5 mm; preferably a fluid peristaltic pump.
In some embodiments of the invention, the propulsion device is manually controlled, or is equipped with a fluid peristaltic pump.
The application of the welding seam composition prepared by the preparation method is to apply the welding seam composition to gas-carrying welding of a gas pipeline.
The advantages are that: the weld filler prepared by the formula and the process has the following mechanism that the weld filler can effectively improve the penetration: firstly, the composition can affect the arc characteristics, and can improve the energy density of the arc and the arc force acting on a molten pool; secondly, the composition can influence the surface tension of the molten pool, so that the flowing direction of the molten pool is changed from inside to outside to improve the welding penetration. Compared with the existing refractory slime, the mechanical property of the weld metal is improved after welding, so that the tensile property and the shearing resistance of the weld metal are obviously improved. The filling composition is easy to form during welding, and the formed welding line is attractive in appearance, good in consistency, high in repetition rate and easy to operate by welders. And fourthly, the muddy mixture has better plugging performance on one hand and can meet the requirement of gas operation safety, and on the other hand, the muddy mixture can be better controlled and accurately coated on a welding area compared with powdery fillers. The coating mechanism is matched for use, the operation is simple during welding, and a uniform and consistent welding seam filling material coating can be obtained, so that a welding seam with uniform penetration depth is obtained in subsequent welding; the use of the conical gun head can enable welding seam filler to enter a molten pool more accurately and controllably according to required quantity, so that the filler is fully and effectively utilized, waste is prevented, and the production efficiency is improved.
The weld filler prepared by the formula and the process has the following mechanism that the weld filler can effectively improve the penetration: firstly, the composition can affect the arc characteristics, and can improve the energy density of the arc and the arc force acting on a molten pool; secondly, the composition can influence the surface tension of the molten pool, so that the flowing direction of the molten pool is changed from inside to outside to improve the welding penetration. Compared with the existing refractory slime, the mechanical property of the weld metal is improved after welding, so that the tensile property and the shearing resistance of the weld metal are obviously improved. The filling composition is easy to form during welding, and the formed welding line is attractive in appearance, good in consistency, high in repetition rate and easy to operate by welders. And fourthly, the muddy mixture has better plugging performance on one hand and can meet the requirement of gas operation safety, and on the other hand, the muddy mixture can be better controlled and accurately coated on a welding area compared with powdery fillers. The coating mechanism is matched for use, the operation is simple during welding, and a uniform and consistent welding seam filling material coating can be obtained, so that a welding seam with uniform penetration depth is obtained in subsequent welding; the use of the conical gun head can enable the weld filler to enter a molten pool more accurately and controllably according to the required amount, so that the filler is fully and effectively utilized, waste is prevented, and the production efficiency is improved.
The welding filling composition is applied to manual operation in the field of gas for temporarily blocking a gas source, effectively improves the defect of welding seam quality in manual operation, forms large-scale production, can further reduce the production cost, and greatly improves the scientificity of safe operation of pipelines. Therefore, the refractory soil can replace the existing refractory soil and well make up the influence of the production stoppage of the refractory soil on the market on the operation.
The weld joint filling material of the present invention has the welding performance compared with the conventional refractory earth as shown in table 1:
TABLE 1
For the traditional material, the diluted refractory mortar contains a large amount of moisture, and the moisture is heated and evaporated during welding. The slime becomes dry and falls off gas leakage after water loss, and the phenomenon of catching fire can be caused during welding, thereby greatly increasing the welding difficulty and reducing the safety. In addition, because the viscosity of the welding refractory mortar is poor, the leakage of the pipeline cannot bear higher gas pressure in the pipeline when being blocked.
According to the pipeline welding experiment of taking the atmospheric pressure, traditional pressure-bearing upper limit of fire clay material is only about 200pa to when pipeline gas pressure was about 200pa, the gas of leaking in the pipeline can't effectual shutoff of fire clay. During welding, gas leakage and fire can occur. Increasing the difficulty of construction. If the pipeline pressure is higher than the value, the fire-resistant clay wall for plugging can break under the action of the pressure, so that the pipeline crack is plugged and fails.
The novel weld filling material using sodium water glass as a diluent has no problem of water loss, drying and falling. And the viscosity and the strength of the novel muddy weld joint filling material diluted by the sodium water glass are far higher than those of refractory mortar diluted by water. According to the welding test with gas and pressure of the pipeline, the mud wall made of the new material can bear the gas pressure of the pipeline of about 1200pa without bursting. When the pressure is about 1200pa, the plugging effect of the new material mud wall is still good, and the phenomenon of gas seepage does not occur.
When the traditional refractory earth material is used, the powder is diluted by adding water to form a paste. In the welding process, water in the refractory mortar evaporates, and the powdery soil cannot be fused with a welding material, so that a molten pool is too shallow, slurry is seriously turned, and molten iron is too much during welding, so that the welding difficulty is increased, the loose texture and the low strength of a welding part are easily caused, a plurality of surface holes are formed, and the welding process has high requirements on the technical level of welding operators. Because the composition of the refractory soil can not fuse with the welding material, the refractory soil will remain in the welding line after welding to cause excessive weld inclusions, the penetration is too low, and the strength of the welding position is reduced.
The yellow component included in the welding seam of the traditional material is residual refractory soil powder, and the inclusion in the welding seam is serious. The weld penetration is too shallow.
The welded seam using the refractory soil as the filler has more external holes and incomplete structure. Mainly caused by the fact that the welding process is difficult to control due to serious slurry turning of a molten pool during welding.
The novel welding seam filling material has good compatibility with welding materials during welding, slurry does not turn over basically during welding, the welding seam penetration is enough, and the internal and external forming of the welded welding seam is good.
After the novel welding seam filling material is used, the welding seam has no impurities and the fusion depth is proper.
After the novel welding seam filling material is adopted, the external structure of the welding position is compact, and the problems of holes and cracks do not exist. And no slurry turning phenomenon exists during welding. The welding degree of difficulty is little, and welding effect is good.
The traditional refractory earth filler needs to be diluted by water when in use, so that the moisture in the traditional refractory earth filler can decompose hydrogen under the action of high temperature during welding. Hydrogen-induced cracks and pores are formed in the hydrogen gas after the hydrogen gas enters the welding position. The presence of these cracks and voids can reduce the strength of the weld, making the weld more susceptible to breakage or bending.
After the refractory soil is used for filling, the air holes in the welding line are more, the fusion depth of the welding line is shallow, and the strength of the welding part is low.
The new weld filler material was diluted using sodium water glass as diluent. Sodium water glass is commonly used as an arc stabilizer and binder in welding operations. The introduction of the sodium silicate not only isolates the influence of water on welding, but also enhances the viscosity of the mud wall, improves the bearing capacity and the air tightness, and simultaneously, the sodium silicate also has a certain protection effect on the welding. Therefore, the welding quality of the novel weld filler material used in the experiment is obviously higher than that of the traditional refractory earth material. The specific structural strength data and internal structural data of the weld joint welded by using the novel weld joint filling material will be described in the mechanics and ray detection part.
The traditional refractory soil filling material contains environmentally-friendly components. The dilemma of production stop is faced under the double pressure of demand reduction and environmental protection requirement. The production stoppage of the refractory soil causes the difficulty that the group faces the shortage of raw materials in the aspects of repair welding and welding of pipelines. The development of new weld filler materials will effectively solve this problem. The components of the novel welding seam filling material mainly come from raw materials frequently used in ordinary welding work, and the problem of environmental protection does not exist. Meanwhile, the formula of the novel welding seam filling material is completely and independently controlled, and the group can independently complete the whole process from raw material purchase to filling material production without purchasing from the outside. This would perfectly solve the current problem of insufficient filler supply for the weld.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. Use of a weld filler composition for gas welding of a gas pipeline;
the welding seam filling composition comprises the following components in parts by weight: 7-13 parts of rutile, 22-38 parts of reduced ilmenite, 3.5-4.5 parts of mica, 9-17 parts of feldspar, 10-18 parts of white mud, 8-14 parts of marble, 0.8-1.2 parts of latex, 7-11 parts of medium manganese, 0.4-0.6 part of nickel powder and 18-22 parts of sodium silicate;
the welding seam filling composition is prepared by the following preparation method:
respectively putting rutile, reduced ilmenite, mica, feldspar, white mud and marble into a crushing kettle of a vibrating screen machine, wherein the vibrating screen time of the vibrating screen machine is 10 min; taking out the powder, sieving with a sieving machine for 100 mesh for 10min to obtain powder with granularity less than 150 μm, sieving with a 200 mesh sieve for 10min, and keeping the powder with granularity of 75-150 μm;
mixing rutile powder, reduced ilmenite powder, mica powder, feldspar powder, white mud powder and marble powder to obtain a mixture A;
adding the medium manganese powder and the nickel powder into the mixture A to obtain mixed powder, adding the mixed powder into a stirring kettle, stirring at the stirring speed of 200r/min for 5min, and obtaining mixed powder B after stirring;
and sequentially adding latex and sodium silicate into the mixed powder B to obtain a second mixture, adding the second mixture into a stirring kettle, heating in a water bath and stirring, wherein the water temperature is 80 ℃, the stirring speed is 100r/min, and the stirring time is 10min to obtain a pasty mixture C.
2. The use of the weld filling composition according to claim 1, wherein the weld filling composition comprises the following components in parts by weight: 10 parts of rutile, 30 parts of reduced ilmenite, 4 parts of mica, 13 parts of feldspar, 14 parts of white mud, 11 parts of marble, 1 part of latex, 9 parts of medium manganese, 0.5 part of nickel powder and 20 parts of sodium silicate.
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| US3589951A (en) * | 1966-03-05 | 1971-06-29 | Kobe Steel Ltd | Solid weld backing-up flux compositions |
| US7652087B2 (en) * | 2006-02-21 | 2010-01-26 | American Thermal Holdings Company | Protective coating |
| CN102029489A (en) * | 2009-09-28 | 2011-04-27 | 李德贵 | Welding electrode coating |
| CN101865348B (en) * | 2010-05-22 | 2012-01-18 | 西南石油大学 | Freeze temporary blocking method and device for large-diameter gas pipeline |
| CN103521944B (en) * | 2013-09-27 | 2016-01-20 | 武汉光谷机电科技有限公司 | A kind of stainless sheet steel laser weld packing material and preparation method thereof |
| CN106425052B (en) * | 2016-10-31 | 2018-08-10 | 北京石油化工学院 | A kind of realization arc welding all positon one side welding with back formation method |
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